NXAirS Withdrawable Metal-enclosed Switchgear, Rated Voltage Up to 12kV
21
Operation of NXAirS
13.8 Charging the spring manually
When the auxiliary voltage source is switched on, the spring will store energy automatically. Indicator
for energy storage of spring will change to indicate “spring with energy” from “spring without energy”
When control voltage is interrupted, closing spring of circuit breaker cannot store energy automatically,
and only manual energy storage is available, then circuit breaker could be operated.
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SION module is in switch panel completely and interlock is applied.
Indicator for energy storage of spring
Drawing 13:
Indicator for energy storage of spring “spring without energy”
Drawing 14:
Indicator for energy storage of spring “spring with energy”
Preconditions
Drawing 15.
Operating hole for manual energy storage of closing spring
Danger!
The sudden race rotation of the handle will result in hurt to persons. When use the handle for
energy storage of spring, pay attention to prevent the race rotation of the handle, for when the
control voltage is connected again (motor rotation), the return rotation of the handle will hurt
persons.
During manual energy storage of spring, please use the specific handle among fittings and
operate it slowly, in order to prevent it from race rotation!
Turn the interlock movable door of the operating pole to sides through the nut.
Insert the handle on the operating shaft.
Rotate the handle clockwise about 25 turns, till the indicator of the glass window dis
plays “spring with energy”.
√
After the operation of energy storage finished, the closing energy is stored in the spring.
The indicator for energy storage of spring changes to “spring with energy” from “spring
without energy”.
Take out the handle.