Zn28-12 Vacuum Circuit Breaker

• Breaking Capacity: High Voltage Circuit Breakers
• Operation: Electric Type
• Speed: High-Speed Circuit Breaker
• Model NO.: ZN28-12 Vacuum Circuit Breaker
• Arc-extinguishing Medium: Vacuum
• Installation: Insert
• Structure: Vcb
• Poles Number: 3
• Type: Circuit Breaker
• Function: Conventional Circuit Breaker, Circuit-Breaker Failure Protection, Overcurrent Protection
• Certification: ISO9001-2000
• Transport Package: Pallet
• Trademark: Kaisaier
• Origin: Prc
• HS Code: 8535210000
• Production Capacity: 10000 Pieces/Year

Product Description

Lead Time:
Customized products: 30 days
    Normal products:    10 days
Advantages:
 Exported to India, Vietnam, Pakistan, Laos, Azerbaijan, Cameroon, Nigeria and other countries.

Outside Drawing Dimension:
 


Technical Data:

ZN28-12   Main Technical Data
1	Rated Frequency	Hz	50/60
2	Rated Voltage	kV	12
3	Short-time(1min) Power-frequency Withstand Voltage	kV	42/48
4	Lightning Impulse Withstand Voltage(Peak)	kV	75/85
5	Rated Current	A	630~3150
6	Rated Short-circuit Breaking Current	kA	20~40
7	Mechanical Endurance	Operations	≥10000
8	Switching Operations of Rated Short-circuit Breaking Current	Operations	≥30
9	Average Opening Speed (first 6 mm)	m/s	0.9~1.5
10	Average Closing Speed (last 6 mm)	m/s	0.4~0.8
11	Clearance Between Open Contacts	mm	9±1  (11±1)
12	Contact Over Trip	mm	3.5±1
13	Contact Bounce Duration at Closing Operation	ms	≤2
14	Out of Simultaneity of Contact Closing and Opening	ms	≤2
15	Maximum Rebound During Opening	mm	≤2
16	Closing Time	ms	35~70
17	Opening Time	ms	20~50
18	Energy Storage Time	s	≤15
19	Rated Operating Voltage	V	AC 110/220
			DC 110/220
20	Rated Operation Sequence	O-0.3s-CO-180S-CO
		O-180s-CO-180S-CO