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78
5 Operations on vacuum circuit breaker
Fig. 58
5.2
Spring charging
Manual
When the springs are discharged (yellow signal) fully insert the handle in the suitable mechanical
graft and turn it clockwise until the springs charged signal appears (red signal).
Maximum force which can be applied does not have to exceed 100Nm.
Electrical
When the spring charging motor is connected to the suitable power supply, it automatically
begins to charge the springs; at the end of the operation the red signal appears in the window and
a limit switch disconnects the power supply to the spring charging motor.
If you keep on supplying the circuit, the springs will be charged after every circuitbreaker closing
operation, predisposing the device to make a complete O-C-O cycle.
If the electrical charging is interrupted (for example in case of black-out) complete manual
charging before closing the circuitbreaker.
Springs charged indicator
Discharged Charged
Summary of Contents for QMT Series
Page 1: ...Y4419D 01GF 18W12 QMT Manuale installatore Installation manual ...
Page 2: ...2 IT UK ITALIANO 3 ENGLISH 45 QMT ...
Page 15: ...Quadri Media Tensione QMT Manuale installatore 15 Tipo 2 Tipo 3 Tipo 4 ...
Page 44: ......
Page 57: ...Medium voltage switchgear QMT 57 Installation manual Type 2 Type 3 Type 4 ...
Page 86: ...86 Notes ...
Page 87: ...87 ...