Siemens 3AH 지침, 설치, 작동, 유지보수 - 페이지 15

{카테고리_이름} Siemens 3AH에 대한 지침, 설치, 작동, 유지보수을 온라인으로 검색하거나 PDF를 다운로드하세요. Siemens 3AH 33 페이지. Vacuum circuit breaker operator module
Siemens 3AH에 대해서도 마찬가지입니다: 설치 운영 및 유지보수 (20 페이지), 사용 설명서 (38 페이지)

페이지 인쇄

1. Maintenance and Troubleshooting

Interrupter/Operator Description

Shock Absorber

Type 3AH circuit breakers are equipped with a sealed, oil-

filled, viscous damper, or shock absorber (61.8) Figure 6.

The purpose of this shock absorber is to limit overtravel

and rebound of the vacuum interrupter movable contacts

during the conclusion of an opening operation. The shock

absorber action affects only the end of an opening opera-

tion.

Auxiliary Switch

Figure 6 shows the breaker mounted auxiliary switch. This

switch provides auxiliary contacts for control of circuit

breaker closing and tripping functions. Contacts are avail-

able for use in relaying and external logic circuits. This

switch is driven by linkages connected to the jack shaft.

The auxiliary switch contains both 'b' (Normally Closed)

and 'a' (Normally Open) contacts. When the circuit breaker

is open, the 'b' switches are closed and the 'a' switches are

open.

Figure 10. Latch Details (shown charged)

Figure 11. Undervoltage Block/Operate Selection

Figure 12. Capacitor Trip Device