2–22
M-3520 Instruction Book
47 Negative Sequence Overvoltage
The Negative Sequence Overvoltage function 47
provides protection for voltage imbalance and
reverse phase sequence.
Save
Cancel
@ : WARNING, Function DISABLED until output selected!
(47) - NEGATIVE SEQUENCE OVERVOLTAGE
Pickup:
Delay:
5 V
1 Cycle
180 V
8160 Cycles
#1
OUTPUT
8
7
6
5
4
3
2
1
FL
6
5
4
3
2
1
Blocking Input
@
Pickup:
Delay:
5 V
1 Cycle
180 V
8160 Cycles
#2
OUTPUT
8
7
6
5
4
3
2
1
FL
6
5
4
3
2
1
Blocking Input
@
Figure 2-13
M-3822 IPScom
®
for Windows™ Negative Sequence Overvoltage (47) Setpoint Ranges
Path
: Relay Menu/Setup/Setpoints/(47) Negative Sequence Overvoltage
COMMAND BUTTONS
Save
Saves all information to the relay.
Cancel
Returns the user to the previous window; any changes to the displayed information are lost.
47#1 PICKUP
________ Volts
47#1 DELAY
________ Cycles
47#2 PICKUP
________ Volts
47#2 DELAY
________ Cycles
A pickup setting in the range of 10 to 30 V can reliably
detect open phases and reverse phase sequence.
A minimum time delay of 6 to 10 cycles will prevent
misoperation during switching transients.
If this function is enabled, the following settings are applicable:
Summary of Contents for M-3520
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