53
S280-77-4
!
SAFETY
FOR LIFE
Duty Cycle Monitor
Security
Limits
Access
Factory
Code
Write
Read
Scroll
High
Low
Incr
Parameter
Settings
170
1
0
NO
9999
1
1
100% Interrupter Duty Factor
97
•
Use CHANGE key to enter value.
•
Duty factor is value listed in
100% Duty Cycle Factor
column x 10
5
.
Using the table below, select the appropriate recloser
interrupting duty cycle factor and enter that value
using Access Code 170.
Security
Limits
Access
Factory
Code
Write
Read
Scroll
High
Low
Incr
Parameter
Settings
171
1
0
YES
999.9
0
0.1
Bushing 1-2 Phase Interrupter Duty (%)
0
172
1
0
YES
999.9
0
0.1
Bushing 3-4 Phase Interrupter Duty (%)
0
173
1
0
YES
999.9
0
0.1
Bushing 5-6 Phase Interrupter Duty (%)
0
•
Information is accessible via the keyboard or Digital
Communications.
•
Use CHANGE key to enter value or reset to zero.
•
A new recloser, not in service, has 0% interrupting
duty cycle. As the recloser is used, the duty cycle
increases. When the interrupting duty reaches
100%, the interrupter contacts should be examined
and replaced.
The Duty Cycle Monitor provides keyboard accessible duty
cycle information
•
The Duty Cycle measures and records duty for each indi-
vidual phase in non-volatile memory.
•
The recloser duty is measured and stored on the basis of
Cur-
rent
1.5
x Number of Operations
for Each Phase (ANSI C37.61).
•
Readout is based on a percentage of total duty cycle for
each phase.
•
Duty record can be adjusted or reset if recloser is changed-
out, serviced, etc.
•
Feature is enabled and disabled via Access Code 24
(ON/OFF) through Security Level 1.
•
Readout does not require security access.
•
Information is also accessible via Digital Communications.
TABLE 9
Interrupter Duty Factor
Interrupting
100% Duty
Recloser
Rating
Cycle
Type
(RMS Sym A)
Factor
RXE, RVE
6000 A
97
WE
12000A @ 4.8 kV
257
WE
10000A @ 14.4 kV
196
VWE
VWVE27
12000 A
1045
VWVE38X
WVE27
8000 A
140
WVE38X
8000 A
140
VSA12
12000 A
1045
VSA16
16000 A
1608
Interrupting
100% Duty
Recloser
Rating
Cycle
Type
(RMS Sym A)
Factor
VSA20
VSA20A
20000 A
2248
VSA20B
VSO12
12000 A
1045
VSO16
16000 A
1608
NOVA15
NOVA27
12000 A
1111
NOVA38