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SPECIFICATIONS
Burdens
Burdens for the over-current units are listed in Table 3. Burdens decrease with increasing current above
minimum setting, due to the power supply shunting in the power supply circuit. Since the power supply is
the major portion of the burden, the burden for a given input current will be constant, irrespective of pick-
up settings on both TOC and IOC units.
Unit
Range
Hz
1 A
0.1 / 31.8
5 A
0.5 / 15.9
2
100
4
3 3
2
10
4
3 3
2
1
4
3
4
5 5 6 7 8
5AMP Model
1AMP Model
0.1
Power Management
Burden
DIAC / DIFC / DSFC Digital Overcurrent Protection
Table 3: Burden Settings
Burden @ Minimum Setting
R
jX
60
28.8
29.2
60
1.28
1.15
2
3
1
2
3
4
5 5
6 7 8
Input Current
OVERCURRENT RELAYS
DIAC, DIFC, & DSFC
General Electric CO., 205 Great Valley Parkway, Malvern, PA
Figure 31: Burden curve
Burden in ohms (Z) at multiples of
∠
3 ×
Z
41.3
9.36
45°
1.74
0.394
42°
4
5 5 6 7
2
10
2
3
4
1
Frequency: 50/60 Hertz
Current Range: 0.5 - 15.9 ( 5 Ampere Relays)
0.1 - 3.18 (1 Ampere Relays)
*(.&
minimum pickup
10 ×
20 ×
2.32
1.24
0.094
0.052
3
4
5 5
6
100
5 5
6 7
2
10
0361A7504
GES10040
100 ×
0.768
0.034
41
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