EVH4-15/T6300-80F Indoor High Voltage AC Generator Circuit BreakerDetailed product description：

The EVH4-15/T6300-80F indoor high-voltage AC generator circuit breaker is a three-phase AC 50Hz indoor device with a rated voltage of 15kV and a rated current of 6300A. It is suitable for installation between the generator and the step-up transformer or between the generator and the power plant auxiliary transformer, and can be used for the protection and control of power plant generator facilities. The EVH4-15 indoor high-voltage AC generator circuit breaker is a new generation high-capacity and high-performance product developed by Tianshui Changcheng Switchgear Co., Ltd. based on decades of experience in designing and manufacturing vacuum circuit breakers.

Product Structure Features
EVH4-15 type vacuum circuit breaker suitable for high voltage electrical disconnection system
1. The fixed installation of the vacuum circuit breaker at the outlet of the EVH4-15/T6300-80 (F) generator has a rated current of up to 6300A and a rated short-circuit breaking current of up to 80kA under natural air cooling.
2. The vacuum circuit breaker at the outlet of the EVH4-15/T5000-63 (F) generator has a removable handcart structure and can withstand a rated current of 5500A and a rated short-circuit breaking current of 63kA under natural air cooling.
3. The main circuit adopts a large creepage distance, longitudinal magnetic field contact structure, and a dedicated generator outlet vacuum arc extinguishing chamber. A voltage equalization ring with a uniform electric field is designed between the main circuit and the ground.
4. The main circuit of the vacuum circuit breaker at the outlet of the EVH4-15 generator adopts a pure copper welded structure for the upper and lower outgoing lines, reducing the contact resistance caused by the assembled structure. Use analysis software to analyze the current density of the main circuit and make it uniform; The surface area of the heat sink.
5. Adopting the innovative design of the GLS type spring operated mechanism specifically designed for EVH series vacuum circuit breakers, the mechanical performance is stable and reliable.
6. The transmission structure adopts an optimized slider straightening mechanism to ensure excellent mechanical characteristics and stable mechanical parameters.

Technical parameters of EVH4-15/T6300-80F indoor high-voltage AC generator circuit breaker

serial number	parameter name					unit	Numerical value
one	rated voltage					kV	fifteen
two	Rated insulation level (Phase to phase, ground to ground, fracture surface)			1-minute power frequency withstand voltage (effective value)	Alternating and facing the ground		fifty
					fracture		fifty-nine
				Lightning impulse withstand voltage (peak value)	Alternating and facing the ground		ninety
					fracture		one hundred and two
three	1-minute power frequency withstand voltage of auxiliary circuit					V	two thousand
four	rated frequency					Hz	fifty
five	rated current					A	6300*
six	temperature rise	Static end of vacuum arc extinguishing chamber				℃	seventy-five
		Vacuum arc extinguishing chamber moving end					seventy-five
		Conductive clamp block for moving contact					seventy-five
		Soft connection terminal					seventy-five
		Outgoing terminal on the circuit breaker					sixty-five
		Bottom terminal of circuit breaker					sixty-five
seven	Rated short-time withstand current					kA	eighty
eight	Rated peak withstand current						two hundred and twenty
nine	Rated short-circuit duration					s	four
ten	Rated short-circuit breaking current					kA	eighty
eleven	DC component of rated short-circuit breaking current						77%
twelve	Rated short-circuit closing current (peak)					kA	two hundred and twenty
thirteen	Rated operating sequence						CO-30min-CO
fourteen	Rated out of step symmetrical breaking current					kA	40 (DC component ≤ 20%)
fifteen	Rated asynchronous asymmetric breaking current						40 (DC component ≥ 77%)
sixteen	Rated Out of Step Closing Current (Peak)						fifty-six point five
seventeen	Rated load (6300A) opening and closing times					time	fifty
eighteen	System source TRV		Expected transient recovery voltage rise rate			kV/μs	four
			peak voltage			kV	twenty-seven point six
			Initial polar coefficient				one point five
nineteen	Generator source TRV		Expected transient recovery voltage rise rate			kV/μs	one point eight
			peak voltage			kV	twenty-seven point six
			Initial polar coefficient				one point five
twenty	Combination and division time					ms	one hundred
twenty-one	Rated breaking time					ms	≤60
twenty-two	mechanical life					time	five thousand
twenty-three	Allowable cumulative thickness of wear for dynamic and static contacts					mm	three
twenty-four	Electrical lifespan					time	five