!
SAFETY
FOR LIFE
Time–Current Curves (cont’d)
High-Current Lockout
Figure 17 shows an example of sequence modification as a
result of High-Current Lockout. High-Current Lockout is
available in multipliers of 1 to 30 in increments of 1. Refer to
Access Codes 140 and 143 for interrogation and programming.
TCC Modification Limits
When modifying time–current curves, caution must be exer-
cised so that the modified curve does not exceed the short-
time current limits of the recloser. Consideration should be
given to the High-Current Trip and Lockout features when pro-
gramming very long timing curves with very high minimum trip
values.
60
50
40
30
20
10
8
6
5
4
3
2
1
.8
.6
.5
.4
.3
.2
0.1
.08
.06
.01
.02
.03
.04
.05
50
60
80
100
200
300
400
500
600
800
1000
2000
3000
4000
5000
6000
8000
10000
20000
30000
40000
50000
TIME (sec)
TIME [cycles (60 Hz basis)]
0.6
1.2
1.8
2.4
3.0
3.6
4.8
6.0
12
18
24
30
36
48
60
120
180
240
300
360
480
600
1200
1800
2400
3000
3600
65
CURRENT (percent of minimum trip)
1234
30
20
10
8
6
5
4
3
2
1
.8
.6
.5
.4
.3
.2
0.1
.08
.06
.01
.02
.03
.04
.05
50
60
80
100
200
300
400
500
600
800
1000
2000
3000
4000
5000
6000
8000
10000
20000
30000
40000
50000
CURRENT (percent of minimum trip)
TIME (sec)
TIME [cycles (60 Hz basis)]
0.6
1.2
1.8
2.4
3.0
3.6
4.8
6.0
12
18
24
30
36
48
60
120
180
240
300
360
480
600
1200
1800
133
High-Current
Loc kout Le vel
Nor mal Sequence
To Loc kout
Modified Sequence
To Loc kout
Figure 16.
TCC modification for High-Current Lockout.
Figure 17.
Maximum recloser limits for TCC modification.
Modifications (cont’d)
Recloser
Type
Maximum
Interrupting
Rating (sym A)
*Curves are recloser short time currents for a single trip
operation.
Curve*
RXE, RVE
WE
VWE, VWVE27,
VWVE38X
6000
10000
WVE27, WVE38X 8000
12000
VSA12, VSO12
VSA16, VSO16
12000
16000
1
2
3
4
5
5
VSA20, VSA20A,
VSA20B
20000 6
TABLE 7
Maximum Short-Time Recloser Limits
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