Technical Data; Generator Differential Protection Genpdif (87G) - ABB RELION 670 Series Technical Manual

Section 6
Differential protection
AlarmPickup
AlarmPickup
ANSI05000301 V1 EN-US
Figure 49: Logic diagram for 1Ph High impedance differential protection HZPDIF (87)
6.2.8

Technical data

Table 63: HZPDIF (87)technical data
Function
Trip voltage
Reset ratio
Maximum continuous power
Trip time at 0 to 10 x V
Reset time at 10 x V
Critical impulse time
Trip time at 0 to 2 x V
Reset time at 2 x V
Critical impulse time
6.3

Generator differential protection GENPDIF (87G)

148
0-tAlarm
0
Range or value
(10-900) V
I=V/R
>95% at (30-900) V
2
V>Pickup /SeriesResistor ≤200 W
Min. = 5 ms
d
Max. = 15 ms
to 0 Min. = 75 ms
d
Max. = 95 ms
2 ms typically at 0 to 10 x V
Min. = 25 ms
d
Max. = 35 ms
to 0 Min. = 50 ms
d
Max. = 70 ms
15 ms typically at 0 to 2 x V
0.03s
0
en05000301_ansi.vsd
Accuracy
±1.0% of I
±1.0% of I at I > I
-
-
-
d
-
d
1MRK 502 066-UUS B
IP14246-1 v1
M13081-1 v12
at I < I
n n
n
SEMOD156679-1 v3
Technical manual