Box type AC high voltage enclosed metal switchgear/power distribution switchgear

Product overview

NXGN-12FZ (R) AC enclosed metal switchgear (50HZ.10kV) is suitable for use as an off load and short end and close short circuit current. the utility model is provided with a manual switch and an electric spring mechanism to operate the load switch, and the grounding switch and the isolating switch are matched with a manual operating mechanism.
 

Normal working environment

1,Ambient air temperature:-25oC+40oC;

2,Altitude: 1000M;

3,Relative humidity: daily average value: 95%    the average monthly value is less than or equal to 90%; the average water vapor pressure is less than 2.2 * 10-3MPa; the average monthly water vapor pressure is less than 1.8 * 10-3MPa 

4,the surrounding air is not corroded or is obviously polluted by combustible gas and water vapor;

5,No frequent violent vibration

Technical parameter

NO	ITEM		PARAMETER
1	Rated voltage/max.Working voltage		10/12KV
	Rated current		630A
2	Main bus bar current	Incoming cabinet	630A
		Outlet cabinent	20A
	Rated short-time withstand current		4KA
3	Rated short-circuit lasting time		50S
	Rated short-circuit peak current		50KA
4	Rated short-circuit close current		630KA
5	Rated active load cut-off current		630A
6	Circle drop-out current		20A
7	Rated cable charging current		20KA
8	Rated short-time withstand current for earthing switch		4(2)KA
9	Rated short-circuit lasting time for earthing switch		50s
10	Rated peaking current for earthing switch		50KA
11	Rated short-circuit close current for earthing switch		42KA
12	Power frequency voltage in 1 miniute		48/75KV
13	Lightning impacting voltage		85KV
14	Mechanical life		2000

Working principle

1.Incoming cabinet scheme

the main circuit of the cabinet is provided with a FZN21-12/630 type vacuum load switch, which is provided with an isolating knife, and can also be equipped with a grounding knife. the three parts are assembled on a machine frame and are interlocked with each other. So it can be achieved through the bus, isolation, grounding operation of the three stations, cabinets can also be flexibly equipped with CT, PT and other components.

2.Outlet cabinet scheme

the main circuit of the cabinet is composed of a FZN21-12/630 type vacuum load switch and a fuse with an impact device (with the function of an isolating switch) and a grounding knife, and the three station operation can also be realized. the cabinet can also be flexibly equipped with CT/PT lightning arrester and other components, so sometimes can be omitted metering cabinet.