BECKWITH ELECTRIC Syncrocloser M-3410A, Instruction Book

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M-3410A Intertie/Generator Protection Relay
Values in parentheses apply to 1 A CT secondary rating.
PROTECTIVE FUNCTIONS PROTECTIVE FUNCTIONS
PROTECTIVE FUNCTIONS PROTECTIVE FUNCTIONS
PROTECTIVE FUNCTIONS
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
Sync Check
Phase Angle Window 0° to 90° 1° 1°
Upper Voltage Limit 100.0 to 120.0%* 0.1% 0.5 V or 0.5%
Lower Voltage Limit 70.0 to 100.0%* 0.1% 0.5 V or 0.5%
Delta Voltage Limit 1.0 to 50.0%* 0.1% 0.5 V
Delta Frequency Limit 0.001 to 0.500 Hz 0.001 Hz 0.001 Hz or 5%
Sync Check Time Delay 1 to 8160 Cycles 1 Cycle
Dead Voltage Limit 0.0 to 50.0%* 0.1% 0.5 V or 0.5%
Dead Time Delay 1 to 8160 Cycles 1 Cycle 2 Cycles
* Of nominal voltage.
Sync Check may be operated as a stand-alone function or supervised by 79 (reconnect). Various
combinations of input supervised hot/dead closing schemes may be selected. This function can only be
enabled in line-to-line VT configuration and when functions 27G and 59G are not enabled.
Phase Undervoltage
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.
** When DFT is selected, the time delay accuracy is 2 cycles. When RMS magnitude is selected, an
additional time delay from 0 to +20 cycles may occur.
Ground Undervoltage Ground Undervoltage
Ground Undervoltage Ground Undervoltage Ground Undervoltage
Pickup 4 to 100%* 1 % 0.5 V or 0.5%
Time Delay 1 to 8160 Cycles 1 Cycle 2 Cycles
* Of nominal voltage, maximum of 600 V.
This function can only be enabled when the relay is configured in line-to-line VT and the 25 function is not
enabled.
Directional Power
Pickup #1, #2 –3.00 to +3.00 PU 0.01 PU 0.02 PU or 2%*
Time Delay #1, #2 1 to 8160 Cycles 1 Cycle 2 Cycles
The per-unit pickup is based on nominal VT secondary voltage and nominal CT secondary current settings for
currents less than 14 A (2.8 A). This function can be selected as overpower or underpower in the forward
direction (positive setting) or reverse direction (negative setting). This function can also be selected for single
phase detection for line-to-ground VT.
Minimum sensitivity of 100 mA for 5 A CT (real component of current).
* 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).
25
27
32
27G