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What are the neutral current transformers used for ground fault sensing NT and NW Masterpact breakers?

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 (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
  External neutral sensor for circuit breakers with standard neutral protection
100–250 A S33575 S33924 S33926
400–1600 A S33576 S33925 S33927
  External neutral sensor for circuit breakers with oversized neutral protection♦
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
♦Oversized neutral protection = 1.6 Ir 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 (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
•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.
        A MDGF/SGR ground-fault interface module (Cat. no. S48891) is also required for each circuit breaker. 
♦Oversized neutral protection = 1.6 Ir where Ir = long time pick-up.


See catalog 0613PL0001 for more Masterpact parts
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