ABB SGR-51 Manual - Página 5
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L
.
41
-
668.1
E
NORMAL INDICATIONS
COMPONENTS
CHECKED
TEST POINT
CIRCUIT
AFTER
RESET
BEFORE RESET
Z
4
,
R 36
20
V
±
1.0 V
20
V
±
1.0 V
Reset Board
Terminal 1
Circuit Board
Supply Voltage
Reset Circuit Bd
.
Q
2
,
Q
3
,
C
2
,
C 3
,
R
37
,
D 3
,
D 4
Slow
Voltage
Rise to
Approx
.
15 Volts
Approx
.
1 V
Approx
.
1.4 V
Junction of
RIO
and C 2
Timing
Circuit
C 4
,
Q
4
,
Q
5
Approx
.
15
V
Junction of
R
14 and R 18
Junction of
R 16 and R 21
Junction of
R 26
and D 6
Junction of
Q
9 and D 7
Flip
-
Flop
Control
Circuit
Approx
.
Approx
.
15
V
1 V
Approx
.
Close
Relay
Circuit
Approx
.
Q 7
8 V
0 V
Q
8 , Q 9 , D 7
Approx
.
20
V
Approx
.
0
V
All
measurements
made between indicated
points
and d
-
c
negative
.
5