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Ground fault module
The ground fault module (GFM) is used to detect current
flowing through the grounding conductors which may present
a hazardous condition. The module can be field added to an
ETU745 or higher model as an upgrade but can’t be removed
once installed. Residual sensing by phase vector summation or
direct sensing can be selected on the module or via the setup
of the ETU776. Ground fault modules may be ordered as
alarm only or as alarm and trip. Alarm will provide a visual and
communication notification. Alarm and trip model will trip the
breaker in addition to alarm notification.
Key lock-out
To lock the WL breaker in the “Open” position an optional key-
lock can be installed on the breaker. The key cylinder and lock-out
assembly is mounted on the breaker and accessible via a knock-
out on the breaker front cover, after installation is complete. The
key is removable only when the breaker is locked open. Keys can
be ordered as keyed-alike for a Superior or Kirk key cylinder type.
If a custom key is required, order the key lock provision only.
Lock must be obtained by others.
Operation counter
For monitoring the number of breaker operations (open and
close) a numerical operations counter is available. This counter
is only suitable for breakers equipped with the spring-charging
motor option. The counter mounts to the motor assembly and
will register manual and electrical breaker operations. Counter
is non-resettable up to 100,000 operations. Counter ships with
available pre-service operations for field setting
to zero.
WL Circuit Breaker selection and application guide
Low Voltage Circuit Breaker
Breaker accessories and options
Auxiliary contacts
Auxiliary contacts can be used to provide interlocking control
or remote indication of the breakers main contact position (open
or closed breaker). The Normally Open (NO) contacts are open
when the breakers main contacts are open. The Normally Closed
(NC) contacts are closed when the breakers main contacts are
open. The contacts are wired individually to the secondary
disconnects for user connectivity. See breaker wiring diagram
for supply terminal locations.
Breaker status sensor (BSS)
BSS is an integrated circuit device that measures the internal
breaker temperature, monitors breaker main contact position
(open or closed), bell alarm status, shunt trip status, breaker
ready-to-close and closing spring charged status. All status
conditions and information is transmitted through the CubicleBus
network as real-time data. A Com16 (Modbus), COM15 (PROFIBUS)
or a BDA (breaker display adapter) accessory must be used to
export the BSS CubicleBus data to external computer or monitoring
equipment. Only one sensor per breaker is available. See breaker
wiring diagram for supply terminal locations.
Characteristics table
Available Contact Configurations 2NO and 2NC or 4NO and 4NC
AC Operation Voltage 240VAC 50/60Hz
Continuous Current 10A
Making Current 30A
Breaking Current 3A
DC Operation Voltage 24, 125, 250VDC
Continuous Current 5A
Making Current 1.1A @ 24 or 125VDC, .55A @250VDC
Breaking Current 1.1A @ 24 or 125VDC, .55A @250VDC
Characteristics table
Operating Voltage 24VDC
Peak Inrush Current 110mA
Max. Continuous Current 40mA
Ambient Operation Temperature -25 to 70C
Breaker mounted options
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