Products - CHINA·LONGXI ELECTRIC CO.,LTD.

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Products

FZW28-12(VSP5) Type Outdoor HV AC SF Insulation 6 Vacuum Load Break Switch

Summary

FZW28-12(VSP5) type outdoor HV AC SF6 insulation vacuum load break switch is used to open and close load current and short-circuit current in the power distribution system with rated voltage 12kV, three-phase AC 50/60Hz. It is applicable to substations, industrial and mining enterprises, urban and rural electric power networks, especially to the occasions with frequent operation and urban and rural automatic power distribution networks for power network control and equipment protection. The switch has the functions of manual operation and electric operation. The product conforms to the standards of IEC 60265-1, IEC62271-103 & GB/T3804: High voltage AC load break switch.

Ambient conditions

1. Altitude: ≤3000m;
2. Ambient temperature: -30℃～+45℃；diurnal temperature rang ≤25℃;
3. Wind speed: ≤35m/s;
4. Earthquake intensity: ≤grade 8;
5. Relative humidity: monthly average ≤90%; daily average ≤95%;
6. Ice thickness: ≤10mm
7. Pollution degree: ≤Ⅳ(GB5582);
8. Applicable occasions: no fire and explosion danger, no chemical corrosion and no frequent severe vibration.

Model

Technical specification

No.	Item		Data
No.	Operating method		Manual or electric(persistent excitating magnet)
1	Rated value	Rated voltage	12KV
		Rated current	630A
		Rated short-time withstand current(4s)	12.5 16 20
		Rated short-circuit closing current(peak)	31.5 40 50
		Rated frequency	50/60Hz
2	1min P.F withstand current	Operating voltage	AC220V(80%~110%)
		Phase to earth	42KV
		Phase to phase	42KV
		Across open contacts	48KV
		Secondary phase to earth	2KV
3	Lightning impulse withstand current(peak)	Phase to earth	75KV
		Phase to phase	75KV
		Across open contacts	85KV
4	Rated gauge pressure of SF6 gas		Concentration up to 93% at 0 gauge pressure
5	Manual rated operating strength		100~400N
6	Main loop resistance		≤700μΩ/≤150μΩ
7	Close-operating	184~220V	closing time 120-180ms(220V) ≤400ms(184V) attract current ≤17A bouncing time≤10ms maintaining current≤
7	Close-operating	Lowest closing voltage	120~160V
8	Open-operating	184~220V	opening time≤1.5s asynchronous time≤3ms
8	Open-operating	Lowest maintaining attact voltage	45~85V
9	Close/open-operating time difference between isolation clearance and vacuum arc-extinguishing chamber		≥10ms
10	Power consumption		≤99W
11	Short-circuit non-breaking test		≥1400A
12	Air-sealed test(leakage detecting)		No leakage at 0.2Mpa
13	Contact gap of vacuum arc-extingushing chamber		7~9mm
14	Contact over-travel of vacuum arc-extingushing chamber		3~4mm
15	Across isolating distance		25~35mm
16	Isolating clearance over-travel		6~13mm
17	Net weight		185Kg

Main function features

1. SF6 gas insulation: SF6 gas is the non-toxic, non-combustible and electrical insulation gas, it has excellent arc-extinguishing performance;
2. Besides the standard porcelain bushing, a variety of options are available including silicon rubber insulator on the epoxy equipment bushing;
3. Visible Open/Close: The main contact position indicator marked by colors (Green-Open; Red-Close) can be easily visible from the ground. The indicator is connected directly to the main contact drive shaft assembly to ensure displaying the contact state accurately;
4. Reliable sealing performance with IP67 Protection Level: The mature sealing technoloty assures reliable sealing performance. The shell is processed by die drawing once-shaping technology, so it’s easy for the case sealing with high air tightness and high mechanical strength.
5. Free maintainance: The main loop of circuit breaker, the secondary component and the operation mechanisn are all sealed in SF6 gas(zero gauge pressure), so they are not affected by the external environment, and have stable & reliable performance as well as the advantage of free maintianance.
6. Good performance of incoming and outgoing line: The switch can adopt cable incoming & outgoing method, or can use liquid silicon rubber corner bushing to make the distance between phases up to 280mm and ensure good performance of external insulation.
7. Safe usage: Anti-explosive device mounted on the top of box can prevent heated gas or matters from spattering out once the switch fault occurs.

Outline and installation dimension