errors. The manufacturer of the measuring devices is to be contacted for
information on the measuring errors.
If the measuring errors are not compensated for, the underpower setting
should not be lower than the sum of the current-measuring and voltage-
measuring errors.
For example, if the error of the current-measuring device is 2% and that of
the voltage-measuring device is 1%, the minimum setting is (2 + 1)% =
3%.
4.8.1.6
Signals
Table 622:
32U Input signals
Name
Type
Default
Description
I_A
SIGNAL
0
Phase A current
I_B
SIGNAL
0
Phase B current
I_C
SIGNAL
0
Phase C current
I1
SIGNAL
0
Positive sequence current
V_A
SIGNAL
0
Phase-to-ground voltage A or phase-to-phase voltage
AB
V_B
SIGNAL
0
Phase-to-ground voltage B or phase-to-phase voltage
BC
V_C
SIGNAL
0
Phase-to-ground voltage C or phase-to-phase voltage
CA
V1
SIGNAL
0
Positive phase sequence voltage
BLOCK
BOOLEAN
0=False
Block signal for activating the blocking mode
DISABLE
BOOLEAN
0=False
Signal to block the function during generator startup
Table 623:
32U Output signals
Name
Type
Description
TRIP
BOOLEAN
Trip
PICKUP
BOOLEAN
Pickup
4.8.1.7
Settings
Table 624:
32U Group settings (Basic)
Parameter
Values (Range)
Unit
Step
Default
Description
Pickup value
0.01...2.00
xSn
0.01
0.10
Pickup value
Trip delay time
40...300000
ms
10
40
Trip delay time
Section 4
1MAC059074-MB A
Protection functions
722
615 series ANSI
Technical Manual
Summary of Contents for Relion 615 series
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