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IE
D
C
L
O
S
E
C
M
D
T
rip
C
B
5
2a
C
B
R
E
A
D
Y
BR
SC
ST
SRY
To test
set
+
-
ANSI04000202-1-en.vsd
BI
BI
ANSI04000202 V2 EN
Figure 18:
Simulating the CB operation by a bi-stable relay/breaker simulator and
manual switches
The following manual switches are used:
•
Switch or push-button to close (SC)
•
Switch or push-button to trip (ST)
•
Switch for CB ready condition (SRY)
If no bi-stable relay or breaker simulator is available, replace it with two self-reset
auxiliary relays and use a self-holding connection.
1MRK 505 293-UUS A
Section 6
Testing functionality
107
Commissioning manual