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

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.


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 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

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

1  Vacuum Circuit Breaker Series
2  Outdoor Load Break Switch Series
3  Intelligent Automation Equipment For Power Grid
4  Outdoor AC High Voltage Disconnect Switdh Series
5  Indoor Load Break Switch Series
6  Indoor AC High Voltage Disconnect Switch Series
7  Insulator Series
8  Drop-out Type Fuse Series
9  Arresters
10  hot stick/insulated rod/operating rod
11  Ground set/earth rod equipment
12  ground wire,grounding clamp
13  copper rod /brass rod
14  electroscope/ detector
15  lineman safety belt
16  pole climber
17  safety shoes boots ,hand gloves,carpet, mask
18  safety helmet
19  cable wire grip
20  fiber ledder , meter seal
21  hydraulic and electric crimping tool
22  Guy guard
23  snatch block
24  discharge rod lighten rod
25  cable cutter
26  puller and hand winch
27  crimping pliers and press pliers
28  Ungrouped
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Tel: 0086-577-62890982  Fax: 0086-577-62890992  E-mail:hongxiu4@gmail.com  Add: Fangdouyan zone, Liushi, Yueqing City, Zhejiang, China. 325600