Basler BE1-25 synchronous inspection relay principle and testing

It is recommended to use a dedicated relay protection tester or build a testing circuit according to Figure 5-2 for testing equipment:

Dual voltage source that can independently adjust amplitude, frequency, and phase

timer

DC power supply (for output circuit and target testing)

6.2 Preliminary Setting

All contact induction inputs are open circuit

All CONDITION switches and MODE switches are turned off

Rotate all multi turn potentiometers counterclockwise to the minimum (Δ V controls clockwise to the maximum)

The input voltage of the line and bus is 95Vac, with a phase difference of 0 °

Apply relay power supply

6.3 Basic functional testing of synchronous detection

Step 1: Verification of Phase Angle Function

Set PHARE ANGLE as the target value and TIME DELAY as the minimum

Verify that the 'allow/prohibit' action is within the specification range

Observe that the PHASE ANGLE LED lights up during the delay period, and the SYNC LED flashes when the output contact is closed (the LED goes out after the input of the circuit is open in case of an open circuit in case of an open circuit in case of an open circuit in case of an open circuit in case of an open circuit in case of an open circuit in case of an

Step 2: Timing accuracy verification

Line and bus are in phase (0 ° phase difference)

Set TIME DELAY to 9.9 seconds (x 0.1 level) and 99 seconds (x 1 level) respectively

Start/stop timing by closing/opening the input of the 56b

Verify timing accuracy within specification range

Step 3: Low voltage suppression verification

Reduce the voltage of the line and bus to 80Vac, and the synchronous function should work normally (not suppressed)

Reduce the line voltage to 20Vac, and the synchronous function should be suppressed (the PHARE ANGLE LED should not light up)

Restore the line to 80Vac, reduce the busbar to 20Vac, and suppress the synchronous function

6.4 Voltage Monitoring Function Test (NORMAL Mode)

Adjust LB control to 80Vac threshold, DB/NOT OV control to 30Vac threshold, LL control to 80Vac threshold, DL/NOT OV control to 30Vac threshold

Set TIME DELAY to 99 seconds (to prevent interference from synchronous output testing)

Verify the output logic of each conditional switch combination in Table 2

6.5 Voltage Monitoring Function Test (NOT-OV Mode)

Adjust LB control to 80Vac threshold, DB/NOT OV control to 120Vac threshold, LL control to 80Vac threshold, DL/NOT OV control to 120Vac threshold

Verify the output logic of each conditional switch combination in Table 3

Additional constraint of 'non overvoltage' added when confirming switch No.1 ON

6.6 Voltage Difference (Δ V) and Extended Window Test

Verify that the synchronous output is enabled within the set range of Δ V, and suppress it when it exceeds the range

Verify the option to expand the phase angle window (if equipped) to increase the window by 2 or 3 times

Common troubleshooting guide

Troubleshooting direction

Check if the power terminal voltage meets the nominal value of the selected power option when the POWER indicator light is not on; DC input has no polarity requirement but must be within the specification range

SYNC output is not closed. Check if the input of the circuit breaker is closed (auxiliary contact signal of the circuit breaker); Is PHASE ANGLE set to 00 (inhibition); Is TIME DELAY set to 00 (inhibition); Is the line/bus voltage below the minimum detection threshold of 80V; Does the Δ V option exceed the set value

Check the positions of the MODE switch and CONDITION switch for abnormal voltage monitoring LED indication; Verify if LL/LB/DL/DB/NOT OV control potentiometer calibration is offset

The target indication does not maintain a current of at least 0.2A in the output circuit (current excitation type); Check if the target reset switch is stuck; Is the target state recovery function normal after power interruption

If the test button is invalid, a non-conductive thin rod with a diameter of no more than 1/8 inch must be used to press it (metal tools may cause short circuits); Check if the corresponding output relay is faulty

Check the contact induction module (Type T power supply) for abnormal communication with SCADA (if any); Does the isolated input mistakenly apply external voltage (which can cause damage)