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41-133S
Ampere
Continuous
Tap Value
Range
TAP
(Amperes)
0.5
0.6
0.8
1.0
0.5/2.5
1.5
2.0
2.5
2
2.5
3
2/6
3.5
4
5
6
4
5
6
7
4/12
8
10
12
†
Thermal capacities for short times other than one second may be calculated on the basis of time being inversely
proportional to the square of the current.
φ
Degrees current lags voltage at tap value current.
‡
Voltages taken with high impedance type voltmeter
16
ENERGY REQUIREMENTS
TIME OVERCURRENT UNITS:
One Second
†
Rating
Rating
(Amperes)
2.7
88
3.1
88
3.7
88
4.1
88
5.7
88
6.8
88
7.7
88
8
230
8.8
230
9.7
230
10.4
230
11.2
230
12.5
230
13.7
230
16
460
18.8
460
19.3
460
20.8
460
22.5
460
25
460
28
460
Directional Overcurrent Ground Relays
IRD-7, IRC-7, IRP-7
At
Power
3 Times
Tap Value
Tap Value
Factor
φ
Angle
Current
Current
68
3.88
20.7
67
3.93
20.9
66
3.93
21.1
64
4.00
21.6
61
4.08
22.9
58
4.24
24.8
56
4.38
25.9
66
4.06
21.3
63
4.07
21.8
63
4.14
22.5
62
4.34
23.4
61
4.34
23.8
59
4.40
23.2
58
4.62
27.0
64
4.24
22.8
61
4.30
24.2
60
4.62
25.9
58
4.69
27.3
55
4.80
29.8
51
5.20
33.0
46
5.40
37.5
Types IRP, IRC and IRD
‡
VOLT AMPERES
At
At
10 Times
Tap Value
Current
103
107
114
122
148
174
185
111
120
129
141
149
163
183
129
149
168
187
211
260
308
At
20 Times
Tap Value
Current
278
288
320
356
459
552
640
306
342
366
413
448
530
624
392
460
540
626
688
860
1032
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