Technical Guide
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Application scope and scenarios of portable partial discharge detector
The portable partial discharge detector is mainly used for the insulation status detection of medium and high voltage (usually 3kV and above) electrical equipment. The applicable equipment types, application fields and typical scenarios are as follows: 1. Applicable equipment types Power cables a...Read more -
The Composition and Selection Method of Cable Fault Tester
Modern cable fault testing systems generally adopt the “comprehensive testing method”, using the combination of multiple technologies to achieve precise detection of different types of cable faults. A complete testing system mainly consists of a main control unit, a high-voltage signa...Read more -
Main items and equipment description of transformer handover test
Transformer handover tests are a crucial step to ensure the safe operation of newly installed or overhauled transformers. The test items, corresponding equipment, and execution standards are all clearly defined, with the core reference being GB 50150-2016 “Code for Handover Test of Electric...Read more -
High-voltage switch detection test equipment classification and functions
The high-voltage switch inspection equipment is a professional instrument used in the power system to conduct state assessment, fault diagnosis, and performance testing of key equipment such as high-voltage circuit breakers, disconnectors, and load switches. It plays a crucial role in ensuring th...Read more -
Notes on the Selection and Application of Ultra-Light Test Transformers
I. Main Features Light weight, small size: As the most prominent feature, by adopting new materials (such as fiberglass epoxy tubes) and optimizing the design, the equipment weight can be reduced to 1/5 to 1/3 of the traditional oil-immersed transformers of the same capacity. Dry design: Mostly a...Read more -
The inductive and capacitive resistances in series resonance
In the power system, series resonance is a common circuit phenomenon that occurs in a series circuit composed of inductors, capacitors and resistors. When the inductive reactance and capacitive reactance in the circuit are equal, resonance will occur in the circuit, and the circuit will exhibit p...Read more -
The application and scope of 10kVA power frequency withstand voltage test equipment
The 0kVA power frequency withstand voltage test equipment is an AC high-voltage generating device with an output capacity of 10 kilovolt-amperes (kVA) and a frequency of 50Hz (or 60Hz). I. Core Applications This device is used to conduct withstand voltage strength tests on the main insulation of ...Read more -
The application of insulating bases in series resonance
During the operation of the power system, the phenomenon of series resonance has always been a key concern for engineering technicians. As a special type of electrical resonance, series resonance not only affects the stable operation of the system, but also may cause equipment damage and even tri...Read more -
The purpose and procedures of vacuum switch vacuum degree tester tests
I. Invisibility Vacuum interrupters are fully sealed components. Even if the internal vacuum level deteriorates severely from 10⁻⁵ Pa to 10⁻² Pa, there may be no visible abnormalities on the exterior, and they can still perform normal opening and closing operations under low load conditions. With...Read more -
The working principle of the series resonant voltage converter
The series resonant voltage converter is an efficient electrical energy conversion device. Its working principle is based on the characteristics of resonant circuits. This converter achieves efficient voltage conversion and effective energy transmission by ingeniously utilizing the resonant chara...Read more -
Test equipment and standard procedures for AC withstand voltage tests of 35kV and below cables
Due to the large capacitance of the cables, the power capacity required for the power frequency test scheme is extremely high, and the equipment is relatively bulky, making it difficult to implement in on-site test scenarios. Therefore, the frequency-modulated resonant withstand voltage test equi...Read more -
The principle and standard procedures of insulating oil breakdown voltage test
1. Definition The breakdown voltage test of insulating oil refers to applying a continuously increasing alternating voltage to the insulating oil sample under specified experimental conditions until the insulation performance between the two electrodes in the oil fails (a breakdown occurs, formin...Read more