OPERATING CHARACTERISTICS

Size: px

Start display at page:

Download "OPERATING CHARACTERISTICS"

Prosper Rose
5 years ago
Views:

1 TEMBREAK 2 MOULDED CASE CIRCUIT BREAKERS 16A TO 630A 1. Welcome to TemBreak 2 2. Ratings and Specifications 3. Operating Characteristics Thermal Magnetic Protection 23 Thermal Magnetic Time / Current Characteristics 26 Electronic Protection 30 Electronic Time / Current Characteristics 34 Letthrough Peak Current Characteristics 37 Letthrough Energy Characteristics Application Data 5. Accessories 6. Installation 7. Dimensions TEMBREAK MOULDED CASE CIRCUIT BREAKERS 630A TO 1600A 8. TemBreak Moulded Case Circuit Breakers 9. Order Codes The Ultimate Safety Breaker page 22

THERMAL MAGNETIC PROTECTION TemBreak 2 MCCBs from 125A frame to 400A frame are available with thermal magnetic protection units.

Thermal Magnetic trip units are especially suited to the following applications: Installations where harmonic distortion of current waveforms is likely.

3 Pole MCCB with Adjustable Thermal and Adjustable Magnetic Characteristics Single Pole MCCB with Fixed Characteristics Models with Adjustable Thermal and Adjustable Magnetic Characteristics All

2 THERMAL MAGNETIC PROTECTION TemBreak 2 MCCBs from 125A frame to 400A frame are available with thermal magnetic protection units. Refer to Section 9 for details of TemBreak thermal magnetic MCCBs up to 800A. Thermal Magnetic trip units are especially suited to the following applications: Installations where harmonic distortion of current waveforms is likely. They operate inherently on the root mean square (rms) heating effect of current. DC circuits. Refer to Section 4, The Application of MCCBs in DC Systems for more information. 3 Pole MCCB with Adjustable Thermal and Adjustable Magnetic Characteristics Single Pole MCCB with Fixed Characteristics Models with Adjustable Thermal and Adjustable Magnetic Characteristics All standard 3 pole and 4 pole TemBreak 2 thermal magnetic models have adjustable thermal and adjustable magnetic characteristics. Traditionally, thermal magnetic MCCBs have had adjustable thermal with fixed magnetic characteristics. The fixed magnetic element can limit the application of the MCCB. An adjustable magnetic characteristic allows shortcircuit protection to be matched to the load and supply characteristics, for example motor inrush currents or generator shortcircuit currents. Lowering the shortcircuit tripping threshold can allow a higher earthloop impedance in an installation and provide endofcable protection with the correct disconnection times. page 23 The Ultimate Safety Breaker

3 THERMAL MAGNETIC PROTECTION Adjustment Dials (xi n ) (xi n ) 1. I R is the thermal element adjustment dial and is used to set the rated current to match the conductor rating. I R can be set between 0.63 and 1.0 times I n. 2. I i is the magnetic element adjustment dial and is used to set the short circuit tripping threshold to suit the application. I i can be set between 6 and 12 times I n on 125A and 400A frame models. I i can be set between 6 and 13 times I n on 250A frame models with ratings of 160A, 200A and 250A. I i can be set between 6 and 12 times I n on 250A frame models with ratings of 125A and less. Models, Types and Rated Currents of Thermal Elements Model Type Current Rating I n (A) S125 NF 16, 20, 25, 32, 40, 50, 63, 80, 100, 125 E125 NJ 20, 32, 50, 63, 100, 125 S125 NJ 20, 32, 50, 63, 100, 125 S125 GJ 20, 32, 50, 63, 100, 125 H125 NJ 20, 32, 50, 63, 100, 125 L125 NJ 20, 32, 50, 63, 100, 125 S160 NF 16, 20, 25, 32, 40, 50, 63, 80, 100, 125, 160 S160 NJ 20, 32, 50, 63, 100, 125, 160 S160 GJ 50, 63, 100, 125, 160 H160 NJ 160 L160 NJ 160 E250 NJ 20, 32, 50, 63, 100, 125, 160, 200, 250 S250 NJ 160, 200, 250 S250 GJ 160, 200, 250 H250 NJ 160, 250 L250 NJ 160, 250 E400 NJ 250, 400 S400 CJ 250, 400 S400 NJ 250, 400 S400 GJ 250, 400 H400 NJ 250, 400 L400 NJ 250, 400 The Ultimate Safety Breaker page 24

4 THERMAL MAGNETIC PROTECTION Single Pole MCCBs Single pole models have fixed thermal and fixed magnetic characteristics. Generator Protection Generators may need specially modified protection characteristics, based on their shortcircuit capability. If a generator is capable of delivering shortcircuit current greater than six times its full load current, a standard TemBreak 2 thermal magnetic MCCB may be used, with I i set at less than the available shortcircuit current. (Note that MCCBs, with fixed magnetic characteristics may not be suitable for this application.) A thermal magnetic MCCB with low instantaneous protection may be used where the generator shortcircuit current is less than six times its full load current. These are modified versions of the standard MCCB. Refer to Section 10 for order codes for MCCBs with low instantaneous protection. Four pole MCCBs with low instantaneous protection have protection on the neutral pole as standard. The magnetic characteristic of MCCBs with low instantaneous protection is fixed at the following values: Model E125 S125 S160 E250 S250 E400 S400 Magnetic Trip Current 3xI n 3xI n 3xI n 3xI n 3xI n 3.5xI n 3.5xI n Neutral Pole Protection Neutral pole protection is available as an optional extra on four pole thermal magnetic MCCBs. The thermal and magnetic elements in the neutral pole are related to those in the phase poles as follows: Phase Trip Threshold Neutral Trip Threshold Thermal I r (adjustable) I N (adjustable)= I n Magnetic I i (adjustable) I i (adjustable) Please contact Terasaki for order codes of models with neutral pole protection. Motor Protection MCCBs feeding motors are often only required to provide protection from shortcircuits. Overload protection is provided by a dedicated thermal or electronic overload relay. Tembreak 2 MCCBs without thermal protection elements are available for this application. Refer to section 10 for order codes for MCCBs with Magnetic Trip Only. Four pole MCCBs with magnetic trip only have protection on the neutral pole as standard. page 25 The Ultimate Safety Breaker

5 THERMAL MAGNETIC CHARACTERISTICS Single Pole MCCBs The Ultimate Safety Breaker page 26

6 THERMAL MAGNETIC CHARACTERISTICS 125A Frame MCCBs page 27 The Ultimate Safety Breaker

7 THERMAL MAGNETIC CHARACTERISTICS 160A and 250A Frames FOR PLUGIN, 225A 2925±585A The Ultimate Safety Breaker page 28

8 THERMAL MAGNETIC CHARACTERISTICS 400A Frame page 29 The Ultimate Safety Breaker

ELECTRONIC PROTECTION TemBreak 2 MCCBs from 250A frame to 630A frame are available with electronic protection units. Current ratings, In, of 40A, 125A, 250A, 400A and 630A are available.

9 ELECTRONIC PROTECTION TemBreak 2 MCCBs from 250A frame to 630A frame are available with electronic protection units. Current ratings, In, of 40A, 125A, 250A, 400A and 630A are available. These offer great flexibility as their characteristics can be set to suit a wide range of application conditions. Overload protection can be set between 0.4 and 1.0 times In. Terasaki offer one of the most adaptable protection units on the market: If you require a characteristic which is not available as a preset on our standard electronic protection unit, send us the details and we will program a customised characteristic to your specification.* Selecting a Preset Characteristic for a 400A TemBreak 2 MCCB with Electronic Protection Every TemBreak 2 electronic protection unit includes overload protection (L), delayed shortcircuit protection (S) and instantaneous protection (I) as standard. Electronic Protection Characteristic *Characteristic is programmable within certain limits. Contact us for details. The Ultimate Safety Breaker page 30

10 ELECTRONIC PROTECTION Optional Functions Three optional functions are available: Ground Fault Trip (G) This function trips the MCCB after time delay, tg, if the ground fault current exceeds the preset threshold, Ig. Ground fault protection can be enabled and disabled by operating a DIP switch on the electronic protection unit. An external current transformer is available if the ground fault trip function is required on a 3 pole MCCB, in a 3 phase, 4 wire system. Refer to Section 7 for dimensions and to Section 10 for order codes. Neutral Protection (N) Neutral protection trips the MCCB after time delay, t N, if current in the neutral conductor exceeds the rated current, In, of the MCCB. The time delay characteristic is identical to that of the overload characteristic (L). Preferential Trip Alarm (P) An LED and voltfree output contact are activated after a time delay, tp, if the load current exceeds the preset threshold, Ip. A power supply is required for operation of the preferential trip alarm. This is connected through a terminal block which is mounted as shown below, either on the side of the breaker (250A, 400A, 630A standard), or remotely (400A, 630A oly on request). Ratings, specifications and wiring arrangements are shown below. Dimensions of terminal blocks for preferential trip alarm can be found in Section 7. Note that the breaker mounted terminal block is not compatible with the Terminal Block for FrontConnected and RearConnected MCCBs described in Section 5, if the latter is mounted on the right side of the breaker. Control Power Supply Specifications Frame (A) /630 Voltage V AC V AC Rated Power 2VA 2VA Rated Current of Output Contact Frame (A) / V AC, resistive load 3A 3A 125V AC, inductive load 2A 2A 250V AC, resistive load 3A 3A 250V AC, inductive load 2A 2A 30V DC, resistive load 2A 2A 30V DC, inductive load 2A 2A page 31 The Ultimate Safety Breaker

11 ELECTRONIC PROTECTION A A. Connection Arrangement for Prefferential Trip Alarm with Breaker Mounted Terminal Block (Standard). MCCB Protection Relay Terminal Block for preferrentisl Trip Alarm, Breaker Mounted Control Power Supply Terminals Connections from Terminal Block to Protection Relay, PreWired Output Contact Cables, PreWired B B. Connection Arrangement for Prefferential Trip Alarm with Remotely Mounted Terminal Block (On Request). How to Specify Optional Functions Optional functions must be specified at the time of order. Descriptions for electronic MCCBs include a 14 digit alphabetic code after the type designation which details the combination of optional functions. For example: S400GE APG 3P 400A FC includes preferential trip and ground fault trip. The table below lists codes for all the optional functions currently available: Optional Function I n 250 Poles 3 Code AP Ground Fault (G) Neutral Protection (N) Preferential Trip Alarm (P) 4 AP AN APN AP AG APG 4 AP AN APN AGN APGN AP AG APG 4 AP AN APN AGN APGN Available Not Available The Ultimate Safety Breaker page 32

12 ELECTRONIC PROTECTION Adjustment Dials The left adjustment dial sets the rated current to match the conductor rating. The right adjustment dial selects one of seven preset characteristics on 250A and 400A models, and one of six preset characteristics on 630A models. The effects of the left adjustment dial (labelled I R(A)), and the right adjustment dial (labelled Characteristics) are detailed in the tables shown underneath each time / current graph. Tolerances of Characteristics Characteristics Long Time Delay Short Time Delay Tolerance t R ± 20% I sd ± 15% Instantaneous tsd Ii Total clearing time +50ms, resettable time 20ms ± 20% Preferential Trip Alarm I p ± 10% t p ± 10% Ground Fault Trip Neutral Protection Ig tg IN ± 15% Total clearing time +50ms, resettable time 20ms ± 15% page 33 The Ultimate Safety Breaker

13 ELECTRONIC CHARACTERISTICS S250NE, S250GE, S250PE, H250NE In = 250A; 125A; 40A Standard Option I R (A) LTD Pickup current I R xin LT ST INST PTA NP Characteristics t R Isd tsd Ii Ip tp IN tn No at 200% x I R at 600% x I R xi R xir 14(Max: 13 x I n) Note (1) xi R xin 1.0 Note (2) tn = tr Note (1) Ii max. = 13 x In. (2) Standard setting of IN is 100% of In. For any other setting please specify when ordering. Characteristic of neutral protection (t N vs. IN) is identical to characteristic of phase protection (tr vs. IR). The Ultimate Safety Breaker page 34

14 ELECTRONIC CHARACTERISTICS S400NE, S400GE, H400NE, L400NE In = 400A; 250A IR (A) LTD Pickup current IR xin Standard Option LT ST INST PTA GF* NP Characteristics t R I sd tsd Ii Ip tp Ig tg IN tn No at 200% x I R at 600% x IR xir xi R 14(Max: 13 x I n) Note (1) xir xi n xin Note(2) t N=tR page 35 Note (1) I i max. = 13 x I n. (2) Standard setting of I N is 100% of I n. For any other setting please specify when ordering. Characteristic of neutral protection (tn vs. IN) is identical to characteristic of phase protection (tr vs. IR). *Not available when In is 250A The Ultimate Safety Breaker

15 ELECTRONIC CHARACTERISTICS E630NE, S630CE, S630GE 3 Tripping Time second minute hour T I R I p t R t p I g I sd tsd t g I i I Percent rated current In Percent Rated Current I R In = 630A IR (A) LTD Pickup current IR xin Standard Option LT ST INST PTA GF NP Characteristics t R Isd tsd Ii Ip tp I g tg IN t N No at 200% x I R at 600% x IR xir xir 14(Max: 10 x I n) Note (1) xir xin xin Note(2) t N=tR Note (1) Ii max. = 10 x I n. (2) Standard setting of I N is 100% of I n. For any other setting please specify when ordering. Characteristic of neutral protection (t N vs. IN) is identical to characteristic of phase protection (tr vs. IR). The Ultimate Safety Breaker page 36

16 LETTHROUGH PEAK CURRENT CHARACTERISTICS S125NF. 240V AC S160NF. 240V AC. E125NJ, S125NJ, S125GJ. 440V AC. S125NJ, S125GJ. 690V AC. page 37 The Ultimate Safety Breaker

17 LETTHROUGH PEAK CURRENT CHARACTERISTICS H125NJ, L125NJ. 440V AC. H125NJ, L125NJ. 690V AC S160NJ, S160GJ, E250NJ, S250NJ, S250GJ. 440V AC. S160NJ, S160GJ, S250NJ, S250GJ. 690V AC. The Ultimate Safety Breaker page 38

18 LETTHROUGH PEAK CURRENT CHARACTERISTICS H160NJ, L160NJ, S250NE, S250GE, S250PE, H250NJ, H250NE, L250NJ. 440V AC. H160NJ, L160NJ, S250NE, S250GE, S250PE, H250NJ, H250NE, L250NJ. 690V AC. c S250NE up to 36kA/380415V, 25kA/440V S250GE up to 65kA/380415V, 50kA/440V S250NE, S250GE up to 7.5kA E400NJ, S400CJ, S400NJ, S400NE, S400GJ, S400GE, 415V AC. S400CJ, S400NJ, S400NE, S400GJ, S400GE, 690V AC. page 39 The Ultimate Safety Breaker

19 LETTHROUGH PEAK CURRENT CHARACTERISTICS H400NJ, H400NE, L400NJ, L400NE. 415V AC. E630NE, S630CE, S630GE. 415V AC Max. Letthrough peak current(ka) E630NE, S630CE, S630GE. 690V AC Max. Letthrough peak current(ka) The Ultimate Safety Breaker page 40

20 LETTHROUGH ENERGY CHARACTERISTICS S125NF. 240V AC S160NF. 240V AC 1 240VAC E125NJ, S125NJ, S125GJ. 440V AC. S125NJ, S125GJ. 690V AC. page 41 The Ultimate Safety Breaker

21 LETTHROUGH ENERGY CHARACTERISTICS H125NJ, L125NJ. 440V AC. H125NJ, L125NJ. 690V AC S160NJ, S160GJ, E250NJ, S250NJ, S250GJ. 440V AC. S160NJ, S160GJ, S250NJ, S250GJ. 690V AC. The Ultimate Safety Breaker page 42

22 LETTHROUGH ENERGY CHARACTERISTICS H160NJ, L160NJ, S250NE, S250GE, S250PE, H250NE, H250NJ, L250NJ. 440V AC. H160NJ, L160NJ,S250NE, S250GE, S250PE, H250 NE, H250NJ, L250NJ. 690V AC. S250NE, S250GE upto 7.5kA S250NE up to 36kA/380415V, 25kA/440V S250GE up to 65kA/380415V, 50kA/440V E400NJ, S400CJ, S400NJ, S400NE, S400GJ, S400GE. 415V AC. S400CJ, S400NJ, S400NE, S400GJ, S400GE. 690V AC. page 43 The Ultimate Safety Breaker

23 LETTHROUGH ENERGY CHARACTERISTICS H400NJ, H400NE, L400NJ, L400NE. 415V AC. E630NE, S630CE, S630GE. 415V AC. E630NE, S630CE, S630GE. 690V AC. The Ultimate Safety Breaker page 44

24 SYMMETRICAL DOOR CUTOUT PATTERNS Door cutout patterns for external operating handles are symmetrical, even when breakers are mounted in opposite directions. Using TemBreak 2 Operating Handles Using other MCCB Operating Handles 3

The Ultimate Safety Breaker

The Ultimate Safety Breaker OUR CUSTOMER CARE COMMITMENTS Quality is Guaranteed All products supplied from this catalogue carry a guarantee against defects in materials and workmanship for a period of