Zn28-12 Series Indoor Fixed High-Voltage Vacuum Circuit Breaker

ZN28(A)-12 series indoor high-voltage vacuum circuit breaker is a kind of three-phase indoor high-voltage switchgear of rated voltage 12kV and AC 50Hz,

Product Details Company Profile

Description

Model NO.: ZN28-12
Operation: Manual Type
Arc-extinguishing Medium: Vacuum
Structure: Moulded Case Circuit Breaker
Certification: ISO9001-2000
Function: Circuit-Breaker Failure Protection
Specification: 12KV
HS Code: 8535210000

Breaking Capacity: High Voltage Circuit Breakers
Speed: High-Speed Circuit Breaker
Installation: Fixed
Poles Number: 1
Type: Circuit Breaker
Trademark: ZHON
Origin: Zhejiang

ZN28(A)-12 series indoor high-voltage vacuum circuit breaker is a kind of three-phase indoor high-voltage switchgear of rated voltage 12kV and AC 50Hz,

Item			Unit	Parameter
Rated Voltage			kV	12
Rated Current			A	630-1000	630-1000	1250-1600			1600-2000
				1250	1250	2000-2500			3150
Rated Short-circuit Breaking Current			kA	20	25	31.5			40
Rated Short-circuit Making Current (Peak)			kA	50	63	80			100
Rated Peak Withstand Current			kA	50	63	80			100
Rated Short-time Withstand Current			kA	20	25	31.5			40
Rated Insulation Level	Power Frequency Withstand Voltage (Rated Breaking Before and After)		kV	42 (Break 48)
	Lightning Impulse Withstand Voltage (Rated Breaking Before and After)		kV	75 (Break 84)
Rated Operating Sequence				O-0.3s-C O-180s-CO
Mechanical Life			times	10000
Rated Short-circuit Current Breaking Times			times	50
Rated Closing Voltage of Operator (DC)			V	110, 220			220
Rated Closing Current of Operator (DC)			A	71				128
Rated Opening Voltage of Operator (DC)			V	110, 220
Rated Opening Current of Operator (DC)			A	3.0, 1.5
Clearance Between Open Contacts			mm	11± 1
Over travel of Contacts			mm	4± 1
Three-phase Opening/Closing Synchronization			ms	≤ 2
Closing Bouncing Time			ms	≤ 2
Average Opening Speed (excluding Oil Bumper)			m/s	1.2± 0.3
Average Closing Speed			m/s	0.6± 0.2
Opening Time		Highest Operating Voltage	s	≤ 0.06
		Lowest Operating Voltage	s	≤ 0.08
Closing Time			s	≤ 0.2
Main Loop Resistance of Each Phase			μ Ω	≤ 40						≤ 20
Total Thickness of Permissible Wear of Moving and Static Contacts			mm	3
Oil Bumper Buffer Trip			mm	10