34
MOU NTI NG A N D OPE R ATI ON M A N UA L
I N D O O R A I R S W I TC H - D I S CO N N EC TO R , N A L /N A L F/ V R
Allows opening command of switch-
disconnector to be enabled by remote control.
Shunt release is only available for stored spring
energy mechanism type A. It shall always be
connected in series with an auxiliary switch Fig.
53, (5% duty cycle solenoid) which disconnects
the shunt trip coil when the switch is open in
order to break a continuous operation command
which may also cause a dangerous situation when
closing.
7. Secure connection by locking ring with pin 3.
8. Insert a locking ring into the A-mechanism
pin to secure the perforated disk 5.
9. After installation, check the operation of the
shunt trip and its cooperation with the
mechanism. Turn the operating mechanism
shaft to a maximum angle of 60° clockwise
and tighten mounting screws 2 with 25 [Nm]
torque.
Mounting the shunt release Fig. 52
1. Turn the operating mechanism shaft to a
maximum angle of 60° clockwise.
2. Opening spring housing F, see Fig. 46, must
not be latched.
3. Return the shaft to its neutral position.
4. Install shunt release coil to the mechanism
using two bolts 2.
5. Insert the perforated disc into the
A-mechanism pin.
6. Connect the bar 3 to the perforated disc 4 in
such a way that it does not block the
mechanism and work properly.
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15.0 Mounting the shunt release
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52 Shunt trip parts component A-mechanism
1
2
2
3
4
4
5
5
