Zn 28-12 Series Vacuum Circuit Breaker

• Customization: Available
• Breaking Capacity: High Voltage Circuit Breakers
• Speed: High-Speed Circuit Breaker
• Model NO.: ZN28-12
• Arc-extinguishing Medium: Vacuum
• Type: Circuit Breaker
• Function: Circuit-Breaker Failure Protection
• Certification: ISO9001-2000, CE
• Transport Package: Export Standard Package or as Client Requirement
• Specification: ISO9001: 2008
• Trademark: L&R or according to customer′s requirement
• Origin: Wenzhou, Zhejiang
• Production Capacity: 20, 000PCS/Month

Product Description

Basic info.:
Certification:ISO9001 ; CE
Export Markets:Global
Packaging: standard package or cilent's requirment
Brand name: L&R or as per clients' requirements

Main technical parameters:

NO.	Designation	Unit	Data
			20KA	252	\ 31.5kA	40kA
1	Rated Volt(KV)	kV
2	Rated Curreni(KV)	A	630. 1000	1250. 1600 1250. 1250		1600. 1250
			1250		200.2500	3150
3	Rated short circuit breaking current	kA	20	25	31.5	31.5
4	Rated short circuit opening & closing cufrent(summit)	kA	50	63	80	80
6	Ratod commit withstand curront	kA	60	63	80	80
6	4S rated short circuit v/ithstand current	kA	20	25	31.5	31.5
7	frxJustriai-frequency withstand ^uge(Rated bceaking aroxxi)	kV	Fratuce 48
	Rstcc ih$ul3ling icvoi n . impure winstand vwage(Kated weakcg around)		Fratuce 48
8	Rated operating sequence		0pen-0.3s-ctose & open- 180s & open
9	Machanism Life	Time			1000
w	Rated short circuit breaking curreni & times	Time		30		20
11	Rated closing voli(DC) of operating mechanism	V	110.220		200
12	Rated ctosing curreni(DC) o« operating mechanism	A		71		128
13	Rated opening vdt(DC) of ope<aiing mechanism	V	3.0. 1.5
14	Rated opening current(DC) of operating mechanism	A	110. 220
15	Contactoe Distance	mm	11
16	Exwa-Strcke(cor>tactoe spring length)	mm	4
17	Un-meaning property o! three-phase opening, closing brake	ms	2
18	Sprang time of coniacto* closeO	ms	2
19	Average opening brake(6mm height)	m/s	1.2
20	Average opening speed	m/s	0.6
21	Under max operaiing volt	s	0.08
	Under min operating volt		0.06
22	Closing time	s	0.02
23	Main circuit resistance of each phase
24	Permitted wear thickness of movable and stationary contactor	mm	3
25	Buffering slrokr of oil butter	mm	10

Our Services 
1. Rich experience in ODM  and OEM  
2. Excellent One-stop service
3. High Quality Precision Customized forging & Casting services
4. The best price
5. Strict quality control
6. We wormly welcome you come to visit our factory and seek further cooperation