BECKWITH ELECTRIC Syncrocloser M-3410A, Instruction Book

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–4–
M-3410A Intertie/Generator Protection Relay
PROTECTIVE FUNCTIONS ( PROTECTIVE FUNCTIONS (
PROTECTIVE FUNCTIONS ( PROTECTIVE FUNCTIONS ( PROTECTIVE FUNCTIONS (cont cont cont cont cont.)
.)
.) .) .)
Device Device Device Device Device Setpoint Setpoint Setpoint Setpoint Setpoint
Number Number Number Number Number Function Function Function Function Function Ranges Ranges Ranges Ranges Ranges Increment Increment Increment Increment Increment Accuracy Accuracy Accuracy Accuracy Accuracy
Loss-of-Field (dual-zone offset-mho characteristic)
Circle Diameter #1, #2 0.01 to 3.00 0.01 PU 0.01 PU or 5%**
Offset #1, #2 –2.0 to 2.0 0.01 PU 0.01 PU or 5%**
Time Delay #1, #2 1 to 8160 Cycles 1 Cycle 2 Cycles
Voltage Control 4 to 100%* 0.1% 0.5 V or 0.5%
(positive sequence)
Directional Element Fixed at –13° — —
* Of nominal voltage.
** Accuracy applies for a nominal current range of 2.5 A to 6 A (5 A CT) or 0.5 A to 1.5 A (1 A CT).
Negative Sequence Overcurrent Negative Sequence Overcurrent
Negative Sequence Overcurrent Negative Sequence Overcurrent Negative Sequence Overcurrent
Definite Time
Pickup
3% to 300%* 1% 0.1 A or 0.5%**
( 0.02 A or 0.5%)
Time Delay 1 to 8160 Cycles 1 Cycle 2 Cycles
Inverse Time
Pickup
3% to 100%* 0.1% 0.1 A or 3%**
( 0.02 A or 3%)
Characteristic Curves Definite Time/Inverse Time/Very Inverse/Extremely Inverse/IEC/I
2
2 t=K
Time Dial Setting 0.5 to 11.0 0.1
0.05 to 1.1 (IEC) 0.01 3 Cycles or 10%**
1 to 95 (
I
2
2 t=K) 1
For I
2
2 t=K Curve Only
Definite Maximum
Time to Trip
600 to 65,500 Cycles 1 Cycle 3 Cycles or 10%**
Reset Time (Linear) 4 minutes
(from threshold of trip)
* Of nominal current for currents less than 14 A (2.8 A).
** Accuracy applies for a nominal current range of 2.5 A to 6 A (5 A CT) or 0.5 A to 1.5 A (1 A CT), and for a
pickup of >5%.
Negative Sequence Overvoltage Negative Sequence Overvoltage
Negative Sequence Overvoltage Negative Sequence Overvoltage
Negative Sequence Overvoltage
Pickup #1, #2 4 to 100%* 0.1% 0.5 V or 0.5%
Time Delay #1, #2 1 to 8160 Cycles 1 Cycle 2 Cycles
* Of nominal voltage.
Inverse Time Residual Overcurrent Inverse Time Residual Overcurrent
Inverse Time Residual Overcurrent Inverse Time Residual Overcurrent
Inverse Time Residual Overcurrent
Pickup 0.50 to 6.00 A 0.1 A 0.1 A or 3%
(0.10 to 1.20 A) ( 0.02 A or 3%)
Characteristic Curves Definite Time/Inverse Time/Very Inverse/Extremely Inverse/IEC
Time Dial
Standard Curves #1–#4
0.5 to 11.0 0.1 3 Cycles or 10%
IEC Curves #1–#4 0.05 to 1.10 0.01
Values in parentheses apply to 1 A CT secondary rating.
47
46
51N
27
40