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Effective 11/2003
Page 5
I.L. 66A7535H02
Table 1.1d VOLTAGE PROTECTION functions for Digitrip 1150V/1150Vi Trip Units
Trip Unit Type
Digitrip 1150V
Digitrip 1150V
i
SYSTEM Frequency
50 or 60 Hz
50 or 60 Hz
TRIPS
RANGE
STEP
SIZE
TOLERANCE
UnderVoltage Trip
45% to 110% of VT Primary
1 volt
+/- 3% FS
UnderVoltage Time
1 to 250 seconds
1 second
+2.5s, -0.5s or +2%, -2%
whichever larger
OverVoltage Trip
80% to 135% of VT Primary
1 volt
+/- 3% FS
OverVoltage Time
1 to 250 seconds
1 second
+2.5s, -0.5s or +2%, -2%
whichever larger
UnderFrequency Trip
48 to 52 Hz (50 Hz)
58 to 62 Hz (60Hz)
0.1 Hz
+/- .05 Hz
UnderFrequency Time
0.20 to 5.0 seconds
0.02 seconds
+0.1s/-0s
OverFrequency Trip
48 to 52 Hz (50 Hz)
58 to 62 Hz (60Hz)
0.1 Hz
+/- .05 Hz
OverFrequency Time
0.20 to 5.0 seconds
0.02 seconds
+0.1s/-0s
Voltage Unbalance Trip
5% to 50%
1%
+/-3
Voltage Unbalance Time
1 to 250 seconds
1 second
+2.5s, -0.5s or +2%, -2%
whichever larger
Reverse Power Trip
1 to 65000kW
1 kW
+/- 4% FS
Reverse Power Time
1 to 250 seconds
1 second
+3s or +2%
whichever larger
ALARMS
RANGE
STEP
SIZE
TOLERANCE
UnderVoltage Alarm
45% to 110% of VT Primary
1 volt
+/- 3% FS
UnderVoltage AlarmTime
1 to 250 seconds
1 second
+2.5s, -0.5s or +2%, -2%
whichever larger
OverVoltage Alarm
80% to 135% of VT Primary
1 volt
+/- 3% FS
OverVoltage AlarmTime
1 to 250 seconds
1 second
+2.5s, -0.5s or +2%, -2%
whichever larger
UnderFrequency Alarm
48 to 52 Hz (50 Hz)
58 to 62 Hz (60Hz)
0.1 Hz
+/- .05 Hz
UnderFrequency AlarmTime
0.20 to 5.0 seconds
0.02 seconds
+0.1s/-0s
OverFrequency Alarm
48 to 52 Hz (50 Hz)
58 to 62 Hz (60Hz)
0.1 Hz
+/- .05 Hz
OverFrequency AlarmTime
0.20 to 5.0 seconds
0.02 seconds
+0.1s/-0s
Voltage Unbalance Alarm
5% to 50%
1%
+/-3
Voltage Unbalance AlarmTime
1 to 250 seconds
1 second
+2.5s, -0.5s or +2%, -2%
whichever larger
Phase Rotation Alarm
ABC, CBA, OFF
-
-