Advertisement
Type CKO Overcurrent Relay
TYPE CKO-8 AND TYPE CKO-9 TIME OVERCURRENT UNITS
CONTINUOUS
AMPERE
RATING
RANGE
TAP
(AMPERES)
0.5
2.7
0.6
3.1
0.8
3.7
0.5-2.5
1.0
4.1
1.5
5.7
2.0
6.8
2.5
7.7
2
8.0
2.5
8.8
3
9.7
2-6
3.5
10.4
4
11.2
5
12.5
6
13.7
4
16.0
5
18.8
6
19.3
4-12
7
20.8
8
22.5
1 0
25.0
1 2
28.0
CONTINUOUS
AMPERE
RATING
RANGE
TAP
(AMPERES)
0.5
1.7
0.6
1.9
0.8
2.2
0.5-2.5
1.0
2.5
1.5
3.0
2.0
3.5
2.5
3.8
2.0
7.0
2.5
7.8
3.0
8.3
2-6
3.5
9.0
4.0
10.0
5.0
11.0
6.0
12.0
4.0
14.0
5.0
16.0
6.0
17.0
4-12
7.0
18.0
8.0
20.0
10.0
22.0
12.0
26.0
†
Thermal capacities for short times other than one second maybe 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.
ENERGY REQUIREMENTS
ONE SECOND
POWER
†
RATING
FACTOR TAP VALUE
ø
(AMPERES)
ANGLE
88
72
88
71
88
69
88
67
88
62
88
57
88
53
230
70
230
66
230
64
230
62
230
60
230
58
230
56
460
68
460
63
460
60
460
57
460
54
460
48
460
45
CKO-11 TIME OVERCURRENT UNITS
ONE SECOND
POWER
†
RATING
FACTOR TAP VALUE
ø
(AMPERES)
ANGLE
56
36
56
34
56
30
56
27
56
22
56
17
56
16
230
32
230
30
230
27
230
24
230
23
230
20
230
20
460
29
460
25
460
22
460
20
460
18
460
17
460
16
VOLT AMPERES
AT
AT 3 TIMES
TAP VALUE
CURRENT
CURRENT
2.38
21.0
2.38
21.0
2.40
21.1
2.42
21.2
2.51
22.0
2.65
23.5
2.74
24.8
2.38
21.0
2.40
21.1
2.42
21.5
2.48
22.0
2.53
22.7
2.64
24.0
2.75
25.2
2.38
21.3
2.46
21.8
2.54
22.6
2.62
23.6
2.73
24.8
3.00
27.8
3.46
31.4
VOLT AMPERES
AT
AT 3 TIMES
TAP VALUE
CURRENT
CURRENT
0.72
6.54
0.75
6.80
0.81
7.46
0.89
8.30
1.13
10.04
1.30
11.95
1.48
13.95
0.73
6.30
0.78
7.00
0.83
7.74
0.88
8.20
0.96
9.12
1.07
9.80
1.23
11.34
0.79
7.08
0.89
8.00
1.02
9.18
1.10
10.00
1.23
11.10
1.32
14.90
1.80
16.30
41-101.3A
††
AT 10 TIMES
AT 20 TIMES
TAP VALUE
TAP VALUE
CURRENT
CURRENT
132
350
134
365
142
400
150
440
170
530
200
675
228
800
136
360
142
395
149
430
157
470
164
500
180
580
198
660
146
420
158
480
172
550
190
620
207
700
248
850
292
1020
††
AT 10 TIMES
AT 20 TIMES
TAP VALUE
TAP VALUE
CURRENT
CURRENT
71.8
250
75.0
267
84.0
298
93.1
330
115.5
411
136.3
502
160.0
610
74.0
264
78.5
285
84.0
309
89.0
340
102.0
372
109.0
430
129.0
504
78.4
296
90.0
340
101.4
378
110.0
454
124.8
480
131.6
600
180.0
720
7
Advertisement
