9.2.3. Monitoring functions
9.2.3.1. Current transformer supervision (CTS)
Table. 9.2.3.1. - 305. Current transformer supervision (CTS) technical data
Input signals
Input magnitudes
Phase current fundamental freq RMS
Residual current fundamental freq RMS (optional)
Pick-up
Pick-up current setting
-Iset Highlimit / Iset Lowlimit / Isum difference
-Iset ratio / I2/I1 ratio
0.10…40.00 x In, setting step 0.01 x In
0.01…100.00 %, setting step 0.01 %
Inaccuracy
-Starting IL1, IL2, IL3
-Starting I2/I1
-Starting I01 (1 A)
-Starting I02 (0.2 A)
±0.5 %I
SET
or ±15 mA (0.10…4.0 x I
SET
)
±1.0 %I2
SET
/ I1
SET
or ±100 mA (0.10…4.0 x I
N
)
±0.5 %I0
SET
or ±3 mA (0.005…10.0 x I
SET
)
±1.5 %I0
SET
or ±1.0 mA (0.005…25.0 x I
SET
)
Time delay for alarm
De nite time function operating time setting
0.00…1800.00 s, setting step 0.005 s
Inaccuracy
-De nite Time (Im/Iset ratio > 1.05)
±2.0 % or ±80 ms
Instant operation time (alarm):
(Im/Iset ratio > 1.05)
<80 ms (<50 ms in differential protection relays)
Reset
Reset ratio
97 / 103 % of pick-up current setting
Instant reset time and start-up reset
<80 ms (<50 ms in differential protection relays)
9.2.3.2. Fuse failure VTS (60)
Table. 9.2.3.2. - 306. Fuse failure (60) technical data
Input signals
Measured magnitudes
P-P voltage fundamental frequency RMS
P-E voltage fundamental frequency RMS
Pickup
Pickup setting
-Voltage low pickup
-Voltage high pickup
-Angle shift limit
0.05…0.50 x Un, setting step 0.01 x Un
0.50…1.10 x Un, setting step 0.01 x Un
2.00…90.00 deg, setting step 0.10 deg
Inaccuracy
-Voltage
-U angle(U > 1 V)
±1.5 %U
SET
±1.5 °
External line/bus side pickup (optional)
0
→
1
Time delay for alarm
De nite time function operating time setting
0.00…1800.00 s, setting step 0.005 s
Inaccuracy
-De nite Time (Um/Uset ratio > 1.05 / 0.95)
±1.0 % or ±35 ms
Instant operation time (alarm):
(Um/Uset ratio > 1.05 / 0.95)
<80 ms
VTS MCB trip bus/line (external input)
<50 ms
AQ-F255
Instruction manual
Version: 2.00
361
© Arcteq Relays Ltd
