Product Line:
NT and NW Masterpact breaker
Resolution:
Table 41: T-Frame Circuit Breakers
External neutral sensor for 3-phase, 4-wire residual ground fault system (or for neutral current monitoring).
These neutral sensors include their wiring harness. To order this harness as a spare part, order cat. no. NCTWIRING.
External neutral sensor for circuit breakers with standard neutral protection
External neutral sensor for circuit breakers with oversized neutral protection♦
♦Oversized neutral protection = 1.6xIr where Ir = long time pick-up.
Table 42: W/Y-Frame Circuit Breakers
External neutral sensor for 3-phase, 4-wire residual ground fault system (or for neutral current monitoring) and external sensor for Modified Differential Ground Fault (MDGF) or Source Ground Return (SGR) system.
These neutral sensors include their wiring harness. To order this harness as a spare part, order cat. no. NCTWIRING.
•Kit includes qty. (2) neutral sensors.
►Four MDGF sensors (phase + 1 neutral) are required for W-frame; eight MDGF sensors are required for Y-frame. For SGR system, only one sensor (neutral) is required for W-frame; two sensors for Y-Frame.
An MDGF/SGR ground fault interface module (Cat. no. S48891) is also required for each circuit breaker.
♦Oversized neutral protection = 1.6xIr where Ir = long time pick-up.
NT and NW Masterpact breaker
Resolution:
Table 41: T-Frame Circuit Breakers
External neutral sensor for 3-phase, 4-wire residual ground fault system (or for neutral current monitoring).
These neutral sensors include their wiring harness. To order this harness as a spare part, order cat. no. NCTWIRING.
| NT Circuit Breaker Sensor Plug | External Neutral Sensor for general use | External Neutral Sensor Square D Panelboard | External Neutral Sensor for use in Square D Switchboards |
| 100–250 A | S33575 | S33924 | S33926 |
| 400–1600 A | S33576 | S33925 | S33927 |
| 100 A | S33575 | S33924 | S33926 |
| 250 A | N/A | N/A | N/A |
| 400–1000 A | S33576 | S33925 | S33927 |
| 1200/1250 A | S48896 | N/A | NA |
| 1600 A | S48182 | N/A | NA |
Table 42: W/Y-Frame Circuit Breakers
External neutral sensor for 3-phase, 4-wire residual ground fault system (or for neutral current monitoring) and external sensor for Modified Differential Ground Fault (MDGF) or Source Ground Return (SGR) system.
These neutral sensors include their wiring harness. To order this harness as a spare part, order cat. no. NCTWIRING.
| Frame Size | Sensor Plug (A) | External Neutral Sensor | PZ4 External Neutral Sensor (For use in PZ4 Switchgear) | MDGF/ SGR Sensor► | ||
| For Residual Ground Fault | For 3-Pole Circuit Breaker with Oversize Neutral Protection♦ | For Residual Ground Fault | For 3-Pole Circuit Breaker with Oversize Neutral Protection♦ | |||
| W | 100 | S48916 | S48916 | S48902 | S48902 | |
| 250 | N/A | N/A | ||||
| 400 | S34036 | S34036 | S48903 | S48903 | S33579 | |
| 600/630 | ||||||
| 800 | ||||||
| 1000 | ||||||
| 1200/1250 | S48896 | |||||
| 1600 | S48182 | N/A | ||||
| 2000 | S48896 | |||||
| 2500 | S48182 | S48182 | ||||
| 3000 | N/A | |||||
| 3200 | ||||||
| 4000 | N/A | |||||
| Y | 2000 | S48897• | S48897• | S48898• | S48898• | S33579 |
| 2500 | ||||||
| 3000 | N/A | |||||
| 3200 | ||||||
| 4000 | ||||||
| 5000 | N/A | S48897• | ||||
| 6000 | ||||||
| 6300 | N/A | |||||
►Four MDGF sensors (phase + 1 neutral) are required for W-frame; eight MDGF sensors are required for Y-frame. For SGR system, only one sensor (neutral) is required for W-frame; two sensors for Y-Frame.
An MDGF/SGR ground fault interface module (Cat. no. S48891) is also required for each circuit breaker.
♦Oversized neutral protection = 1.6xIr where Ir = long time pick-up.
Released for:Schneider Electric Australia
