ZFN22-12 series indoor AC high voltage load switchDetailed product description：

Overview
The ZFN22-12 series indoor high-voltage vacuum load switch is a self-developed product based on the FN5 type switch. It is mainly suitable for use in power grids with a rated voltage of 12KV and three-phase AC 50Hz, as a means of breaking load current and switch short-circuit current. The product retains the compact structure and easy installation and use of FN5 switch, and is equipped with a novel dedicated motor to form manual energy storage, closing, manual opening, and electric energy storage. The closing and opening functions of the switch are the preferred products for the new ring network design, and also provide the best solution for directly replacing vacuum load switches with original FN5 switch ring network cabinets.  
Environmental conditions for use
1. Environmental temperature: upper limit+40oC, lower limit -25oC
2. Relative humidity: daily average value not exceeding 95%; Monthly average value ≥ 95%
3. The altitude shall not exceed 100mm;
4. There is no risk of fire, explosion, serious pollution, chemical byproducts, or places with severe vibrations.

ZFN22-12 series indoor AC high voltage load switch model meaning


Technical parameters of ZFN22-12 series indoor AC high voltage load switch

serial number	name	unit	parameter
one	rated voltage	KV	twelve
two	rated frequency	Hz	fifty
three	rated current	A	six hundred and thirty
four	Rated closed-loop breaking current	A	six hundred and thirty
five	Rated Active load breaking current	A	six hundred and thirty
six	5% rated active load breaking current	A	thirty-one point five
seven	Rated cable charging breaking current	A	ten
eight	Rated no-load transformer breaking current		1250KVA transformer no-load current
nine	Rated short-circuit closing current	KA	fifty
ten	Rated short-circuit peak withstand current	KA	fifty
eleven	4S rated thermal stability current	KA	twenty
twelve	Rated transfer current	A	three thousand one hundred and fifty
thirteen	1-minute power frequency withstand voltage	KA	forty-two
fourteen	Lightning impulse withstand voltage (peak value)	KA	seventy-five
fifteen	Mechanical lifespan	time	one thousand

Technical specifications

serial number	name	unit	parameter
one	contact gap	mm	8+1
two	Contact overtravel	mm	3±1
three	Three phase asynchronous opening and closing	ms	≤2
four	Bouncing time of closing contact	ms	≤2
five	Closing speed	m/s	0.6±0.2
six	Opening speed	m/s	1±0.2
seven	Main circuit resistance	μΩ	<150
eight	Opening time	s	>0.06
nine	Interphase center distance	mm	210±0.2

Outline drawing

1. Terminal introduction 2. Fixed screw hole 3. Isolation switch 4. Vacuum tube 5. Switch spindle 6. Impactor 7. Grounding knife shaft 8. Safety 9. Cabinet frame 10. Terminal extraction