Induced Over Voltage Withstand Test Set For Transformer
Huazheng Electric Manufacturing (Baoding) Co., Ltd. is one of the leading manufacturers and suppliers of induced over voltage withstand test set for transformer in China. Please feel free to buy high quality equipment for sale here from our factory. Good service and reasonable price are available.
Basic Principles
The HZ-3 induced overvoltage withstand test equipment is designed to meet the requirements of high-voltage transformers in power systems. It is widely used for AC withstand voltage testing of voltage transformers rated from 35 kV to 220 kV, primarily to assess the longitudinal insulation strength of transformers. Additionally, it can perform induced overvoltage tests on motors and transformer windings, and can also supply short-term 150 Hz power.
Main Function
Widely used for frequency doubling induced voltage withstand testing of voltage transformers.
Conducts split‑phase frequency induced voltage withstand testing of power transformers.
Performs frequency doubling induced voltage testing on other inductive coil type electrical products.
Technical Parameters
1.Input voltage: three-phase 380V 50HZ
2.Output voltage: single-phase 300V, 500V, 800V, 1000V single-phase 150HZ
(external booster transformer is required if higher voltage is required)
3.Output capacity: 20% of product capacity
4.Harmonic distortion: < 5%-8%
5.No load running time: less than 5 minutes
6.Duration under rated voltage: 40 seconds
Matters Needing Attention In The Test
1.The device is provided with over-current protection, which is set at 80% of the rated output current at the time of delivery.When the over-current or breakdown phenomenon occurs during the pressure boost process, the over-current protection action can protect the tested product and not cause the accident expansion of the tested product. At this time, the three-phase power supply should be cut off to avoid damage to the device.
2.In the test process, if the power capacity of the tested product is not large, the compensation reactor generally does not need to access the circuit.If the capacitor current of the tested product is too large, the two ends of the compensation reactor should be parallel with the two ends of the tested product (or another winding) for current compensation, so as to improve the power factor of the entire test circuit and reduce the output current.
3.The triplex generator is operated under the condition of oversaturation, so the time to connect the three-phase circuit should be as short as possible, generally no more than five minutes.When the test subject is tested, the test time shall not exceed 40 seconds when the test frequency is 150Hz.
4.The reactor equipped with the tripling frequency generating device is only allowed to be used when testing the voltage transformer. When the voltage of the tested product exceeds a certain range, the reactor should be additionally selected (it can be explained when ordering).
Product Completeness
1. One set of triplex power generation device
2. Complete 1 set of connecting wires
3. One delivery test report
4. 1 product manual
5. One copy of product qualification certificate/warranty card
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