Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

First, the installation of 10 kV high-voltage disconnect switches must meet the following requirements. The first step is to select an appropriate installation location, typically near the switchgear power supply in the power system to facilitate operation and maintenance. At the same time, sufficient space must be ensured at the installation site to accommodate equipment placement and wiring.Secondly, equipment safety must be fully considered—for example, lightning protection and explosion-proo

1.Working Principle and Structural Features of GW4-126 DisconnectorThe GW4-126 disconnector is suitable for AC 50/60 Hz power lines with a rated voltage of 110 kV. It is used to disconnect or connect high-voltage circuits under no-load conditions, enabling circuit switching, operational mode changes, and safe electrical isolation of busbars, circuit breakers, and other high-voltage equipment during maintenance. Disconnectors typically feature a clearly visible open point to ensure safe current i

There are many taboos and problematic practices in the installation of distribution boards and cabinets that must be noted. Especially in certain areas, improper operations during installation may lead to serious consequences. For cases where the precautions were not followed, some corrective measures are also provided here to remedy previous mistakes. Let’s follow along and take a look at common installation taboos from manufacturers regarding distribution boxes and cabinets!1. Taboo: Lighting

This paper briefly outlines the advantages and technical characteristics of GIS (Gas-Insulated Switchgear) equipment, and elaborates on several critical quality control points and process control measures during on-site installation. It emphasizes that on-site withstand voltage tests can only partially reflect the overall quality and installation workmanship of GIS equipment. Only by strengthening comprehensive quality control throughout the entire installation process—especially in key areas su

1. Pre-Installation PreparationsBefore commencing installation work, the following preparatory steps must be completed: Organization and Training: Organize training sessions for all construction personnel on relevant regulations,technical standards, and construction procedures. Special emphasis should be placed on safety protocols. Site Survey: Examine the intended location of the circuit breaker, its foundation, and the layout of surrounding equipment and wiring to prevent accidental contact wi

1. Maintaining and Restoring the Factory Insulation ConditionWhen a transformer undergoes factory acceptance tests, its insulation condition is at its optimal state. Thereafter, the insulation condition tends to deteriorate, and the installation phase may be a critical period for sudden degradation. In extreme cases, the dielectric strength may drop to the point of failure, leading to coil burnout immediately upon energization. Under normal circumstances, poor installation quality leaves behind

1. Temperature Control SystemOne of the main causes of transformer failure is insulation damage, and the greatest threat to insulation comes from exceeding the allowable temperature limit of the windings. Therefore, monitoring temperature and implementing alarm systems for transformers in operation are essential. The following introduces the temperature control system using the TTC-300 as an example.1.1 Automatic Cooling FansA thermistor is pre-embedded at the hottest spot of the low-voltage win

Transformer Selection and Configuration Standards1. Importance of Transformer Selection and ConfigurationTransformers play a critical role in power systems. They adjust voltage levels to suit different requirements, enabling electricity generated at power plants to be efficiently transmitted and distributed. Improper transformer selection or configuration can lead to serious issues. For example, if the capacity is too small, the transformer may not support the connected load, causing voltage dro

01 PrefaceIn medium-voltage systems, circuit breakers are indispensable primary components. Vacuum circuit breakers dominate the domestic market. Therefore, correct electrical design is inseparable from the proper selection of vacuum circuit breakers. In this section, we will discuss how to correctly select vacuum circuit breakers and common misconceptions in their selection.02 Interrupting Capacity for Short-Circuit Current Need Not Be Excessively HighThe short-circuit interrupting capacity of

What Is the Spring Operating Mechanism in High- and Medium-Voltage Circuit Breakers?The spring operating mechanism is a critical component in high- and medium-voltage circuit breakers. It uses the elastic potential energy stored in springs to initiate the opening and closing operations of the breaker. The spring is charged by an electric motor. When the breaker operates, the stored energy is released to drive the moving contacts.Key Features: The spring mechanism utilizeselastic energy stored in