Overview
ZW20-12F/TD-0 series outdoor high-voltage vacuum circuit breakers (hereinafter referred to as circuit breakers) are outdoor distribution equipment
with rated voltage of l2kV and three-phase AC of 50Hz. It adopts vacuum arc extinguishing and As an insulating medium, SF6 gas is an improved product
of ZW20-12F post vacuum circuit breaker. The gas sealing, explosion-proof and insulation structure technology imported from Japan Toshiba VSP5 is adopted. The sealing performance of the inlet and outlet conduit has also been improved, and the overall sealing performance is excellent. The SF6 gas filled inside does not leak and is not affected by the external environment; Its spring operating mechanism is miniaturized and Reliability and stability optimization,using direct chain main drive and multi-stage tripping system, the action reliability and stability are improved several times compared with the traditional spring operating mechanism in China; Axis and sleeve of main circuit The contact between them adopts the adduction and extension bracelet structure, and the contact resistance of the main circuit is small and the temperature rise is low. Therefore, ZW20-12F outdoor post vacuum circuit breaker is a maintenance-Compared with ZW20-12F, ZW20-12F also adds overcurrent protection and mechanism spring energy storage indication, and is equipped with aviation
Compared with ZW20-12F, ZW20-12F also adds overcurrent protection and mechanism spring energy storage indication, and is equipped with aviation
socket for secondary electrical connection, which is convenient to combine with intelligent controller. fine The electrical and mechanical properties make ZW20-12F outdoor post vacuum circuit breaker widely used. It is mainly used to switch on and off the load current and short-circuit current of 10kV power system, and is suitable for transformer It is used for protection and control in distribution systems of power stations and industrial and mining enterprises,and is more suitable for places where power grids are frequently operated. This product is matched with the controller and has excellent recloser function, which can meet the automatic distribution Chemical system requirements.
Types of meaning
Normal service conditions
1. Ambient temperature: -40°C ~+40°C
2. Altitude :≤3000m (if the altitude is higher, the rated insulation level will be increased accordingly);
3. The ambient air can be polluted by dust, smoke, corrosive gases, steam or salt spray, and the pollution level is IV;
4. The wind speed shall not exceed 34m/s (equivalent to 700Pa on the cylinder surface);
5. Vibration or ground motion from outside the switchgear and control equipment can be ignored;
6. Special conditions of use.
If the application is required under normal use conditions other than those specified above, please consult with us.
Main technical parameters
Number
|
The name of the
|
unit
|
data
|
1
|
Rated voltage
|
KV
|
12
|
2
|
Rated frequency
|
HZ
|
50
|
3
|
Rated current
|
A
|
630
|
1000
|
4
|
Rated short circuit breaking current
|
KA
|
20
|
25
|
5
|
Rated peak withstand current
|
KA
|
50
|
63
|
6
|
Rated short -term withstand current
|
KA
|
20
|
25
|
7
|
Rated short circuit closing current
|
KA
|
50
|
63
|
8
|
Rated operaing sequence
|
|
points-0.3s-Combined points-180s-Combined points
|
9
|
Mechanical life
|
times
|
10000
|
10
|
Rated current cut- -off times
|
times
|
10000
|
11
|
Rated short circuit breaking times
|
times
|
30
|
12
|
1min Power frequency withstand voltage lmin
|
(wetiphase- -phase,.fo gronnd
|
KV
|
34
|
|
(dry )phase-phase.fo gronnd
|
KV
|
42/48
|
13
|
Lightning impulse withstand voltage
|
Interphase, ground/fracture
|
KV
|
75/85
|
14
|
1 min power frequency withstand votage of secondary crcuit
|
V
|
2000
|
15
|
Weight
|
KG
|
≈140
|
16
|
Contact spacing
|
mm
|
9
|
17
|
Contact stroke of contact
|
mm
|
3
|
18
|
Average opening speed
|
m/s
|
1.2±0.2
|
19
|
Average closing speed
|
m/s
|
0.6±0.2
|
20
|
Rated operating voltage
|
V
|
AC/DC220
|
21
|
The rated pressure of SF6 gas (gauge pressure)
|
Mpa
|
0
|
Overall dimensions