HLYF-40.5K photovoltaic grid connected cabinet

One, brief introduction

HLYF-40.5KV photovoltaic grid connected cabinet, is my company on basis of the introduction of foreign advanced technology, considering the situation of our country, as well as the requirements of various types of power users, their own development and design of products, with safe and reliable, the operation is convenient, fast and convenient installation, beautiful appearance, etc., Fu GB, IEC, DL standards, suitable for different types of power plants, substations, industrial and mining enterprises, such as tall buildings and places, especially suitable for frequent operation.

Two, goods manufacturing, inspection, acceptance of the implementation of the standard

IEC-298 high voltage metal enclosed switchgear and control equipment

IEC-56 AC high voltage circuit breaker

IEC-129 AC isolation switch and ground switch

IEC-185 current transformer

IEC-186 voltage transformer

IEC-99 AC non gap metal oxide surge arrester

GB156 standard voltage

GB191 packaging, storage and transportation signs

Insulation coordination GB311.1 high voltage transmission and distribution equipment

GB1207 voltage transformer

GB1208 current transformer

GB1984 AC high voltage circuit breaker

GB1985 AC high voltage circuit breaker and isolating switch

3.6~40.5kV GB3906 AC metal closed switch equipment and control equipment

GB4208 shell protection class

General technical specification for GB11022 high pressure closed equipment

Technical specification for GB14285 relay protection and safety automatic device

The condition of DL403 3~35kV indoor high voltage circuit breaker order

The condition of DL404 high-voltage switch cabinetordering

Technical specification for design of SDJ9 electrical measuring instruments

Three, the main technical specifications and characteristics

HLYF-40.5KV photovoltaic grid connected cabinet is our company on the basis of the introduction of foreign advanced technology, the development of new mid type switch cabinet, cabinet adopts imported aluminum zinc coated steel plate assembly and, it excludes the old switch cabinet cumbersome operation, to promote the launch laborious and not flexible ills, with the following advantages:

A. man machine interface

Product originality is the all clearly visible from the front panel,

It is conducive to the operator and quick operation without dangerous. From the front to the back design is convenient for operation, due to all operating systems can be found from the panel. The simplified design from the display and operation increases the reliability of the switch cabinet. Operation and operation of the circuit breaker is in the door closed, manual closing and tripping operation can be through the door key.

Operator can directly identify the location and status of circuit breaker. Position display device is directly fixed on the advancing mechanism to ensure absolute reliability. Regular product is the door open and close to closing, no display function, after the door is closed is not manually closing and tripping.

B. security (security cooperation between the circuit breaker and switch cabinet device)

(1) the circuit breaker is in working position, and the door is open. Only when the breaker is in the open position, the door can be closed, and the circuit breaker must be locked to push the working position from the test position.

Conventional products are to do this, the door opened and closed can push and pull out the circuit breaker, if when the doors opened, the circuit breaker is in working position, is precisely the fault current, then the consequences will be unimaginable.

(2) the circuit breaker compartment door using a lock, four high strength deduction, a move the door closed and locked. This on the circuit breaker chamber occurred internal fault (arcing test) is a strong preventive measures, absolutely not harm the human body.

Conventional circuit breaker chamber door use three or four screws are respectively tightened. If the staff do not pay attention to only tighten a screw, then once the internal fault arc can from the front out of harm to human and other equipment.

(3) breaker 6 root contact arm insert contact box, and contact box has two fan valve, when the circuit breaker is pulled out, valve can automatically shut down and forced locking to ensure the safety of maintenance personnel.

Conventional products are without locking and out of circuit breaker and switch from the interior of the valve can with the freedom of the human hand open, this is very dangerous, because the contact box is charged, this is unsafe factors.

(4) the product of the 6 contact box with an umbrella skirt, increase the distance to ensure that the distance from the KV/2cmR to climb up to the electrical distance of the requirements.

Conventional products in the original does not take an umbrella skirt, the distance is not enough to climb up the electricity can lead to a decline in insulation performance, such as large partial discharge index (currently some conventional products have been changed).

(5) the two increase of the plug and the propulsion mechanism of the lock up to achieve the following functions:

A. do not plug in the two plug, the circuit breaker room door can not be closed, the circuit breaker does not push;

B. work position two times the plug can not be pulled off;

C. off position does not pull out the two plug, the circuit breaker can not come out.

Conventional products in addition to the working position locking, locking is not. Often lead to pull out the plug pull switch, the results will be connected in the switch on the second line breaking, switch affects the normal use.

C. safe, flexible and convenient tool car

In view of the current domestic conventional products in the tools of the car is not safe, not flexible, inconvenient factors, the product specifically designed tool car. Truly a substation only a tool car purpose.

Pull out the position of the circuit breaker, if not the tool trolley inserted into the switch cabinet slide, the circuit breaker will not pull out, avoid the circuit breaker of conventional products in the test position does not install the tool car to pull out and broke the circuit breaker accident. The vehicle position can be adjusted, regardless of how wide can. To adjust to the appropriate location, truly a substation with a car to avoid large current conventional products, small current switch and PT, the mother of all alone with tool car trouble, but also saves cost. The tool trolley can lift up and down, not only the circuit breaker can be pulled out. The circuit breaker is placed on the ground, Taiwan for any position, to avoid the conventional products of a car can only put a circuit breaker to the circuit breaker placed ectopic, we need to add with a crane or forklift trouble, convenient maintenance.

D. reasonable device layout to the installation, maintenance brings great convenience

(1) change the conventional products level busbar glyph arrangement and connection of glyph bus to from the top of the cabinet to crawl in installation of the unreasonable structure, the bus is changed into a shaped arrangement, installation and maintenance as long as from behind open the upper part of the back door and pressure relief plate can be convenient for installation and maintenance.

(2) change the conventional current transformer installed in upright form, due to the cable connection is not high enough, installation and maintenance due to transformer barrier inconvenience and transformer vertical installation and an energy accumulating ash and other factors, but the transformer lifting in the posterior part of the contact box, neither ash deposition and improve the cable head height (up to 800mm), and easy to open the door of installation and maintenance.

(3) the lower part of the front of the cabinet can be installed PT (voltage transformer) car contact system to promote the use of thread to push through the method of the system.

E. reasonable structure design

(1) clear position and status display;

(2) all operations are carried out from the front of the cabinet;

(3) reasonable cooling natural wind tunnel;

(4) less insulation support;

(5) with anti internal combustion characteristics;

(6) there is an exhaust passage in the case of an internal combustion arc;

(7) completely mechanical safety locking;

(8) non insulated shield;

(9) each position has a switching contact output;

(10) the operation device and the position display device are all mechanical structure.

Introduction of structure type

F, handcart: hand car is by bending the steel plate after assembly, according to the function points for the breaker handcart, voltage transformer, arrester hand car, isolation handcart, transformer hand trolley, metering handcart, grounding handcart. Handcart and cabinet together design work, test, disconnect the three positions, hand car from the test position moved to the working position, hand car removed from the outside of the cabinet is special tool by hand car to achieve.

G, cabinets, the whole cabinet is made of high strength and high quality cold-rolled steel plate by bending pull rivet nut bolt connected and, CNC machining effectively assurance its accuracy, assembling and positioning is accurate, fast. The whole cabinet is metal separator separated into four independent cell: the busbar compartment, handcart room, cable room, instrument room, high-pressure compartment has pressure release channel, truck and bus, room, feed chamber is provided with metal valve.

The truck forward valve automatically open the valve automatically shut down after the car out of hand, ensure the safety of operating personnel.

H, grounding and grounding switch: switch cabinet is provided with a general earthing busbar and installation with my company to provide the ground row are connected into a whole after grounding, handcart shifted from open to working position are reliable grounding, cable maintenance room available earthing switch or pick hand car will to repair some of the head touch the ground.

To ensure the safety of maintenance personnel, grounding switch or grounding in the car are equipped with live display and interlocking device, only when the corresponding end of the charge is not charged, the switch can be pulled open operation.

I, a cable: switch cabinet in general, for the cabinet after the cable in and out, if the user needs, can also be in front of the cabinet to pass in and out, once, two times the cable after the installation of the sealing parts will be closed, the protection level is IP4X.

J, "five anti" device:

Switch cabinets usually set the following interlocking:

The circuit breaker has been fully engaged in the test / working position, the circuit breaker can be closed.

When the grounding switch is switched off, the vehicle can move from the test / disconnected position to the working position.

The truck is in the working position, grounding switch operation shaft is locked, earthing switch is not closed.

When the breaker is closed, the screw rod is locked and cannot move hand car.

Only when the grounding switch is closed, the cable compartment door can be arched to overhaul the cable.

Prevent into live space.

Circuit breaker in the working position, two times the plug can not be pulled off.

K, pressure relief devices: bus chamber, a cable chamber, above a handcart chamber are equipped with pressure relief device, when the internal arc fault circuit breaker or bus, accompanied by the emergence of arc, switch cabinet internal pressure increases, due to the loading in the special sealing ring to seal up the front of the cabinet.

The top pressure releases the metal plate automatically to the cabinet to open, release the pressure and discharge the gas, to ensure the safety of the operator and the switch cabinet.

L, and the bus system: through a three-way bus connector, between the cabinet main busbar, cabinet branch bus linked as a whole, to ensure that the connection is convenient, safe and reliable.

M, the cabinet adopts fully closed insulated busbar, reinforced insulation, meet all kinds of requirements and through condensation and pollution test.

N, each cabinet chain according to the requirements of a plan, the installation of electrical interlocking or mechanical procedures lock.

O, switch cabinet can be based on user needs, the installation of automatic humidity control and heating to the wet device.

P, can choose the comprehensive protection device, set control, protection, monitoring, communication as a whole, realize the intelligent switch cabinet.

Four, switch cabinet components technical parameters

1, circuit breaker

(1) model:

HLN58 (ZN85B) -40.5 integrated spring operation circuit breaker

(2) type: indoor integration

(3) rated voltage: 40.5kV

(4) rated current: 1250A/630A

(5) rated frequency: 50Hz

(6) rated short circuit breaking current: 31.5kA

(7) 3S thermal stable current: 80kA

(8) rated current (peak):80kA

(9) rated peak withstand current: 80kA

(10) rated withstand voltage (kV):

Power frequency: 95/118

Lightning strike: 185/215

(11) the time parameter:

Closing time: less than 95ms (2) = 55ms.

(12) rated operation sequence:

0-0.3S-CO-180S-CO.

(13) the operating mechanism type: spring operating mechanism (one with the circuit breaker).

(14 points), the closing coil rated voltage: DC220V.

(15) circuit breaker auxiliary switch: 4 normally open, 4 normally closed.

(16): more than 10000 mechanical life

(17): more than 5000 electrical life

2, current transformer

(1) model: LDJ-35Q

(2) structure: epoxy resin casting insulation

(3) in 1.2*40.5kV partial discharge measurement of voltage, relative to the amount of partial discharge is less than or equal to

20pC.

(4) the accuracy level: see a plan

(5) rated output capacity: 0.2S, 0.5 10P20; 30VA 20VA

(6) rated short-time withstand current and time: 25kA.

(7) rated dynamic stability current (peak):63kA.

3, voltage transformer

(1) model: arc suppression cabinet matching

(2) rated voltage ratio: arc suppression cabinet matching

(3) the connection category: the arc suppression cabinet matching

(4) the accuracy level: the matching of arc suppression cabinet

(5) rated output capacity: arc suppression cabinet matching

(6) the limit output capacity: the arc suppression cabinet matching

(7) rated insulation level: arc suppression cabinet matching

4, overvoltage absorber

(1) model: SHK-BOD-Z-35

(2) system rated voltage: 40.5kV

(3) lightning arrester rated voltage: 51kV

(4) the lightning arrester continuous operating voltage: 40.8kV

(5) nominal discharge current: 10kA

(6) the residual (1/3 steep shock S, 5kA): 154kV

(peak)

(7) lightning impulse residual voltage (=8/20 S, 5kA): 134kV (peak)

(8) the operation of the impact of residual pressure (30/100 S, 500A): 114kV (peak)

(9) 1mA DC reference voltage: 73kV

(10) Fang Bo impulse withstand current (2ms, 20):400A

(11) 0.75U1mA DC leakage current: less than or equal to 50 mu A5

Two, the 5 part

(1) computer integrated protection device (the device provided by the buyer) arranged in each high voltage switch cabinet is arranged on the upper part of the independent small room. All the buses through the access of air circuit breaker switch cabinet storage and control circuit and microcomputer automatic control device for power circuit.

(2) adopts multi stranded copper core plastic wire, current secondary loop is equal to or larger than 4 square mm; voltage secondary circuit is more than or equal to 2.5 square mm; the control circuit is equal or more than 1.5

Square millimetre.

(3) terminal block with copper Phoenix, meet the requirements and have connection number

15% spare terminals, terminal blocks and automatic control devices are located in the relay room, in order to facilitate wiring.

Five, factory test and data

1, the product factory before our company to carry out the factory test, and submit the test records, test items for:

(1) main circuit power frequency withstand voltage test

(2) the power frequency withstand voltage test of the auxiliary circuit and the control circuit

(3) measurement of the main circuit resistance

(4) mechanical properties and mechanical operation test

(5) connection standard test

(6) electric power operation test

(7) the protection measures and the inspection of the protection circuit

(8) the product has anti - internal arc accident of fire door structure, to ensure the safety of the personnel in the accident

2, technical information:

(1) the installation, use, maintenance and other full set of technical information

(2) to provide a high voltage cabinet once, two times the system schematic and related information

(3) to provide high pressure cabinet operating procedures and instructions

(4) the principles and instructions of the related accessories.

(5) to provide equipment quality certificate, product quality assurance, material inspection report

(6) the product factory certificate, the performance confirmation data