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産業機器 Siemens 3AHのPDF 取扱説明書、インストール、操作、メンテナンスをオンラインで閲覧またはダウンロードできます。Siemens 3AH 33 ページ。 Vacuum circuit breaker operator module
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1. Maintenance and Troubleshooting

Interrupter/Operator Description

Elementary Diagram

Figure 8. Typical Elementary Diagram

Rapid Auto-Reclosing

Since the closing spring is automatically recharged by the

motor operating mechanism when the breaker has closed

the operating mechanism is capable of an open-close-open

duty cycle as required for rapid auto-reclosing.

Manual Operation

Electrically operated vacuum circuit breakers can be oper-

ated manually if the control supply should fail.

Manually Charging the Closing Spring (Figure 6).

Insert the hand crank (50) in hole (50.1) and turn it clock-

wise (about 45 revolutions) until the indicator (55) shows

"Charged". The hand crank is coupled with the charging

mechanism via an over-running coupling; thus the opera-

tor is not exposed to any risk should the control supply

recover during charging.

Manual Closing (Figure 6)

Press the close button (53). The close-open indicator (58)

will then display "Closed" and the closing spring condi-

tion indicator will now read "Discharged".

Manual Opening (Figure 6)

The tripping spring is charged during closing. To open the

breaker, press the trip button (54) and "Open" will be dis-

played by indicator (58).

Indirect Releases (Dual Trip or Undervoltage)

The indirect release provides for the conversion of mod-

est control signals into powerful mechanical energy im-

pulses. It is primarily used to trip medium voltage circuit

breakers while functioning as a secondary (dual trip) re-

lease or undervoltage release device.

These releases are mechanical energy storage devices.

Their internal springs are charged as a consequence of

the breaker mechanism operation, This energy is released

upon application or removal (as appropriate) of applicable

control voltages. Refer to Figures 9, 10 and 11.

Secondary (Shunt) Release

A secondary shunt releases (extra trip coil) is used for elec-

trical tripping of the circuit breaker by protective relays or

manual control devices when more than one trip coil is

required. The second trip coil is generally connected to a

separate auxiliary supply (DC or AC) from the control sup-

ply used for the normal trip coil.