27Overload Relays. Overview Combinations of overload relays and contactors SIRIUS 3R. Thermally delayed overload relays CLASS 10

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1 27Overload Relays Overview Combinations of overload relays and contactors SIRIUS 3R 27Overload Relays Contactors Current range A 3RT10 1 Size S00 3/4/5.5 kw 3RT10 2 Size S0 5.5/7.5/11 kw 3RT10 3 Size S2 15/18.5/22 kw 3RT10 4 Size S3 30/37/45 kw Thermally delayed overload relays CLASS 10 3RU to 12 3RU to 25 3RU to 50 3RU to 100 Solid-state overload relays CLASS 10 and 20 3RB to 12 3RB to 25 1 ) 3RB to 50 3RB to 100 Thermally delayed overload relays CLASS 10 3UA60 55 to 135 3UA61 55 to 150 3UA62 55 to 205 3UA66 80 to 400 Solid-state overload relays from CLASS 5 to 30, selectable 3RB to ) 4 ) 4 ) 4 ) 3RB to 205 3RB to 500 3RB to 820 Thermistor motor protection device 3RN10 PTCs - Type A Combination possible 4/2 Siemens NS K 2000

2 SIRIUS 3R 27Overload Relays Overview Combinations of overload relays and contactors 3TF50/51 Size 6 55/75 kw 3TF52/53 Size 8 90/110 kw 3TF54/55 Size /160 kw 3TF56/57 Size /250 kw 3TF68/69 Size /450 kw / / 2 ) 2 ) 3 ) 3 ) 3 ) / / 1) Tripping class, CLASS 20 from 3 to 25 A. 2) From setting range 135 to 180 A, installation as a single unit is required (heat dissipation). 3) Installation only possible as a single unit 4) 3RB12 with bar-type transformer, installation only possible as a single unit. Siemens NS K /3

3 3RU11 Thermally Delayed Overload Relays up to 100 A CLASS 10 SIRIUS 3R Selection and ordering data 3RU11 Thermally Delayed Overload Relays Screw or Cage Clamp connection 1 ), for mounting onto contactor or for installing as a single unit with adapter (adapter for installing as a single unit see Accessories) 3RU11 overload relays with screw or Cage Clamp connection (for auxiliary conductors) Auxiliary contacts 1 NO + 1 NC Manual/automatic RESET Switch position indicator For 3RT1 contactor or soft starter 3RW3 Size 2 ) Output of 4-pole 3-phase motors Current setting range Fuse 3 ) gl/gg STOP button Test function Phase failure sensitivity Integrated sealable cover CLASS 10 Overload relays with screw connection Overload relays with Cage Clamp connection Order No. Price Order No. Price Weight approx at AC 50 Hz 400 V P n kw A A } Preferred type 1 unit 1 unit kg Size S00 with terminal for contactor coil and auxiliary contact 3RU B0 S to } 3RU AB to } 3RU BB to } 3RU CB to } 3RU DB to } 3RU EB to } 3RU FB to } 3RU GB to } 3RU HB to 1 4 } 3RU JB to } 3RU KB to } 3RU AB to 2 6 } 3RU BB to } 3RU CB to } 3RU DB to 4 16 } 3RU EB to 5 20 } 3RU FB to } 3RU GB toto 8 25 } 3RU HB to } 3RU JB to } 3RU KB0 - - Size S0 3RU D0 S to } 3RU CB0 3RU CD to } 3RU DB0 3RU DD to 4 16 } 3RU EB0 3RU ED0 3.5 to 5 20 } 3RU FB0 3RU FD to } 3RU GB0 3RU GD to 8 25 } 3RU HB0 3RU HD0 4 7 to } 3RU JB0 3RU JD to } 3RU KB0 3RU KD to } 3RU AB0 3RU AD to } 3RU BB0 3RU BD0 17 to } 3RU CB0 3RU CD to } 3RU DB0 3RU DD0 Size S2 3RU B0 S to 8 25 } 3RU HB0 3RU HD to } 3RU JB0 3RU JD to } 3RU KB0 3RU KD0 Size S to } 3RU AB0 3RU AD to } 3RU BB0 3RU BD to } 3RU DB0 3RU DD to } 3RU EB0 3RU ED to } 3RU FB0 3RU FD to } 3RU GB0 3RU GD to } 3RU HB0 3RU HD0 3RU D0 S to } 3RU DB0 3RU DD to } 3RU EB0 3RU ED to } 3RU FB0 3RU FD to } 3RU HB0 3RU HD to } 3RU JB0 3RU JD to } 3RU KB0 3RU KD0 70 to } 3RU LB0 3RU LD to ) 200 } 3RU MB0 3RU MD0. 1) See page 6 for notes on Cage Clamp connection. 2) Consider the maximum rated operational current of contactors. 3) Max. fuse for overload relay only, type of coordination 2. Fuse values for mounting onto contactor see from page 4/10. 4) Thermally delayed overload relays > 100 A see page 4/31. 4/4 Siemens NS K 2000

4 SIRIUS 3R 3RU11 Thermally Delayed Overload Relays up to 100 A CLASS 10 Screw or Cage Clamp connection 1 ), for installing as a single unit 3RU11 overload relays with mounted adapter for installing as a single unit Screw and snap-on mounting onto 35 mm standard mounting rail Size S3 also for 75 mm standard mounting rail 3RU11 overload relays with screw or Cage Clamp connection (for auxiliary conductors) Auxiliary contacts 1 NO + 1 NC Manual/automatic RESET Switch position indicator For 3RT1 contactor or soft starter 3RW3 Size 2 ) Output of 4- pole 3-phase motors Current setting range Fuse 3 ) gl/gg Test function, STOP button Phase failure sensitivity Integrated sealable cover CLASS 10 Overload relays with screw connection Selection and ordering data Overload relays with Cage Clamp connection Order No. Price Order No. Price Weight approx. at 50 Hz 400 V AC P n kw A A } Preferred type 1 unit 1 unit kg Size S00 3RU C1 S to } 3RU AB1 3RU AC to } 3RU BB1 3RU BC to } 3RU CB1 3RU CC to } 3RU DB1 3RU DC to } 3RU EB1 3RU EC to } 3RU FB1 3RU FC to } 3RU GB1 3RU GC to } 3RU HB1 3RU HC to 1 4 } 3RU JB1 3RU JC to } 3RU KB1 3RU KC to } 3RU AB1 3RU AC1 1.4 to 2 6 } 3RU BB1 3RU BC to } 3RU CB1 3RU CC to } 3RU DB1 3RU DC to 4 16 } 3RU EB1 3RU EC1 3.5 to 5 20 } 3RU FB1 3RU FC to } 3RU GB1 3RU GC to 8 25 } 3RU HB1 3RU HC1 4 7 to } 3RU JB1 3RU JC to } 3RU KB1 3RU KC1 Size S0 3RU B1 S to } 3RU AB to } 3RU BB1-17 to } 3RU CB to } 3RU DB1 - Size S2 3RU B1 S to } 3RU EB to } 3RU FB1-36 to } 3RU GB to } 3RU HB1 - Size S3 3RU B1 S to } 3RU JB to } 3RU KB1-70 to } 3RU LB to ) 200 } 3RU MB1-1) See page 6 for notes on Cage Clamp connection. 2) Consider the maximum rated operational current of contactors. 3) Max. fuse for overload relay only, type of coordination 2. Fuse values for mounting onto contactor see from page 4/10. 4) Thermally delayed overload relays > 100 A see page 4/31. Siemens NS K /5

5 3RU11 Thermally Delayed Overload Relays up to 100 A CLASS 10 SIRIUS 3R Accessories Design For type Order No. Price Weight approx. Pack. Size 1 unit kg unit Adapter for installing as a single unit 3RU19.6-3AA01 For separate mounting of overload relays, S00 3RU AA Screw and snap-on mounting onto S0 3RU AA mm standard mounting rail S2 3RU AA Size S3 also for 75 mm standard mounting rail S3 3RU AA Mechanical RESET 3RU A Resetting plunger, holder and funnel S00 to S3 3RU A set Suitable pushbutton IP mm 3SB AH Holder for pushbutton 3SB AC Indicator label with inscription RESET 3SB EM 20 with pushbutton, holder and indicator label Cable release with support for RESET 3RU (a bore of 6.5 mm dia. is required Length 400 mm S00 to S3 3RU B set in the switchboard, Length 600 mm 3RU C max. switchboard thickness 8 mm) Module for remote RESET, electrical 3RU A.71 Operating range 0.85 to 1.1 x U s S00 to S3 Power consumption AC 120 VA, DC 70 W ON period 0.2 s to 4 s AC/DC 24 V to 30 V 3RU AB AC/DC 110 V to 127 V 3RU AF71 AC/DC 220 V to 250 V 3RU AM71 Cover Cover for cable lug and busbar connection S3 3RT EA1 1 Cover for box terminals S2 3RT EA2 1 S3 3RT EA2 1 4/6 Siemens NS K 2000

6 SIRIUS 3R 3RU11 Thermally Delayed Overload Relays up to 100 A CLASS 10 Technical data according to IEC and IEC Type 3RU RU RU RU Size S00 S0 S2 S3 Trip class acc. to IEC CLASS 10 Phase failure sensitivity yes Increased safety EEx e KEMA test certificate No.EX-97.Y.3235 DMT 98 ATEX G001 Adjustable to automatic reset yes RESET button with trip-free feature yes Permissible ambient temperature (above +60 C current reduction) Storage/transport C 55 to +80 operation C 20 to +70 Permissible rated current at temperature inside cubicle 60 C % 100 temperature inside cubicle 70 C % 87 Temperature compensation C up to 60 Switch position indicator yes Test function yes STOP button yes Terminal for contactor coil yes not required Terminal for contactor coil auxiliary contacts yes not required Degree of protection acc. to IEC /DIN VDE 0470 Part 1 IP 20 IP 20 1 ) Shock-hazard protection acc. to DIN VDE 0106 Part 100 Safe from finger touch Shock resistance with sine acc. to IEC Part 2-27 g/ms 8/10 Main circuit Rated insulation voltage U i (pollution degree 3) V Rated impulse withstand voltage U imp kv 6 8 Type of current DC, AC Current setting A up to up to up to up to Power losses per unit (max.) W 3.9 to to 6 6 to 9 10 to 16.5 Short-circuit protection with fuses overload relays alone together with contactor 2 ) ) Conductor cross-section main circuit Type of connection Screw connection Box terminal Terminal screw Pozidriv size 2 Pozidriv size 2 4 mm Allen screw Conductor cross-sections solid mm 2 2 x (0.5 to 1..5) 2 x (1 to 2.5) 2 x (0.75 to 16) 2 x (2.5 to 16) mm 2 2 x(0.75 to 2.5) 2 x (2.5 to 6) stranded mm 2 2 x (0.5 to 1.5) 2 x (1 to 2.5) 2 x (0.75 to 25) 2 x (10 to 50) 2 mm 2 x(0.75 to 2.5) 2 x (2.5 to 6) 1 x (0.75 to 35) 1 x (10 to 70) finely stranded with end sleeve mm 2 2 x (0.5 to 1.5) 2 x (1 to 2.5) 2 x (0.75 to 16) 2 x (2.5 to 35) mm 2 2 x(0.75 to 2.5) 2 x (2.5 to 6) 1 x (0.75 to 25) 1 x (2.5 to 50) AWG conductor connections AWG 2 x (18 to 14) 2 x (14 to 10) 2 x (18 to 3) 2 x (10 to 1/0) solid or stranded AWG 1 x (18 to 2) 2 x (10 to 2/0) Removable box terminal busbar connection mm 18 x 10 with cable lug connection mm 2 to 2 x 70 1) Terminal department: degree of protection IP 00. 2) See selection and ordering data from page 4/4. 3) See page 4/10 and page 4/11. Siemens NS K /7

7 3RU11 Thermally Delayed Overload Relays up to 100 A CLASS 10 Technical data according to IEC and IEC SIRIUS 3R Type 3RU RU RU RU Size S00 S0 S2 S3 Auxiliary circuit Auxiliary contacts 1 NO + 1 NC Contact rating NC at AC, AC-14/AC-15 Rated operational current I e at U e : 24 V A V A V A A 0.6 NO at AC, AC-14/AC-15 Rated operational current I e at U e : 24 V A V A V A A 0.6 NC, NO at DC, DC-13 Rated operational current I e at U e : 24 V A V A 0, V A 0.1 Conventional thermal current I th A 6 Contact reliability yes (suitability for PLC control; 17 V, 5 ma) Short-circuit protection Fuse links Utilization category gl/gg A 6 fast A 10 Miniature circuit-breakers, C-characteristics A 6 1 ) Rated insulation voltage U i (pollution degree 3) V 690 Rated impulse withstand voltage U imp kv 6 Conductor cross-sections of auxiliary circuit Type of connection Screw connection Cage Clamp connection 2 ) Terminal screw Pozidriv size 2 Min./max. conductor cross-sections solid mm 2 2 x (0.5 to 1.5)/ 2 x (0.75 to 2.5) 2 x (0.5 to 2.5) stranded mm 2 2 x (0.5 to 1.5)/ 2 x (0.75 to 2.5) 2 x (0.5 to 2.5) finely stranded with end sleeve mm 2 2 x (0.5 to 1.5)/ 2 x (0.75 to 2.5) 2 x (0.5 to 1.5) AWG cond. connect., solid or stranded AWG 2 x (18 to 14) 2 x (18 to 14) Adapter for installing as a single unit for screw and snap-on mounting onto 35 mm standard mounting rail, Size S3 also for 75 mm standard mounting rail Type 3RU AA01 3RU AA01 3RU AA01 3RU AA01 For overload relays 3RU RU RU RU Conductor cross-sections of main circuit Type of connection Screw connection Box terminal Terminal screw Pozidriv size 2 Pozidriv size 2 Pozidriv size 2 4 mm Allen screw Minimum/maximum conductor cross-sections finely stranded with end 1 concuctor mm to to to to 50 sleeve solid or stranded 1 conductor mm to 4 3 ) 1 to to to 70 AWG conductor connections, solid or stranded 1 x AWG 18 to to to 2 10 to 1/0 s-, u-, U-Ratings Auxiliary circuit Switching capacity B600. R300 1) Up to I K 0.5 ka; 260 V. 2) See page 6 for notes on Cage Clamp connection. 3) Not acc. to IEC. 4/8 Siemens NS K 2000

8 SIRIUS 3R 3RU11 Thermally Delayed Overload Relays up to 100 A CLASS 10 Selection guide Contactor assemblies for star-delta starting Rated motor Current setting range Overload relay Line and Star contactor Wiring current (The overload relays must be set to 0.58 times the rated motor current) delta contactor assembly kit A A Type Type Type Type Size S to to to to to to 2.5 3RU AB0 3RU BB0 3RU CB0 3RT RT RT RT RT RT RA B 3RA B 3RA B 3.8 to to to to to to to to 6.3 3RU DB0 3RU EB0 3RU FB0 3RU GB0 3RT RT RT RT RT RT RT RT RA B 3RA B 3RA B 3RA B 9.5 to to to 21 Size S0 3.1 to to to to 8 7 to 10 9 to to to to 4 3RU HB0 3RU JB0 3RU KB0 3RU CB0 3RU DB0 3RU EB0 3RT RT RT RT RT RT RT RT RT RT RT RT RA B 3RA B 3RA B 3RA B 3RA B 3RA B 6 to to to to to to 8 3RU FB0 3RU GB0 3RU HB0 3RT RT RT RT RT RT RA B 3RA B 3RA B 12.1 to to to to 10 9 to to 16 3RU JB0 3RU KB0 3RU AB0 3RT RT RT RT RT RT RA B 3RA B 3RA B 24.1 to to to 43 Size S2 9.5 to to to to to to to 8 7 to 10 9 to RU BB0 3RU CB0 3RU DB0 3RU HB0 3RU JB0 3RU KB0 3RT RT RT RT RT RT RT RT RT RT RT RT RA B 3RA B 3RA B 3RA B 3RA B 3RA B 19 to to to to to to to to 32 3RU AB0 3RU BB0 3RU DB0 3RU EB0 3RT RT RT RT RT RT RT RT RA B 3RA B 3RA B 3RA B 48.3 to to to 86.2 Size S3 31 to to to to to to to to to 40 3RU FB0 3RU GB0 3RU HB0 3RU DB0 3RU EB0 3RU FB0 3RT RT RT RT RT RT RT RT RT RT RT RT RA B 3RA B 3RA B 3RA B 3RA B 3RA B 62.1 to to to to 63 3RU HB0 3RU JB0 3RT RT RT RT RA B 3RA B 98.3 to to to to to to 100 3RU KB0 3RU LB0 3RU MB0 3RT RT RT RT RT RT RA B 3RA B 3RA B Siemens NS K /9

9 3RU11 Thermally Delayed Overload Relays CLASS 10 SIRIUS 3R Technical data Short-circuit protection with fuses for motor feeders with short-circuit currents up to 70 ka at AC 50/60 Hz 690 V Permissible short-circuit fuses for motor starters comprising overload relay and contactor, type of coordination 2 Size S00 ULfuse Circuit-breaker for Current setting range 3 kw 3RT kw 3RT kw 3RT10 17 starter protection at I e max = 7 A (at AC 50 Hz 400 V) I e max = 9 A (at AC 50 Hz 400 V) I e max = 12 A (at AC 50 Hz 400 V) RK5 I q = 50 ka / AC 400 V A gl/gg am BS88T gl/gg am BS88T gl/gg am BS88T A 0.11 to to RV1321-0BC to RV1321-0CC to RV1321-0DC to RV1321-0EC to RV1321-0FC to RV1321-0GC to RV1321-0HC to RV1321-0JC to RV1321-0KC to RV1321-1AC to RV1321-1BC to to to to to to to to Size S0 ULfuse Circuit-breaker for Current setting range 5.5 kw 3RT kw 3RT kw 3RT10 26 starter protection at I e max = 12 A (at AC 50 Hz 400 V) I e max = 17 A (at AC 50 Hz 400 V) I e max = 25 A (at AC 50 Hz 400 V) RK5 I q = 50 ka / AC 400 V A gl/gg am BS88T gl/gg am BS88T gl/gg am BS88T A 1.8 to RV1321-1CC to RV1321-1DC to RV1321-1EC to RV1321-1FC to RV1321-1GC to RV1321-1HC10 7 to RV1321-1JC10 9 to RV1321-1KC10 11 to RV1321-4AC10 14 to RV1321-4BC10 17 to RV1321-4CC10 20 to Type of coordination 1 see short-circuit protection of contactors, Part 3. 4/10 Siemens NS K 2000

10 SIRIUS 3R 3RU11 Thermally Delayed Overload Relays CLASS 10 Technical data Short-circuit protection with fuses for motor feeders with short-circuit currents up to 70 ka at AC 50/60 Hz 690 V Permissible short-circuit fuses for motor starters comprising overload relays and contactor, type of coordination 2 Size S2 ULfuse Circuit-breaker for Current setting range 15 kw 3RT kw 3RT kw 3RT10 36 starter protection at I e max = 32 A (at AC 50 Hz 400 V) I e max = 40 A (at AC 50 Hz 400 V) I e max = 50 A (at AC 50 Hz 400 V) RK5 I q = 50 ka / AC 400 V A gl/gg am BS88T gl/gg am BS88T gl/gg am BS88T A 5.5 to to to to to to RV1331-4DC10 22 to RV1331-4EC10 28 to RV1331-4FC10 36 to RV1331-4GC10 40 to RV1331-4HC10 Size S3 UL-fuse Circuit-breaker for Current setting range 30 kw 3RT kw 3RT kw 3RT10 46 RK5 starter protection at I e max = 65 A (at AC 50 Hz 400 V) I e max = 80 A (at AC 50 Hz 400 V) I e max = 95 A (at AC 50 Hz 400 V) I q = 50 ka/ AC 400 V A gl/gg am BS88T gl/gg am BS88T gl/gg am BS88T A 18 to to to to to RV1341-4JC10 57 to RV1341-4KC10 70 to RV1341-4LC10 80 to RV1341-4MC10 Type of coordination 1 see short-circuit protection of contactors, Part 3. Siemens NS K /11

11 3RU11 Thermally Delayed Overload Relays CLASS 10 SIRIUS 3R Description Specifications Overload relays 3RU11 IEC , IEC and DIN VDE The 3RU11 overload relays are suitable for use in any climate. a The devices are shock-hazardprotected acc. to DIN VDE 0106 Part 100. s d General 3RU11 overload relays belong to the new generation of SIRIUS 3R switching devices. They are available in four different sizes with up to 100 A. The 3RU11 overload relays replace the highly successful 3UA5 and 3UA7 devices. Outstanding features of the new relays include long-term stability and a long service life.the overload relays are optimally matched, both electrically and mechanically, to the 3RT10 contactors and 3RW3 soft starter. They can, however, also be mounted separately with an adapter for installation as a single unit. Devices up to and including size S0 can be fitted on standard mounting rails without using tools. 3RU11 overload relays cannot be mounted on 3TF contactors. Environment The devices are manufactured using environmentally-compatible and recyclable materials only. Application 3RU11 thermal overload relays provide overload protection for three-phase induction motors with rated currents of up to 100 A (45 kw, AC-3, 400 V). Fuses or 3RV13 circuit-breakers for starter combinations (see Part 1) must be fitted for shortcircuit protection. Operation of frequency converters The thermal overload relays 3RU11 are suitable for operation on frequency converters. f Ambient conditions Thanks to the new bimetals used and continuous temperature compensation, the devices can be implemented without restrictions at an ambient temperature of up to 60 C. Auxiliary contacts The overload relays are equipped with an NC contact for disconnecting the contactor and an NO contact for signalling tripping. The breaking capacity of the switching contacts is very high so that the contactor coils can be switched directly. Trip class The relays are designed in accordance with trip class 10, i. e. they can be used for motor start-up times of up to 10 s. Phase failure sensitivity A phase failure sensitivity function is integrated in order to provide overload protection in the event of a phase failure, i. e. premature tripping with doublephasing. Setting the overload relay The current setting screw can be accessed once the transparent, sealable cover has been removed. The overload relay must be set to the rated motor current. STOP funktion Activating this function only affects the NC contact. g h j k l Manual/automatic reset Manual or automatic reset can be selected with the blue button. The appropriate setting is selected by pressing and turning the button and can be sealed. Test function and switch position indicator The switch position indicator also incorporates a test function which, when activated, simulates a tripped overload relay. Both auxiliary contacts are actuated and the switch positon is indicated. Terminal for contactor coil and auxiliary contact When the 3RU11 16 overload relays (size S00) are mounted directly on the contactor, the auxiliary contact and coil terminals A2 of the contactor are fed through which considerably facilitates wiring. This is not necessary with sizes S0 to S3 as the contactors are equipped with 4 coil terminals. Cage Clamp connection 1 ) As of now, 3RU11 overload relays are available with Cage Clamp terminals. S00 relays are fitted with Cage Clamp terminals on the main and auxiliary contacts and relay sizes S0 to S3 on the auxiliary contacts. a Equipment identifying marker s Manual/automatic RESET selector switch d STOP button f Complete Order No. on front of device g Switch position indicator and TEST function h Transparent cover, sealable, secures the current setting screw, Test function and manual/automatic RESETposition j Current setting screw k Terminal for contactor coil (when mounted on contactor) l Terminal for auxiliary contacts (when mounted on contactor) Accessories The accessories available are suitable for use with all sizes. Electrical remote RESET with different voltage variants. Mechanical remote RESET comprising a tappet, funnel and holder for actuating the switchgear cabinet door with a 3SB1 pushbutton. Cable release for RESET for devices which are not easily accessible. Overload protection of flameproof motors of protection types increased safety EEx e EN /DIN VDE 0165, DIN VDE 0170/0171. KEMA test certificate No. Ex-97.Y.3235 DMT 98 ATEX G001 EN : A1... A5, increased safety e : Appendix A, guidelines for temperature monitoring squirrel - cage motors in operation. 1) See page 6 for notes on Cage Clamp connection. 4/12 Siemens NS K 2000

12 SIRIUS 3R 3RU11 Thermally Delayed Overload Relays CLASS 10 Description Tripping characteristics The current-time curves show the relatonship between the tripping time from cold state and multiples of the set current I e. When the relay is at operating temperature and carrying 1.0 I e, the tripping times are reduced to approximately 25 %. For single-pole loads the tripping curves lie between the curves shown. For normal operation, all 3 bimetallic strips of the overload relay must be heated. The 3RU11 overload relays are suitable for protecting motors with phase control. For protecting single-phase or DC-loads, all three main conducting paths must be connected in series. The release current with a 3-pole symmetrical load is between 105 % and 120 % of the set current. Trip classes of thermal, delayed magnetic or solid-state overload relays excerpt from IEC CLASS Tripping time t A in seconds at 7.2 x I e from cold state 10 A 2 < t A < t A < t A < t A 30 Typical time-current characteristic Protection of DC motors Internal circuit diagrams Single-pole 2-pole 3RU11 16 overload relays 3RU11 2 to 3RU11 4 overload relays Siemens NS K /13

13 3RB10 Solid-State Overload Relays up to 100 A CLASS 10 and CLASS 20 SIRIUS 3R Selection and ordering data 3RB10 Solid-State Overload Relays Screw connection, for mounting onto contactors or for installing as a single unit with adapter (adapter for installing as a single unit see Accessories) 3RB10 overload relays with Self-supply Auxiliary contacts 1 NO + 1 NC Manual/automatic RESET Switch position indicator For contactor or soft starter Size 1 ) Output of 4-pole 3-phase motors at AC 50 Hz 400 V P n kw Current setting range Fuse 2 ) gl/gg A A Test function, STOP button Phase failure/asymmetry sensitivity CLASS 10 Overload relays Order No. Price } Preferred type 1 unit kg CLASS 10, size S00 with terminal for contactor coil and auxiliary contacts S00 up to to } 3RB RB to to } 3RB NB to to 6 20 } 3RB PB0 1.1 to to } 3RB SB0 Weight approx. CLASS 10, size S0 S0 up to to } 3RB RB to to } 3RB NB to to 6 25 } 3RB PB0 1.1 to to } 3RB SB0 3 to 11 6 to } 3RB QB0 CLASS 10, size S2 S2 3 to 11 6 to } 3RB QB0 7.5 to to } 3RB UB0 CLASS 10, size S3 S3 7.5 to to } 3RB UB0 11 to to } 3RB EB0 Installation as a single unit 3RB10 with fitted adapter for installing as a single unit, for trip class CLASS 10 Size 1 ) Output of 4-pole 3-phase motors at AC 50 Hz 400 V P n kw Current setting range Fuse 2 ) gl/gg A A Overload relays Order No. Price } Preferred type 1 unit kg CLASS 10, width 45 mm S to } 3RB RB to } 3RB NB1 1.5 to 6 20 } 3RB PB1 3 to } 3RB SB1 S 0 6 to } 3RB QB1 CLASS 10, width 55 mm S 2 13 to } 3RB UB1 CLASS 10, width 70 mm S 3 25 to } 3RB EB1 Weight approx. 1) Consider the maximum rated operational current of the units. 2) Thermally delayed overload relays > 100 A see page 4/19. 4/14 Siemens NS K 2000

14 SIRIUS 3R 3RB10 Solid-State Overload Relays up to 100 A CLASS 10 and CLASS 20 Selection and ordering data Screw connection, for mounting onto contactors or for installing as a single unit with adapter (adapter for installing as a single unit see Accessories) 3RB10 overload relays with Self-supply Auxiliary contacts 1 NO + 1 NC Manual/automatic RESET Switch position indicator For contactor or soft starter Size 1 ) Output of 4-pole 3-phase motors at AC 50 Hz 400 V P n kw Current setting range Fuse 2 ) gl/gg A A Test function, STOP button Phase failure/asymmetry sensitivity CLASS 20 Overload relays Order No. Price } Preferred type 1 unit kg CLASS 20, size S00 with terminal for contactor coil and auxiliary contact S00 up to to } 3RB RB to to } 3RB NB to to } 3RB PB0 1.1 to to } 3RB SB0 Weight approx. CLASS 20, size S0 S0 1.1 btois to } 3RB SB to 11 6 to } 3RB QB0 CLASS 20, size S2 S2 3 to 11 6 to } 3RB QB0 7.5 to to } 3RB UB0 CLASS 20, size S3 S3 7.5 to to } 3RB UB0 11 to to } 3RB EB0 1) Consider the maximum rated operational current of the units. 2) Thermally delayed overload relays > 100 A and see Page 4/19. Siemens NS K /15

15 3RB10 Solid-State Overload Relays up to 100 A CLASS 10 and CLASS 20 SIRIUS 3R Accessories Design For type Order No. Price Weight approx. Pack. Size } Preferred type 1 unit kg unit Adapter for installing as a single unit 3RU19.6-3AA01 For separate mounting of overload relays, S00 } 3RU AA screw and snap-on mounting onto S0 } 3RU AA mm standard mounting rail S2 } 3RU AA Size S3 also for 75 mm standard mounting rail S3 } 3RU AA Mechanical RESET 3RU A Resetting plunger, holder and funnel S0 to S3 } 3RU A set Suitable pushbutton IP mm } 3SB AH Holder for pushbutton } 3SB AC Indicator label with inscription RESET } 3SB EM 20 with pushbutton, holder and indicator label Cable release with support for RESET 3RU B, -1C A bore of 6.5 mm is required Length 400 mm in the switchboard For a max. switchboard thickness of 8 mm Length 600 mm S00 to S3 } 3RU B set } 3RU C Module for remote RESET, electrical 3RU A.71 Operating range 0.85 to 1.1 x U s Power consumption AC 120 VA, DC 70 W ON period 0.2 s to 2 s AC/DC 24 V to 30 V S00 to S3 } 3RU AB AC/DC 110 V to 127 V } 3RU AF71 AC/DC 220 V to 250 V } 3RU AM71 Sealable cover, transparent For covering current-setting screw and for immobilization of the selector switch Manual/automatic RESET (bag of 10 covers) S00 to S3 } 3RB B 1 bag 4/16 Siemens NS K 2000

16 SIRIUS 3R 3RB10 Solid-State Overload Relays up to 100 A CLASS 10 and CLASS 20 Technical data according to IEC and IEC Type 3RB RB RB RB Size S00 S0 S2 S3 Trip class IEC CLASS 10 and 20, depending on version Phase failure sensitivity Tripping from warm state s < 3 PTB Test Report (increased safety EEx e) /98 Permissible ambient temperature storage/transport C 55 to +80 operation C 20 to +70 Adjustable to automatic reset yes Recovery time for automatic RESET min ca. 4 for manual RESET sofort Switch position indicator/test function yes RESET button yes STOP button yes Terminal for contactor coil yes not required Terminal for auxiliary contacts yes not required Degree of protection acc. to IEC /DIN VDE 0470 Part 1 IP 20 IP 20 1 ) Shock-hazard protection acc. to DIN VDE 0106 Part 100 Safe from finger touch Shock resistance with sine acc. toacc. to IEC Part 2-27 g/ms 8/10 and 15 /11 Mounting position any EMC immunity Conducted interference injection Burst acc. to IEC : (corresponds to severity 3) kv 2 Conducted interference injection Surge acc. to IEC : (corresponds to severity 3) Electrostatic discharge acc. to IEC : (corresponds to severity 3) Field-generated interference injection acc. to IEC : (corresponds to severity 3) kv 2 kv 8 Resistance to extreme climates Humidity % 100 Main circuit V/m ) 10 Rated insulation voltage U i (pollution degree 3) V Rated impulse withstand voltage U imp kv 6 8 Type of current AC Frequency range 50/60 Hz ± 3 Current setting A to 3 12 Own power consumption W (VA) approx Short-circuit protection with fuses Overload relays alone 3 ) together with contactor 4 ) Conductor cross-sections for main circuit to to to Type of connection Screw connection Box terminal Terminal screw Pozidriv size 2 Pozidriv size 2 Pozidriv size 2 4mm Allen screw Conductor cross-sections solid mm 2 2 x (0.5 to 1.5) 2 x (1 to 2.5) 2 x (0.75 to 16) 2 x (2.5 to 16) mm 2 2 x (0.75 to2.5) 2 x (2.5 to 6) stranded mm 2 2 x (0.5 to 1.5) 2 x (1 to 2.5) 2 x (0.75 to 25) 2 x (10 to 50) mm 2 2 x(0.75 to 2.5) 2 x (2.5 to 6) 1 x (0.75 to 35) 1 x (10 to 70) finely stranded with end sleeve mm 2 2 x (0.5 to 1.5) 2 x (1 to 2.5) 2 x (0.75 to 16) 2 x (2.5 to 35) mm 2 2 x(0.75 to 2.5) 2 x (2.5 to 6) 1 x (0.75 to 25) 1 x (2.5 to 50) AWG conductor connections AWG 2 x (18 to 14) 2 x (14 to 10) 2 x (18 to 3) 2 x (10 to 1/0) solid or stranded AWG 1 x (18 to 2) 2 x (10 to 2/0) Removable box terminal Busbar connection mm 18 x 10 With cable lug connection mm 2 to 2 x 70 1) Connection area: degree of protection IP 00. 2) 3 V/m for current setting range 0.1 to 0.4 A. 3) See Selection and ordering data. 4) See table on page 4/19. Siemens NS K /17

17 3RB10 Solid-State Overload Relays up to 100 A CLASS 10 and CLASS 20 Technical data according to IEC and IEC SIRIUS 3R Type 3RB RB RB RB Size S00 S0 S2 S3 Auxiliary circuit Auxiliary contacts 1 NO + 1 NC Contact rating at AC-14/AC-15 Rated operational current I e at U e: 24 V A V A V A V A V A 1 at DC-13 Rated operational current I e at U e : 24 V A V A V A 0.1 Contact reliability Contacts suitable for PLCs yes (17 V, 5 ma) Short-circuit protection Fuse links Utilization category gl/gg A 6 fast A 10 Miniature circuit-breaker C-characteristics (to l k <= 0.5 ka; <= 260 V) A 6 1 ) Rated insulation voltage U i (pollution degree 3) V 690 Rated impulse withstand volltage U imp kv 6 Conductor cross-sections of auxiliary circuit Type of connection Screw connection Terminal screw Pozidriv size 2 Min./ max. conductor cross-sections finely stranded with end sleeve mm 2 2 x (0.5 to 1.5)/ 2 x (0.75 to 2.5) solid or stranded mm 2 2 x (0.5 to 1.5)/ 2 x (0.75 to 2.5) AWG conductor connections, AWG 2 x (18 to 14) solid or stranded Adapter for installing as a single unit For screw and snap-on mounting onto 35 mm standard mounting rail, size S3 also for 75 mm standard mounting rail Type 3RU AA01 Conductor cross-sections main circuit 3RU AA01 3RU AA01 3RU AA01 Type of connection Screw connection Box terminal Terminal screw Pozidriv Pozidriv Pozidriv 4 mm Allen screw Min./max. conductor cross-sections finely stranded with end sleeve mm 2 1 x (0.5 to 2.5) 1 x (1 to 6) 1 x (0.75 to 25) 1 x (2.5 to 50) Min./max. conductor cross-sections solid or stranded mm 2 1 x (0.5 to 4 2 ) 1 x (1 to 6) 1 x (0.75 to 35) 1 x (2.5 to 70) Min./max. conductor cross-sections AWG conductor connections, solid or stranded mm 2 1 x (18 to 14) 1 x (14 to 10) 1 x (18 to 2) 1 x (10 to 1/0) s-, u-, U-ratings Auxiliary circuit Switching capacity B600. R300 1) Up to I K 0,5 ka; 260 V. 2) Not acc. to IEC. 4/18 Siemens NS K 2000

18 SIRIUS 3R 3RB10 Solid-State Overload Relays CLASS 10 and CLASS 20 Technical data Short-circuit protection with fuses for motor feeders for short-circuit currents up to 50 ka at 690 V Overload relays contactor CLASS Fuse links 2 ) Current setting 5 and NH Type 3NA NH British range Rated operational current I e DIAZED Type 5SB Type 3ND Standard U L -listed AC-3 in A bei NEOZED Type 5SE fuses fuses Type Type 400 V 500 V 690 V 400 V 500 V 690 V Utilization category gl/gg type of coordination 3 ) am BS88, Type T Size S A to 0.4 A 3RT RB A to 1.6 A 3RT RB A to 6 A 3RT RB RT A to 12 A 3RT RB10 16 Size S0 0.1 A to 0.4 A 3RT A to 1.6 A 3RT A to 6 A 3RT A to 12 A 3RT RB A to 25 A 3RT RB RT RT Size S2 6 A to 25 A 3RT RB RT A to 50 A 3RT RB RT RT Size S3 13 A to 50 A 3RT RB RT A to 100 A 3RT RB RT RT TF50 1 ) TF51 1 ) TF52 1 ) CLASS R K5 1) Mounting of contactor not possible, only installation as a single unit with individual wiring. 2) Observe the operational voltage. 3) Coordination and short-circuit equipment according to IEC /DIN VDE 660 Part 102. Type of coordination 1 : The contactor or starter must not endanger persons or the installation in the event of a short-circuit. They do not need to be suitable for further operation without repair and the renewal of parts. Type of coordination 2 : The contactor or starter must not endanger persons or the installation in the event of a short-circuit and must be suitable for further use. There is a danger of contact welding. Siemens NS K /19

19 3RB10 Solid-State Overload Relays up to 100 A CLASS 10 and CLASS 20 SIRIUS 3R Description Specifications IEC , IEC and DIN VDE RB10 overload relays are suitable for use in any climate. The devices are shock-hazardprotected acc. to DIN VDE 0106, Part 100. General The 3RB10 overload relays form part of the new SIRIUS 3R switchgear generation. The solid-state version of the SIRIUS 3R overload relay is noted for its extensive setting ranges (setting ratio 1:4), for the phase failure protection function (see characteristic curves) and also for the minimal energy requirement. In terms of dimensions and termination, the solid-state (3RB10) and the thermally delayed types (3RU11) are 100 % compatible. These devices are particularly suitable where motor protection requirements are high and for motor starting times up to 20 s (CLASS 20 version). A special coating of the printedcircuit board and of the electronic components assures reliable operation even in aggressive and tropical atmospheres. Four sizes and two variants are available up to 100 A. The overload relays are optimally matched, both electrically and mechanically, to the 3RT10 contactors or 3RW3 soft starter. They can, however, also be mounted separately with an adapter for installation as a single unit. Devices up to and including size S0 can be fitted on standard mounting rails without using tools. Application 3RB10 solid-state overload relays provide overload protection for three-phase induction motors with rated currents of up to 100 A (45 kw, AC-3, 400 V). For short-circuit protection with fuses or circuit-breakers, the fusing values of the contactors must be taken into account. Operation The solid-state overload relays have been developed for use in sinusoidal 50/60 Hz voltage networks. No additional power supply is required for operation. Current transformers (for measurement) are already integrated. An ASIC (applicationspecific integrated circuit) checks the current values of each phase and initiates release in the event of overload or phase failure. The tripping current corresponds to 114 % of the set current. The overload relays must be set to the rated motor current. Operation on frequency converters The 3RB10 solid-state overload relays are not suitable for the operation on frequency converters. (Use thermal overload relays.) Operation of single-phase motors The 3RB10 solid-state overload relay is not suitable for the operation of single-phase motors. Use the normal 3RU11 thermal overload relay instead. Trip classes The devices are available in CLASS 10 for normal starting (motor starting times up to 10 s) and in CLASS 20 for arduous startup conditions (motor starting times up to 20 s). Phase failure protection The 3RB10 solid-state overload relays are equipped with phasefailure protection. If a phase fails, the device trips after only 3s. STOP function Activating this function only affects the NC contact. Manual/automatic reset Manual or automatic reset can be selected with the blue button. The appropriate setting is selected by pressing and turning the button. Bei Automatik-RESET setzt das Überlastrelais nach einer Wiederbereitschaftszeit von 4 min zurück. Rücksetzen per Hand ist jederzeit möglich. Overload relays 3RB10 a s d f Test function and switch position indicator The switch position indicator also incorporates a test function which, when activated, simulates a tripped overload relay. Both auxiliary contacts are actuated and the switch position is indicated. Terminal for contactor coil and auxiliary contact When the 3RB10 16 overload relay (size S00) is mounted directly on the contactor, the auxiliary contact and coil terminal A2 of the contactor are fed through which considerably facilitates wiring. This is not necessary with sizes S0 as the contactors are equipped with 4 coil terminals. Auxiliary contacts The overload relays are equipped with an NC contact for disconnecting the contactor and an NO contact for signalling tripping. The breaking capacity of the switching contacts is very high so that the contactor coils can be switched directly. a Test function and switch position indicator s STOP button d Manual/automatic RESET selector switch f 1NO + 1NC g Trip class h Current setting screw, setting ratio 1:4 e. g. 3 to 12 A Mounting The overload relays are mounted directly on the 3RT10 contactors. If they are fitted individually on a connector base, they can be fastened by means of screws or placed on a mounting rail. The connector bases of the 3RU11 thermally delayed relays can be used. Accessories The accessories of the 3RU11 thermal overload relays can be used for the 3RB10 solid-state overload relays. Electrical remote RESET with different voltage variants. Mechanical remote RESET comprising a tappet, funnel and holder for actuating the switchgear cabinet door with 3SB1 pushbutton. Cable release for RESET for devices which are not easily accessible. Sealable cover. PTB Test Report The solid-state overload relay 3RB10 conforms to the specifications for overload protection of explosion-protected motors with the increased safety type of protection EEx e EN / DIN VDE 0165, DIN VDE 0170/171 and PTB testing rules. PTB Test Report No /98 4/20 Siemens NS K 2000

20 SIRIUS 3R 3RB10 Solid-State Overload Relays CLASS 10 and CLASS 20 Description Time-current characteristics The time-current characteristics show the behavior at start with 3-pole loading : $ from cold state, % from warm state and & in the event of phase failure or current unbalance 40 % In the event of phase failure or current unbalance, the phase failure protection function becomes active. The overload relay trips after only 3 s. The characteristic curves of CLASS 10 and the behavior in operation are replicated from the 3RU overload relays. Trip classes of thermal, delayed magnetic or solid-state overload relays excerpt from IEC CLASS Tripping time t A in seconds at 7,2 x I e from cold state CLASS 10 A 2 < t A 10 CLASS 10 4 < t A 10 CLASS 20 6 < t A 20 CLASS 30 9 < t A 30 Time-current characteristic for CLASS 10 Time-current characteristic for CLASS 20 Circuit diagrams 3RB10 16 overload relays 3RB10 26 to 3RB10 46 overload relays Siemens NS K /21

21 3RB12 Solid-State Overload Relays CLASS 5 to CLASS 30 SIRIUS 3R Selection and ordering data 3RB12 Solid-State Overload Relays 3RB2 solid-state overload relays For trip classes 5/10/15/20/25/30, changeable Input T1/T2 for thermistor sensors (PTCs) for full motor protection Input C1/C2 for earth-fault detection with additional 3UL22 summation current transformer Manual/automatic/remote RESET Y1/Y2, test functions 2 outputs, 1 NO and 1 NC each 3 LEDs for operation and status displays Current setting range Rated control Mountable contactors Overload relays Weight supply voltage Order No. Price approx. A Type 1 unit kg 3RB12 solid-state overload relays 3RB ) to V to 120 V 50/60 Hz Installation as a single 3RB PG@@ 0,60 unit 220 V to 240 V 50/60 Hz 3RB PM@@ 24 V DC 3RB to V to 120 V 50/60 Hz Install. as a single unit 3RB QG@@ V to 240 V 50/60 Hz 3RB QM@@ 24 V DC 3RB12 25 to V to 120 V 50/60 Hz Install. as a single unit 3RB EG@@ V to 240 V 50/60 Hz 3RB EM@@ 24 V DC 3RB12 3RB to V to 120 V 50/60 Hz 3TF50 to 3TF52 3RB FG@@ V to 240 V 50/60 Hz 3RB FM@@ 24 V DC 3RB12 3RB to V to 120 V 50/60 Hz 3TF53 to 3TF57 3RB KG@@ V to 240 V 50/60 Hz 3RB KM@@ 24 V DC 3RB12 3RB to V to 120 V 50/60 Hz 3TF68. 3TF69 3RB LG@@ V to 240 V 50/60 Hz 3RB LM@@ 24 V DC 3RB12 Order No. supplement Standard version Design Order No. supplement Additional price 3RB @@ } Preferred type 1 NO + 1 NC 1 NO + 1 NC Overload/thermistor Earth-fault } RB Overload/thermistor/ Overload warning } 3RB earth-fault Version with internal earth-fault detection 2 ) Same as standard version, but additionally with internal earth-fault detection, for 3-conductor networks only, not for single-phase motors, but suitable for star-delta switching. 1 NO + 1 NC 1 NO + 1 NC Overload/thermistor Earth-fault 3RB Overload/thermistor/ Overload warning 3RB earth-fault Bistable version Same as standard version, but with the bistable output relay, no change in the switching state of the auxiliary contacts in the event of failure of the control supply voltage. 1 NO + 1 NC 1 NO + 1 NC Overload/thermistor Earth-fault 3RB Overload/thermistor/ Overload warning 3RB earth-fault 1) The setting range from 0.25 A to 1.25 A is obtained by multiple winding of the main conducting paths. 2) The internal earth-fault detection detects fault currents > 30% from the set current. 4/22 Siemens NS K 2000

22 SIRIUS 3R 3RB12 Solid-State Overload Relays CLASS 5 to CLASS 30 Selection and ordering data 3RB12 solid-state overload relays with analog output, same as standard version 3RB , but additionally with analog output signal 4 to 20 ma fot the motor current, referred to the set current value. For measuring instruments with 4 to 20 ma input or for processing in control systems, e.g. - moving coil indicator, front dimensions 96 mm x 96 mm, Order No. M01604-P changing scale 0 to 125 %, Order No. M01733-V0016-Z406. For other versions, see catalog MP12 B. Overload display up to 125 % of the set current (corresponds to 20 ma). Motor current = current setting corresponds to 16.8 ma = 100 %. Communication via ASi with analog module 3RK BQ00-0AA3 possible. Current setting range Rated Mountable contactors Overload relays Weight control supply voltage Order No. Price approx. A Type } Preferred type 1 unit kg 3RB12 solid-state overload relays with analog output 3RB ) up to V to 120 V 50/60 Hz Install. as a single unit } 3RB PG V to 240 V 50/60 Hz } 3RB PM40 24 V DC } 3RB PB up to V to 120 V 50/60 Hz Install. as a single unit } 3RB QG V to 240 V 50/60 Hz } 3RB QM40 24 V DC } 3RB QB40 25 up to V to 120 V 50/60 Hz Install. as a single unit } 3RB EG V to 240 V 50/60 Hz } 3RB EM40 24 V DC } 3RB EB40 3RB up to V to 120 V 50/60 Hz 3TF50 to 3TF52 } 3RB FG V to 240 V 50/60 Hz } 3RB FM40 24 V DC } 3RB FB40 3RB up to V to 120 V 50/60 Hz 3TF53 to 3TF57 } 3RB KG V to 240 V 50/60 Hz } 3RB KM40 24 V DC } 3RB KB40 3RB up to V to 120 V 50/60 Hz 3TF68. 3TF69 } 3RB LG V to 240 V 50/60 Hz } 3RB LM40 24 V DC } 3RB LB40 Accessories for 3RB12 overload relays Window size Rated fault current I n Order No. Price Weight mm A 1 unit kg Summation current transformer for external earth-fault detection UL A UL A 1 3UL A UL A UL A 1 3UL A UL A UL A 1 3UL A Direct voltage adapter For operation of a 3RB12 with the control supply voltage of 24 V DC at DC voltages from 30 V to 120 V 7PX A ) The setting range from 0.25 A to 1.25 A is obtained by multiple winding of the main conducting paths. Siemens NS K /23

23 3RB12 Solid-State Overload Relays CLASS 5 to CLASS 30 SIRIUS 3R Accessories Design For type Order No. Price Weight approx. Pack. 1 unit kg Unit Sealable cap 3RB A for current-setting knob and CLASS selector 3RB12 3RB A Push-in lugs 3RB B for screw mounting onto a mounting plate 2 items required per overload relays (1 set = 10 items). 3RB RB B Terminal cover 3TX A Terminal cover for installation as a single unit or load-side when directly mounted 3RB TX A RB TX A RB TX A with 3TF68 3RB12 62 with 3TF69 3TX A TX B Terminal cover between contactor and overload relay when directly mounted 3RB TX B RB TX B RB TX B with 3TF68 3RB12 62 with 3TF69 3TX B Base plate 3UF JA00 for snap-on mounting on 75 mm standard mounting rail 3RB UF JA /24 Siemens NS K 2000

24 SIRIUS 3R 3RB12 Solid-State Overload Relays CLASS 5 to CLASS 30 Technical data Tripping In case of overload, phase failure and current unbalance ( >40% of the current setting I e ) as well as with responding of the thermistor motor protection and in case of earth fault Trip class Selectable; CLASS 5, 10, 15, 20, 25, 30 PTB Test Report (increased safety EExe Nr.:) /96 Overload warning Above 1.15 x I e with balanced loading; above 0.85 x I e with unbalanced loading Operation Combined TEST/RESET button with functional test; automatic and remote RESET possible; rotary knob of current setting I e ; 6-step rotary switch for trip class (CLASS 5 to 30) Display green LED Ready Steady light ON; ready for operation OFF; no control supply voltage or functional test was negative (device is locked) red LED Overload Steady light Overload tripping by current and/or thermistor Flashing light Overload warning red LED Ground Fault Steady light Earth-fault Permissible ambient/storage temperature 25 C to +70 C/ 40 C to +80 C Mounting altitude to 2000 m above sea level Degree of protection (acc. to IEC 529) IP 20 ( 100 A max. setting current I e ); IP 00 (>100 A max. current setting I e ) Shock resistance (sine pulse) 15 g/11 ms Type of construction Compact, i. e. the current transformers for all sizes are already integrated in the housing Dimensions W x H x D Mounting position Fitting EMC immunity mm x mm x mm 3RB12 46 (I e 100 A): 70 x 85 x 132.5; 3RB12 53 (I e 205 A): 120 x 145 x 155; 3RB12 57 (I e 500 A): 145 x 160 x 175; 3RB12 62 (I e 820 A): 230 x175 x190 any 3RB12 46; snap-on mounting on 35-mm-standard mounting rail or screw mounting with accessories 3RB12 53; 3RB12 57; 3RB12 62: can be directly mounted on the contactor or screw mounting Conducted interference injection, burst acc. to IEC : 2 kv (corresponds to severity 3) Conducted interference injection, surge acc. to IEC : 2 kv (corresponds to severity 3) Electrostatic discharge acc. to IEC : 8 kv (corresponds to severity 3) Field-generated interference injection acc. to IEC : 10 V/m (corresponds to severity 3) EMC emitted interference Limit-value class B acc. to EN Main circuit Rated insulation voltage U i (pollution degree 3) Rated operational voltage U e Rated impulse withstand voltage U imp Rated frequency and type of current Short-circuit protection Diameter of the cut-outs ( 100 A max. I e ) with fuses with circuit-breaker 3RB12 46: 690 V for blank/unisolated conductors; 1000 V for isolated conductors 3RB12 53, 3RB12 57, 3RB12 62: 1000 V 3RB12 46: 690 V; 3RB12 53, 3RB12 57, 3RB12 62: 1000 V general 3RB12 46: 6 kv 3RB12 53, 3RB12 57, 3RB12 62: 8 kv 50/60 Hz; 3-phase and for protection of single-phase motors (see circuit diagrams) 1 ) 2 ) 10 mm (devices with max. current setting I e 25 A); 15 mm (devices with max. current setting I e 100 A ); (devices with max. current setting I e >100 A: mounting with connecting bars) Busbar connection (>100 A max. I e ) 3RB RB RB12 62 tightening torque Nm M 8: 10 to 14 M 10: 14 to 24 M 10: 14 to 24; M 12: 20 to 35 finely stranded with cable lug mm 2 35 to to to 240 stranded with cable lug mm 2 50 to to to 240 1) See table on page 4/27. 2) See Part 5. Siemens NS K /25

25 3RB12 Solid-State Overload Relays CLASS 5 to CLASS 30 SIRIUS 3R Technical data Auxiliary circuit/control circuit Auxiliary contacts (electrically isolated) Recovery time 1 NO/1 NC for overload tripping due to current and/or thermistor; 1 NO/1 NC for earth-fault tripping or 1 NO/1 NC for overload tripping due to current and/or thermistor and/or earth-fault : 1 NO/1 NC for overload warning 5 (fixed), after tripping due to overcurrent. After tripping by the thermistor as long as the motor temperature has not fallen to 5 K below the operating temperature of the thermistor. Rated insulation voltage U i 300 V (pollution degree 3) Rated impulse withstand voltage U imp 4 kv Conventional thermal current 6 A Rated operational current Switching capacity: AC-15: 6 A/24 V; 6 A/120 V; 3 A/230 V; DC-13: 2 A/24 V; 0.55 A/60 V; 0.25 A/125 V Rated control supply voltage U s AC 50/60 Hz: 110 V to 120 V; 220 V to 240 V; DC: 24 V Operating range AC 50/60 Hz: 0.85 to 1.1 x U s, 2 VA; DC 24 V: 0.85 to 1.2 x U s (DIN ), 2 W Power failure stored-energy time 200 ms Thermistor protection (PTC thermistor sensor) Summated cold resistance: 1.5 kω; Response value: 2.7 kω to 3.1 kω; fall-back value: 1.5 kω to 1.65 kω Response time after earth-fault detection External: 200 ms to 500 ms; internal: 500 ms to 1000 ms Short-circuit protection Fuse links utilization category gl/gg 6 A, fast 10 A; miniature circuit-breaker 1.6 A; C-characteristics Conductor cross-sections tightening torque 0.8 Nm to 1.2 Nm solid 1 x (0.5 mm 2 to 4.0 mm 2 ); 2 x (0.5 mm 2 to 2.5 mm 2 ) finely stranded with/without end sleeve 1 x (0.5 mm 2 to 2.5 mm 2 ); 2 x (0.5 mm 2 to 1.5 mm 2 ) Analog output Output signal 4 to 20 ma Measurement range 0 to 1.25 I e 4 ma 0 I e 16.8 ma 1.0 I e 20 ma 1.25 I e Resolution 10 bit (approx. 1/8 %) 4/26 Siemens NS K 2000

26 SIRIUS 3R 3RB12 Solid-State Overload Relays CLASS 5 to CLASS 30 Technical data Short-circuit protection with fuses for motor feeders for short-circuit currents up to 50 ka at 690 V for 3RB12 and 3UF50 Overload relays Contactor CLASS Fuse links 3) Current setting 5 and NH Type 3NA NH British U L -listed range Rated operational current I e DIAZED Type 5SB Type 3ND Standards fuses AC-3 in A at NEOZED Type 5SE fuses Utilization category gl (gg) am BS88 RK5 Type of coordination 4 ) Type T (Type) 400 V 500 V 690 V 400 V 500 V 690 V 400 V 500 V 690 V 400 V 500 V 690 V 400 V 500 V 690 V to 6.3 A 3RB1246-1P 3RT UF50 0 3RT RT to 25 A 3RB1246-1Q 3RT UF50 1 3RT RT RT RT RT RT RT to 100 A 3RB1246-1E 3RT UF50 3 3RT RT RT RT RT TF TF TF to 205 A 3RB1253-0F 3TF50 1 ) UF50 3 3TF51 2 ) TF52 2 ) TF TF TF TF to 500 A 3RB1257-0K 3TF UF50 4 3TF53 2 ) TF54 2 ) TF55 2 ) TF56 2 ) TF57 2 ) TF TF CLASS L 200 to 820 A 3RB1262-0L 3TF68 2 ) UF50 5 3TF69 2 ) CLASS L 1) Mounting of contactor is possible (after removing the box terminal block 2) Mounting of contactor is possible. 3) Observe the operational voltage. 4) Coordination and short-circuit equipment according to IEC /DIN VDE 660 Part 102 Type of coordination 1 : The contactor or starter must not endanger persons or the installation in the event of a short-circuit. They do not need to be suitable for further operation without repair and the renewal of parts. Type of coodination 2 : The contactor or starter must not endanger persons or the installation in the event of a short-circuit and must be suitable for further use. There is a danger of contact welding. Siemens NS K /27

27 3RB12 Solid-State Overload Relays CLASS 5 to CLASS 30 SIRIUS 3R Description Functions Tripping in the event of overload, current unbalance, phase failure or blocked rotor. Full motor protection by connection of a thermistor (PTC sensor circuit in the motor coil) possible; it is deactivated by the prefitted wire jumper A (see front view). The monitoring system of the termistor is fail-safe, i. e. a wire break causes tripping. Earth-fault monitoring - internal for motors with 3- lead connection (earth-fault detection in the event of fault currents > 30 % of the current setting I e ) - The units with internal earthfault detection are not suitable for operation in star/ delta combinations. - external for motors with 3 and 4-lead connection by connection of a 3UL A summation current transformer (reliable earth-fault detection in the event of fault currents of 0.3 A, 0.5 A and 1 A). These values are applicable for sinusoidal currents of 50/60 Hz Overload warning above I e with balanced load I e with unbalanced load - display by flashing overload LED at the unit or external via 1 NO/1 NC (according to the version of the unit) Electrically isolated auxiliary contact Function according to version: - 1 NO/1 NC for overload tripping by current and/or thermistor 1 NO/1 NC for earth-fault tripping - 1 NO/1 NC for overload tripping by current and/or thermistor and earth fault 1 NO/1 NC for overload warning Versions of the unit with monostable or bistable functioning of the output relays 3 LED displays ( Ready, Ground Fault, Overload ) Combined TEST-/RESETbutton with function test Remote and automatic RESET by means of external wiring is possible (an automatic RESET in the event of tripping by earth-fault has no effect) Selectable trip class (time-lag class): CLASS 5/10/15/20/25/ 30 Large ranges of the set current I e High tripping precision Current detection immune to harmonics Temperature range from 25 C to +70 C Self-monitoring, i.e. the units trips in the event of an internal fault Versions of the unit for control supply voltages of 24 V DC, 110 to 120 V AC, 220 to 240 V AC. Operation on frequency converters The 3RB12 solid-state relays are suitable for operation on frequency converters. 3RB12 overload relays with analog output With the aid of the microprocessor, the measured motor current is converted to an analog DC 4 ma to 20 ma output signal. The maximum current of the 3 phases is always output. An output signal of 20 ma corresponds to 1.25 times the set value. The current setting of the 3RB12 defines calculation of the absolute current value. With the output signal, moving coil instruments with a 4 ma to 20 ma input can be controlled (final scale value for all sizes 125 %) or analog inputs of programmable logic controllers can be fed. With an analog AS-Interface module (current), the current values can be transferred via AS-Interface. 3RB12 overload relays (front view) 1 Terminals for control supply voltage 2 Green LED Ready 3 Red LED Ground Fault 4 Red LED Overload 5 TEST-/RESET button 6 1 NO/1 NC for overload/ thermistor tripping or 1 NO/1 NC for overload/ thermistor/earth-fault tripping 7 Thermistor terminals 8 Terminals for external summation current transformer 9 Terminals for remote or automatic RESET 10 Rotary button for current setting 11 CLASS selector rotary knob 12 1 NO/1 NC for earth-fault tripping or 1 NO/1 NC for overload warning 13 Analog output ma PTB Test Report The 3RB12 solid-state overload relay complies with the specifications for the overload protection of flameproof motors of protection type increased safety EEx e EN / DIN VDE 0165, DIN VDE 0170/ 171 and PTB test regulations. For overload relays with DC operation, the electrical isolation must be assured by means of a battery supply or a safety transformer according to DIN VDE With 3RB units (no change of the switching state of the auxiliary contacts in the case of failure of the control suply voltage) for protection of EEx e electrical motors, separate monitoring of the control supply voltage is recommended. PTB Test Report No /96 Tripping characteristics The time-current characteristic for 3-pole symmetric loading shows the dependence of the tripping time from a cold state on multiples of the current setting. If the unit is pre-loaded with 100 % of the current setting, the tripping times are shortened to approx. 30 %. In the event of 2-pole loading (failure of a phase) or a current unbalance > 40 % of the current setting, the 2-pole characteristic applies. Time-current characteristic for 3-pole loading Time-current characteristic for 2-pole loading 4/28 Siemens NS K 2000

28 SIRIUS 3R 3RB12 Solid-State Overload Relays CLASS 5 to CLASS 30 Mode of operation and control The currently flowing motor current is detected in each phase via current transformers and continuously monitored by a microprocessor. If an overload > 110 % of the current I e occurs which is set with the rotary knob on the front of the unit, if there is a current unbalance > 40 % of I e or if a phase-failure occurs, tripping is initiated by the switching of two auxiliary contacts (1 NO/1 NC) after expiry of the tripping time which is set with the six-step rotary switch (CLASS 5/10/15/20/25/30 see tripping characteristics). Resetting, either by pressing the TEST/RESET button on the unit or by remote or automatic RESET, is possible after the recovery time of 5 min has elapsed. Tripping due to responding of the thermistor sensor occurs via the same auxiliary contacts but without a time delay. Here, resetting is not possible until the temperature in the motor coil has fallen to 5 K below the operating temperature of the thermistor. In the event of an earth-fault, the unit trips without a time delay. According to the version of the unit, this may happen via a separate output (1 NO/1 NC). Resetting of the unit is possible in this case without a time delay/ without elapsing of a recovery time. A test of the unit s functions, namely current detection, the thermistor and earth-fault input, and of the tripping functions of the auxiliary contacts can be initiated by pressing the TEST/RE- SET button. The test of the unit s functions can also be carried out during operation (LED signals). A self-monitoring feature also causes the unit to trip when an internal fault occurs. In this case resetting is not possible. Specifications IEC / DIN VDE 0660 Part 102; IEC / DIN VDE 0680 Part 200; IEC , -3, -4, -5; UL 508/CSA C Function in the event of control supply voltage failure Application Overload relays are used for protecting electrical equipment against overheating (3-phase motors, transformers,...). This can be caused by overloading, unbalanced current input, phase failure (main leads) or a blocked rotor. Solid-state overload relays provide highly-sophisticated motor-protection such as high precision of the tripping characteristic with a tolerance of < ±10 % fine adaptation to normal or heavy starting duty by means of an adjustable trip class (CLASS 5/10/15/20/25/30) independence from outside influence such as shocks, different cable cross-sections, temperature fluctuations, aggressive surroundings or ageing a defined recovery time (here 5min). Description In the case of a long-time failure of the control supply voltage (> 0.2 s), the output relays react in different ways depending on the version: monostable or bistable. Function of the output relays Monostable Bistable at: 3RB RB Failure of the control supply voltage Unit trips No change in the switching state of the auxiliary contacts Return of the control supply voltage without trip Return of the control supply voltage after trip Unit resets Mono- and bistable 3RB12 solid-state overload relays No change in the switching state of the auxiliary contacts Unit remains tripped Unit remains tripped Resetting: Resetting: In the event of overload tripping, In the event of overload tripping, after after 5 min; 5min; in the event of thermistor tripping in the event of thermistor tripping when when 5 K below the operating 5 K below the operating temperature; temperature; in the event of earth-fault in the event of earth-fault tripping, tripping, immediately immediately The 3RB12 electronic overload relays enable protection of electrical equipment and installations with three different protective mechanisms in one unit: overload protection with permanent monitoring of the individual currents in the motor leads thermistor motor protection with evaluation of a PTC thermistor sensor circuit earth-fault protection: internal In the event of a motor current between 0.3 times and twice the current setting, the unit trips at an earth-fault current that amounts to 30 % of the current setting. In the event of a motor current between twice and eight times the current setting, the unit trips at an earth-fault current that amounts to 15 % of the motor current. The response delay is 0.5 to 1s. external for motors with 3 and 4-lead connection by connection of a 3UL A summation current transformer (reliable earth-fault detection in the event of fault currents of 0.3 A, 0.5 A and 1 A). Thermistor protection (full motor protection) is provided by a PTC temperature sensor (e. g. for motors whose stator is the critical component, motors with long starting and breaking procedures, motors with impeded cooling or with high ambient temperatures). Additional evaluation equipment is not needed. Less space and wiring are therefore required. Siemens NS K /29

29 3RB12 Solid-State Overload Relays CLASS 5 to CLASS 30 SIRIUS 3R Description Design and mounting The current transformers for all sizes of the 3RB12 electronic overload relays are already integrated in the housing. Units with current setting ranges < 100 A (overall width 70 mm) are designed for single installation due to the push-through system used. With this system, the main power leads for rated motor currents of 1.25 A to 100 A are simply pushed through the current transformer integrated in the compact unit ( first loop ). Additional installation work and power losses at the transfer resistor of the terminal points which are otherwise needed are thus avoided. For rated motor currents I N smaller than 1.25 A, the motor leads in each phase can be taken through the loop-through holes several times (n times). The current setting I e of the unit can then be calculated to I e =n I N (e.g.: I N = 0.5 A; n = 3; I e = A = 1.5 A). n = 5 is recommended as the practical upper limit. Units with 70 mm overall width are either snapped onto a 35 mm standard mounting rail in accordance with EN or are screwed onto a mounting plate by means of push-in lugs which are available as accessories. For current setting ranges > 50 A to 820 A (overall width: 120 mm, 145 mm and 230 mm) the 3RB12 electronic overload relays can be directly mounted on the contactors via connecting rails. The screw mounting for these units is integrated in the housing. For 3RB12 53 units (overall width: 120 mm), a baseplate is also available for snap-on mounting on a 75-mm mounting rail. Internal circuit diagrams Connection diagrams 3RB12 overload relays standard version Protection of single-phase motors 3RB , ; (Only in the case of units without internal earth-fault detection) 3RB , RB , RB , ϑ ϑ 4/30 Siemens NS K 2000

30 3UA6 Thermally Delayed Overload Relays Overload relays for mounting onto contactor and installation as a single unit for snap-on and screw mounting snapping onto 35 mm stand. mounting rail acc. to EN UA6 Thermally Delayed Overload Relays Thermally delayed overload relays 3UA60, 3UA61 and 3UA62 STOP button Test function Integrated sealable cover SIRIUS 3RU19 accessories can be used Trip class CLASS 10 Auxiliary contacts 1 NO + 1 NC Manual/automatic RESET Switch position indicator Phase failure sensitivity up to 205 A CLASS 10 Selection and ordering data For contactor Overload relays Weight Current setting range Order No. approx. A } Preferred type kg 3TF50 55 to 80 } 3UA H to 90 } 3UA W 80 to 110 } 3UA X 90 to 120 } 3UA H 110 to 135 } 3UA J 3TF51 55 to 80 } 3UA H to 90 } 3UA W 80 to 110 } 3UA X 90 to 120 } 3UA H 110 to 135 } 3UA J 120 to150 } 3UA K 3TF52 55 to 80 } 3UA H to 90 } 3UA W 80 to 110 } 3UA X 90 to 120 } 3UA H 110 to 135 } 3UA J 120 to 150 } 3UA K 135 to ) } 3UA L 3TF to ) } 3UA N 0.7 1) From setting range 135 to 180 A, installation as a single unit is required (heat dissipation). Siemens NS K /31

31 3UA6 and 3RB12 Overload Relays up to 820 A CLASS 10 and 5 up to 30 s Selection and ordering data 3UA6 and 3RB12 Overload Relays Overload relays for installing as a single unit 3UA66 and 3UA68 overload relays with snap-on mounting onto 75 mm standard mounting rail acc. to EN RB12 overload relays for screw mounting or for direct mounting to the 3TF5 and 3TF6 contactors 3UA66 and 3UA68 overload relays with Current transformer Auxiliary contacts Trip class CLASS 10 A Manual/automatic RESET Switch position indicator Phase failure sensitivity 3RB12 solid-state overload relays with Current transformer Auxiliary contacts 2 NO + 2 NC Trip classes CLASS 5 to 30, changeable Manual/automatic/remote RESET Phase failure sensitivity Test functions and 3 LEDs Rated control supply voltage 50/60 Hz, 230 V See 3RB12 for further information and versions. Overload relays Weight Overload relays Weight Current setting range Order No. approx. Current setting range Order No. Price approx. A n Obsolescent type with replacement kg A } Preferred type kg type 80 to 125 3UA K to 205 } 3RB FM to 200 3UA B 50 to 205 } 3RB FM to 250 3UA C 125 to 500 } 3RB KM to 320 3UA D 125 to 500 } 3RB KM to 400 3UA E 125 to 500 } 3RB KM to 500 n 3UA F to 500 } 3RB KM to 630 n 3UA G 200 to 820 } 3RB LM /32 Siemens NS K 2000