ZN85-40.5KV Indoor Vacuum Circuit Breaker (VCB)
ZN85-40.5/T □ -□( 3AV3)-series handcart type indoor vacuum circuit breaker for three-phase AC 50Hz/60Hz,40.5KV power system, it's comply with standard of IEC62271-100, it's for industrial and mining enterprises, power plants and substations as the division and load current, overload current fault current purposes, and occasions for frequent operation.
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  • PRODUCT DETAILS
  • Installation

The use of environmental conditions

  • Altitude: ≤2000m;
    Air temperature: -55℃ ~ +45℃;
    Relative humidity: daily average is not more than 95%, saturated vapor pressure daily average is not more than 1.8kPa.
    Earthquake intensity: not more than eight. Installation places: No fire, explosion hazard, serious filthy places.
    In the second system, the amplitude of induced electromagnetic interference does not exceed 1.6kv
    Power condition: DC 110V, 220V; AC 110V, 220V
    If the client have other special request, please rise up when ordering.

Product model and meaning:

  • ZN85-40.5/T
    Vacuum circuit breaker
    Rated short-circuit breaking current(KA)
    Indoor type
    Rated current (A)
    Series number
    Actuator type
    Rated voltage

General structure drawing and installation size:

Mainly technical parameters

No

Item

unit

parameter

1

Rated voltage

KV

40.5

2

1min power frequency withstand
voltage(RMS)

KV

95

3

Lighting impulse withstand
voltage(peak)

KV

185

4

Rated frequency

Hz

50/60

5

Rated current

A

1250, 1600, 2000,2500,3150

6

Rated short time withstand
current

kA

25, 31.5,40

7

Rated peak withstand current

kA

63, 80,100

8

Rated breaking duration

s

4

9

Rated short-circuit breaking
current

kA

25, 31.5,40

10

Rated short circuit making
current(peak)

kA

63, 80,100

11

Rated breaking order


0-0.3s-CO-180s-CO

12

Breaking time

ms

≤80

13

Rated short-circuit cirrent
breaking times

times

20

14

Rated single capacitor device
ON-OFF current

A

630

15

Rated single back-to-back
capacitor device current

A

400

16

Rated operating voltage

V

AC110/220, DC110/220

17

Mechanical life

times

10000

18

Contactor opening distance

mm

22±2

19

Contactor contact trip

mm

7.5±1.5

20

Average speed for closing

m/s

0.65±0.15

21

Average speed for opening

m/s

1.8±0.2

22

Closing time

ms

45 - 100

23

Opening time

ms

40-100

24

Contact closing bounce time

ms

≤3

25

At the different period of three
consistency

ms

≤2

26

Buffered travel

mm

13±1

27

Leading electrical circuit
resistance(excluding contactor arm)

μΩ

≤40

28

the thickness of the contact wear

mm

3

Installation and test run:

  • 5.1Checking before installation

    Check the specification of the breaker complies with the contract, and if the documents and the accessories provided with breaker are complete, if there is any injury on the surface of the breaker and if the isolated drum is damaged, also check the vacuity of the vacuum are-chute with industrial frequency voltage withstand method, switch tripping and apply industrial frequency voltage 95kv for 1 min at the fracture and there should be no flash-over or breaking.

  • 5.2Test

    Check the circuit breaker box in good condition generally does not require re-commissioning, only when that circuit breakers do not meet the technical requirements or replacement of critical components, the need to debug the circuit breaker to conform to the technical requirements.
    First, adjust the vacuum interrupter moving conductive rod and rod ends under the oil buffer height, so that the vacuum interrupter contact opening distance of 20±2 mm, insulated rod with adjustable length, so that the contact travel of 7.5±1.5 mm; then check the connecting shaft and oil buffers are normal, finally, regulatory agencies to make normal operation, requiring either manual, electric control, energy storage, switching, and other sub-actions should not be a gate wiring.

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