GE NBVllA Series Instructions Manual page 5

115
230
DC VOLTS
48
125
250
*
The inductive rating 1.s based on the inductance of an average tripping
coil.
Burden Data
With the potential transformers connected 1.n wye,
relay burden is as shown in TABLE II
FREQUE N CY
VOLTS
120 60
120 50
208
60
If the potential transformers are connected in open delta, as shown in Figure 6 (B),
the burden is as shown in Table
recormnended that terminal N o. 6 of the relay be connected to the "MID" point of the
delta-connected potential transformers.
VOLTS FREQUENCY
120 60
120 50
208 60
With unbalanced voltage applied to the relay, the burden will depend on the nature
and amount of unbalance.
phase voltage is applied to terminals 5 and 6.
are shown in Table IV.
GEI-50261
TABLE I
I N TERRUPTI N G RATI N GS
I N DUCTIVE *
0. 75
0. 5
1. 0
0. 5
0. 25
TABLE II
(MA)
CURRE N T
1 5 I 6 I 7
77 11 5 38
40 95 66
23
38 59
III. For the best division of burden,
TABLE III
(MA)
CURRE N T
1 5 I 6 I 7
115 38
40 95 66
23
38 59
However, the maximum burden will occur when rated single­
5
N O N -I N DUCTIVE
as shown 1.n Figure 6 (A), the
VA BURDE N PER P.T.
P. T. 4F1 P. T . 4fo2
5. 32 7. 97
2. 77 6. 57
3. 96 7. 07
VA BURDE N PER P.T.
P.T. 4fl P.T. 4f2
9. 23 4. 56
4. 80 7. 82
7. 90
4. 78
The burden data for this condition
2. 0
1. 5
3. 0
1. 5
1. 0
P.T. 4fo3
2. 63
4. 57
2. 76
it is