Design of IEC standard ring main unit
The design of IEC ring network cabinet, the current Saudi Arabia, Russia and other countries for China-made ring network cabinet demand, various manufacturers are designing related products. IEC standard ring network cabinet requirements generally have a common box, mechanical key interlocking, internal arc pressure release, cable voltage test dedicated interface, outdoor box and its size, […]
Electric operation of medium voltage switchgear
Medium-voltage switchgear circuit breaker, equipped with electric remote breaking and closing operation is a basic requirement, spring actuator mechanism circuit breaker to remote breaking and closing, first of all, electric energy storage, the general circuit breaker are equipped with circuit breaker in the closing (regardless of manual or electric), immediately after the energy storage action, […]
Environmentally friendly transformer box
Currently, environmentally friendly vegetable oil has been applied to high-voltage 220/550kV transformers, achieving good electrical performance and environmental performance. The American box variable seals the switch, transformer and other high-voltage circuits inside the oil tank, which has a compact structure, and can be environmentally friendly and safe through the use of vegetable oil substitution. Realise […]
“Five-Proof” Blocking and Typical Failure Analysis of High Voltage Switchgear
1 Composition of high voltage switchgear The switchgear cabinet consists of two parts: the cabinet and the handcart. High-voltage switchgear is mainly divided into four parts: busbar room, cable room, handcart (circuit breaker) room, relay instrumentation room. The upper part of the back of the switchgear cabinet is the busbar room, which holds the high-voltage […]
Lifespan of switchgear
Excessive temperature rise, insulation aging, and institutional wear are the three main forms of switchgear failure. Temperature rise and insulation are closely related, one of the main purposes of limiting the temperature rise is to avoid insulation problems, air insulated metal-enclosed switchgear, long term use, due to increased temperature leading to thermal runaway, accelerated insulation […]
Transformer oil seepage hazards and treatment methods
Transformer seepage leakage of oil specific hazards 1. transformer oil seepage phenomenon not only seriously affects the appearance, but also because the transformer needs to be shut down to eliminate the leakage and cause economic losses. If the transformer ground base on the more oil, may also become a fire hazard. 2. oil seepage will […]
What is solid insulation ring network cabinet, what are the features
Solid insulated ring network cabinet, is the use of solid insulating materials as the main insulating medium of the ring network cabinet, the vacuum interrupter and its conductive connections, isolation switches, grounding switches, main bus and other dominant electrical circuits, single or combination of solid insulating media wrapped and encapsulated into a solid insulating medium […]
Environmentally friendly gas insulated ring main unit
Abstract: SF6 gas is a restricted greenhouse gas in the Kyoto Protocol. Some countries and regions have proposed control measures on the use of greenhouse gases, such as the Clean Energy Future Plan launched by Australia, and the EU has banned the use of ≤24kV primary and secondary distribution switchgear with GWP ≥10 fluorinated gases […]
Medium voltage bushing
Our commonly used 24/40.5kV switchgear contact boxes and through-wall bushings basically use internal and external shielding forms, i.e. capacitive voltage divider bus bushings, which are bus bushings made by utilizing the principle of capacitive equipotential shielding and voltage divider to effectively reduce the size of the bushings and withstand higher lightning impulse withstand voltages and […]
Brief introduction of gas-filled cabinet and ring network cabinet
Gas-filled cabinet C-GIS is the abbreviation of gas-insulated switchgear, which is defined according to the form of main switch insulation, corresponding to air-insulated switchgear and solid-insulated switchgear. That is, the switchgear of the switchgear cabinet, circuit breakers and connections and other main circuits are sealed inside the gas box filled with insulating gas, the external […]