| MR Series: |
Protective current transformers are required
to operate over a range of current many times the
circuit rating and is frequently subjected to conditions
greatly exceeding those which it would be subjected
to as a measuring current transformer. When a current
transformer is used to energise a protective relay,
it must maintain its characteristic ratio up to
some multiple offered rated current. This multiple,
may be 5, 10, 20 or some even higher value and is
know as the Accuracy Limit Factor(ALF). Therefore,
the selection of Protective Current Transformers
in relation to accuracy class and ALF require a
close examination of relay characteristic and circuit
conditions which includes the relay burden and the
pilot wire lead burden |
| Dimensions (mm) |
| CI: 10P5 15VA |
| Spec. |
60/5A |
100/5A |
150/5A |
200/5A |
250/5A |
300/5A |
400/5A |
500/5A |
600/5A |
OD |
100 |
100 |
100 |
100 |
96 |
96 |
96 |
100 |
100 |
ID |
34 |
34 |
34 |
34 |
34 |
34 |
34 |
60 |
65 |
HT |
148 |
98 |
68 |
58 |
68 |
68 |
68 |
48 |
58 |
|
| CI: 5P10 15VA |
| Spec. |
100
/5A |
150
/5A |
200
/5A |
250
/5A |
300
/5A |
400
/5A |
500
/5A |
600
/5A |
800
/5A |
1000
/5A |
1200
/5A |
1600
/5A |
2000
/5A |
2500
/5A |
3000
/5A |
3500
/5A |
4000
/5A |
5000
/5A |
OD |
100 |
100 |
100 |
96 |
96 |
96 |
102 |
110 |
120 |
120 |
123 |
123 |
123 |
178 |
178 |
182 |
182 |
184 |
ID |
34 |
34 |
34 |
45 |
45 |
45 |
62 |
68 |
62 |
85 |
82 |
82 |
125 |
125 |
125 |
120 |
120 |
118 |
HT |
180 |
130 |
110 |
110 |
110 |
90 |
110 |
88 |
22 |
68 |
60 |
68 |
40 |
40 |
40 |
35 |
35 |
38 |
|
| CI: 10P10 |
| Spec. |
100
/5A |
150
/5A |
200
/5A |
300
/5A |
400
/5A |
500
/5A |
600
/5A |
800
/5A |
1000
/5A |
1200
/5A |
1600
/5A |
2000
/5A |
2500
/5A |
3000
/5A |
OD |
100 |
100 |
100 |
96 |
96 |
102 |
110 |
120 |
120 |
123 |
123 |
178 |
178 |
178 |
ID |
34 |
34 |
34 |
45 |
60 |
60 |
68 |
62 |
85 |
82 |
82 |
125 |
125 |
125 |
HT |
168 |
108 |
88 |
108 |
108 |
88 |
88 |
22 |
58 |
60 |
50 |
38 |
38 |
38 |
|
| outline drawing: |
 |
