Siemens 3AH Anleitung Handbuch - Seite 23
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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.
A
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
31.5kA
40kA
4.76kV
40kA
4.76kV
50kA
50kA
8.25kV
40kA
40kA
1 5 kV
20kA
20kA
1 5kV
25kA
25kA
1 5kV
31.5kA
31.5kA
1 5kV
40kA
40kA
1 5kV
50kA
50kA
38kV
31.5kA
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
A
3
c
10
c
8
8
4
A
3
c
9
D
1 3
8
6
7
c
c
11
c
7
A
1
8
5
8
6
c
7
c
1 1
D
1 2
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