ABB UniGear ZS1, Instruction Manual, Page: 45 / 67

46 ABB Power Distribution
6.2.2 Withdrawable metering parts
(Figures 3/1 and 3/11)
The handling of the withdrawable metering part in
the metering panel is as described in section 6.2.1,
without however the switching operations and
interlocking functions.
Withdrawable metering parts in incoming and
outgoing feeder panels are inserted into the cable
compartment using a ramp. They reach their service
position immediately and engage there in the panel
ground by means of the two locking pins at the
sides. The voltage transformers used correspond to
the type used in the metering panel, and therefore
HRC fuses can also be used along with the voltage
transformers.
6.2.3 Circuit-breaker
(Figure 6/5)
Charging the stored-energy spring system:
• On breakers with charging motors, charging is
carried out automatically. If the charging motor
should fail, the charging procedure can be
carried out or completed by hand.
• On breakers with manual charging systems,
door opened and withdrawable part in dis-
connected position, insert the charging lever
128 into the recess for charging lever and pump
for approx. 25 strokes until the charged
condition is indicated. When the charging
condition is reached, the charging mechanism is
automatically disengaged, and any further
strokes of the lever have no effect.
Meaning of the charging condition symbols:
Discharged Charged
Opening and closing the circuit-breaker:
• With the withdrawable part in the service
position, on and off switching operations should
only be carried out with the doors closed.
• Operate the local or remote electrical control.
• Observe the position indicator.
• The switching operation counter 13.5 for the
circuit-breaker is automatically incremented by
one unit with each operating cycle.
An additional control mechanism fitted in the door
of the circuit-breaker compartment enables
mechanical operation of the circuit-breaker with
the door closed and with the withdrawable part in
either position (figures 3/9 and 6/8):
• Press the relevant mechanical push-button,
previously turning knob 45.2 anti-clockwise to
the stop if the withdrawable part is in the service
position.
• Observe the position indicator.
Operating sequences:
Example 1: Circuit-breaker with manual charging mechanism
Operating sequence Result of operation Possible subsequent
(with panel door closed, Switch Charging switching operation
except for charging) position condition
Withdrawable part in test/
disconnected position, control
wiring plug inserted in socket –
Charging 0 On-Off
Move withdrawable part
into service position
Close breaker I Off
Open breaker 0 –
Move withdrawable part into
test/disconnected position
Test switching of the circuit-breaker without primary voltage can be carried out with the withdrawable part in the
test position (with the control wiring plug fitted).