ABB OVB-SDB, Инструкция по эксплуатации

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2.0 DESIGN
The circuit breaker type OVB-SDB is a three pole vacuum circuit breaker and designed in
a column type construction with either “spring stored energy operating mechanism” or
“Magnetic Actuator mechanism”, mounted beneath the middle part. It consists of, (Refer
Fig.2 & 3, page no. 51 & 52)
Three interrupting chambers – Fi
Three supporting insulator-Vi
Support structure – Vs
Control cabinet with spring stored energy mechanism – Ms
Foundation bolt – Fb.
Current transformer mounting structure – Ct.
2.1 Breaker Pole
The breaker pole consists of (ref. Fig. 4, page no. 53)
Insulator body - 10001 & 10002
Vacuum interrupter - 10204
Lamellar contact - 10003
Current collecting hub - 10203
Upper and lower terminal - 10009 & 10010
Insulating Rod - 10100
Sealing bellow - 10006
Poles are filled with SF
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or Nitrogen gas individually at a pressure of 1.2 bar (abs).
3.0 FUNCTION
The typical schematic circuit diagram of the breaker shown in Fig.5, page no. 54. The
control circuit can also be referred in the order related engineering drawings.
3.1 Switching operations
As supplied from ABB Limited, Nasik the circuit breaker will be in open position and
closing spring in discharged condition. In case of spring charged mechanism, when
the control supply is given to the breaker, closing spring will get charged
automatically by means of spring charging motor. In case of magnetic actuator, when
the control supply is given to the breaker, the capacitor will get charged
automatically by means of the electrical circuits.