Spring Charging Handle Lock; Rating Plugs; Ready-To-Close Contact; Shunt Trip - Siemens ETU745 Application Manual

WL Circuit Breaker
Factory Installed Options

Spring charging handle lock

An optional padlock provision to prevent manual charging of the
closing springs can be installed on the breaker front cover. This
provision does not prevent electric charging of the closing springs
and the breaker can be mechanically closed if the closing spring
is charged prior to padlocking the charging handle. One padlock
may be used with a latch diameter of 3/8 inch maximum (padlock
by others).

Rating plugs

The rating plug is required to limit the downstream load current.
Use of a rating plug that exceeds the breaker frame rating will
result in a trip unit error and will trip the breaker automatically.
Rating plugs are field interchangeable.

Ready-to-close contact

In addition to the standard "ready-to-close" visual indicator on
the WL breaker, an optional contact can be added to remotely
monitor the ready-to-close conditions. Closing is ready if all of
the following conditions are true:
• closing spring-charged
• breaker main contacts are open
• mechanical lock-outs disabled
• racking handle seated in stored position
• electrical lock-outs disabled
Characteristics table
Ready-to- Voltage
close Continuous current
contact Making current
Breaking current
WL Circuit Breaker Selection and Application Guide
Courtesy of NationalSwitchgear.com
1
125-240VAC, 125 -250VDC
3A
.4A @24-125VDC, 5A @120-240VAC
.2A @24-125VDC, 3A @120-240VAC

Shunt trip

The shunt trip opens the circuit breaker instantly when energized
by a remote power source. An auxiliary contact is wired in series
with the shunt trip to remove the current from the coil after the
breaker is opened. Two shunt trip coils may be installed in a
breaker if dual supply sources or control circuits are required.
An optional status contact may be selected with the second shunt
trip to provide a signaling condition that the shunt trip has been
activated. Status contact not available with communication option.
Status condition is sent via communication instead of contact.
Characteristics table
Trip coil 120VAC range
AC operation 240VAC range
Power consumption 120W for 50ms (5% duty cycle)
Min. closing time
Trip coil 24VDC range
DC operation 48VDC range
125VDC range
250VDC range
Power consumption 120W for 50ms (5% duty cycle)
Min. closing time

Shunt trip (continuous duty)

The continuous duty shunt trip is available for 100% duty cycle
and can hold the WL breaker open during an electrical or manual
"close breaker" attempt (i.e. lock-out). The continuous duty trip
may be used in conjunction with a standard shunt trip solenoid
for dual control. Not available for use with UL1066 Listed breakers.
Characteristics table
Shunt trip 120 - 240 VAC range
(interlock 24 - 250VDC range
coil) Power consumption
Min. shunt trip actuation
Opening time of breaker
Smallest fuse protection rating
1 See page 85 for field install part numbers.
104 - 127VAC
208 - 254VAC
50ms from point of signal
14 - 28VDC
28 - 56VDC
70 - 140VDC
140 - 280DVC
50ms from point of signal
85 - 110% of nominal
70 - 126% or nominal
15W / 15VA
60 ms
80 ms
1A
17