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.

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.



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 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

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”.