Siemens SDV7-AR, Инструкция по эксплуатации

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38
De-energize the circuit breaker
Prior to performing any inspection or
maintenance checks, the circuit breaker must
be de-energized and grounded. Principal
steps are outlined below for information and
guidance.
Be sure that the circuit breaker and its
mechanism are disconnected from all electric
power, both high voltage and control voltage,
before it is inspected or repaired.
After the circuit breaker has been
disconnected (isolated) from power lines,
attach the grounding leads properly before
touching any of the circuit breaker parts.
De-energize the control power to the circuit
breaker.
For the type SDV7-SE circuit breaker with
stored-energy operator:
Review Figure 6: Relay and control and
operator compartments for type SDV7-SE-AR
circuit breaker with stored-energy operator on
page 19. If the circuit breaker includes the
optional capacitor trip unit, the capacitor
must be discharged by grounding its
terminals.
Perform the spring discharge check.
1. De-energize control power.
2. Press red open button on the operating
mechanism.
3. Press black close button on the operating
mechanism.
4. Again press red open button on the
operating mechanism.
5. Verify spring condition indicator shows
DISCHARGED.
6. Verify main contact status indicator shows
OPEN.
For the type SDV7-MA circuit breaker with
magnetic-actuator operator:
Review Figure 8: Relay and control and
operator compartments for type SDV7-MA-AR
circuit breaker with magnetic-actuator
operator on page 30.
Discharging capacitors
After control power has been removed,
discharge stored energy from the capacitors
(refer to Figure 7: Operator controls and
discharging capacitors on page 26).
1. Press red Open pushbutton (54.0).
2. Remove the mechanism housing cover
sheet (60.1).
NOTICE
Capacitor discharge plug (105.2)
Disconnect control power prior to removing or
replacing the capacitor discharge plug. Refer to
Figure 7 on page 26.
To discharge capacitors:
Disconnect control power to the circuit breaker
by opening the disconnect device (device 08 in
the typical schematic in Figure 10 on page 51)
located in the control compartment.
After control power is off, disconnect the
capacitor discharge plug (105.2) from the
controller board (105.0) to discharge capacitors.
To reconnect capacitors:
Disconnect control power to the circuit breaker
by opening the disconnect (device 08 in the
typical schematic in Figure 10 on page 51)
located in the control compartment.
Insert the capacitor discharge plug (105.2) (with
six pins) into the left-hand receptacle on the
controller board (105.0). Ensure that the plug is
properly seated and the plug position is level
with the power supply connection plug (105.5)
that is located to the right of the capacitor
discharge plug.
After the capacitor discharge plug is firmly
seated, reconnect control power to the circuit
breaker (device 08 in the typical schematic in
Figure 10 on page 51).
3. Discharge the capacitors (106.2) by
unplugging the connector (105.2) from
the controller board (105.0). Do not
unplug connector (106.3) from the
capacitor boards, or damage to the
capacitor board or to the controller board
may occur. The red LED (106.4) on each
of the capacitor boards (106.1) indicates
the state of charge of the capacitors
(106.2). When the capacitors (106.2) are
discharging, the red LEDs are flashing.
This indicates a hazardous voltage. When
the LEDs stop flashing, the capacitors
(106.2) are discharged.