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I.L. 41-496.52D
R-2 Adjustment
Use No. 2 test connections of Figure 9. Set V
volts and V
= V
= 0 volts. Set I
AN
BN
75° lagging V
. (Modify voltage and current settings
BN
for the .2 - 4.35 ohm relay as above). Measure the
voltage between R
and L
B
ometer for a minimum ("null" reading" and lock R2 in
place.
R3 Adjustment
Use No. 3 test connections of Figure 9. Set V
volts and V
= V
= 0 volts. I
AN
BN
ging V
. (Modify voltage and current for the .2 - 4.35
CN
ohm relay as above).
Measure the voltage between R
Adjust R3 potentiometer for a minimum ("null" read-
ing) and lock R3 in place.
R4 Adjustment
Remove jumper from relay terminals 5 and 6. Use
the No. 4 test connections of Figure 7. Connect all "L"
and "R" leads back to previous setting, except R
lead. Set V
= 0 and V
CN
2.34 amp. 75° lagging V
set V
= 0 and V
CN
BN
amperes). Measure the voltage between R
lowest M0 tap marked "0".
Adjust the R4 potentiometer for minimum voltage
("null" reading) and lock R4 in place.
Part D M Taps Check
Use a Rectox-Type Voltmeter.
Open all "R" and "L" leads.
For 1 - 30 ohm Relay
M
Taps — Use test connection No. 1 of Figure 9.
A
Pass 10 amp. current through the relay.
The voltages should read as follows:.
1.5 (±0.2) volts between 0 tap and .03 tap.
6.0 (±0.6) volts between 0 tap and .09 tap
9.0 (±1.0) volts between0 tap and .06 tap
M
Taps — Use test connection No. 2 and repeat
B
above.
20
BN
= 5.08 amps.
B
leads. Adjust R2 potenti-
B
CN
= 5.08 amp. 75° lag-
C
and L
leads.
C
C
= V
= 70 volts. Set I
AN
BN
. (For the .2 to 4.35 relay
CN
= V
= 45 volt. I
= 9.9
AN
C
and the
0
M
Taps — Use test connection No. 3 and repeat
C
above.
= 45
M
Taps — Use test connection No. 4 and repeat
0
above.
For .2 - 4.35 ohm relay
NOTE: Provide a jumper from terminal 19 to cen-
ter tap of the T
relay.
= 45
M
taps — Use connection No. 1 of Figure 9. Pass
A
20 amp. of current through relay. The
voltages should read as follows:
.425 (±.05 volts) between "0" tap and ".03" tap
1.70 (±.1 volts) between "0" tap and ".09" tap
2.55 (±.1 volts) between "0" tap and ".06" tap
M
Taps — Use test connection No. 2 and repeat
B
above.
M
Taps — Use test connection No. 3 and repeat
C
above.
O
=
C
Part E — Overcurrent Detector (For SDG-1T)
1. Energize dc circuit with rated dc voltage.
2. Use test connection No. 5. Set V
V
= 70 volts. Set current for 0.4 ampere for 1 -
CN
30 ohm relays , and for 0.8 ampere for .2 - 4.35
ohm relays.
Check relay output at test point 12 with voltameter or
oscilloscope. There should be a continuous output of
18-22 volt level under conditions specified above.
Adjust R63 potentiometer for specified pickup cur-
rent. Dropout should occur at:
.38 to .3 amp for 1-30 ohm relays
.76 to .6 amp for .2-4.35 ohm relays
Part F — Magnitude Comparator Circuit Adjust-
ment (large Printed Circuit Board) — All relays
R33 Adjustment
Energize relay with dc only. Connect 10K resistor
(±5%) between TP1 of the large PC board and relay
terminal 2. Use scope to monitor TP9 and adjust R33
until a positive output is obtained at TP9 (17 - 23
volts).
tap block for the SDG-1T
0
= 0, V
AN
=
BN
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