Product Details

Power Qualification Instrument Induction Withstand Voltage Test Device 5kVA/360V Precautions:

1. This equipment is designed for short-term operation, so it is not allowed to operate at rated capacity for extended periods, especially not exceeding the rated current to prevent overheating.

2. For newly installed or long-term unused transformers, before operation, use a 1500 megohm meter to measure the insulation resistance between coils and between coils and ground. Only when the resistance is not less than 0.5 megohms can it be used.

3. During use, the current-raising transformer and the operation console must be reliably grounded to ensure safety.

4. When raising current, do it slowly and evenly, and avoid excessive vibration during handling.

5. The contact surface between the voltage regulator and the brush should be kept clean. If necessary, wipe it clean with cotton yarn dipped in 90% alcohol.

Product Aliases

Triple-frequency induction withstand voltage device, triple-frequency generator, triple-frequency induced voltage generator, triple-frequency test transformer device, triple-frequency induction withstand voltage generator, triple-frequency test transformer, triple-frequency tester, triple-frequency induction withstand voltage tester, triple-frequency power generator

Product Features

Three single-phase transformers have their primary sides connected in a star configuration and secondary sides in an open delta. When a symmetrical three-phase sinusoidal power supply is applied to the primary side and the voltage is raised to saturate the iron core magnetic circuit, the third harmonic component in the magnetic flux increases, correspondingly increasing the third harmonic voltage induced in the iron core coil.

The 150 Hz (triple power frequency) induced voltage output from the secondary side of the open delta generator serves as the triple-frequency test power supply voltage.

When the triple-frequency generator is loaded, its current changes from inductive to capacitive. Due to the low power factor, the generator's efficiency is relatively low, generally only about 20%. Therefore, a reactor can be connected to an idle winding of the test object for current compensation to improve the power factor of the entire test circuit.

Usage Method:

1. Connect the circuit according to the working principle diagram. The transformer housing and operation console must be well grounded.

2. Connect the power supply, the green indicator light on the operation console turns on, then press the start button, the red indicator light turns on, indicating the current-raising device is waiting to raise current.

3. Rotate the voltage regulator clockwise evenly to increase the output current indication until the required large current. To ensure test accuracy, a standard ammeter can be connected in series at the meter terminals.

4. During the test, if any abnormal situation occurs, immediately cut off the power supply, investigate the cause, and then proceed with the test.

5. After the test, the voltage regulator must be returned to zero, press the stop button to cut off the power; only after cutting off the working power can the test wiring be removed to ensure safety.

Power Qualification Instrument Induction Withstand Voltage Test Device 5kVA/360V Product Specifications

1. Output capacity: 20% of product capacity

2. Input voltage: 380V±5% three-phase four-wire 50HZ

3. Output voltage: 0~300V, 500V, 800V, 1000V single-phase 150HZ (if higher voltage is needed, an external step-up transformer is required)

4. Waveform distortion: <5%

5. No-load operation time: ≤5 minutes

Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.