Cast iron resistors Data sheet general

Transcription

1 Cast iron resistors general Application Cast iron resistors are used in drive engineering in combination with motor starters or contactor controls for the starting and stepping of the three-phase slip-ring rotor or three-phase motors. They can also be applied as slip, series or load resistors. Cast iron resistors are characterized by high overload capacity and are mainly used for short-term or intermittent operation. Systems Nearly all standard cast iron resitor systems used on the European market are available also spares for superseded models from AEG, BBC, ABB and others. All systems supplied by Siemens to date are completely available. For new units, only the systems GINO and Siemens 3PR3.. should be used. Insulation The rated insulation voltage is 1500V AC/1800V DC at a pollution degree 3 pursuant to VDE Resistance to climatic changes Cast iron resistors are resistant to climatic changes pursuant to DIN T1 and suited for indoor and outdoor installation at varying conditions of condensation, without protection against weathering at low pollution impact. The admissible ambient temperature ranges from -25 to +45 C and the admissible altitude for installation is of up to 1000 m above sea level. At higher temperatures or higher altitudes, the load rating and/or the rated voltage must be reduced as a function of the operating mode KB/AB/DB or the installation altitude. s and standards The units comply with the applicable specifications of VDE regulations VDE 0100 and VDE They conform with the EEC ow Voltage Directive of 19 February Protection classes Pursuant to DIN /IEC 144 IP00, IP10, IP13, IP20, are available depending on the system in question. Operating modes KB Short-term operation, with subsequent cooling down AB Intermittent operation with regular On/Off time t a /t r, indicated as duty factor in %. ta d. f. 100 [%] ta tr DB Continuous operation E

2 System description Cast iron with and without reinforcement, mounted on insulated support brackets Elements contacted at the head by means of screw-type connections, direct parallel switching of possible Connections can be moved retroactively Designs Open banks for installation, free support bracket ends, protection class IP 00 Open banks with longitudinal rail for inserting into housing, protection class IP 00 Banks with side panels, open, prot. IP00 Housed resistors, protection IP20 and Housed resistors, protection IP20 and Special designs with cable box, metallurgical plant design Surface protection Base coat and synthetic resin top coat RA 32 light gray, alternatively hot-dip galv., w/o painting. The number of in the units depends on the requirements. This allows for an optimum customized design that cannot be obtained with standard banks. After selection of the as a function of the ohm value and load, the required size is selected depending on the required no. of. GINO offers the dimensioning of the units as a free service. To this effect, only the technical data of the intended application are needed: Examples for applications and data needed: Braking resistors for frequency converter drives Ohm value, intermediate circuit voltage, braking capacity, duration and frequency Resistors for slip-ring conductors: Motor rating, rotor standstill voltage, nominal rotor current. of resistor: Slip resistor: Slip at nominal load [%] Starter resistor: starting load factor, starting frequency and duration, type of machine, where required, load and inertia moment, speed Control resistor: ike starter resistor, additionally speed reduction and torque curve of the machine. Crane resistor: type of drive (hoisting/driving), switchgear. Technical data of the cast iron system GINO Description Element No. Resistance value Cold Hot Admissible current at duty factor in % Cycle time 120 s Currenttime integral 100% 60% 40% 25% 15% 5% I²t [ka²s] GWE GWE GWE GWE GWE GWE GWE GWE GWE GWE GWE GWE GWE GWE GWE The load values are mean values for a final temperature rise of ca. 400 C. They apply for resistors in housings. The values in the table are valid for the thermal equilibrium reached after ca. 20 minutes intermittent or continuous operation. To optimally adjust the units to the intended application, the number of installed will follow the requirements based on ohm values, loads and duty factor. For short-term operation, a larger load value can be calculated in view of the heat storage capacity. For operation times >= 3 s, the current-time integral indicated in the table (i²t) can be used as a basis for load calculation. Example: Short-term operation oad 590 A 10 s i²t = 0.59² x 10 = 3.48 ka²s Selection: element GWE 45 E

3 Resistor banks IP00 Free support bracket ends Dim. Kg 0/ GWP / GWP / GWP G00021M10.TCW max. 236 With support rail max. 416 Dim. Kg 0/ GWP / GWP / GWP G00021M11.TCW 35 max. 236 With bracket for wall mounting GWG GWG GWG G00021M12.TCW Resistors in small housings Protection class IP20: wall mounting Protection class : upright mounting Ø10, GWP GWP GWP B00021M E

4 Protection IP00: Bank with side panels Protection IP20: Housing with perforated sheet cover, bottom open Protection : Housing with louvered sheet and roof, bottom open Size Dim Housed resistors individual housings Protection 1/ IP10 GWG / IP20 GWG / GWG / IP10 GWG / IP20 GWG / GWG / IP10 GWG / IP20 GWG / GWG Roof, at Perforated plate at IP Housed resistors 2 stacked boxes Protection 2/ x 24 IP10 GWG / IP20 GWG / GWG / x 36 IP10 GWG / IP20 GWG / GWG / x 48 IP10 GWG / IP20 GWG / GWG IP00,IP Housed resistors 3 stacked boxes Protection 3/ x 24 IP10 GWG / IP20 GWG / GWG / x 36 IP10 GWG / IP20 GWG / GWG / x 48 IP10 GWG / IP20 GWG / GWG Housed resistors, metallurgical plant design 1 to 3 stacked boxes Protection 1/369.22H 1 x 48 GWG / H 2 x 48 GWG / H 3 x 48 GWG G00021M /369.22H 2/369.22H 3/369.22H E

5 Item Description DK No. 1 Support rails 1.1 Plug-in support rail, complete GWM Plug-in rail, complete GWM Screw rail, complete GWM003 2 Resistor element GWE Support bracket 3.1 M14x4 for size GWM M14x620 for size GWM M14x7 for size GWM006 4 Insulating tube 4.1 aminated paper size GWM aminated paper size GWM aminated paper size GWM Mica paper size GWM Mica paper size GWM Mica paper size GWM012 5 Mica disc mm GWM mm GWM039 6 aminated paper disc GWZ030 7 Insulator for phase separation GWZ024 8 Sheet washer for item (2x erf.) GWZ026 9 Connecting plates for 2, copper GWZ for 2, galvanized steel GWZ for 3, copper GWZ for 3, galvanized steel GWZ for 4, copper GWZ for 4, galvanized steel GWZ for 5, copper GWZ for 5, galvanized steel GWZ for 6, copper GWZ for 6, galvanized steel GWZ013 Item Description DK No. 10 Cap screw for connecting plate, - NSZ DIN 912-M6x10 11 Terminals 11.1 Terminal M8 right GWZ Terminal M8 left GWZ Terminal M12 right GWZ Terminal M12 left GWZ Double terminals 12.1 Double terminal M GWZ Double terminal M GWZ Cap screw for connection, DIN 912-M6x15 - NSZ Insulator for bearing rail GWZ Plain washer 35 x 14.2 x GWZ Hexagonal screw - NSS DIN933-M8 x Hexagonal screw - NSS DIN933-M12 x Hexagonal nut - NMS DIN 934-M Hexagonal nut - NMS DIN 934-M Serrated lock washer - NSF DIN 6798-A Serrated lock washer - NSF DIN 6798-A Plain washer DIN 125-A NSS Plain washer DIN 125-A 13 - NSS Hexagonal nut - NMS DIN 934-M14 21 Spring washer DIN 137-B14 - NSF G00021M Ø9 1.2 Ø left right double terminals Connecting plates E