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
|
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