Ckg3-7.2kv/630A High Voltage AC Vacuum Contactor

• Customization: Available
• Electricity Type: AC
• Number of Pole: 4
• Model NO.: CKG3-7.2/630A
• Phase: 3
• Main Circuit Rating Voltage: High Voltage
• Main Circuit Rating Current: 630A
• Type: Ac Contactors
• Transport Package: Paper Box Packaging
• Specification: standard sizes
• Trademark: OEM
• Origin: Wenzhou
• HS Code: 8535210000
• Production Capacity: 1000PCS/Week

Product Description

Descriptions: CKG3-7.2KV/630A High Voltage AC Vacuum Contactor			Unit	Value
Main circuit	Rated working voltage (Ue)		kV	7.2	12
	Rated working current (Ie)		A	160, 250,400,630
	Rated frequency (fr)		Hz	50~60
	Rated making capacity		A	10Ie (AC-4)
	Rated breaking capacity		A	8Ie (AC-4)
	Rated short time withstand current		A	10Ie
	Rated peak withstand current		A	25Ie
	Rated short circuit duration		s	4
	Power frequency withstand voltage	Between phases,phase to earth	kV	32	42
		Vacuum breaks	kV	32	42
	Lightening impulse withstand voltage		kV	60	75
Control circuit	Rated voltage1 (Us)		V	AC or DC. 110/220
	Rated power (Ps)	Electric holding	VA	≤1000/100 (absorbing/holding)
		Mechanical holding	VA	≤900/600 (closing/opening)
Auxiliary circuit	Form			3a+3b
	Rated value			AC380V/5A, DC380V/1A
Control circuit, auxiliary circuit to earth power frequency withstand voltage			kV	2
Rated operating frequency	Long-term or mechanical holding type		time/h	300
	Short-term		time/h	600
Mechanical endurance2			10000 times	100
Electrical endurance			10000 times	25(AC-3),10(AC-4)
Mechanical characteristics	Closing time		ms	≤200
	Original opening time		ms	≤160(electric holding);                                       ≤60(mechanical holding)
	3-phase synchronism		ms	≤3
	Closing tripping		ms	≤10
Remark: 1.rated control voltage can be made according to customer's requirements.
2.for mechanical holding type, the interlock mechanism should be changed every 300,000 times.

 

Vacuum contactors utilize vacuum bottle encapsulated contacts to suppress the arc.
This arc suppression allows the contacts to be much smaller and use less space than air break contacts at higher currents.
As the contacts are encapsulated, vacuum contactors are used fairly extensively in dirty applications, such as mining.

Vacuum contactors are only applicable for use in AC systems.
The AC arc generated upon opening of the contacts will self-extinguish at the zero-crossing of the current waveform, with the vacuum preventing
a re-strike of the arc across the open contacts. Vacuum contactors are therefore very efficient at disrupting the energy of an electric arc and are used
when relatively fast switching is required, as the maximum break time is determined by the periodicity of the AC waveform.