Wires and cables are the focus of inspection by relevant departments. Many friends may have questions. Why? Because wires and cables are products that can affect personal and property safety. Wires and cables are also regularly checked by special staff. If a fault is found, it is necessary to quickly…

Loop resistanceLoop resistance is also a kind of resistance value, which is the main technical parameter to evaluate the performance of conductive loop system. When its value is within the normal range, it is a parameter that can characterize the normality of the conductive circuit. For different data, each type…

The 0.1Hz ultra-low frequency high voltage generator is a new ultra-low frequency AC testing device with sine wave or cosine square wave as the output source. What are the advantages of the application of 0.1Hz ultra-low frequency high voltage generator for the nondestructive insulation and withstand voltage test of power…

The purpose of organizing the type test is to prove the ability and ensure the accuracy of the rated characteristics of the circuit breaker. Such tests are carried out in specially built testing laboratories.1. Mechanical test - this is a type of mechanical capability test involving repeated opening and closing…

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

1、Fault phenomenon: the loop resistance tester is connected to 220V AC power supply, the fan has no running sound, press the "test switch", and the ammeter and micro ohmmeter have no display.Cause: 220V AC power supply is blocked, and the fuse is not installed or blown.Troubleshooting: check and eliminate. (the…

Circuit breaker, also known as high-voltage switch, is an important part of the stable operation of power system. Its performance directly affects the stability of power system. Therefore, after the circuit breaker is installed and put into operation, the mechanical performance test should be carried out regularly. There are many…

In terms of policy, China's power system implements a two-part electricity price: in addition to charging the fees measured by the metering device, it also charges basic electricity fees according to the transformer capacity, and larger users have to pay a one-time capacity increase fee when putting the transformer into…

1.Characteristics of series resonanceThe circuit is purely resistive, and the terminal voltage is in phase with the total current. At this time, the impedance is the smallest and the current is the largest. High voltage may be generated on the inductance and capacitance many times larger than the power supply…

CTP-1000c tester is a new generation of CT and Pt testing instruments developed by our company. It adopts high-performance DSP and FPGA and advanced manufacturing technology to ensure stable and reliable product performance, complete functions, high automation and high testing efficiency. It is a professional testing instrument for transformer in…