Siemens ETU745, Инструкция по применению, Страница: 19 / 124

17 WL Circuit Breaker Selection and Application Guide
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See page 85 for field install part numbers.
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).
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
WL Circuit Breaker
Factory Installed Options
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Characteristics table
Trip coil 120VAC range 104 - 127VAC
AC operation 240VAC range 208 - 254VAC
Power consumption 120W for 50ms (5% duty cycle)
Min. closing time 50ms from point of signal
Trip coil 24VDC range 14 - 28VDC
DC operation 48VDC range 28 - 56VDC
125VDC range 70 - 140VDC
250VDC range 140 - 280DVC
Power consumption 120W for 50ms (5% duty cycle)
Min. closing time 50ms from point of signal
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.
Shunt trip 120 - 240 VAC range 85 - 110% of nominal
(interlock 24 - 250VDC range 70 - 126% or nominal
coil) Power consumption 15W / 15VA
Min. shunt trip actuation 60 ms
Opening time of breaker 80 ms
Smallest fuse protection rating 1A
Characteristics table
Ready-to- Voltage 125-240VAC, 125 -250VDC
close Continuous current 3A
contact Making current .4A @24-125VDC, 5A @120-240VAC
Breaking current .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.
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.
Characteristics table
Courtesy of NationalSwitchgear.com