VN1 36+Manual

8/6/2019 VN1 36+Manual

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VN1-36 SeriesMedium Voltage Vacuum Circuit Breaker Cooper Nature

8/6/2019 VN1 36+Manual


VN1-36 SeriesMedium Voltage Vacuum Circuit Breaker

WarningAlways observe the instruction manual and follow the rules of good engineering practice !

Hazardous voltage can cause electrical shock and burns.Disconnect power, then earth and short circuit before proceed with any operation on this equipment.

If you have any further questions on this instruction manual, the members of ourfield organization will be pleased to provide the required information.

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8/6/2019 VN1 36+Manual


Cooper Nature ( Ningbo ) Electric Co., Ltd.

Your safety first-always!

Danger!

That ' s why our inst ruc t ion manual begins wi th theserecommendations:

= Only install switchgear and/or switchboards in enclosed rooms suitablefor electrical equipment.

= Ensure that installation, operation and maintenance are carried out byprofessional electricians only.

= Comply in full with the legally recognized standards(IEC), the connectionconditions of the local electrical utility and the applicable safety at work

regulation.= Observe the relevant information in the instruction manual for all actions

involving switchgear and switchboards.

Pay special attention to the hazard notes in theinstruction manual marked with this warning symbol.

= Make sure that under operation condition of the switchgear orswitchboard the specified data are not exceeded.

=Keep the instruction manual accessible to all persons concerned

with installation, operation and maintenance.= The user's personnel are to act responsibly in all matters affect-

ing safety at work and the correct handling of the switchgear.

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1. Summary ................................................................. 11.1) General ........................................................................... 1

1.2) Standards and specifications ........................................ 11.3) Operating conditions ..................................................... 1

2. Technical data ........................................................ 32.1) VN1 circuit-breakers main technical data ...................... 3

2.2) VN1 circuit-breakers main mechanical technical data... 42.3) Technical data of releases and charging motor ............ 4

2.4) Operation cycles diagram.............................................. 52.5) Dimension...................................................................... 6

2.6) Electrical circuit diagram ............................................... 7

3. Structure and function..................................... ...... 83.1) Structure of the breaker poles ....................................... 83.2) Structure of the breaker operating mechanism ............ 83.3) Function ....................................................................... 10

4. Dispatch and storage......................................... .. 124.1) Condition on delivery ................................................... 124.2) Packaging ..................................................................... 124.3) Transport ...................................................................... 124.4) Delivery ........................................................................ 124.5) Intermediate storage ................................................... 12

5.Installation ............................................................. 13

6. Commissioning/Operation .................................. 136.1) Note on safety at work ............................................... 136.2) Preparatory activities .................................................. 13

7. Maintenance ........................................................ 147.1) General ........................................................................ 14

7.2) Inspection and functional testing ............................... 147.3) Repair .......................................................................... 15

8. Order ..................................................................... 15

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1.1 GeneralThe vacuum circuit-breakers VN1 of withdrawable parts for 36 kV rated voltage are intended for indoor installation

in air-insulate switchgear systems. Their switching capacity is sufficient to handle any conditions arising from

switching of equipment and system components under normal operating and fault conditions, particularly short-

circuits, within the parameters of their technical datas.

The vacuum circuit-breakers are supplied as withdrawable modules. Their basic structure is shown in figures 3/1

and 3/2.

1.2 Standards and specifications1.2.1 Switchgear manufacture

The switchgear complies with the following specifications in accordance with GB and the relevant IEC

publications respectively:=GB/T 11022, IEC 60694 Common technical specifications for high-voltage switchgear and controlgear standards

=GB 1984, IEC 62271-100 high-voltage alternative current circuit breaker

1.3 Operating conditions1.3.1 Normal operating conditionsAccording to GB/T 11022,"Common technical specifications for high-voltage switchgear and controlgear stan-

dards" and IEC publication 60694 with the following limit values:

Ambient temperature:

- Maximum: + 40

- Highest mean value measured over 24 hours +35

- Minimum (according to "minus 15 indoor class") -15

Humidity:

- Maximum mean value measured over 24 hours 95 %

- Maximum mean value measured over 1 month 90 %- Maximum vapour pressure over 1 month 1.8kPa

- Maximum mean vapour pressure value measured over 24 hours 2.2kPa

Maximum site altitude: 1000 m above sea level

Maximum earthquake 8 class

1. Summary

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1.3.2 Special operating conditionsSpecial operating conditions are to be agreed on by the manufacturer and user. The manufacturer must be con-

sulted in advance about each special operating condition:

Site altitude over 1000 m:- Allow for the reduction in the dielectric strength of the air

Increased ambient temperature:- Current carrying capacity is reduced- Provide additional ventilation for heat dissipation

Climate:- Avoid the risk of corrosion or other damage in areas:- with high humidity and/or

- with major rapid temperature fluctuations- Implement preventive measures (e.g.electric heaters) to preclude condensation phenomena

Figure 1/1: Side view of withdrawable VN1 circuit breaker

VN1-36EVN1-36

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2. Technical data2.1 VN1 circuit-breakers main technical data

3

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No. Item Unit Parameters

1 Rated voltage kV 36/40.5

2 Rated frequency Hz 50/60

3 1 min Rated power frequency withstand voltage

kV95

Rated lightning impulse withstand voltage(peak) 185

4 Rated current A 630 1250 1600 2000 2500 3150

5 Rated short circuit breaking current kA 25 25 25 25 25 2531.5 31.5 31.5 31.5 31.5 31.5

6 Rated short circuit making current (Peak) kA63 63 63 63 63 63

80 80 80 80 80 80

7 Rated short time withstand current (4s) kA25 25 25 25 25 25

31.5 31.5 31.5 31.5 31.5 31.5

8 Rated peak withstand current kA63 63 63 63 63 63

80 80 80 80 80 80

9 Rated operating sequence

10 Rate operating sequence with autoreclosing

11 Arcing time ms ≤ 15

12 Class of mechanical endurance M2

13 Class of electrical endurance E2

14Class of restrike performance

C2during capacitive current switching

15 Mechanism life times 20000

16 Rated short-circuit current breaking cycles cycle 20

17 Rated cable charging breaking current A 50

18 Rated single capacitor breaking current A 400

19 Back to back capacitor breaking current A 400

20 Weight kg 240~290

=36kV is in accordance with IEC standards and 40.5kV complies with CNC.

O-0.3s-CO-180s-CO

O-0.3s-CO-180s-CO

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2.2 VN1 circuit-breakers main mechanical technical data

2.3 Technical data of releases and charging motor


1 Contactor space mm 18 ± 1

2 Over-travel mm 6 ± 1

3 Pole center distance mm 280 ± 1.5

4 Bounce time ms ≤ 3

5 Asynchronous operation between poles ms ≤ 2

6 Opening time ms 20~60

7 Closing time ms 35~70

8 Opening speed m/s 1.5~2.3

9 Closing speed m/s 0.8~1.3

Not include contact arm

10 µ Ω

Include contact arm

11 Rebound range of break contactor mm ≤ 2

4

Single phasecircuitresistance


1 Rated voltage V AC220 85%~110%

DC220,DC110 80%~110%

2 Power consumption W 370of releases

3 Power consumption of motor W 100

4 Rated voltage of motor V AC220,DC220,DC110 80%~110%

5 Charging time s ≤ 15

=The date varies with different interrupters

Shunt release OFF

Shunt release OFF

Shunt release ON

Shunt release ON

630A 1250A 1600A 2000A 2500A 3150A

40 40 35 25 25 25

55 55 50 35 30 30

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2.4 Operation cycles diagram

VN1 circuit breaker rated short-circuit breaking current 25kAVN1 circuit breaker rated short-circuit breaking current 25kA

VN1 circuit breaker rated short-circuit breaking current 31.5kA

5

Thebreakingno.

Thebreakingno.

=1250A/25kA 1600A/25kA 2000A/25kA 2500A/25kA

=1250A/31.5kA 1600A/31.5kA 2000A/31.5kA 2500A/31.5kA =3150A/31.5kA

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2.5 Dimension

Dimemions for VN1-36E Vacuum Circuit breaker with Embedded poles

Dimemions for VN1-36 Vacuum Circuit breaker with assembled poles

6

Rated current A1250A ø49 (ø35)1600A ø55

2000/2500/3150 ø79

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2.6 VN1 Vacuum circuit breaker electrical circuit diagram

Earthingloop

Over-currentloop

Energystorageloop

Closingloop

Blocking

loop

Openingloop

Auxiliaryswitchloop

Testposition

Work postion

TechnicalRequirement

1. The state of circuit breaker: no energy storage, opened position of the circuit

breaker,test positionof the truck.

2.Use 1.5mm

2 wire forcontrolloopwhile 2.5mm

2 wire forgroundinguse.

3.XTselects 58-pinhole aviationplug.

4.Y7,Y8,Y9,Y1and K0are optional.

5.WhenDCpowersupplied,cancelrectifiercell(V1-V4),thefunctioninbrokenline

shouldbe same.

6. Optional function configuration. (Note:KO, V1~V4, L1~L11, A1~

A14, B1~B15,

R0-R1are the cellinthe)

Sign

Name

Function

HQ

Closing Release

Controlclosingofcircuitbreaker

TQ

Opening Release

Controlopeningofcircuitbreaker

M

EnergyStorage MotorMotorStorageenergyforclosing

ofcircuitbreaker

HK

AuxiliarySwitch

ShiftCOoperation

V1~V4

RectifierCell

Rectifycircuit

XT

AviationPlug

Header of controlwires

LXØ

WiringTerminal

Connecttotruckwires

KO

Anti-pumping Relay

Preventcircuitbreaker release

S P 1

~ S P 3

MicroSwitch

Shiftafter closingspringenergyis stored

SP5

LimitSwitch

Lockingfunction

S8

Auxiliary Switchinthe chassis

Shiftattestposition

S9

Auxiliary Switchinthe chassis

Shift at working position

Y1

Locking Magnet

Contorllockingloop

RO~R1

Resistance

Dividedresistance

Y7~Y9

Over-currentRelease

Over-currentprotection

L1~L11ConnectingWire

Transfer function

k ç í É

p á Ö å

= ã É ~ å ë ï á ê á å Ö = ï Ü á ä É= Ä ä ~ å â= ë é ~ Å É= ã É ~ å ë ç é É å á å Ö K

N u m b e r o f W

i r eL1

L2

L3

L4

L5

L6

L7

L8

L9L10L11

bag h

f e

dc

af

fg

cb

ij

k LLm

pq

W i r i n g

C o n f i g u r a t i o n w

i t h l o c k i n g

W i t h

a n t i p u m p i n g

f u n c t i o n

w i t h o u t

l o c k i n g

w i t h l o c k i n g

w i t h o u t

l o c k i n g

W i t h o u t a n t i -

p u m p i n g

f u n c t i o n

AC/DC

110V

AC/DC

220V

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3. Structure and function

Figure3/1 Side view of withdrawble VN1 circuit breaker 3.1.1 Insulating pole tube3.1.2 Front partition plate

Figure 3/2 Partial section of vacuum interrupter 3.2.1 Moving electric stem3.2.2 Guide cylinder3.2.3 Lid3.2.4 Enveloping ring3.2.5 Bellows

3.1 Structure of the breaker poles

The 36kV circuit-breakers VN1 are designed as withdraw-able units. The poles, which are constructed in column

form, are mounted on a torsionally rigid enclosure sub-structure with rollers. The live parts of the breaker poles

are located in the insulating material pole tubes and pro-tected from impacts and other external influences.

With the breaker closed, the current path leads from the

upper contact arm and a chamber holder fixed in the pole

tube to the fixed contact in the vacuum interrupter, thenvia the moving contact and roller contact to the lowercontact arm. The switching motion is effected by means

of the insulated coupling rod with internal contact forcesprings.

The basic structure of a vacuum interrupter is explained

in figure 3/2

3.2 Structure of the breaker operatingmechanism

The operating mechanism is NT spring type mechanismjoint designed by Chinese and Germany experts. The op-

erating mechanism is both fitted with motor and manu-ally charging.

There is a closing unit, one or more releases, auxiliary

switch, the controls and instruments

It is set C/O button, manual charging holes, ,spring charg-ing indication plate, C/O indication plate.

3.1.1

3.1.23.1.3

3.1.4

3.2.6 Shield3.2.7 Contacts3.2.8 Terminal

3.2.9 Ceramic insulator

3.2.1

3.2.2

3.2.33.2.4

3.2.53.2.6

3.2.7

3.2.8

3.2.9

3.1.3 Lower contact arm3.1.4 Wheel

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3.3.1 Charging motor3.3.2 Socket for charging lever3.3.3 Closing bar3.3.4 Buffer3.3.5 Charging spring3.3.6 Charging condition indicator3.3.7 Link rod3.3.8 Main shaft3.3.9 Opening bar3.3.10 Chain

3.3.9

3.3.6 3.3.7

3.3.1

3.3.33.3.4

3.3.5

3.3.2

3.3.8

3.3.10

3.4.1 Catch pin3.4.2 Socket for manual charging3.4.3 Rated plate3.4.4 Guide cam3.4.5 Actuating pin3.4.6 Charging condition indicator

3.4.6

3.4.9

3.4.10

3.4.113.4.12

3.4.1

3.4.2

3.4.3

3.4.4

3.4.5

3.4.8

3.4.7 ON-OFF condition indicator3.4.8 Operating cycle counter3.4.9 Link rod3.4.10 ON-OFF operating shaft3.4.11 Spindle3.4.12 Sliding handle

Figure 3/4 Control parts of withdrawable VN1 circuit breaker

3.4.7

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Figure 3/3 Spring charging operation mechanism

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3.3 Function3.3.1 Charging of the spring mechanism

To provide the necessary motive energy, the spring energy storage mechanism is charged via kinematic link fittedwith ratchet wheel, either automatically by a charging motor or by hand in a vertical pumping action with charging

lever. The current charging condition is shown by charging condition indicator. As a precondition for anautoreclosing sequence, the operating mechanism is either (re-)charged after a closing operation automatically bythe charging motor, or by hand if the operating mechanism is of the manual type.

3.3.2 Closing principle

The closing process is initiated manually by the double bit key and the ON-OFF operating shaft, or electrically by

activation of shunt release.The release mechanism then permits drive shaft to be rotated by the (previously) spiral

charged spring. The moving contacts in vacuum interrupter are moved until the contacts are connected with thefixed contacts. In the further sequence of motion, spring arrangement is tensioned and the appropriate amount ofcontact force thus applied. The available overtravel is higher than the maximum value of contact erosion during

lifetime of the interrupter. During the closing process,opening springs are simultaneously tensioned.

3.3.3 Opening principle

The opening procedure is initiated manually by the triple bit key and the ON-OFF operating shaft, or electrically by

activation of one of the releases TQ, Y7, Y8 or Y9. Observe the notes in section on control of the releases. Releasemechanism then permits drive shaft to be turned further by the spring energy storage mechanism, which is stillsufficiently charged. The opening spring, which is thus released, moves the contact into the open position at adefined speed.

Figure 3/5 Operation accessories3.5.1 Charging lever3.5.2 Hand crank for moving the truck

3.5.3 Triple bit key(ON-OFF operation)

3.3.4 Autoreclosing sequence

Auto-reclosing sequence of O-C or O-C-O is started and

controlled by the protection system. When circuit breakeris in the closed position, spring in operating mechanism

must be in the energy storage position, and after breakerclosing, the energy storage process is carried out auto-matically by charging motor. Charging process must becarried out manually without charging motors (or when

the charging motor broken). Opening operation can becarried out during the charging process, but closing op-eration can’t be carried out until the charging process hasbeen completed and the blocking has been released.

3.5.1

3.5.2

3.5.3

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3.3.5 Interlock and locking facilities.

Because of the withdrawable circuit breaker being matched with ASN1-36 switchgear , a series of interlocks areprovided to protect personnel and to prevent dangerous situations and maloperation. Otherwise that may lead

to serious consequences. The individual effective interlocks are as follows:

The truck can only be moved from the test/isolated position into the service position (and vice versa)

when the circuit breaker and earthing switch are open and the door is closed.

The circuit breaker can only be closed when the truck is fully engaged in the test or service position.

The door cannot be opened when the truck is in the service position.

For a mechanically latched circuit breaker, with the truck in the test position, and without control voltage,

it is only possible to open (not close) it manually.

With the truck in the test/isolated position the secondary pin can be pull out.

The earthing switch can be closed only when the truck is in the test/isolated position.With the circuit breaker closed, the truck cannot be moved from the service position into the test/isolated

position.

Details of any additional interlocks, e.g. in connection with a blocking magnet on the truck and/or earthing

switch operating mechanism, can be found in the project specific documents.

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Figure 4/1: Only handle by crane when the transport brackets and crane cross-beams are fitted. Always bear in mind that the high situated centre of gravity may induce the breaker to tip over!

4.1.1 Front partition plate (Do not stress this plate during transport)4.1.2 Transport bracket (TK)

4.1.3 Transport profile (TP)

4.1.2

4.1.1

4.1.3

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4.1 Condition on deliveryThe factory-assembled circuit-breakers on withdrawable parts are checked at the works for completeness of the

equipment installed and simultaneously subjected to a routine test in accordance with GB1984, or IEC 62271-100,

GB/T11022, IEC60694, VDE 0670 thus verifying their correct structure and function.

4.2 PackagingThe circuit-breakers should be in the switch position OFF and the stored-energy spring mechanisms discharged.

First sealed with aluminum foil and put some dryer, then packed on wooden pallets, in the end packed by veneer.

4.3 TransportLoading of the package units must only be carried out with a

crane

fork-lift truck

trolley jack

Notes:Avoid impact during handling.

Do not subject to other damaging mechanical stresses.

Lifting gear must not be attached to the breaker poles or parts of the operating mechanism.

When moving the withdrawable part only use the sliding handles (e.g. for racking in/out the circuit-breaker

unit into/out of the switchgear panel or for the transport of the unit in the switchgear room). Do not bring

any force on the front partition plate of the withdrawable part.

With its relative high situated centre of gravity, cannot tip over when moving it by crane or fork-lift truck, or

when handling it outside the switchgear room.

4.4 DeliveryThe duties of the consignee on receipt of the switching devices at site include the following:

Checking the delivery for completeness and freedom from damage (e.g. moisture and itsadverse effects).

Any short quantities, defects or damage in transit:

- Must be precisely documented on the consignment note.

- Always take photographs to document any major damage.

4.5 Intermediate storageIntermediate storage of the circuit-breaker in the switch position OFF and with the stored-energy spring mecha-

nisms discharged

Conditions for optimum intermediate storage:4.5.1. Devices with basic packaging or unpacked:

A dry and well ventilated storeroom with climate in accordance with GB/T11022,IEC 62271

Room temperature which does not fall below-15

Do not remove or damage the packaging.

Unpackaged devices:

4. Dispatch and storage

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Maintenance serves to ensure trouble-free operation and achieve the longest possible working life of the switchgear.

Inspection: Determination of the actual condition

Servicing: Measures to maintain the specified condition

Repair: Measures to restore the specified condition.

7.1 GeneralVacuum circuit-breakers are characterized by their simple and robust construction. They have a long life expectancy.

Their operating mechanisms have a low maintenance requirement, and the interrupters are maintenance-free

during their working life. There is no adverse effect on the vacuum, even from frequent switching of operating and

short-circuit currents. The servicing intervals and scope are determined by environmental influences, the switch-

ing sequences and number of short-circuit breaking operations. With carefully performed inspections and servic-

ing work, and under normal operating conditions, the circuit-breakers, depending on the type, have a service life ofup to 20,000 operating cycles and more.

Note:The following must be observed for all maintenance work:

=The relevant specifications in section 1.2.2=Notes on safety at work in section 6.1=Standards and specifications about installation stipulated by local state.

Maintenance work may only be performed by fully trained personnel, observing all the relevant

safety regulations. While the work is in progress, all auxiliary voltage sources must also be disconnected and

secured to prevent reconnection.

Note: ln order to prevent accidents (particularly injury to hands!) extreme care should be taken during allrepair work on the operating mechanism, especially with front cover plates removed.

The spring in the spring energy mechanism, for instance, retains a basic tension which is independent of the

charging and discharging processes during switching, so as to ensure correct function. This spring energy can be

inadvertently released if work is performed incorrectly on the spring mechanism!

7.2 Inspection and functional testing7.2.1 Switching devices in generalIf cleaning is found to be necessary during Inspections,the following procedure is to be adopted:

=Prior to cleaning, the working area is to be isolated and secured against reclosing where necessary in accordance with the safety regulations

=Cleaning of the insulating material surfaces Wipe down after cleaning, using clean water, and dry properly. Use only halogen free cleansers, and in no case trichlorethylene or carbon tetrachloride!

7.2.2 Stored-energy spring mechanismMaintenance for the spring mechanism is to be performed after 5,000 operating cycles.

Details of the maintenance:=Prior to maintenance, switch the breaker off, and isolate the outgoing feeder. Observe the safety regulations!=Swich off the charging motor (if fitted), and discharge the spring energy storage mechanism by closing

and opening the breaker once.=Replace parts subject to high climatic and mechanical stresses as a precaution

=Relubricate pawls, support shafts, sliding and rotating bearing surfaces Lubricant

7. Maintenance

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15

=Check the fit of fasteners (e.g. locking pins) in cranks, pins, bolts etc. Check the tightness of fastening bolts.=Always replace any spring lock washers, split pins and other fasteners removed during the work with new

parts when reassembling the equipment.=Check the general condition of the operating mechanism and recharge the spring energy store.=Perform comprehensive mechanical and electrical functional tests.=Ensure that the bolted joints at the contact locations of the conductor bar system and the earthing con

nections are tight.

Note: This work may only be performed by the after-sales service personnel or adequately qualified personnel.

7.3 Repair Replacement of circuit-breaker parts and accessories

Remove and reassemble circuit-breaker parts and accessories only when the breaker has been switched off

and the working area is to be isolated and secured against reclosing. The spring energy storage mechanism

must be discharged.

All auxiliary power supply must be disconnected and secured against reclosing during the removal and

installation work.

8.Order

To order VN1-36/VN1-36E vacuum circuit breaker,should indicate the following techni-cal data:Type of circuit breaker

Rated voltage, rated current, breaking capacityRated voltage of any electrical spare part (motor,opening/closing releases etc)Spare partsShunting opening release

Shunting closing releaseOver-current release (optional)

Under-voltage release (optional)Charging motor

Locking electromagnet (optional)Position contact of withdrawable truck

Auxiliary contactsSignal device for open/close

Signal device for sping charged/dischargedOperation counter

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Marketing DepartmentTel: +86-574-63486522Fax: +86-574-63486919

International Business DepartmentTel: +86-574-63486511Fax: +86-574-63486511E-mail: [email protected]

Cooper Nature (Ningbo ) Electric Co., Ltd.New Hangzhou Bay Zone, Cixi, Zhejiang, China, 315336

Tel: +86-574-63486522Fax: +86-574-63486511

Switchgear Sales DepartmentTel: +86-574-63486388 63486702Fax: +86-574-63486388 63486503

Circuit Breaker Sales DepartmentTel: +86-574-63486222Fax: +86-574-63486222

Central District OfficeAddress: Room2702, Jinse Waterfront Integrated Apartments, No.

55 Waterfront East Road, Nanchang City, Jiangxi ProvincePost code: 330077Tel: 86-791-8106068Fax: 86-791-8106098

Southern District OfficeAddress: No. F Yugao Buildings, Stone and Bridge Road, Nine Drago n

Zone, Chongqing City

Post code: 400039Tel: 86-23-68889825Fax: 86-23-68889825

Cooper Electric (Shanghai) Co., LtdAddress: No.955 Shengli Road, Zhangjiang high technique east

zone, Pudong zone, ShanghaiPost code: 201201Tel: 86-21-28993600Fax: 86-21-28994254Website: www.cooperchina.com

Northern District OfficeAddress: Room1801, Unit1, The 1st Commercial and Residential

Apartment, No.265 Zhongshan East Road, Shijiazhuang

City, Hebei ProvincePost code: 201201Tel: 86-311-85525171Fax: 86-311-85525170

Documents

VN1 36+Manual