vacuum circuit breaker indoor - nbmingde.com structure: circuit breaker's primary conductance...
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VACUUM CIRCUIT BREAKER
INDOOR
VMD4 01 VMD4 02
Circuit Breaker's Overall Structure
Spring drive mechanism and circuit breaker principle parts adopt integration design, primary conductance circuit and mechanism adopt front and rear layout, conductance circuit locates behind of circuit break, driving mechanism is front of circuit breaker, handcart pushing mechanism is under circuit breaker, and possess compact construction and small size.
According to different requirements, there are two types of conductance circuit in VMD4 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.
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
Conductance Circuit Adopts Assembly Pole or Embedded Pole Structure.
High compatibility and widely application
The dimension of VMD4 serious indoor breaker is same as foreign famous breaker ,such as ABB VD4,so it be a excellent alternative
of foreign famous breaker.
Widely applicable scope,It not only can be match Chinese KYN28-24 switchgear, but also can be match all kinds of foreign
Switchgear
.
Flexible Installing Method
VMD4 series indoor VCB's spring drive mechanism is plane layout, holding manual energy storing and motor energy storing
function, compact outside size, good overall rigidity, reliable operation.
Reliable Integrating Spring Drive Mechanism
VMD4 03 VMD4 04
1 R Unique R contact desigh:
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R R
Currently, mainly vacuum Interrupter of Chinese manufacturer are apply cup-shape vertical magnetic
struction.
VMD4 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:
1)
100%
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.
2)R
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.
3)R
R contact goes with beautiful desigh, high level of withstanding voltage
4) ,In 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
5)
With high reliable inclusive load and inductive load breaking ability
6)
With high reliable groud fault current breaking ability
7) X
Under normal work, it goes with pretty low X ray radiation level, satisfy the environmental protection requires
2 Completely one-time embedded technics
3 High-stable-quality ceramic metallized technics
4 Stainless steel braze welding technics
The main features of embedded pole.
The core component of VMD4 vacuum circuirt breaker is vacuum interrupter, the interrupter we used is new style,with following features:
VMD4 05 VMD4 06
spring operation mechanism
Every detail of VMD4, we try to be the best.
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
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.
Circuit panel
The modu la r i zed secondary controlling circuit panel adopts auto-fastening connection-peg , w h i c h i s c o n v e n i e n t f o r 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/Breaking coil
The coil is whole sealing designed , keeping the coil out of moisture
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 specialed do it according to customers's requirements.
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Overall dimension for VMD4 Assembly pole Withdrawable type circuit-breakerOverall dimension for VMD4 Embedded pole Withdrawable type circuit-breaker
20/25/31.5
79
kV
A
kA
mm
mm
24
1600 1600/2000/2500
20/25/31.5
55
1000 1000
Rated voltage
Rated current
Rated short-circuit breaking current
Fitted fixed contact s size
Fitted cabinet's width
20/25/31.5
79
kV
A
kA
mm
mm
24
1600 1600/2000/2500
20/25/31.5
55
1000 1000
Rated voltage
Rated current
Rated short-circuit breaking current
Fitted fixed contact s size
Fitted cabinet's width
kV
A
kA
mm
mm
P mm
A mm
G mm
B mm
mm
mm
24
630/1250
20/25/31.5
35
800
210
650
638
653
612
634
1000
275
850
842
853
794
816
Rated voltage
Rated current
Rated short-circuit breaking current
Fitted fixed contact s size
Fitted cabinet's width
Pole distance P
Chassis wheel's width A
The breaker's width G
Chassis cart's width B
Inner width of valve mechanism wheel
Width of valve pushing board
kV
A
kA
mm
mm
P mm
A mm
G mm
B mm
mm
mm
24
630/1250
20/25/31.5
35
800
210
650
638
653
612
634
1000
275
850
842
853
794
816
Rated voltage
Rated current
Rated short-circuit breaking current
Fitted fixed contact s size
Fitted cabinet's width
Pole distance P
Chassis wheel's width A
The breaker's width G
Chassis cart's width B
Inner width of valve mechanism wheel
Width of valve pushing board
valve mechanism wheel valve mechanism wheel
valve mechanism wheel valve mechanism wheel
Travel distance 8~10Travel distance 8~10
Cooling frame
The surface of guide rail
The surface of guide railThe surface of
guide rail
The surface of guide rail
Cooling frame
Travel distance 8~10
VMD4 09 VMD4 10
Overall dimension for VMD4 Assembly pole fixed type circuit-breakerOverall dimension for VMD4 Embeded pole fixed type circuit-breaker
kV
A
kA
24
1600/2000/2500
20/25/31.5
Rated voltage
Rated current
Rated short-circuit breaking current
kV
A
kA
24
630/1250
20/25/31.5
Rated voltage
Rated current
Rated short-circuit breaking current
kV
A
kA
24
630/1250
20/25/31.5
Rated voltage
Rated current
Rated short-circuit breaking current
kV
A
kA
24
1600/2000/2500
20/25/31.5
Rated voltage
Rated current
Rated short-circuit breaking current
Cooling frame
Depth 20
Depth 20
View A
View A
View A
View A
View A
View A
View A
View A
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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 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
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 8mm, and the average. Making speed is that of contactor s last 8mm.
VMD4 13 VMD4 14
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