Siemens 3AH 사용 설명서 - 페이지 23

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1. Table of Contents

Maintenance

Electrical Control Checks

The electrical controls of the circuit breaker should be

checked d u ring inspections to verify a bsence of a ny me

cha nical damage, and proper operation of the a utomatic

spring charging a n d Close a n d Trip circ u its.

Unless otherwise noted, all of these tests a re performed

without a ny control power applied to the circ u it breaker.

Check of the Wiring and Terminals

1. Physically check all of the circuit breaker wiri ng for evi

dence of abrasion, cuts, burning or mechanical damage.

2. Check a l l terminals to be certain they are solidly attached

to their respective device.

Hazardous voltages and high-speed

mechanical parts.

Will cause death, severe personal injury, or

property damage.

De-energize before working on this equ ipment.

Read instruction m a n u a ls, observe safety in

structions and limit use to qualified perso nnel.

Automatic Spring Charging Check

(Control Power Required)

Repeat the automatic spring charging check described in

the section entitled Installation Checks a n d I n itial Functional

Tests.

WARNIN G

Table 3. Typical Vacuum Interrupter Contact Life Expectancy

Rated Max. Interrupting

Rated

Voltage

Class

Current

4.76kV

25DMVA

36kA

4.76kV

35DMVA

49kA

8.25kV

5DOMVA

41 kA

1 5kV

5DDMVA

23kA

1 5kV

750MVA

36kA

1 5kV

10DOMVA

48kA

38kV

1 5DDMVA

35kA

4.76kV

31.5kA

40kA

4.76kV

40kA

4.76kV

50kA

8.25kV

40kA

1 5 kV

20kA

1 5kV

25kA

1 5kV

31.5kA

1 5kV

40kA

1 5kV

50kA

38kV

31.5kA

Primary tasks o f this check are:

1.The circuit breaker is energ ized with control power for this

check.

2. E nergize th e control power source.

3. When control power is connected to the circuit breaker,

the closing spring should automatical ly cha rge. Visually

verify that the closing spring is charged.

N ote: A temporary source of control power and test leads

may be requ ired if the control power source has not been

connected to the switchg ear. Wh en control power is con

n ected to the circuit breaker, the closing spring should

automatically charge.

Curve Number

1 3

1 1

1 2