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40.5kV Outdoor Vacuum Circuit Breaker

Short Description:

ZW □ -40.5 series outdoor high voltage AC vacuum circuit breaker is an outdoor switch equipment with rated voltage of 40.5kV and frequency of 50Hz. It is mainly used in three-phase AC power systems, 33~40.5kV voltage level substations and outdoor lines, to open and close. Load current, overload current, short-circuit current, capacitive current, inductive current in transmission and distribution lines, as the core equipment for power control and protection of power transmission and distribution substations and lines; This equipment has the advantages of high breaking capacity, excellent insulation performance, high frequency operation reliability, long service life, and low maintenance.


Product Detail

Product Tags

Product Overview And Usage

ZW7A-40.5: CT is built-in or externally, and the external insulation is the physical appearance of silicone rubber or porcelain.

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Product Model And Meaning

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Working Conditions

Normal use conditions
a. Ambient air temperature, minimum -30°, maximum +40°; the average temperature measured within 24 hours does not exceed 35°;
b. The altitude does not exceed 1000m;
c. The pollution level of the surrounding air shall not exceed level II;
d. The surrounding air is not obviously polluted by dust, smoke, corrosive or flammable gas, steam or salt spray;
e. The thickness of icing shall not exceed 20mm;
f. The wind speed is not more than 34m/s;
g. The seismic fissure does not exceed 8 degrees;
h. Humidity conditions:
The average value of relative humidity measured within 24h, not exceeding 95%;
The average value of the water vapor pressure measured within 24h does not exceed 2.2kPa;
The average monthly relative humidity does not exceed 90%;
The average monthly water vapor pressure does not exceed 1.8kPa;

If the above-mentioned normal use conditions are exceeded, please consult with the manufacturer in advance, and please specify when ordering;

Abnormal use conditions
Including the extreme use environment such as altitude above 1000 meters, rapid temperature change, icing above 20mm, heavy pollution, severe condensation, mildew, sand, dust, severe cold, scorching heat, vibration, impact, swing, etc., please negotiate in advance when ordering.

Main Technical Parameters Of Zw7 Series Products

No.

Description

Unit

Data

1

Rated voltage

kV

40.5

2

1min

Rated power frequency withstand voltage 1min

kV

95

3

Rated lightning impulse withstand voltage

kV

185

4

Rated frequency

Hz

50

5

Rated current

A

630, 1250, 1600, 2000, 2500

6

Rated short-time withstand current

kA

20

25

31.5

7

Rated peak withstand current

50

63

80

8

Rated short-circuit breaking current

20

25

31.5

9

Rated short-circuit making current

50

63

80

10

Rated short-circuit duration

s

4

11

DC component of rated short-circuit breaking current

51

12

Peak value of transient recovery voltage (TRV)

kV

114

13

Rated power supply voltage of closing and opening devices and auxiliary circuits

V

DC/AC 220V,DC/AC 110V

14

Rated operating sequence

O-0.3s-CO-15s-CO

15

Opening time

ms

20~50

16

Closing time

30~80

17

DC time constant of rated short-circuit breaking current

45

18

Rated cable charging breaking current

A

50

19

Service life

E2-C2-M2 (10000)

20

Rated short-circuit breaking current breaking times

Times

20

Assembly Adjustment Parameter Table Of Zw7 Series Products

No.

Description

Unit

Data

1

Contact opening distance

mm

20±2

2

Contact stroke

4±1

3

Average closing speed (measurement contact just before closing to 10mm before closing)

m/s

0.8±0.3

4

Average opening speed (measurement contact is just divided to 10mm apart)

1.6±0.3

5

Bounce time of contact closing

ms

≤5

6

Bounce time of contact closing

≤2

7

Three-pole contact opening in different periods

≤2

8

Main circuit resistance of each pole

μΩ

≤100(Without instrument transformer)

9

Note: The above parameters refer to the rated operating voltage

Installation Dimensions

At an altitude of 1000 meters (center distance of 710mm), an altitude of 2000 meters (center distance of 780), and an altitude of 3000 meters (center distance of 850), the overall dimensions of the circuit breaker are as follows:

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At an altitude of 4000 meters (center distance 920), at 5000 meters (center distance 1000) meters, the overall dimensions of the circuit breaker are as follows:

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