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41-116K
Ampere
Range
Tap
.05
0.6
0.8
0.5/2.5
1.0
1.5
2.0
2.5
2
2.5
3
2/6
3.5
4
5
6
4
5
6
4/12
7
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.
Ø Degrees current lags voltage at tap value current.
**
Voltages taken with Rectox type voltmeter.
10
ENERGY REQUIREMENTS
COV-7 OVERCURRENT UNITS
Continuous
One Second
Rating
Rating*
( Amperes )
( 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
60 HZ VOLT AMPERES ** (x
At
Power
Tap Value
Factor
Current
Angle Ø
(∆ =.86)
68
3.88
67
3.93
66
3.93
64
4.00
61
4.08
58
4.24
56
4.38
66
4.06
63
4.07
63
4.14
62
4.34
61
4.34
59
4.40
58
4.62
64
4.24
61
4.30
60
4.62
58
4.69
55
4.80
51
5.20
46
5.40
Type COV Voltage
Controlled Overcurrent Relay
∆
FOR 50 Hz)
At 3 Times
At 10 Times
Tap Value
Tap Value
Current
Current
(∆ =.88)
(∆ =.90)
20.7
103
20.9
107
21.1
114
21.6
122
22.9
148
24.8
174
25.9
185
21.3
111
21.8
120
22.5
129
23.4
141
23.8
149
25.2
163
27
183
22.8
129
24.2
149
25.9
168
27.3
187
29.8
211
33
260
37.5
308
At 20 Times
Tap Value
Current
(∆ =.91)
278
288
230
356
459
552
640
306
342
366
413
448
530
624
392
460
540
626
688
860
1032
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