Products - CHINA·LONGXI ELECTRIC CO.,LTD.

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FZW28-12F(FFK) Outdoor HV AC Vacuum Load Break Switch Type sectionalizer

Summary

FZW28-12F(FFK) outdoor HV AC vacuum load break switch type sectionalizer is for pole-mounting installation, and has manual and electric operation functions. The sectionalizer adopts FZW28-12 type of free-of-maintainance load break switch as its main body which uses vacuum arc-extinguishing and SF6 gas as the insulation mediums to earth and between phases. The switch is composed of FZW28-12 vacuum LBS and controller. It has the functions of fault detection, protection & control and communication. Installed on the overhead line of voltage l0kv, it can remove automatically the single-phase grounding fault and short-circuit fault between phases. The installation position can be the duty boundary site of 10kV distribution user incoming line or the T branch line junction which conforms to requirements. The switch can not be for the use of series connection. The product conforms to the standards of IEC62271-100 & GB1984: AC high voltage circuit breaker, IEC60694 & GB/T11022: HV general technical requirement of switch and control apparatus.

Ambient conditions

1. Altitude: ≤3000m;
2. Ambient temperature: -30℃～+40℃；diurnal temperature rang ≤25℃;
3. Wind speed: ≤35m/s
4. Earthquake intensity: ≤grade 8;
5. Relative humidity: monthly average ≤90%; daily average ≤95%. Dew may be condensed in the interior of the tank body when high humidity drop rapidly;
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
9. Neutral grounding mode: neutral non grounding, neutral grounding via arc-extinguishing coil, neutral grounding via low-resistance.

Model

Technical specification

Rated technical parameters for switch

Item		Unit	Data
Rated voltage		kV	12
Rated insulation level	1min P.F withstand voltage (phase to phase, phase to earth/across open contacts)	kV	Dry test	42/48
			Wet test	34
	Lightning impulse withstand voltage (phase to phase, phase to earth/across open contacts)	kV	75/85
Rated frequency		Hz	50/60
Rated current		A	630
Rated short-time withstand current/ rated short-circuit duration		kA/4s	16	20
Rated peak withstand current(peak)		kA	40	50
Rated short-circuit making current			40	50
Mechanical life		次	10000
Net weight		kg	185

Note:1. The insulation withstand voltage should be amended accordingly if the altitude of the procuct’s using site is higher than 1000m;
2. Do not make the insulation between phases when PT is built in the switch.

Parameter table for control device

No.	Item	Rated value	Remarks
1	Input operating voltage	AC 220V	12
1	Output voltage(open-operating)	AC 220V / DC 48V	630
2	Input operating voltage frequency	50Hz	42
3	Allowed fluctuating range for input operating voltage	±20%	34
4	Overall unit’s power consumption	<10W	75
5	Sampling phase current input value	120~600A(primary value)	50
6	Low voltage action value	10~140V(secondary value)	16
7	Allowed sampling error for input power value	±5%	O-0.3s-CO-180s-CO
8	Delaying time value of over-current protecting action	0.3~1s(can not be set)	30
9	Zero-sequence current setting value	0.2~60A(primary value)	40
10	Earthing action delaying time	0~1800s	40

Main function features

1. Function of zero-sequence protection: After detecting the line zero-sequence earthing fault, the switch will take the action and open automatically within the delay time set by the controller.
2. Protection of short-circuit between phases: When short-circuit fault between phases occurs in the line, the boundary switch will open immediately once the substation open to isolate the fault area.
3. Users’load monitoring: Users’load monitoring can be realized after through controller and communication system after the switch is built in a metering CT.
4. Wireless protection: The embedded GPRS communication module which supports GPS communication can realize the function of “four remote”.

Outline and installation dimension