Darui Electric recommends for you
The induced overvoltage test of transformers and instrument transformers is an important test to ensure that the quality of transformers meets national standards. The longitudinal insulation induced overvoltage test of transformer windings, including inter-turn, inter-layer, inter-section, and inter-phase insulation, is a crucial item in transformer insulation tests. Due to the special nature of the longitudinal insulation test, it is necessary to apply a frequency multiplier power supply device to increase the test voltage between windings, thereby achieving the purpose of the overvoltage test.
Triple frequency generator is designed and manufactured to meet the above requirements. It has been proven by extensive user use: it is simple to operate, reliable in performance, and can effectively meet the needs of induced overvoltage tests for transformers and instrument transformers.
Triple frequency generator is composed of three single-phase transformers. The primary windings of the three single-phase transformers are connected in a star configuration, and the secondary windings are connected in an open delta. Because the voltage applied to the primary winding is relatively high, the iron core saturates, and the magnetic flux of each single-phase transformer contains both fundamental frequency components and triple frequency components. The open delta connection of the secondary windings cancels out the fundamental frequency components, thereby achieving triple frequency voltage output at the open delta. By connecting an external single-phase voltage regulator to the winding, the triple frequency voltage can be adjusted.
Technical Parameters
1. Input voltage: Three-phase 380V 50HZ
2. Output voltage: Single-phase 0——600V (continuously adjustable)
Frequency: 150HZ
3. Input capacity: 15KVA
Harmonic distortion: ＜5%-8%
4. No-load operation time: ≤5 minutes
5. Duration of test object at rated voltage: 40 seconds 4. Usage method
Equipment maintenance and care:
This equipment should be stored in a ventilated and dry place. This product is free of charge for one year of warranty.
Complete set of products:
1. XGSBP-15KVA/600V induced overvoltage test device
One set 2. User manual
One copy 3. Certificate of conformity (warranty card) one piece
Transportation and storage
■Transportation
When the equipment needs to be transported, it is recommended to use the company's instrument packaging wooden box and shock-absorbing materials to avoid unnecessary damage during transportation and prevent unnecessary losses.
When the equipment is transported without a wooden box, stacking is not allowed. When using the company's instrument packaging box, the maximum stacking layers allowed is two.
During transportation, the instrument panel should face upward.
■Storage
The equipment should be placed indoors in a dry, dust-free, ventilated, and non-corrosive gas environment. Without wooden box packaging, stacking is not allowed.
When storing the equipment, the panel should face upward. And place moisture-proof items at the bottom of the equipment to prevent moisture.
Unpacking and inspection
■Unpacking precautions
Before unpacking, please ensure that the arrow mark on the outer packaging is facing upward. When unpacking, be careful not to hit it forcefully to avoid damaging the equipment. Take out the equipment from the box and keep the outer packaging and shock-absorbing materials, which is convenient for future transportation and storage, and also plays a role in protecting the environment.
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
