Setting and troubleshooting of Basler BE1-27/59 voltage relay

Inverse time limit type: Corresponding to a specific curve, test according to column 1 (short delay) and column 2 (long delay) in Table 5-4. For example, the action time of the undervoltage short inverse time limit should be 0.087-0.187s in the 0.1s range and 6.23-6.69s in the 9.9s range.

Note: During testing, it is necessary to wire according to Figure 5-2, generate a step through the S1/S2 button, and measure the contact closure time with a timer.

Common fault phenomena and troubleshooting ideas

Possible causes of malfunction, inspection and resolution

The voltage is normal but the undervoltage indicator light is on. The setting value is set too high (close to the rated voltage); Compare the measured PT voltage with the panel setting value using a multimeter for PT secondary circuit abnormalities (voltage drop); Reduce the undervoltage setting value

Overvoltage does not operate. The overvoltage setting value is set too high, or the PT ratio is incorrect. Check the system rated voltage and relay range; Check if the wiring is missing phase

The action time does not match the set time limit. If the dial is not reset to zero or the inverse time limit curve is selected incorrectly, verify the dial number and magnification, and refer to the curve diagram for confirmation

The output contact is not closed but the indicator light is on. The output relay coil is damaged or the contact is burned; Manually operate the test button to open the external trip circuit and check the continuity of the contacts; If normal, check the external circuit

If the target indicator is not lit and it is a current type target, a current of ≥ 200mA is required; Or internal latch circuit fault confirmation tripping circuit current; Test using internal triggering method (if selected)

The power indicator light is not on, and the auxiliary power supply is missing or the power module is faulty. Check if the terminal voltage meets the rated range; Measure power output (+12V/-12V)

Replacement selection and upgrade suggestions

When it is necessary to replace old-fashioned electromechanical voltage relays (such as GE IJV, Westinghouse VRS) on site, the BE1-27/59 series can be directly replaced, but attention should be paid to:

Input voltage range: The old style may have multiple taps, while the BE1 series provides continuous adjustable range, which needs to be selected according to the actual PT secondary voltage (2/3/4).

Time characteristics: Electromechanical systems are mostly time limited, and BE1 provides inverse time limit options, which need to be re adjusted according to protection coordination.

Contact capacity: The BE1 series has low DC arc breaking ability (0.3A inductive), and if driving large intermediate relays, contactors or solid-state relays need to be installed.

Dimensions: The S1 chassis size is compatible with most older models, but the opening size needs to be confirmed.

If digital functions such as communication and event recording are required, Basler BE1-FLEX or DECS series digital relays can be considered, but the cost is high and this series can be temporarily used for non emergency modifications.

Maintenance and Storage

Regular verification: It is recommended to conduct a startup value and delay test once a year, record data and compare it with the last time, and monitor drift.

Cleaning: Keep the panel and terminals clean and dry to avoid insulation degradation caused by dust accumulation.

Storage: When spare parts are stored for a long time, they should be powered on for 30 minutes each year to maintain the performance of the internal electrolytic capacitor (as clearly indicated in the manual).

Repair: If the fault cannot be resolved, contact Basler technical support to obtain a repair number. Do not disassemble or repair the circuit board on site.