WL Circuit Breaker
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WL Selection and Application Guide • 2005
Circuit Breaker Accessories
Auxiliary Release
Up to two auxiliary releases can
be installed at the same time.
The following combinations are
available:
• 1 shunt trip
• 1 undervoltage trip
• 2 shunt trips
• 1 shunt trip and
1 undervoltage trip
Shunt Trips
The shunt trip opens the circuit
breaker when the working
voltage is applied. The shunt trip
is available in 5% duty cycle and
provides 40 ms clearing time.
Interlock Shunt Trip
A unique accessory for the WL,
it serves as a standard shunt trip
to open a closed breaker when
the coil is energized. In addition,
if the coil is energized with the
breaker open, it acts as an
interlock or lockout device to
prevent the breaker from
closing. It is rated for 100%
continuous duty energization.
This device should not be used
for remote ground fault tripping.
Undervoltage Release
The undervoltage release opens
the circuit breaker when the
working voltage falls below a
specific value. The circuit breaker
cannot be closed manually or by
means of an electrical close
command if the rated voltage is
not applied to the undervoltage
release. The undervoltage
release is without time delay as
standard and the customer
can switch between t
d
>80 ms
and t
d
<200 ms.
An additional version is
available; undervoltage release
with 0.2 to 3.2 s delay.
Signal Contact for Auxiliary
Release
One signal contact per auxiliary
release is available to interro-
gate the switching positions of
the auxiliary release. These are
not available when
communications is installed.
Closing Solenoid
Serves to electrically close the
circuit breaker by means of a
local electrical “CLOSE” button
or remote signal.
Motorized Operating
Mechanism
For automatic charging of the
stored energy mechanism.
It is switched on when the
stored energy mechanism is
released and the control voltage
is available. It automatically
switches off after charging.
The springs can still be charged
manually if required.
Lock Kit (WLLKKT)
The lock kit is required when the
operation of the mechanical
CLOSE and OPEN buttons needs
to be adapted to special
demands of the switchgear
operation by retrofitting various
accessories (e.g. locks, access
lock-outs preventing tool
operation, seals).
Motor Switch
Knob operated switch for
turning off the motorized
operating mechanism.
Operations Counter
(WLNUMCNT)
A 5-digit operating cycle counter
is available with the motor
operator.
Resetting the Manual Trip
Signal
If the circuit breaker has been
tripped, this is indicated by the
protruding red RESET button on
the ETU. Actuation of the RESET
button resets the trip solenoid
and the trip signal. If this
manual indicator is to be
remotely reset, the option is
available to equip the RESET
button with a reset solenoid.
With this option, the circuit
breaker trip indicator can be
reset both manually and
electrically.
Automatic Reset of the
Reclosing Lockout
With the optional reclosing
lock-out (WLNOAUTRSET), if the
breaker is tripped the circuit
breaker cannot be reclosed until
the trip indicator has been either
electrically or manually reset.
With the standard “automatic
reset of the reclosing lockout”,
the circuit breaker is ready-to-
close immediately after a trip.
The reset of the manual trip
indicator is not required.
Remote Trip Signal Switch
(WLRTK)
Consists of a secondary
maglatch and signal switch
disconnect. It is used to remotely
trip and lock out the breaker.
It is not available for fused
breakers. It is actuated by
applying a 24V DC pulse for
0.5 sec.
Ready-to-Close Signal Contact
(WLRTCS)
WL Circuit Breakers are equipped
with a visual ready-to-close front
panel indicator as standard. The
option to transmit this readiness
to close over a signal contact is
also available. If the circuit
breaker is operated through
communication, this signal
switch is fitted as standard.
Locking devices
Locking Device in OPEN
Position, Front Panel Mounted
(WLLKOFFKRK, WLLKOFFSUP,
WLLKNP)
This function prevents closing of
the circuit breaker. This lock only
actuates on this circuit breaker.
Locking Device
for “Mechanical CLOSE”
(included in the WLLKKT
Lock Kit)
Prevents unauthorized
mechanical closing. The
mechanical CLOSE button
can only be actuated if the key is
inserted (key operation). Closing
through the “electrical CLOSE” or
remote closing are still possible.
Locking Device in OPEN
Position, Mounted through
the Cubicle Door
(WLDLKRK, WLDLPR, WLDLSUP,
WLDLDKRK, WLDLDPR,
WLDLSUP)
This special function for drawout
circuit breakers prevents closing,
independent of the circuit
breaker. Unauthorized closing is
also not possible after circuit
breaker replacement.
WL_SA_intro-sec1.qxd 2/7/05 1:26 PM Page 49
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