Basler XR2002/XR2002F Regulator

Eb=IF×(RF+R51)

Among them, R51 is the current limiting resistor, and RF is the excitation winding resistor.

System debugging and parameter tuning process

1. Pre set before startup

VOLT knob: Rotate counterclockwise to minimum

STAB knob: Rotate to the middle stroke

UF ADJ knob: maintain factory preset position

Stability jumper: Both jumpers are connected to terminal C (corresponding to "medium speed" response)

Frequency compensation jumper: Connect to the corresponding terminal according to the system frequency (50/60Hz)

2. Startup and voltage establishment

Start the prime mover to the rated speed

Close the excitation shutdown switch

Slowly adjust the VOLT knob clockwise until the generator voltage reaches the rated value

If using an external remote voltage regulator resistor (R50), the jumper between terminals 6-7 should be removed and R50 should be connected

3. Stability tuning (key step)

The goal of stability tuning is to eliminate the "hunting" phenomenon of generator voltage while also considering response speed:

Under no-load conditions, rotate the TAB knob counterclockwise until the voltage fluctuates (critical instability)

Slowly rotate the TAB clockwise again until the fluctuation disappears

Alternating load switching and observing voltage recovery waveform

If there is still oscillation, the stability jumper can be adjusted in the following order to obtain a more stable response:

Jumper 1, Jumper 2, Response Speed

J1 C Fast

C C medium speed (default)

J1 J2 medium speed

C J2 is slow

4. Frequency compensation characteristic adjustment (only for XR2002F)

V/Hz mode: Adjust UF ADJ to make the UF indicator light just turn on, continue adjusting until the voltage drops to 90% of the rated value, and then use VOLT to restore the rated voltage

VLV/Hz mode: First adjust the prime mover speed to the desired inflection point frequency (such as 57Hz/60Hz system), adjust the UF ADJ to turn on the UF indicator light, and then restore the rated speed to confirm that the indicator light is off

Troubleshooting Logic and Case Analysis

The manual provides a systematic troubleshooting table, with the following typical faults and their diagnostic logic:

Fault phenomenon 1: Voltage cannot be established (PMG power supply)

Measure whether the voltage of terminals 3-4 (single-phase) or 3-4-5 (three-phase) is within the allowable range

Measure if there is approximately 63Vdc output between F+- F -

If the input voltage is normal but there is no output, the regulator is faulty

If the input voltage is abnormal, check the wiring, fuses, switches, and transformers

Fault phenomenon 2: Voltage establishment → attenuation → re establishment (periodic)

If the external remote control voltage regulator resistor (R50) has been installed, short-circuit terminals 6-7; If stable, permanently short-circuit

If it is unstable, replace the regulator and try again

Fault phenomenon 3: Voltage too high and uncontrollable

Immediately disconnect the excitation shutdown switch (to prevent overexcitation from damaging the equipment)

Check if the E1 tap matches the generator voltage

Check if the wiring of the detection circuit is correct

Perform the Operational Test in Section 4-3, build a test circuit using an isolation transformer and a light bulb, and verify the basic function of the regulator

Fault phenomenon 4: Voltage oscillation/traveling block

Check if the engine speed is stable

Perform stability tuning process (Chapter 5, Section 3)

Replace the regulator to eliminate internal faults

Fault phenomenon 5: Poor adjustment accuracy

If it is XR2002F, check if the frequency compensation has malfunctioned due to a decrease in speed

Ensure that the voltmeter is connected to the same position as the regulator detection

Waveform distortion may cause deviation between the RMS meter and the average voltage detection value of the regulator. It is recommended to use a rectifier instrument for calibration

Preventive maintenance and spare parts management

The regulator is a solid-state electronic device, and maintenance focuses on:

Regular cleaning: prevent the accumulation of dust and moisture

Terminal fastening: All connecting terminals should maintain reliable contact

It is strictly prohibited to use a megohmmeter or voltage tester to perform insulation testing on the regulator, otherwise it may damage the semiconductor devices

The most critical components in the spare parts list are the circuit board assembly (XR2002 is 9 1394 01 100, XR2002F is 9 1394 01 101) and the 500 Ω/25W power resistor (R50). It is recommended to keep at least one circuit board on site to shorten the downtime caused by faults.