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GEI-90802
shown in Figure 4.
The approximate reset time with both coils de-energized is about
40 seconds.
The approximate reset time with one coil energized at rated voltage
varies from 3 seconds on the 20 0 setting to 6 seconds on the 60 0 setting with the
No. 10 time-dial setting.
The Model 12IJS52D3 relay, which is designed for use where a closing angle greater
than 200 is required, provides 20 seconds delay at the 400 closing-angle setting, as
shown in Figure 5.
It may be adjusted to other closing angles between 200 and 600
with corresponding changes in time delay, as shown in Figure 5.
The approximate
reset time with both coils de-energized is about 130 seconds at the No. 10 time-dial
setting.
The approximate reset time with one coil energized at rated voltage varies
from 13 seconds on the 20 0 setting to 20 seconds on the 60 0 setting at the No. 10
time-dial setting.
Figure
6
gives the operating time in seconds for various time-dial settings with
zero phase displacement and with rated voltage at 60 cycles on both circuits.
Curves for 50 cycles are similar.
The telephone-type undervoltage units are
calibrated to pick up at 50% or less of rated voltage and to drop out at 15% or more
of rated voltage.
BURDENS
The burdens for the synchronism-check unit are given in Table I.
The burden varies
with the phase displacement of the two voltages, with a minimum at 0
0
to a maximum
at 180
0 •
TABLE I
Vo
1
ts
Cycle s
Ci rcuit
Phase Di fference
Watts
Volt Amps
Power
Factor
5-6
0
0
1.00
3.86
0.258
5- 6
180
0
1.25
4.00
0.312
67*
60
7-8
0
0
1.10
3.63
0.300
7-8
180
0
1.36
3.77
0.360
5- 6
0°
1.45
4.73
0.306
5- 6
180
0
1. 75
4.87
0.359
67*
50
7-8
0
0
1.58
4.45
0.357
7-8
180
0
1.87
4.63
0.403
5-6
0
0
3.00
11.6
0.258
5- 6
180
0
3.76
12.0
0.313
l15
60
7-8
0
0
3.30
10.9
0.300
7-8
180
0
4.07
11.3
0.360
5- 6
0°
4.35
14.2
0.306
5-6
180
0
5.25
14.6
0.359
ll5
50
7-8
0
0
4.75
13.3
0.357
7-8
180
0
5.60
13.9
0.403
*
The burden of telephone-relay units is 10 volt-amperes and 6 watts for each unit
rated at 67 volts, 60 cycles, and 13 volt-amperes and 8 watts for each unit rated at
115 volts, 60 cycles.
5
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