34
Hazardous voltage and high-speed moving parts.
Will cause death, serious injury and property damage.
Do not bypass interlocks or otherwise make interlocks inoperative.
Interlocks must be in operation at all times.
Read instruction manuals, observe safety instructions and use qualified
personnel.
Capacitor charging check
Before conducting the capacitor charging
check, discharge the capacitors first (refer to
Fast discharge of capacitors (page 6) and
automatic capacitor charging (page 9)).
Then plug the connector (105.2) to the
controller board (105.0), and switch on the
control power disconnect device in the relay
and control compartment. Observe the LEDs
(105.1) at the front panel (109.0).
Primary tasks of this check are:
1. De-energize the control power source.
2. Unplug connector (105.2) to fast-
discharge the capacitors.
3. After fast discharge is complete, plug in
connector (105.2).
4. Energize the control power source. The
capacitors should charge automatically.
When the capacitors are fully discharged
and control power is then applied, the red
LED lights, and the green LED lights after
approximately 30-35 seconds. The red LED
is off when the green LED lights.
If the capacitors have been fully discharged
for a very long time, charging time may be
significantly longer than indicated. If
capacitor charging time is much longer than
expected on initial energization, refer to
“Capacitor charging after very long de-
energization” on page 40 of the
“Maintenance” section of this instruction
manual.
Electrical close and trip check (control
power required)
A check of the circuit breaker control circuits
should be performed. This check is made
with the control circuit of the circuit breaker
energized.
1. Once the capacitors are charged (106.2),
operate the circuit breaker electrical
close command (via Close pushbutton).
Verify by both the sound of the circuit
breaker closing and by the main contact
status indicator that the circuit breaker
contacts are closed.
2. As soon as the circuit breaker has closed,
the capacitors (106.2) will recharge
automatically. This charging process is
indicated by the LEDs (105.1) on the
front panel. The capacitors retain
sufficient charge for an opening
operation while recharging is occurring.
3. After a satisfactory close operation is
verified, operate the circuit breaker
electrical open (or trip) command (via
Open pushbutton, control switch or
equivalent means). Verify by both the
sound of the circuit breaker opening and
by the main contact status indicator that
the circuit breaker contacts are open.
4. After a satisfactory open operation is
verified and the green LED lights, apply
an electrical close signal and maintain
the close signal. The circuit breaker
should close, the capacitors (106.2)
should recharge and the circuit breaker
should not attempt to close again. The
circuit breaker should not close again
until the first close signal is removed
and a second close signal is applied.
NOTICE
Capacitor discharge plug (105.2)
Disconnect control power prior to
removing or replacing the
capacitor discharge plug. Refer to
Figure 2 on page 7.
To discharge capacitors:
Disconnect control power to
the circuit breaker by opening
the disconnect device (device
08 in the typical schematic in
Figure 14 on page 24) 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
14 on page 24) 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 14
on page 24).
