EVH1A-40.5/T2500-31.5 type solid sealed pole vacuum circuit breakerDetailed product description：

EVH1A-40.5/T2500-31.5 Solid Sealed Pole Vacuum Circuit Breaker

The EVH1A-40.5/T2500-31.5 solid sealed pole vacuum circuit breaker is an indoor device with a rated voltage of 40.5kV and a three-phase AC frequency of 50Hz. It is designed in accordance with the State Grid Corporation of China's material procurement standard (2009 edition) "General Technical Specification for 12kV, 24kV, 40.5kV High Voltage Switchgear" and can be used for control and protection of electrical facilities in industrial and mining areas, enterprises, power plants, and substations.
This product complies with the relevant provisions of GB1984-2003 "High Voltage AC Circuit Breakers", JB3855 "Indoor High Voltage AC Vacuum Circuit Breakers", DL403 "Technical Conditions for Ordering 10-35kV Indoor High Voltage Vacuum Circuit Breakers" and IEC62271-100:2001 "High Voltage AC Circuit Breakers". The technical performance and parameters of this product meet the requirements of the centralized procurement technical specifications of State Grid Corporation of China.
The EVH1A-40.5/T2500-31.5 series indoor high-voltage solid sealed pole vacuum circuit breaker can be installed in a truck mounted switchgear. This circuit breaker has the advantages of long service life, simple maintenance, no pollution, no explosion hazard, low noise, and is suitable for harsh working conditions such as frequent operation.

Product Structure Features
The EVH1A-40.5/T2500-31.5 solid sealed pole vacuum circuit breaker arranges the arc extinguishing chamber and the operating mechanism on a shared frame, that is, an integrated layout. This structural design can make the operating performance of the operating mechanism more in line with the required performance of the arc extinguishing chamber opening and closing, reduce unnecessary intermediate transmission links, lower energy consumption and noise, and make the operating performance of the circuit breaker more reliable. The EVH1A-40.5/T2500-31.5 indoor high-voltage vacuum circuit breaker can be installed in a truck mounted switchgear.
The main circuit of the circuit breaker adopts a structure in which a vacuum arc extinguishing chamber is sealed inside the insulated pole. The vacuum arc extinguishing chamber is longitudinally sealed inside a tubular insulation cylinder, which is cast from epoxy resin using APG technology. This structural design not only prevents the vacuum arc extinguishing chamber from being damaged by external factors, but also ensures that it can exhibit high resistance to voltage effects even in humid, hot, and severely polluted environments.
The operating mechanism is an independent spring energy storage type, with manual and electric energy storage functions. The operating mechanism is placed inside the chassis in front of the arc extinguishing chamber and has a clamp plate structure.

Technical parameters of EVH1A-40.5/T2500-31.5 fixed sealed pole vacuum circuit breaker

serial number	Project			unit	Rated parameters
one	rated voltage			kV	forty point five
two	Rated insulation level	1-minute power frequency withstand voltage (effective value) for ground, phase to phase, and ordinary fracture surfaces		kV	ninety-five
		Lightning impulse withstand voltage (peak value) for ground, phase to phase, and ordinary fracture surfaces			one hundred and eighty-five
three	rated frequency			Hz	fifty
four	rated current			A	630, 1250, 1600, 2000, 2500
five	Rated short-time withstand current			kA	thirty-one point five
six	Rated peak withstand current			kA	eighty
seven	Rated short-circuit current duration			s	four
eight	Rated short-circuit closing current (peak)			kA	eighty
nine	Rated short-circuit breaking current		Effective value of communication component	kA	thirty-one point five
			Effective value of DC component		48%
ten	Rated operating sequence				Split -0.3s - Split -180s - Split - Split
eleven	Rated out of step breaking current			kA	eight
twelve	Rated out of phase breaking current				twenty-seven point three