VACUUM CIRCUIT BREAKER

INDOOR

VMD5 01 VMD5 02

Technical standard

General Provisions

The VMD5 series indoor circuit-breaker is our independent

developed new generation 40.5 kV vacuum circuit breaker. Its

main characters as follows: the conductance circuit is installed

in an three-phase insulating sleeve , its mechanism and

conductance circuit adopts front and rear layout. And the

design of mechanism is our newly developed, with simple

construction, rel iable operation,and rich manufacturing

experiences of million sets , used and learned by many high-

end vacuum circuit breaker manufacturers.

Testing

VMD5 series circuit breaker has passed following test Type tests : power frequency withstand voltage tests,lightning impulse withstand voltage tests,temperature-rise tests,short-t ime w i ths tand cur ren t tes ts ,peak w i ths tand cur ren t tests,short-circuit current breaking capacity tests ,mechanical endurance,ect.Routine test before out of factory: mechanical performance test,mechanical characteristecs tests ,power frequency withstand voltage tests on main circuit ,dielectric tests on auxiliary and control circuits,measurement of the resistance of the main circui t , inter lock operat ion 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 VMD5 circuit breaker is in distribution system, it can be applied to control and protect cable , trolly wire ,transformer, generator and capacitor bank.

Safety

VMD5 circuit breaker possesses perfect mechanical and electric interlock equipment , meanwhile ,its high reliable operating performance and mechanical endurance,coordinated with matched switchgear cabinet ,to ensure normal power distribution , operator and equipment's safety.

VMD5 completely satisfy the Standards Of GB1984 AC High

voltage Breaker, GB/T 11022 -1999 Common Specifications For

High-Voltage Switchgear And Controlgear Standards, China

Power Sector Standards DL403.

Also meet the requirements of IEC62271-100, IEC56 and other

main industrialized countries similar standards

VMD5 03 VMD5 04

The spring operation mechanism and breaker is designed integration structure that mechanism and primary conductance circuit are located are front-to-back layout.The detail of distribution as follows: conductance circuit is locate in back of breaker, mechanism is in front of breaker, handcart parts is under side of breaker.Whole structure is featured by compact construction, reasonable distribution and small-volume.

The mechanism is plane layout, holding manual energy storing and motor energy storing function, compact outside

size, good overall rigidity, reliable operation.

According to different requirement, there are two type of conductance circuit in VMD5 series indoor vacuum circuit breaker ,namely assembly type and embedded type.

ASSEMBLY STRUCTURE: Circuit breaker's vacuum interrupter is fixed in insulating tube, whose material is epoxide resin, with reliable electrical performance,and introduce advanced APG technics. All of this , getting insulating tube as a support force when installation, and with alternating ,opposite insulating function. The design of this insulating tube gives full consideration on national standard and regorous working conditions,prevent from any external environment affects on vacuum interrupter,without dust and foreign bodies into leading circuit, but also will assure high-inpedence state to voltage affection even under muggy and serious nasty environment.

Conductance Circuit Adopts Assembly Pole or Embedded Pole Structure.

The breaker have two type : middle-positioned and roll-on-floor type, both will conveniently realized Five-Pretecting Interlock.It can be installed in all kinds of switchgear both Chinese and foreign.

Flexible Installing method Integration structure

Reliable integrating spring drive mechanism

VMD5 09 VMD5 10

VMD5

VMD5VMD5

Overall dimension for VMD5A-40.5 middle-positioned withdrawable circuit-breaker

Overall dimension for VMD5BT-40.5 Assembly pole type roll-on-floor circuit-breaker Overall dimension for VMD5BG-40.5 Embeded pole type roll-on-floor circuit-breaker

A

20/25/31.5

kA mm mm mm

31.5

630 49 CT-30

1250 49 CT-30

1600 55 CT-36

2000 79 CT-48

1400

Rated current Rated short-circuit breaking current Fitted fixed contact s size Fitted cabinet's width Contact

A

20/25/31.5

kA mm mm mm

31.5

630 49 CT-30

1250 49 CT-30

1600 55 CT-36

2000 79 CT-48

2500 109 CT-64

1400

Rated current Rated short-circuit breaking current Fitted fixed contac s size Fitted cabinet's width Contact

EMBEDDED STRUCTURE: circuit breaker's primary conductance circuit

adopts embedded pole , with advanced automatic pressure gel APG

technic, directly casting vacuum interrupter and primary conductance

circuit's other parts in special epoxide resin ,taking a shape of leading

circuit module. Embedded pole's installing end carry out double skirt

design,this embedded pole equipped with following features: large

leakage distance, high mechanical intensity, high component precision,

less components, needn't secondary adjustments ,etc.Pole pillar's

electrical field is well- distributed, avoid the destruction to organic

insulating from part electric field concentration. Meanwhile, this kind

design will simplify primary conductance's assembly,completely avoid

the problem that conductance circuit's connecting bolt will loose when

operating, which guaranteed conductance circuit's reliability,realized the

possibitly of free-maintenance in first conductive circuit.

VMD5 11 VMD5 12

Rated current

NO Unit Technical DateItem

Rated voltage

Rated insulatingleve

Rated short time power frequency withstand voltage(1min)

Rated lightning impulse withstand voltage (peak value)

Rated Frequency

Rated short circuit breaking current

Rated short time withstand current

Rated peak withstand current

4s rated short-time withstand current

Rated peak value of current

Rated short-circuit making current (peak value)

Duration of rated short-circuit current

Mechanical endurance

Rated making surge current of capacitor bank1000Hz

Rated breaking current of single/symmetrical capacitor bank

Breaking times at rated short-circuit current

Power frequency withstand voltage of secondary circuit

Rated operating voltage

Rated operating order

Energy storage times

Clearance

Travel

Pole distance

Bounce time (making)

Three pole making /breaking non-simultaneity1Average breaking speed

2Average making speed

Making time

Breaking time

Contact pumping(breaking)

Permitted abrasion thickness of moving and fixed contacts

Conductance circuit resistance

The average breaking speed refers to the average speed of contactor s first 12mm, and the average making speed is that of contactor s last 12mm.

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 coil Making 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 lacth

Without latch without anti-pumping relay

with under voltage release

without under voltage release

with anti-pumping relay with 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

VMD5 13 VMD5 14

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Elementary Diagram For VMD5A-40.5 Withdrawable Type Vacuum Circuit Breaker Elementary Diagram For VMD5B-40.5 Withdrawable Type Vacuum Circuit Breaker

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