Summary
ZWHA-24 series outdoor HV AC vacuum circuit breaker is used to make and break load current, overload current and short-circuit
current in the power system with rated voltage 24kV, three-phase AC 50/60Hz. It is applicable to substations, industrial and mining
enterprises, unban and rural electric power networks, especially to the occasions with frequent operation and automatic power
distribution networks for power network control and equipment protection. 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: ≤2000m;
2. Ambient temperature: -40℃~+45℃;diurnal temperature rang ≤25℃;
3. Wind speed: ≤35m/s, equivalent to wind pressure of 700Pa;
4. Earthquake intensity: ≤grade 8;
5. Relative humidity: monthly average ≤90%; daily average ≤95%;
6. Ice thickness: ≤10mm
7. Sunlight intensity: ≤1000W/m2
8. Pollution degree: ≤Ⅳ(GB5582);
9. Applicable occasions: no fire and explosion danger, no chemical corrosion and no frequent severe vibration.
Model
Technical specification
No.
|
Item
|
Unit
|
Data
|
1
|
Rated voltage
|
kV
|
24
|
2
|
Rated insulation
level
|
1min P.F
withstand
voltage
|
Dry test
|
65/79(isolating distance)
|
Wet test
|
50/64(isolating distance)
|
Auxiliary loop and control loop
|
2
|
Lightning impulse withstand voltage(peak)
|
125/145(isolating distance)
|
3
|
Rated frequency
|
Hz
|
50/60
|
4
|
Rated current
|
A
|
630、1250
|
5
|
Rated operating sequence
|
|
O-0.3s-CO-180s-CO
|
6
|
Rated short-circuit breaking current
|
kA
|
16
|
20
|
25
|
7
|
Rated short-circuit making current(peak)
|
40
|
50
|
63
|
8
|
Rated peak withstand current(peak)
|
40
|
50
|
63
|
9
|
Rated short-time withstand current
|
16
|
20
|
25
|
10
|
Rated short-circuit duration
|
s
|
4
|
11
|
Breaking times of rated current
|
times
|
1000
|
12
|
Breaking times of rated short-circuit breaking current
|
20
|
13
|
Closing time
|
ms
|
20~80
|
14
|
Opening time
|
At max. operating voltage
|
20~80
|
At rated operating voltage
|
20~80
|
At min. operating voltage
|
20~80
|
15
|
Complete breaking time
|
≤100
|
16
|
Mechanical life
|
times
|
10000
|
17
|
Closing power
|
J
|
70
|
18
|
Rated input power for energy storage motor
|
W
|
≤70
|
19
|
Rated operating voltage and rated auxiliary loop current
|
V
|
DC/AC 220
|
20
|
Energy storage time under rated voltage
|
S
|
≤8
|
21
|
Over-current
tripping device
|
Rated current
|
A
|
5
|
Tripping current accuracy
|
%
|
±10
|
22
|
Average opening speed
|
m/s
|
1.5±0.2
|
23
|
Average closing speed
|
0.8±0.2
|
24
|
Contact close-boucing time
|
ms
|
≤3
|
25
|
Three-phase opening non-simultaneity
|
≤2
|
26
|
DC resistance for each phase loop(with isolator)
|
μΩ
|
≤80(150 with isolator)
|
27
|
Allowed accumulative wear thickness for moving and static contacts
|
mm
|
3
|
28
|
Phase-to-phase spacing
|
390±1.5
|
29
|
Contact self-closing pressure
|
N
|
2000±200
|
30
|
Net weight
|
kg
|
125(155 with isolator)
|
|
Main function features
1. The product can be equipped with a protection and metering current transformer to realize 3-sectional type over-current protection and
electricity consumption monitoring according to users’ request;
2. The product can be equipped with a built-in remote control device to realize remote operation;
3. Equipped with a reclosing controller, it can realize the function of automatic reclosing.
4. Iron or stainless steel body, manual or electric mechanism is available for free chioce;
5. The product can meet the demands of the users from different regions as it has the norms of miniaturization and plateau types for users
to choose.
6. The switch can be equipped with an external isolator according to the users’ request.
7. The operating mechanism can be permanent magnet type which can sensitively and quickly cut off the short-circuit current;
8. All the other functions which the similar products have can be added to the switch according to the users’request.
Outline and installation dimension