33kv Outdoor HV Vacuum Circuit Breaker with Central Operating Mechanism

• Breaking Capacity: High Voltage Circuit Breakers
• Operation: Electric Type
• Speed: Normal Type Circuit Breaker
• Arc-extinguishing Medium: Vacuum
• Installation: Fixed
• Structure: MCCB
• Model NO.: ZW7-40.5/1250-31.5
• Poles Number: 3
• Type: Circuit Breaker
• Function: Conventional Circuit Breaker, Circuit-Breaker Failure Protection, Overcurrent Protection, OVP(Overvoltage Protection)
• Certification: VDE, ISO9001-2000, CE, CCC
• Voltage: 40.5kv
• Transport Package: Non-Solid Wood Case
• Specification: 1820mm*260mm*1865mm
• Trademark: Longxiang
• Origin: Baoji, Shaanxi China
• HS Code: 85352100
• Production Capacity: 18000 Sets/Year

Product Description

33kv Outdoor HV Vacuum Circuit Breaker with Central Operating Mechanism


The overall drawing & Technical Characteristics

*New type 33kV outdoor VCB , miniaturized with more compact dimensions and easy for sea freight

the overall drawing :


Main technical specifications for spring mechanism

NO.	Name			Unit	Dada
1	rated voltage			kV	40.5
2	rated current			A	1250 1600 2000
3	rated frequency			Hz	50
4	rated short-circuit breaking current			kA	20 25 31.5
5	rated short-circuit closing current			kA	50 63 80
6	rated peak withstand current			kA	50 63 80
7	rated short-time withstand current			kA	20 25 31.5
8	rated short-circuit duration			s	4
9	rated operation sequence				0-0.3s-CO-180s-CO
10	short-circuit breaking current in remote ground fault condition			kA	17.54  21.93  27.6
11	rated  insulation leval	1 min power frequency withstand voltage(peak value)	dry test	kV	95
			wet test	kV	85
		rated lighting impluse withstand voltage		kV	185
12	opening time			ms	<=100
13	mechanical endurance			cycles	10000
14	breaking operations of rated short circuit breaking current			cycles	20

Main technical datesheet for VCB( spring mechanism)

No.		Name	Unit	Data
1	clearance between open contacts		mm	20±2(central type)
				22±2(lateral type)
2	over travel of contacts		mm	4±1
3	allowed wear thickness of contacts		mm	3
4	average closing speed		m/s	0.6±0.2
5	average opening speed (befiore contact oil buffer)		m/s	1.6±0.2
6	contact bouncing duration at closing operation		ms	<=3(31.5kA)      <=3(20~25kA)
7	synchronism of closing contact		ms	<=2
8	un-synchronism of opening contact		ms	<=2
9	bouncing amplitude of opening contact		mm	<=3
10	closing time		ms	50<=t<=120
11	opening time	max and rated voltage	ms	20<=t<=60
		min rated voltage	ms	20<=t<=60
12	closing-opening time		ms	<=100
13	contact pressure		N	3100±200
14	main circuit resistance		μΩ	<=50(without transformer)

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