Grounded BØ Systems
Class 600
Circuit Breakers for Grounded B-Phase (BØ) (Corner-Grounded Delta) Systems
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3–Phase Corner-Grounded Delta System using 2-Pole Circuit Breakers |
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For use on 480 V systems, LH type circuit breakers must be ordered as 600 V versions and with a 5861 suffiix (i.e. LHL361005861).
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For use on 240 V systems, circuit breakers may be ordered as 480 V versions with a 5861 suffix (i.e. LHL341005861).
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LA type circuit breakers are not available with grounded B phase markings.
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Two-pole 240 V grounded B-phase circuit breakers (except EDB, EGB, EJB, QB, QD, QG, QJ, BD, BG, and BJ) will be built using three-pole modules.
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Two-pole grounded BØ circuit breakers will be labeled with 240 Vac interrupting ratings.
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No self-certification is available for interrupting ratings greater than shown in the tables below.
Application Data for 240 Vac 3Ø Corner-Grounded Delta System
|
Cat. No. Prefix |
Poles |
UL Listed Interrupting Rating |
|
|---|---|---|---|
|
Ampere Rating |
240 Vac Interrupting Rating |
||
|
QO-H, QOB-H |
2 |
15–100 A |
5 kA |
|
QB, QD, QG, QJ |
2 [1] |
70–250 A |
10 kA |
|
EDB, EGB, EJB |
2 [1] |
15–125 A |
18 kA, 35 kA, 65 kA |
|
BD, BG, BJ |
2 [1] |
15–125 A |
18 kA, 35 kA, 65 kA |
|
HD, HG |
2 [1] |
15–150 A |
42 kA |
|
HJ, HL |
2 [2] |
15–150 A |
65 kA, 100 kA |
|
JD, JG, JJ, JL |
2 [2] |
150–250 A |
42 kA, 65 kA, 100 kA |
|
LH, LHL |
2 [2] |
125–400 A |
30 kA |
|
MG, MJ Electronic Trip Unit |
300–800 A |
65 kA |
|
|
PG, PJ, PK, PL Electronic Trip Unit |
600–1200 A |
65 kA |
|
|
RG, RK Electronic Trip Unit |
1200–2500 A |
35 kA, 65 kA |
|
|
RJ Electronic Trip Unit |
1200–2500 A |
100 kA |
|
|
RL Electronic Trip Unit |
1200–2500 A |
100 kA |
|
|
3–Phase Corner-Grounded Delta System using 3-Pole Circuit Breaker |
noteThree-pole circuit breakers may be used on three-phase corner-grounded delta systems. The outside poles are to be connected to the ungrounded phase and the grounded conductor connected to the center pole. Connecting the circuit breaker in a manner other than that described or shown may result in an unsafe application of the circuit breaker. |
480 Vac 3Ø Corner-Grounded Delta System [4]
|
Cat. No. Prefix |
Poles [5] |
UL Listed Interrupting Rating [5] |
|
|---|---|---|---|
|
Ampere Rating |
480 Vac 3Ø Interrupting Rating |
||
|
HD, HG, HJ, HL |
3 |
15–150 A |
18 kA, 35 kA, 65 kA, 100 kA |
|
JD, JG, JJ, JL |
3 |
150–250 A |
|
|
LH, LHL |
3 |
125–400 A |
14 kA |
|
LD, LG, LJ, LL Electronic Trip Unit |
3 |
250–600 A |
18 kA, 35 kA, 65 kA, 100 kA |
|
MG, MJ Electronic Trip Unit |
3 [3] |
300–800 A |
35 kA |
|
PG, PK Electronic Trip Unit |
3 [3] |
600–1200 A |
35 kA, 50 kA |
|
PG, PK MicroLogic Trip Unit |
3 [3] |
250–1200 A |
|
|
PJ, PL Electronic Trip Unit |
3 [3] |
600–1200 A |
65 kA, 100 kA |
|
PJ, PL MicroLogic Trip Unit |
3 [3] |
250–1200 A |
|
|
RG, RJ, RK RL Electronic Trip Unit |
3 [3] |
1200–2500 A |
35 kA, 65 kA, 65 kA,100 kA |
|
RG, RJ, RK, RL MicroLogic Trip Unit |
3 [3] |
600–2500 A |
|
|
NT |
3 |
800–1200 A |
100 kA |
|
NW |
3 |
800–6000 A |
150 kA |