VN2-24E Brochure [PDF]

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VN2-24E Cooper Nature

Medium-voltage Embedded Vacuum Circuit-breaker 24kV, ...3150A, ...31.5kA

VN2-24E Medium-voltage Embedded Vacuum Circuit-breaker

Cooper Nature ( Ningbo ) Electric Co., Ltd.

Contents

Techniques and capabilities ............................................................................................................ 1 Producing and manufacture ........................................................................................................... 2 Design and characters .................................................................................................................... 3 Type specifications ......................................................................................................................... 4 Technical parameters ...................................................................................................................... 5 Relationship between the breaking No. and the breaking current ................................................ 6 Overall dimension ........................................................................................................................... 7 Secondary controlling principle diagram ........................................................................................ 9 Order table .................................................................................................................................... 11

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VN2-24E Medium-voltage Embedded Vacuum Circuit-breaker

Advanced techniques and capabilities
The circuit-breaker VN2-24E is the newest equipment in the voltage class of 24kV manufactured by CooperNature Electric (Ningbo) Co., Ltd. It is universal used in power distributing and transforming systems of power stations, power generators, and secondary substations of mines, industries and infrastructures.
The circuit-breaker VN2-24E has complete type specifications: the rated voltage is 24kV, the rated current is up to 3150A and the rated short circuit breaking current is up to 31.5kA.
The circuit-breaker VN2-24E is equipped with modularized spring operating mechanism which has characteristic of more convenient maintenance, rapider replacing of parts and more reliable performance.

Front View of VN2-24E


The circuit-breaker VN2-24E adopts embedded poles that the low resistance vacuum interrupter and the primary main electrical circuit are cast in insulating cylinders by epoxy resin. This structure make the breaker have more reliable insulation.
The embedded poles of circuit-breaker VN2-24E have the technique of ventilation and convection. Besides the vacuum interrupter is with low resistance. All of that reduce the power consumption and the temperature rising due to the longtime running of circuit-breaker.

Back View of VN2-24E


The circuit-breaker VN2-24E can be used in 12kV power grid and plateau regions with altitude up to 4500m. Its power frequency withstand voltage is up to 65kV and the lightning impulse withstand voltage is up to 125kV.
The driving mechanisms of circuit-breaker VN2-24E are designed by professionals in CooperNature and with characteristic of reliable closing performance, low impact force and longer lifetime. The mechanical lifetime can be up to 20000 cycles.

VN2-24E/T1250


All of the mechanism’s surface of circuit-breaker VN2-24E is disposed with special process and lubricative technique. Not only the rust-resistance capability is improved but also the operating performance is ensured. The circuit-breaker is also applicable to humid and hot regions.
The circuit-breaker VN2-24E has been through the whole type test in accordance with the standards of GB and IEC. The product 3150/31.5kA is the first through the type test in china. VN2-24E/T3150

1

Cooper Nature ( Ningbo ) Electric Co., Ltd.

Refined producing and manufacture Ordering manufacture line for circuit-breaker
The manufacture line for circuit-breaker assembly is the first in China and is innovated by CooperNature and on basis of the experience of current manufacturings. This line is designed according to the structure, producing process and character of circuit-breaker and each producing procedure is controlled and monitored through computers. So the circuit-breaker has top class performance. Assembly Line for Circuit-breaker

Jigs and fixtures designed by self
According to the need for producing process, there are lots of jigs and fixtures specially used to assemble circuit-breakers and designed by workers or professionals on the basis of their experience. They do not only ensure the precision of circuitbreaker assembly but also improve the assembling efficiency and stability. Assembly for the Underpan of Circuit-breaker

500 cycles mechanical test before out of factory
There are about ten testing cubicles for mechanical test. For each circuit-breaker prepared to be out of factory, 500 cycles mechanical test must be done and the running status of circuit-breaker can be observed and noted by the testing cubicles. If there are some faults the operators will solve them. So the fault probability in prophase is be reduced and user can be at ease to use them. Testing Cubicles for Circuit-breaker

Complete performance testing facilities
There are some imported performance testing facilities for each circuit-breaker, both capabilities and parameters. Before circuitbreaker is delivered to customer, it must be checked and tested through the standard testing panel, which avoid the problem during circuit-breaker being equipped with switchgear and also ensure the product’s generalization and interchange. Parameter Testing for Circuit-breaker

2

VN2-24E Medium-voltage Embedded Vacuum Circuit-breaker

Innovative product design Damper with perfect performance
Thanks to the refined damper with perfect performance and the new cam gear with curvilinear design, the contacts rebounding value during the breaker opening is reduced more and the breaker can be opened reliably. Besides, the bellows in vacuum interrupter are avoided to be broken down due to contacts over bounding and also the mechanical lifetime of operating mechanism is ensured.

Special design of repair without many tools
During the design for VN2 circuit-breaker, the installation and repair must be taken into account. So for the disassembly of parts or accessories, users need no special tools and the repair becomes more convenient. Besides, all of the secondary controlling components are in front of the operating mechanism, which also make maintenance and repair convenient.

Damper with Perfect Performance

Modularized operating mechanism
Modularized operating mechanism is another feature of VN2. It can be divided into closing module, opening module, main-axis module and secondary wiring module, which make the mechanism have characteristic of standard manufacture method, short producing period, convenient maintenance and rapid replacing. These modules are standard and applicable to all VN2 so the costs of facilities management and maintenance are reduced.

Closing Module

Opening Module

Self- lubricative bearing without oil
Self-lubricative bearing without oil used for VN2 circuit-breaker is very applicable to over-load and low-speed conditions and avoids the lost-lubricative phenomena due to oil-lubricative bearing out of work for a long time. The free-maintenance can be realized accordingly. Self- lubricative Bearing without Oil

Conductors with silvered surface
All the conductors of VN2 circuit-breaker are disposed by silvered process so that it do not only reduce the contacting resistance but also improve the electricity-conducting capacity of conductors. Thanks to the reduced resistance the heat from circuit-breaker running can be decreased and the breaker’s lifetime is also lengthened. Conductors with Silvered Surface 3

Cooper Nature ( Ningbo ) Electric Co., Ltd.

Unique embedded poles
Through advanced APG process the vacuum interrupter with small volume and low resistance and the main electrical circuit are cast in an insulating cylinder by epoxy resin. This structure makes the primary electrical circuit be isolated with the external environment. Comparing with assembled poles, the accessories, conductor joints and fasteners of embedded poles are reduced mostly. All of that do not only make the assembly simple, avoid the fasteners loose due to vibration during transportation and improve the product’s reliability, but also prevent the external surface of vacuum interrupter from external mechanical impact and environment such as dusts, humidity, corrosive or animals. Thanks to the epoxy resin, the poles center distance is reduced and accordingly the overall dimension of equipped switchgear is reduced.

Embedded Pole

Vacuum interrupter with small volume and low resistance Fixed cover plate Fixed conductive shaft Fixed contact Moving contact Shield cylinder Porcelain cover Bellow shield Moving cover plate Bellow Oriented sleeve


The circuit-breaker VN2 adopts vacuum interrupter with small volume, low resistance and high vacuum degree. When its Rshaped contacts is breaking short-circuit current there occurs lengthways magnetic field that has characteristic of high breaking capability, small breaking current, low reburning probability and rapid insulated recovering. So the vacuum interrupter has long lifetime. Besides, thanks to the one-off sealing and exhausting process, the vacuum interrupter has advanced electric capability and mechanical capability. At the same time its vacuum degree and other technical parameters all precede national and international standards.

Internal Structure of Vacuum Interrupter

Type specifications VN2

24E

630

20

210

V: Vacuum circuit-breaker N: CooperNature

Rated voltage: 24kV E: Embedded pole

Rated current 630A 1250A 1600A 2000A 2500A 3150A

Rated short-circuit breaking current 20kA 25kA 31.5kA

Poles center distance 210mm 275mm

D Type D: Withdrawable F: Fixed

4

VN2-24E Medium-voltage Embedded Vacuum Circuit-breaker

Technical parameters Rated Voltage Rated Voltage

Ur[kV]

24

Ud(1min)[kV]

Between phase

65

Isolated

79

Lightning impulse withstand voltage(peak value)

Up[kV]

or phase to the earth

125

joints

145

1min power frequency voltage of the secondary controlling circuit

[V]

2000

Power supply of controlling circuit

[V]

AC220, DC220/110


Fr[Hz]

50/60

1min power frequency withstand voltage(effective value)

Rated frequency Rated operating sequence

O-0.3s-CO-180s-CO

Rated Current Ir[A]

630, 1250, 1600, 2000, 2500, 3150


Rated short-circuit breaking current

Ics[kA]

20, 25, 31.5

Rated short-circuit making current

Iu[kA]

50, 63, 80

Rated short-time withstand current

Ik[kA]

20, 25, 31.5

Rated peaking withstand current

Ip[kA]

50, 63, 80

[A]

400

[kA](4250Hz)

20

Cycle

20000

Rated current

Rated capacitor bank breaking current Rated capacitor bank making current

Mechanical character Mechanical lifetime Electrical lifetime





5

E2

Opening time

[ms]

20~50

Arcing time

[ms]

≤15

Full breaking time

[ms]

30~65

Closing time

[ms]

35~70

Special voltage degree is available on request; Must be with forced cooling.

Cooper Nature ( Ningbo ) Electric Co., Ltd.

Breaking Current Ics (kA)

The relationship between the breaking No. and breaking current of vacuum interrupter

Breaking Current Ics (kA)

Breaking No. Breaking No.

6

VN2-24E Medium-voltage Embedded Vacuum Circuit-breaker

Overall dimension Overall dimension for fixed circuit-breaker (Fig1 & Fig2)

Unit: mm Parameters Rated current

630A, 1250A

Rated short-circuit breaking current 20kA, 25kA

P

W1

W

210

520

588

275

720

784

Fig 1 Overall Dimension for Fixed Circuit-breaker with 630A~1250A & 20kA~25kA

Fig 2 Overall Dimension for Fixed Circuit-breaker with 1600A~3150A & 20kA~31.5kA 1) Radiator is equipped in the circuit-breaker with rated current 2500A;

7

Cooper Nature ( Ningbo ) Electric Co., Ltd.

Overall dimension for withdrawable circuit-breaker(Fig3 & Fig4)

Unit: mm Parameters Rated current

630A, 1250A

Rated short-circuit breaking current 20kA, 25kA

P

P1

W

W1

W2

A

B

C

210

276

685

636

652

650

640

590

275

376

885

842

852

850

836

786

Fig 3 Overall Dimension for Withdrawable Circuit-breaker with 630A~1250A & 20kA~25kA

Fig 4 Overall Dimension for Withdrawable Circuit-breaker with 1600A~3150A & 20kA~31.5kA 1) Radiator is equipped in the circuit-breaker with rated current 2500A; 2) The poles of circuit-breaker with rated current 1600A~2000A are covered with thermal sleeves; 3) There must be forced cooling in the circuit-breaker with rated current 3150A.

8

9

Technical Requirement

Closing release

Over Current Release

Connecting Wire

L1~L11

Function

Limit Switch Locking Magnet Resistance

Shift function

Divided resistance Over current protection

Locking function Control locking loop

Control closing of circuit breaker Opening release Control opening of circuit breaker Energy Storage Motor Storage energy for closing of circuit breaker Auxiliary Switch Shift CO operation Rectifier cell Rectify circuit Aviation Plug Header of control wires Wiring Terminal Connect to truck wires Anti-pumping Relay Prevent circuit breaker from release Micro Switch Shift after closing spring energy is stored

Name

Sign

HQ TQ M HK V1~V4 XT LXØ KO SP1~SP3 SP5 Y1 R0~R1 Y7~Y9

1. The state of circuit breaker: no energy storage, opened position of the circuit breaker, test position of the truck. 2. Use 1 mm2 wire for control loop while 2.5 mm2 wire for grounding use. 3. XT selects 58-pin hole aviation plug. 4. Y7, Y8, Y9, Y1 and K0 are optional. 5. When DC power supplied, cancel rectifier cell (V1-V4), the function in broken line should be same. 6. Optional function configuration. (Note:KO, V1~V4, L1~L11, A1~A14, B1~B15, R0-R1 are the cell in the)

AC/DC

AC/DC 220V

110V

L3 L4 L5 L6 fg

L7 cb







ij

L8

L9

L10 L11







kL Lm pq


af




dc




fe




L2 gh

L1 ba

Withou anti- with locking
pumping without
function locking

Numbe r of WirinWire g Confi gurati on With anti- with locking pumping without function locking

kçíÉ
páÖå==
ãÉ~åë=ïáêáåÖ=ïÜáäÉ=Ää~åâ=ëé~ÅÉ=ãÉ~åë=çéÉåáåÖK

VN2-24E Medium-voltage Embedded Vacuum Circuit-breaker

Secondary controlling principle diagram

Secondary controlling principle diagram for fixed circuit-breaker

Technical Requirement

Closing Release

Over-current Release

Connecting Wire

L1~L11

Function

Transfer function

Over-current protection

Limit Switch Locking function Auxiliary Switch in the chassis Shift at test position Auxiliary Switch in the chassis Shift at working position Locking Magnet Contorl locking loop Resistance Divided resistance

Control closing of circuit breaker Opening Release Control opening of circuit breaker Energy Storage Motor Motor Storage energy for closing of circuit breaker Auxiliary Switch Shift CO operation Rectifier Cell Rectify circuit Aviation Plug Header of control wires Wiring Terminal Connect to truck wires Anti-pumping Relay Prevent circuit breaker release Micro Switch Shift after closing spring energy is stored

Name

Sign

HQ TQ M HK V1~V4 XT LXØ KO SP1~SP3 SP5 S8 S9 Y1 RO~R1 Y7~Y9

1. The state of circuit breaker: no energy storage, opened position of the circuit breaker, test position of the truck. 2. Use 1 mm2 wire for control loop while 2.5 mm2 wire for grounding use. 3. XT selects 58-pin hole aviation plug. 4. Y7, Y8, Y9, Y1 and K0 are optional. 5. When DC power supplied, cancel rectifier cell (V1-V4), the function in broken line should be same. 6. Optional function configuration. (Note:KO, V1~V4, L1~L11, A1~A14, B1~B15, R0-R1 are the cell in the)

AC/DC 220V

110V




AC/DC











L5 af

Without anti- with locking
pumping without function locking







L4 dc




L3 fe

L2 gh

Numbe r of L1 WirinWire g Confi gurati ba on with locking
With antipumping without function locking







fg

L6







cb

L7







ij

L8

kçíÉ
páÖå==
ãÉ~åë=ïáêáåÖ=ïÜáäÉ=Ää~åâ=ëé~ÅÉ=ãÉ~åë=çéÉåáåÖK L9

L10 L11













kL Lm pq

Cooper Nature ( Ningbo ) Electric Co., Ltd.

Secondary controlling principle diagram for withdrawable circuit-breaker

10

VN2-24E Medium-voltage Embedded Vacuum Circuit-breaker

Order table Customers: Ordering Quantity:

Main parameter: Circuit-breaker type specification: Circuit-breaker type:


Withdrawable

Rated current: ==
630A


1250A

Rated short-circuit breaking current: Poled center distance:


Fixed
1600A


2000A


2500A


20kA


25kA


31.5kA


210mm


3150A


275mm

Technical parameters for standard accessories: Charging motor (M):


DC

V


AC

V

Closing coil (HQ):


DC

V


AC

V

Opening coil (TQ):


DC

V


AC

V

Technical parameters for optional accessories:
Over-current release:


2.5A


Locking electrical magnet (Y1):
DC


3.5A V


5A ===
AC

V

Note: 1) The price of circuit-breaker has included standard accessories but not included optional accessories; 2) For withdrawable circuit-breaker, the handle used for moving truck and the charging handle are standard accessories; 3) circuit-breaker with rated current 3150A must be forced cooling; 4) Please consult manufacturer if have any other special requirements.

11

Cooper Nature ( Ningbo ) Electric Co., Ltd.

Marketing Department

Switchgear Sales Department

Tel: +86-574-63486522 Fax: +86-574-63486919

Tel: +86-574-63486388 Fax: +86-574-63486388

International Business Department

Circuit Breaker Sales Department

Tel: +86-574-63486511 Fax: +86-574-63486511 E-mail: [email protected]

Tel: +86-574-63486222 Fax: +86-574-63486222

Cooper Electric (Shanghai) Co., Ltd

Central District Office

Address: No.955 Shengli Road, Zhangjiang high technique east zone, Pudong zone, Shanghai Post code: 201201 Tel: 86-21-28993600 Fax: 86-21-28994254 Website: www.cooperchina.com

Address: Room2702, Jinse Waterfront Integrated Apartments, No. 55 Waterfront East Road, Nanchang City, Jiangxi Province Post code: 330077 Tel: 86-791-8106068 Fax: 86-791-8106098

Northern District Office

Southern District Office

Address: Room1801, Unit1, The 1st Commercial and Residential Apartment, No.265 Zhongshan East Road, Shijiazhuang City, Hebei Province Post code: 201201 Tel: 86-311-85525171 Fax: 86-311-85525170

Address: No. F Yugao Buildings, Stone and Bridge Road, Nine Dragon Zone, Chongqing City Post code: 400039 Tel: 86-23-68889825 Fax: 86-23-68889825

Cooper Nature (Ningbo) Electric Co., Ltd. New Hangzhou Bay Zone, Cixi, Zhejiang, China, 315336 Tel: +86-574-63486522 Fax: +86-574-63486511 www.coopernature.com June, 2009

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