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WL Circuit Breaker selection and application guide
Low Voltage Circuit Breaker
Accessories
Neutral current sensor – 4-wire residual
For 4-wire residual ground fault protection we offer neutral
current sensors with or without bus bar coupling. The sensors are
comparable to the sensors used within the breaker and connected
to the ETU. This sensor must also be wired to the ETU through
designated secondary disconnects on the breaker.
Without copper bus adapters:
3” max bus bar width order part number WLNCT2
3 - 5” bus bar width order part number WLNCT3
With copper bus adapters:
3” max bus bar width order part number WLNCT2CB
3 - 5” bus bar width order part number WLNCT3CB
Neutral current sensor – direct sensing or
modified differential
For direct measurement of ground source current between the
transformer neutral point to ground select the Direct Ground
Sensor. For measurement between each phase and neutral of
specific breakers select the Modified Differential GF Sensor. The
sensors are compatible to the sensors used within the breaker
and connections to the ETU. Sensors must also be wired to the
ETU through designated secondary disconnects on the breaker.
Modified differential GF:
Frame size 2 breakers 1200:1 ratio, order part number
WLGMDGFCT2
Frame size 3 breakers 1200:1 ratio, order part number
WLGMDGFCT3
Direct ground sensing:
Frame size 1, 2 and 3 breakers 1200:1 ratio, order part
number WLGNMDGCT23
Breaker door cover
A transparent hinged door cover is available to isolate
any physical access to the breakers controls. Provision for
padlocking included. Fits frame size 2 and 3 breakers.
Order part number WLPGC
Door sealing frame
To seal openings around the door cutout of the breaker, this
rubber escutcheon is available. Order part number WLDSF
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