JYN2-12 Removable series handcartDetailed product description：

Overview

The JYN2-12 movable AC metal enclosed switchgear series handcart is an indoor device for three-phase AC 50Hz. In addition to being used as a distribution circuit breaker in the power distribution system, it is also suitable for controlling and protecting places with frequent operations such as electric furnace transformers, high-voltage motors, and capacitor banks.

Environmental conditions for use
Environmental temperature: upper limit+40 ℃; Lower limit -10 ℃, -25 ℃ in high-altitude regions;  
Altitude: 1000m
Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90% (+25 ℃);  
Seismic intensity: not exceeding 8 degrees;  
Places without flammable, explosive hazards, chemical corrosion, and severe vibrations.

Technical parameters of JYN2-12 detachable series handcart
The assembly adjustment technical parameters of this product are shown in the following table:

serial number	name		unit	numerical value
				20kA	31.5kA、40kA
one	contact gap		mm	11±1
two	Contact line spacing (overtravel)			4±1
three	Allowable cumulative thickness of wear for dynamic and static contacts			three
four	Average closing speed	low voltage	m/s	0.55±0.15	0.60±0.2
		rated voltage
		high voltage
five	Average closing speed	low voltage		1.0±0.3	1.1±0.2
		rated voltage
		high voltage
six	Closing time	low voltage	ms	≤200
		rated voltage
		high voltage
seven	Inherent opening time	low voltage		≤80
		rated voltage
		high voltage
eight	High voltage contact closing bounce time			≤2
nine	Three phase asynchronous disconnection			≤2
ten	Resistance of each phase conductive circuit		Ω	≤50	≤40

structural characteristics
The overall structure of the product is a handcart assembly type, with each arc extinguishing chamber fixed to the upper and lower outlet sockets by two insulators. The conductive rod is driven by a crank arm, and the soft connection is used to conduct the opening and closing current. The product structure is stable, with low impact force when closing. The operating mechanism is a CD17 electromagnetic mechanism and a CT19 spring mechanism with matching power. The product structure is simple, the action is reliable, and the performance is stable.

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

1. Distance adjustment gasket 2, contact pressure spring 3, insulator 4, arc extinguishing chamber bolt 5, lower bracket 6, vacuum arc extinguishing chamber 7. Upper bracket 8, conductive clip bolt 9, soft connection 10, crank arm 11, overtravel adjustment head 12, insulation rod