VACUUM CIRCUIT BREAKER

INDOOR

VMD2 01 VMD2 02

General Provisions

Technical standard

VMD2 series indoor circuit breaker is our independent developed 12KV vacuum circuit breaker.The leading electric circuit use solid insulation method,this unique embedded technology casting vacuum interrupter of ultra-low resistance and conductive parts into exposide resin for realize the solid insulation of conductance circuit.

Testing

VMD2 series circuit breaker has passed following test:T y p e t e s t s : p o w e r f r e q u e n c y w i t h s t a n d v o l t a g e tests,lightning impulse withstand voltage tests,temperature-rise tests,short-time withstand current tests,peak withstand current tests,short-circuit current breaking capacity tests ,mechanical endurance,ect.Routine test before out of factory: mechanical performance test,mechanical characteristics tests ,power frequency withstand voltage tests on main circuit ,dielectric tests on auxiliary and control circuits,measurement of the resistance of the main circuit ,interlock operation tests,mechanical operation tests,electric operation tests,ect.

Scope of application

It is universally used in power plant , electric network , m e t a l l u r g y i n d u s t r y p e t r o c h e m i c a l i n d u s t r y a n d infrastructures,such as airport , subway, building.When the VMD2 circuit breaker used in distribution system, it can be applied to control and protect cable , trolly wire ,transformer, generator and capacitor bank.

Safety

VMD2 circuit breaker possesses perfect mechanical and electric interlock equipment , meanwhile ,its high reliable operating performance and mechanical endu ran ce, coo rdi nat ed with matched switchgear cabinet ,to ensure normal power distribution , operator and equipment's safety.

VMD2 completely satisfy the Standards Of GB1984 AC High voltage Breaker, GB/T 11022 -1999 Common Spec i f i ca t ions For H igh -Vo l tage Swi tchgear And Controlgear Standards, China Power Sector Standards DL403.And also meet the requirements of IEC62271-100, IEC56

and other main industrialized countries similar standards

VMD2 03 VMD2 04

The main features of embedded pole.

(1) High Reliability and Stability

Comparing with assembly pole, embedded pole use much lesser parts of conductor faying surfaces and jointing fastening piece, so that simplify the conductance circuit's assembly links, lower the circuit's resistance and improve galvanic circle's reliability and stability.

(2) Stable Insulating Ability

GB/DL

Vacuum interrupter embedded with epoxide resin solid material,to guarantee the minimized affection from external environment, and its external insulating ability will avoid the influence from dust,moisture,small animal,condensation and filthy,fully satisfy requirements of GB/DL standards of secondary filthy area.

(3) Firm Struction

It will give more sufficient protection for vacuum interrupter, free of mechanical collision in process of assembly and transportation.

(4) Miniaturization

(5) Free Maintenance

(6) More Environment Protection

SF6

Taking epoxide resin as insulating media to shorten the distance between poles and reduce the volume of VCB as well as the matched switchgear .

Pouring the pole as a whole ,vacuum interrupter gets fully protection and also the VCB benefit from its maintenance free.

Replacing SF6 as insulation , embedded pole circuit breaker is more environment protection in a certain extent.

Unique R contact desigh

Currently, mainly vacuum Interrupter of Chinese manufacturer are apply cup-shape vertical magnetic struction.VMD2 Vacuum circuit breaker apply unique vertical-magnetic-struction R contact which possess proprietary intellectual property rights, the vacuum interrupter with R contact, have much advantage as below:

Vertical electromagnetic field formed by breaking short circuit current is strong, heat capacity is good, therefore the ability of breaking short circuit current is powerful, restrick rate is low, reliability is high,it will meet the breaking requirement of 100% rated short circuit current.

R contact is integration manufacture, with high strength of struction, and won't be out of shape when making and breaking, reliable short circuit breaking ability.

R contact goes with beautiful desigh, high level of withstanding voltageIn 1250A hour R 9±1ìÙ In 2500A hour R 7±1ìÙ

Low line loop resistance: under rated contact pressure In 1250A hour R 9±1ìÙ In 2500A hour R 7±1ìÙ

With high reliable inclusive load and inductive load breaking ability

With high reliable groud fault current breaking ability

Under normal work, it goes with pretty low X ray radiation level, satisfy the environmental protection requires

2 Completely one-time embedded technics3 High-stable-quality ceramic metallized technics4 Stainless steel braze welding technics

Spring Drive Mechanism

Every detail of VMD2, we try to be the best.

The core component of VMD2 vacuum circirt breaker is vacuum interrupter, the interrupter we used is new style,with following features:

Circuit panel

The modularized secondary controlling circuit panel adopts auto- fastening connect ion-peg ,which is convenient for replacing and also ensure the r e l i a b i l i t y o f t h e e l e c t r i c connection

Making Module

The making module has characteristic of brief structure and reliable operating principle,thoroughly avoid some faults ,such as can't keep making, can't break and so on, meanwhile, reduce release power during opening state

Making/Breaking coil

The coil is whole sealing designed , keeping the coil out of moisture

Breaking buffer

High powered breaking buffer will reduce moving-contact overswing or rebounding extent when circuit breaker is in process of breaking, thus reduced the rate of re-arcing when breaking, assured the vacuum interrupter bellows' mechanical endurance.

Superficial treatment

80% mechanical parts apply Ni-P alloy treatment, greatly improved spare parts's anti-septic power,assure machine's stable quality all the time.

Whole mechanism's advantage

Operating mechanism's structure is simple, and operation is reliable, it goes with strong commonality, can be used in different specifications.Because it is our independent developed products,so we can specia led do i t according to customers's requirements.

VMD2

VMD2

P h2 h1 A B I W H

20~31.5kA

630~1250A

630A

1250A

150 205 260 502 503 492 35 650

210 205 260 650 653 648 35 800

210 275 280 650 653 648 35 800

150 275 280 502 503 492 35 650

210 275 280 650 653 648 49 800

150 275 280 502 503 492 49 650

637

618

VMD2

VMD2

P A B I W H

1600A 31.5/40kA 275 850 853 844 55 694

275 850 853 844 79 694

275 850 853 844 109 735

1000

P h2 h1 a b c d

630~1250A20kA~31.5kA

150 205 453 474.5 400 45 217.5

210 205 588 474.5 520 20 217.5

150 275 453 564.5 400 45 237.5

210 275 588 564.5 520 20 237.5

1600~2000A 31.5/40kA

2500A 31.5kA

2500~3150A 40kA

3150A 50kA

4000A* 40/50kA

P a c

630~1250A 31.5kA/40kA 275 770 720

275 770 720

275 770 720

3150A 40kA/50kA

4000A * 40kA/50kA

VMD2 05 VMD2 06

Overall dimension for VMD2 withdrawable circuit-breaker Overall dimension for VMD2 fixed circuit-breaker

Rated short-circuit breaking current Rated current Fitted cabinet s width

Parameter Fitted cabinet s width

Rated current

Parameter

Travel distance 8~10

Travel distance 8~10

View A

4-M12 depth 20

M16 depth 30

M12 depth 20

2-M10 depth 15

Remark:1.while the rated current reach to more than 2500A, the breaker must be with cool cap2.* is stand for that the rated current can up to 4000A while use forced draught cooling instead of free convection cooling

View A

Remark:1 . when the rated current reach to more than 2500A, the breaker must be with cool cap2.* is stand for that the rated current can up to 4000A while use forced draught cooling instead of free convection cooling

VMD2 07 VMD2 08

The technical parameter of Energy-storage motor

Model Rated voltage Rated input power Scope of work voltage

85%-110% of the rated voltage

The technical parameter of making/breaking coil and correlative electric elements

Items Breaking coilMaking coil Latch coil Anti-pumping relay

The rated work voltage

Rated working current

Rated power

Scope of working voltage

65%-120% of the rated work voltage.The breaker can't opening if less than 30% of the rated work voltage

85%-110% of the

rated voltage

Secondary controlling circuit scheme

controlling voltage Latch scheme Anti-pumping scheme Under voltage release scheme Over-current release scheme

with latch

without latch without anti-pumping relay

with under voltage release

without under voltage release

with anti-pumping relaywith over-current release

Quantity of over-current release The value of moving current

Two sets or Three sets 3.5/5/7.5/10

without over-current release

NO Item Unit Technical Date

Rated voltage

Rated insulating level

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