Hebei Dual Canopy Mechanic Electrical Engineering Co., Ltd. is one of the leading manufacturers and suppliers of transformer tap changer test equipment oltc tester in China. Please feel free to wholesale discount products for sale here and get quotation from our factory. Customized orders are welcome.
Products Description
Transformer Tap Changer Test Equipment OLTA Tester are industrial devices used for testing the performance of power transformers' on-load tap changers. Their main functions include testing parameters such as transition resistance and transition time, and they support both no-winding and winding measurement.This instrument has functions of analyzing, storing and printing the measured data. It solves the problem of the current lagging measurement methods for on-load tap changers of power transformers and the lack of dedicated testing means. It can promptly diagnose potential faults of the on-load tap changer during preventive tests of power equipment and major transformer overhauls, which is of great significance for improving the reliability of power system operation.
Product parameters
1. Three independent test power supplies, max output current 0.5A
2. Instrument sets sampling rate from 10 to 20 KHz
4. Transition resistance measurement range: Y/Δ type transformer 1 - 40Ω
Y type transformer 1 - 20Ω
5. Measurement accuracy: 1 - 5Ω, Δ = ±10%
1 - 5Ω, Δ = ±10%
5 - 40Ω, Δ = ±5%
6. Display: 240×128T, T6963C controller
Factory Information
Dual Canopy Mechanical Electrical Engineering Co., Ltd. stands as a preeminent high-tech enterprise at the forefront of electrical system automation and precision testing.
Our comprehensive product portfolio encompasses a diverse range of essential electrical equipment. This includes Oil-immersed and Dry-type Transformers, which are designed to meet the varying needs of different applications; the Transformer Oil Test Series, which ensures the quality and reliability of transformer oil; the Transformer Test Series, which provides comprehensive testing solutions for transformers; and the High Voltage Tester Series, which is essential for ensuring safety and performance in high-voltage environments. These products are specifically tailored to serve a broad spectrum of industries, such as power systems, electrified railways, shipbuilding, telecommunications, municipal management, and other large-scale enterprises, where reliability and precision are of utmost importance.
FAQ
01.Operation method
1. Wiring check: Ensure that the connection between the tester and the transformer tap changer complies with the requirements of the "Power Equipment Acceptance and Preventive Test Regulations";
2. Parameter setting: Input the test type and threshold parameters through the instrument interface;
3. Automatic analysis: The instrument collects data and generates reports on the transition waveform, transition time, instantaneous transition resistance values, and three-phase synchronization, etc.
02.Fault diagnosis
Contact wear: Abnormal echoes or oscillations appear in the waveforms.
Transition resistance value: Measures parameters such as the transition waveform, transition time, transition resistance values at each instant, and three-phase synchronization of the on-load tap changer of the transformer;
Mechanical jamming: There is a significant difference in three-phase synchronization.
03.Test items and test methods
Contact resistance (measured during assembly), transition resistance
Measurement, transition time measurement Test method
When removing the transformer housing, a double-arm bridge can be used to measure the contact resistance of the no-load voltage regulating switch and the on-load voltage regulating switch selection switch, as well as the contact resistance and transition resistance of the switching switch. The on-load switching characteristic tester can be used to measure the switching waveform and switching time of the switching switch when it is not connected to the winding. And the same applies to the measurement of the switching waveform, switching time and synchronization when the switching switch is connected to the winding.
04.Analysis and judgment of the test results
For the on-load tap changer, the transition resistance, contact resistance and switching time should all meet the requirements of the manufacturer. The allowable deviation of the transition resistance is ±10% of the rated value, and the contact resistance should be less than 500 μΩ.
The switching test can check whether the contacts are properly connected, whether the transition resistance is broken, and whether the synchronization and duration of the three-phase switching are correct.
05.Notes for Attention
The measurement should be conducted twice, from the single gear to the double gear and from the double gear to the single gear.
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