Eaton Arc Chamber Circuit Breaker

ZN63A(VS1) Series High Voltage Eaton Arc Chamber Circuit Breaker

ZN63A(VS1) series indoor high voltage vacuum circuit breaker (hereinafter referred to as circuit breaker)  is  used for 24kV and 50Hz three-phase AC power system and the rated current is 630A ~ 4000A. This type VCB is widely used in industrial and mining, enterprises, power plants, substations and other power  systems,  to  control  and  protect  cables,  overhead  lines,  changers, generators,  capacitor  banks,  motors,  etc.  The  VCB  is matched  with  the KYN28A-12  type  switchgear,  and  can  also  be  installed  in  XGN2   fixed switchgear.

The vacuum circuit breaker complies with GB1984, JB3855, DL403-2000 and IEC62271-100 standard with performance reaching C2-E2-M2 class.

A) The secondary control elements are all in front of the mechanism, which is convenient for inspection and maintenance;

B) Modular functional unit design, reasonable structure layout and easy for maintenance;

C)  Integrated  energy  storage   handle,  convenient  for   manual  energy storage operation;

D) Less parts, simple structure and convenient operation;

E)  The  cam  directly  drives  the   big  shaft  to   rotate,  which   has   high transmission efficiency;

F) New design concept, no need to do fastening adjustment;

G) Long life design, 30000 times mechanical endurance with small current, 20000  times  with   large   current,  10000  times  with   maintenance  free,   in accordance with M2 class;

H)  The  mechanism  can  be  equipped  with  assembly-type  insulating housing or embedded pole type main circuit components.

i) It can be directly interchanged with VD4-12 products.

Environment service condition

A) Altitude: 1000m and below.

B) Ambient temperature: not higher than + 40℃ , not lower than -  15℃ (storage and transportation at - 30℃ is allowed).

C) Relative humidity: daily average ≤ 95%, monthly average ≤ 90%, daily average of saturated steam pressure    ≤ 2.2 × 103Mpa, monthly average≤1.8 × 10-3Mpa. Condensation may occur when the temperature drops sharply in the high humidity period.

D) Seismic intensity: no more than 8 degrees.

E)  No  water  drop,  steam,  combustible  gas,  fire,  explosion  hazard, chemical corrosion and severe vibration.

Main technical data

Main technical data of VS1-12 series indoor VCB

Note:

1.  When  the   rated   short-circuit   breaking   current   ≤   31.5kA,   the   rated short-circuit breaking times are 50 times. When the rated short-circuit breaking current ＞ 31.5kA, the rated short-circuit breaking times are 20 times.

2. When the rated short-circuit breaking current is 40/50kA, the rated operation sequence is: O-180s-CO-180s-CO.

3. No. 11 and 12 are rated parameters provided when required.

Mechanical  Characteristic  Parameters  of  Circuit   Breaker  After Assembly and Adjustment

Note:  Values   in  parentheses  apply  to  products  with   rated current of 2500A and above.

Technical data of closing and opening electromagnet

Technical data of energy storage motor

 Product structure 

Main structure

The VCB adopts front and rear structure, VIs were installed in front and operating  mechanism  is  rear, the  main  circuit  adopts three-phase earthing structure. This design could make VI matched better to the performance of mechanism, meanwhile reduce the energy consumption and noise, and make the products more reliable.

The operating mechanism adopts the spring type of plane layout, with the function of manual energy storage. The operaying mechanism is placed in the mechanism chamber, which is in front of the VI. The mechanism chamber of the VCB is also used as the operating frame at the same time. The  operating mechanism  and  the chamber can be assembled separately. The energy storage, closing and opening parts of the mechanism are with fewer parts, which is compact, simple and high reliability.

All  VCB  with  different  currents  are  equipped  with  dust  cover  before ex-factory. During actual use, the dust cover doesn’t need to be removed if the rated current is under 1250A, but if over 1600A, considering about the cooling problem, the dust cover is required to be removed.

Vacuum arc extinguishing theory

The VI with cyat hiform axial magnetic field is installed in the VCB. The VI is with a high vacuum degree. When the fixed and movable contacts open  with charges under the force of operating mechanism, vacuum arc between the contacts will appear. Because the fixed and movable contacts have chutewith the same inclination direction, majority of arc current will be diffused on the circumference of the contacts when the arc current flows and axial magnetic field between the contacts will be formed. So that the arc will maintain diffused and evenly buring in the surface of the contacts,  and maintain a lower arc voltage. When the current passed to zero naturally, the residual ions, electrons, and metal vapor can aggregate or composite on the surface of contacts or shielding  cover  within  microseconds.  The  insulating  strength  of  dielectric across  open  contact of the VI  will  quickly  restore,  and  the  arc  will  be extinguished, achieving the purpose of breaking. Due to the use of advanced longitudinal magnetic field technology, this kind of arc extinction has strong and stable current breaking capacity.

Operation of VCB

1. Energy storage operation

1.1. There are 2 types for charging: manual charging and motor charging. Without closing power supply, the manual operation could be chose.Use  the manual operation could be chose. Use the manual charging handle of the mechanism to rotate according to the panel instruction. It will drive the gear shaft rotating, and drive the energy storage shaft to  move together with the  hanging spring connecting  lever, so as to stretch the  closing  spring to  complete  the  energy  storage  and  realize  the spring energy storage.

1.2 Under the situation of motor charging, the charging motor will output torque, and the gear shaft is driven to rotate, so as to stretch the closing spring to  complete  the  energy  storage.  At  the  same  time,  the  energy  storage micro-switch to cut off the power supply of energy storage motor and complete the whole energy storage operation.

2. Closing operation

After the  operating  mechanism  finished  charging, when the  closing  coil  is energized or the closing button on the panel is pressed, the closing half shaft is rotated, and the closing energy is released to realize the closing of the VCB.

After closing, closing and opening indication shows closing mark. Note：

A. When the VCB  is at  closing  position  or the  handcart-typed VCB  is moving, the closing operation cannot be realized;

B. If choose the electrical closing latching device with the external power supply (secondary control power supply) unconnected, the closing operation is forbidden.

3. Opening operation

After the closing is completed, receiving the opening signal or pressing the opening button displayed on the right side of the panel to push the opening half shaft to rotate. The half shaft loses the restriction on the opening buckle plate. With the compressed spring of the contact and the opening spring, the opening buckle plate rotates, so that the opening connecting lever on the main shaft is free from the restriction of the opening pallet to complete the opening action. Various interlock function device.

A) Anti-bouncer: after the VCB completes the closing operation, even if the VCB has been opened, it cannot be closed again under the condition that the closing command has not been cancelled.

If the switchgear has adopted the anti-bouncer of microcomputer protection, it is necessary to confirm whether the anti-bouncer needs to be installed. 

B) Locking device: prevent the VCB from closing when the secondary control without  power  supply  or  lower  than  the  technical conditions requirements (optional device).

The working voltage range of the locking coil is (65% ~ 110%) times the rated voltage.

C) Interlock function to prevent mal-operation.The VCB can provide perfect mal-operating function.

1) After the VCB completes the closing operation, the VCB cannot be closed again without opening.

2) After the VCB closed, if the closing signal is not released, the signal can not make the VCB close again, no matter the VCB is in the closing or opening state.

3) During the process from test position to working position of handcart-typed VCB, the VCB cannot be closed.

4) After the  handcart-typed  VCB  is  closed  at  the  test  position  or  working position, the circuit breaker cannot be rolled in or pulled out.

5) When the grounding switch closing, the handcart cannot be roll in (from the test position to work).

Installation and adjustment

Note

A) The installation, adjustment, operation and maintenance of the VCB should be  carried  out  by  the   personnel  specially  trained   and  familiar  with  the performance of the products, and the corresponding protection and preventive measures must be taken into account in the work.

B) When hoisting circuit breaker from the packing box, hang the hook at the clearly marked hoisting hole of the circuit breaker. During handling, the up and lower outgoing arm should not be stressed and the circuit breaker should not be subject to bigger shock vibration.

Installation

1. The VCB installed in the switchgear should not be subjected to any tension, pressure or deformation, and spring gasket or discgasket should be added at the installation point.

2. When connecting the main terminal, the main terminal should not be subject to permanent tension and pressure.

3. When connecting the busbar, the depth of the bolt placed must be greater than the thread diameter.

4. When  installing,  bolts  with  strength  of grade  8.8,  spring gasket or disc gasket should be used.

5. Remove the filth.

Adjustment

The circuit breaker has been performed the strictly factory test before delivery, all parameters can reach up to specified technical requirements. The following preparation work should be made before applying power to the primary circuit:

1. Check the circuit breaker for damage or other dangerous environmental impact. If there is such a phenomenon, it should be eliminated and restored to normal working conditions.

2. Clean the dirt, especially the surface of insulator, because contamination caused during shipment or storage period will affect insulation performance of the product.

3. Check whether the connection between the primary and secondary circuits and the earth electrode is correct.

4. Carry out power frequency withstand voltage test and check the insulation level.

5.  Operate  the VCB  manually  as  per  operation  specification  for charing, closing and opening operation, and observe the normality of charging condition and opening/closing position indication.

6. Operate the VCB with operation power for charging, closing and opening, and observe the normality of charging condition and opening/closing position indication.

7. Operate handcart-typed VCB as per following procedures:

Insert the rotation in handle in the push hole of chassis, rotate in clockwise direction is for moving in, and rotate in anticlocwise direction is for drawing out. The moving in total travel is around 200mm. When opening, it should enter the working position or experimental position clockwise.Ratate the handle for the 20 turns in clockwise direction with intermediate speed, when you heart the voice "Da", it means rotate to the end (do not use excessive force to avoid damaging the push-in mechanism).   At the same time, connect the corresponding position (S8, S9) circuit.

Maintenance

Outline Drawings for VS1-12PSeries

210 mm Phase Spacing, Embedded Pole, Handcart Type

210 mm Phase Spacing, Insulating Cylinder, Handcart Type

275 mm Phase Spacing, Insulating Cylinder, High Current, Handcart Type

210 mm Phase Spacing, Insulating Cylinder, Fixed Type

275 mm Phase Spacing, Insulating Cylinder, High Current, Fixed Type

275 mm Phase Spacing, Insulating Cylinder, High Current, Fixed Type

(Customized Interrupter, 50 kA)

Note

a)  Before maintenance, the VCB should be  in the opening and no energy storage state, completely insulated from the primary and control power supply, to ensure that the work site is not electrified.

b) The detergent should be suitable for plastic or synthetic rubber materials.  Under normal use conditions, the VCB does not need maintenance, but due to the different use environment, necessary maintenance work still needs to be carried out.

1.  The VCB  should  be  maintained  at  least  once  a  year  according  to  the workload, applying lubricating oil to the movable parts of the mechanism,  and cleaning the surface of the insulating parts.

2.if the VCB is placed for a long time, the movable part may be blocked, so that the VCB should be stored energy and opening/closing at least 5 times a year.

3. Insulation test should be carried out for the VCB at least once a year to determine whether the VI leaks air or the insulation strength is reduced due to other external reasons.

4. For frequent operation places, the operation times specified by the technical conditions should be strictly controlled with the allowable range and cannot be used beyond the service life.

5. Possible phenomenon occurs during the operation

Transportation and storage

Transportation

Only the following tools can be used for loading and unloading the packing box: crane, forklift or crane.

VCB  should  be  enclosed  and  fixed  in the package during transportation. Packing, unpacking and storage should be performed in a dry room. During VCB transportation, inversion, rain, shock and collision should be avoided. Once the VCB needs to be transported in a tertiary highway, the average speed cannot higher than 20km/h.

Delivery

The  factory  assembled  circuit   breakers  have  been  strictly  tested   before delivery  in  accordance  with  GB1984-2014  standard  and  factory  inspection procedures of circuit breakers to prove the correctness of their mechanisms and functions, and the factory inspection reports are enclosed to the attached documents.

After  receiving  the VCB, the receiving party should carry out unpacking insection as soon as possible, and try not to damage the packing box and other packing  materials  when  unpacking,  so  as  to  facilitate  medium-term storage.

Storage

1) Check whether the product model and specification are consistent with the contract.

2) Check whether the goods are complete.

3) Check whether there is any shortage of goods and attached accessories according to the delivery list and packing list.

4) The VCB should be stored in a dry, dust-free and well ventilated storage room, and the storage conditions should comply with the relevant provisions of GB/ T11022.

5) During energy storage, the VCB should be in the opening and no energy storage state.

6)  If  the  original   packaging  has  been  removed,  it  should  be  repacked according to the original packaging.

7) Regularly check whether there is condensation and damp.

Documents list

a) Certificate of quality                                          One copy

b) Delivery inspection report                                   One copy

c) Installation and operation instructions                  One copy

d) Chassis rocker (handcart-typed VCB)                   One copy

OEM/ODM Services

At Shaanxi Yuguang Electric Co., Ltd., we understand the importance of customization. That's why we offer comprehensive OEM and ODM services to meet your specific requirements. Whether you need private labeling or custom product development, our experienced team is here to assist you every step of the way.

Certificates

We take pride in our commitment to quality and safety. Our products are certified to meet the highest industry standards, including:

3C Certification

ISO 9001 Certification

21 Utility Model Patents and Design Patents

Why Choose Us

State-of-the-art Manufacturing Equipment

Extensive Testing Facilities

Comprehensive Quality Assurance Processes

ISO 9001 Certified Quality Management System

One-year Warranty on All Products

Large Production Capacity

FAQ

Q: What is the warranty period for your products? A: We offer a one-year warranty on all our products.

Q: Can you customize products according to our specifications? A: Yes, we provide OEM and ODM services to meet your specific requirements.

Q: Are your products compliant with international standards? A: Yes, our products meet all relevant international standards.

Q: What is the lead time for orders? A: The lead time depends on the quantity and customization requirements. Please contact us for more information.

Q: Do you provide technical support? A: Yes, we offer comprehensive technical support to our customers.

Packaging

Wooden Box Packaging

Carton Packaging

Foam-filled Packaging

Waterproof and Moisture-proof Packaging

Customized Packaging

International Standard Packaging

Logistics

Sea Freight

Air Freight

Land Transportation

Multimodal Transport

Express Delivery Services

Contact Us

Ready to take your electrical projects to the next level? Contact us today at ygvcb@hotmail.com to discuss your requirements and explore partnership opportunities with Shaanxi Yuguang Electric Co., Ltd. Let's create a brighter future together.