Product Details

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Product Features

Simple operation, reliable performance, and can well meet the needs of induced overvoltage withstand tests for transformers and instrument transformers.

Technical Parameters

1. Input voltage: Three-phase 380V, 50Hz;

2. Output voltage: 50—500V (max 750V), 150Hz;

                       100—1000V (max 1500V), 150Hz;

3. Capacity: 1—1000KVA;

4. Waveform: Sine wave, distortion less than 1%;

5. Load characteristics: Suitable for resistive, inductive, and capacitive loads;

Product Aliases

Triple frequency high voltage generator, triple frequency induced voltage generator, triple frequency power supply generator, triple frequency test transformer device, triple frequency induced overvoltage generator, triple frequency test transformer, triple frequency test instrument, triple frequency induced overvoltage tester, voltage transformer frequency multiplier AC withstand voltage tester

The triple frequency generator is designed to meet the requirements of the triple frequency induced overvoltage test and partial discharge test in <><>, <><>, and <> — 1995.

 The induced overvoltage withstand test for transformers and instrument transformers is an important test to verify whether the product meets national standards. The longitudinal insulation induced test of interlayer, inter-turn, segment, and phase-to-phase insulation of windings is an important item to verify whether the windings meet requirements. In order to increase the test voltage of the winding without causing over-saturation of the transformer or instrument transformer core and excessive excitation current, the test frequency needs to be increased, generally to 100Hz—400Hz.

This product is designed according to the Chinese standard 《GB311.1 - 97》 to meet the requirements of the power system for high-voltage instrument transformer frequency multiplier induced overvoltage test equipment. It is widely used for AC withstand voltage tests of series-excited voltage transformers at 35----220KV levels in power systems, to assess the main and auxiliary insulation strength of instrument transformers. It can also be used for induced tests on windings of motors and small transformers; and can also be used as a 150Hz power supply for short-term operation.

Using a three-phase five-limb structure, the working magnetic flux density of the iron core is selected above the saturation magnetic flux density, so that the vector sum of the fundamental potentials (positive sequence vectors) in the secondary winding connected in open delta is zero, and the open delta terminals output the same phase 150Hz third harmonic (zero sequence).



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