Basler BE1-51 Time Overcurrent Relay Debugging Guide

Connect the test bench according to the induction type and use the TIMING indicator light as the start indicator (no output terminal is required)

Apply target starting current

TAP selects the gear closest to the target value and slightly higher, and TAP CAL rotates clockwise to the maximum

After applying current, slowly adjust the TAP CAL counterclockwise until the TIMING indicator light just turns on - completing the startup value calibration

Same operation for neutral wire (for models with neutral wire)

Common troubleshooting guide

Troubleshooting direction

The relay cannot be powered on to check if the voltage at the power terminal meets the nominal/range value of the selected power option (see Table 1-1); Check polarity (DC input has no polarity requirement but needs to be within the range)

TIMING indicator does not light up. Check if the induction input wiring is correct (high/low range terminals); Is TAP CAL in the correct position; Is the neutral wire DEFEAT switch mistakenly set to ON

The position of the timing accuracy out of tolerance confirmation curve selection switch is consistent with the selected curve; Does TIME DIAL correspond to the correct curve family; Test whether the current is accurate to 5 times the TAP value

Whether the momentary component does not move or moves too early, and whether the control potentiometer drifts due to vibration; Check if it is a four turn potentiometer (multiple turns are required to cover the full range)

The target does not maintain a current excitation type target and requires an output circuit of at least 0.2A; check if the target reset switch is stuck; Is the target state recovery function normal after power interruption

Communication/test plug issues: When using the Basler 10095 test plug, it is necessary to confirm that it fits well with the chassis terminals and whether the circuit switching timing is normal when the plug is unplugged

Maintenance and storage recommendations

BE1-51 does not require regular preventive maintenance, but it is recommended to conduct a functional spot check once a year, especially for the validation of start-up values and timing accuracy. For long-term stored backup equipment, due to the presence of aluminum electrolytic capacitors inside, powering on for at least 30 minutes per year can effectively extend the lifespan of the capacitors. If the device malfunctions, please contact Basler Electric technical support to arrange repairs and do not disassemble the circuit board by yourself.