Operating Sequence; Operating Frequency - WEG VBWC Serie Instrucciones De Instalación

9.3 OPERATING SEQUENCE

The sequence of operating mechanism is as follows.
Control power source "ON"
Closing Spring Charging Time
Motor
Closing spring
Opening spring
Closing coil
Opening coil
Circuit break

9.4 OPERATING FREQUENCY

In order to keep the operating mechanism parts or components at the best service condition, please avoid any
unnecessary operation and also attend the followings.
„ Make a successive operation 10 operations with the minimum time interval (about 5sec.) required for
charging the closing spring.
(The 30 min. of time interval should be required at least after a successive operation);
„ Operate 20 times per an hour;
„ Operate 100 times per a day.
In case of requiring frequent switching operation or any severe operating duty under the dusty and polluted
environment, it needs to be added the frequency of periodic inspection or maintenance.
Closing operation started
Closing signal
(within 5sec.)
ON
OFF
Charging
Discharging
Charging
Discharging
ON
OFF
ON
OFF
ON
OFF
Figure 9.5: Operating Sequence
Closing operation completed
Closing time Opening time
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Opening signal
Opening operation
started
Opening
Operation
completed
Vacuum Circuit Breaker | 19