The ultra-low frequency withstand voltage test is characterized by no damage to the tested cable, and it can also test the cable that is aging but can still be used. Therefore, it is a non-destructive withstand voltage test method.This test is more accurate than the DC high voltage test in…

Transformer winding deformation refers to the irreversible change of the size and shape of the winding due to mechanical force and electromotive force. It includes changes in axial and radial dimensions, valve body displacement, winding distortion, bulging and inter turn short circuit. The reason is that the transformer will inevitably…

1. Insulation resistance testInsulation resistance is the most basic insulation index of electrical equipment and circuits. When a DC voltage is applied to the dielectric, after a certain period of time, the resistance corresponding to the leakage current flowing through the dielectric is called insulation resistance.When the DC high voltage…

Kvtester specializes in producing transformer capacity tester (also known as transformer no-load tester). Next, let's share how to calculate the capacity of voltage regulator used in no-load test of power transformer?Transformer no-load test is a test to measure the no-load loss and no-load current of the transformer by applying the…

Developed in the early 20th century, insulation resistance (IR) test is the oldest and most widely used test to evaluate insulation quality. Insulation resistance test is the second test required by the electrical safety test standard. Insulation resistance test includes measuring the insulation resistance of the tested equipment, and the…

On April 12, the 10kV underground cable of Wuhan Jiaotong school broke down, resulting in power failure and darkness in all student dormitories. As the direct buried cable is adopted in the campus, the cable direction in the campus is complex, and the two units previously contacted by the school…

Loop resistance tester will inevitably encounter various abnormal problems in our daily use. Let's talk about how to solve these abnormal problems.1、 Phenomenon: ZC-302 loop resistance tester is connected to AC 220V AC power supply, the fan has no running sound, and press the "test switch", and the ammeter and…

This product is developed by using modern electronic technology and tooling technology under the guidance of electromagnetic field theory, according to the field identification problems of multiple cables urgently needed to be solved by high-voltage cable construction and installation and maintenance personnel. According to the market feedback and customer demand,…

ZC-610C high precision three-phase phase voltammeter is an instrument for measuring three-phase volt ampere electrical parameters.   The host can complete the three-phase voltage, current, phase, frequency, power, power factor, three-phase imbalance and other electrical parameters of high-precision measurement.         Function description This function displays the amplitude…

ZC-610A digital double clamp phase voltammeter is a kind of high precision, low price, hand-held, dual channel input measuring instrument designed for on-site measurement of voltage, current and phase. It is convenient to measure the phase between U-U, I-I and U-I, distinguish the phase sequence of inductive circuit, capacitive circuit…