JYN6 Type Removable Metal Enclosed Switchgear Series HandcartDetailed product description：

Main technical parameters of JYN6 movable metal enclosed switchgear series handcart

serial number	name	unit	numerical value
			ZN28-12C/630-20	ZN28-12C/1250-31.5
			ZN28-12C/1250-20
one	rated voltage	kV	twelve
two	rated current	A	630/1250	one thousand two hundred and fifty
three	Rated breaking current	kA	twenty	thirty-one point five
four	Rated breaking current breaking times	time	Not less than 30
five	Rated closing current (peak value)	kA	fifty	eighty
six	Dynamic stability current (peak value)	kA	fifty	eighty
seven	4S thermal stability current	kA	twenty	thirty-one point five
eight	One reclosing without current interval time	s	zero point three
nine	Closing time	s	Not greater than 0.2
ten	Inherent opening time	s	Not greater than 0.06 (rated voltage, maximum voltage)
			Not greater than 0.08 (minimum voltage)
eleven	mechanical life	time	ten thousand
twelve	Model of the accompanying operating mechanism		CD17、CT19
thirteen	One minute power frequency withstand voltage	kV	forty-two
fourteen	Full wave lightning impulse withstand voltage	kV	seventy-five
fifteen	Dimensions, height x width x depth	mm	1550×690×950
sixteen	Total weight	kg	two hundred and fifty

JYN6 type movable metal enclosed switchgear series handcart mechanical adjustment parameters

serial number	name	unit	numerical value
			ZN28-12C /630-20	ZN28-12C /1250-20	ZN28-12C /1250-31.5
one	contact gap	mm	11±1
two	Overtravel (spring compression length during closing process)	mm	4±1
three	Allowable wear thickness of contacts	mm	three
four	Average closing speed	m/s	0.55±0.15		0.6±0.2
five	Average opening speed (before contact with oil buffer)	m/s	1.0±0.3		1.1±0.2
six	Three phase asynchronous disconnection	ms	Not greater than 2
seven	Contact closing bounce time	ms	Not greater than 3
eight	Oil buffer stroke	mm	ten
nine	Unit of center distance between phases	mm	230±2

structural characteristics
The overall structure of this product is a handcart assembly type. Each arc extinguishing chamber is fixed by two suspension insulators and supported by two insulation rods on the ground, ensuring the stability of the product structure. The operating mechanism, shaft and transmission mechanism, opening spring, oil buffer, interlocking mechanism, etc. are all uniformly arranged on the handcart platform, making it an organic whole.
This product has a simple, compact, and reasonable structure, with sufficient strength, rigidity, and stability, and high insulation strength. When matched with switchgear, it has good interchangeability, correct and reliable guidance; Convenient, effortless, and impact free during propulsion; It has the necessary interlocking function, free tripping function, and reliable grounding.
This product adopts a new structure of vacuum arc extinguishing chamber, which has a large breaking capacity, strong arc extinguishing ability, long service life, small size, simple maintenance, no explosion hazard, no pollution, low noise, etc. It is particularly suitable for frequent operation and working conditions in harsh environments.

Appearance and installation dimensions
The structure and external dimensions of the product are shown in the following figure:

1. Interlocking propulsion mechanism 2, operating mechanism 3, release button 4, distance adjustment plate 5, bolt 6, shaft 7, contact pressure spring
8. Spring seat 9, overtravel adjustment bolt 10, connecting arm 11, guide plate 12, conductive clip fastening bolt 13, upper bracket
14. Bolt 15, vacuum arc extinguishing chamber 16, vacuum arc extinguishing chamber fixing bolt 17, lower bracket 18, insulator 19, platform