*
115
230
DC VOLTS
48
125
250
GEI-50261
TABLE I
INTERRUPTING RATINGS
INDUCTIVE*
0. 75
0. 5
1. 0
0. 5
0. 25
NON-INDUCTIVE
2. 0
1. 5
3. 0
1. 5
1. 0
The inductive rating 1.s based on the inductance of an average tripping
coil.
Burden Data
With the potential transformers connected 1.n wye, as shown 1.n Figure 6 (A), the
relay burden is as shown in TABLE II
TABLE II
CURRENT
(MA)
VA BURDEN PER P.T.
VOLTS
FREQUENCY
15
I6
I7
P. T. 4F1
P. T. 4fo2
P.T. 4fo3
120
60
77 115
38
5. 32
7. 97
2. 63
120
50
40
95
66
2. 77
6. 57
4. 57
208
60
38
59
23
3. 96
7. 07
2. 76
If the potential transformers are connected in open delta, as shown in Figure 6 (B),
the burden is as shown in Table III.
For the best division of burden, it is
recormnended that terminal No. 6 of the relay be connected to the "MID" point of the
delta-connected potential transformers.
TABLE III
CURRENT
(MA)
VA BURDEN PER P.T.
VOLTS
FREQUENCY
15
I6
I7
P.T. 4fl
P.T. 4f2
120
60
115 38
9. 23
4. 56
120
50
40
95 66
4. 80
7. 82
208
60
38
59 23
7. 90
4. 78
With unbalanced voltage applied to the relay, the burden will depend on the nature
and amount of unbalance.
However, the maximum burden will occur when rated single
phase voltage is applied to terminals 5 and 6.
The burden data for this condition
are shown in Table IV.
5
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