10 Example of scheme

KYN550

Indoor metal clad switchgear

1 Summary

1.1 Scope of application

KYN550 Indoor metal clad switchgear (hereinafter referred to as KYN550 switchgear) is the smallest size complete distribution equipment applied to 12kV three-phase AC 50Hz single busbar and single busbar segmented system. Equipped with the "five prevention" interlocking function of preventing loaded push-pull circuit breaker handcart, preventing accidental opening and closing of circuit breakers, preventing closing of circuit breakers when the earthing switch is in the closed position, preventing accidental entry into the live compartment, and preventing accidental closing of the earthing switch when live. Equipped with indoor medium voltage fixed sealed true air circuit breaker handcart, it is a high-performance distribution equipment.

KYN550 size design cabinet width is only 550mm, KYN550-12 compact miniaturized shape design for customers to save a lot of power distribution space, mainly used in commercial and industrial buildings, real estate, data centers and other industrial power grids with miniaturized demand for power transformation places.

1.2 Installation conditions

Normal service conditions

• Ambient air temperature: Upper limit+40C, lower limit -25C;

• Altitude: The maximum altitude of the equipment installation site is 1000m;

• Environment temperature: The daily average relative humidity shall not exceed 95%, and the monthly average relative humidity shall not exceed 90%;

• Earthquake intensity: not exceeding 8 degrees;

• The surrounding air should not be significantly polluted by corrosive or combustible gases, water vapor, etc.;

• There should be no severe pollution or frequent strong vibrations, and the severity design under harsh conditions should meet Class 1 requirements.

1.3 Product features and structure

The switchgear is composed of two main parts: a cabinet body and a central withdrawable component (i.e. a handcart). The cabinet is divided into four separate compartments, with an enclosure protection level of IP4X. When the doors of each compartment and circuit breaker room are opened, the protection level is IP2X. Equipped with overhead incoming and outgoing lines, cable incoming and outgoing lines, and other functional schemes, it can be arranged and combined to form various forms of power distribution devices. This switchgear can be installed, debugged, and maintained from the front, so it can be double arranged back to back and installed against the wall improving the safety and flexibility of the switchgear and reducing the floor area.

2 Model and meaning

3 Main technical parameters

4 Overall dimension diagram

GZDW

DC panel

1 Summary

1.1 Scope of application

Dc panel is used in large, small and medium-sized power plants and substations, providing DC power supply for high-voltage switch in normal operation and emergency state, relay protection, automatic control, accident lighting, etc. The reliability of DC panel can not be replaced by other power supply devices. It can meet the high reliability requirements of power supply in substation and power plant.

This series of DC panel is small size, high efficiency, superior technical indicators, modular design, n+1 redundancy heat backup, high reliability, the module adopts the world's leading "resonant voltage type double circuit control resonant switching power supply technology", "four remote" function, equipped with standard RS-485 and RS232 interface easy to connect with the automation system. And other performance is superior to the absolute advantage of traditional power and accepted by the majority of users. This product conforms to: GB/T19826-2005 "Electric power Engineering DC power equipment general technical conditions and safety requirements"; JB/T5777.4-2000 "Power System DC power equipment general technical conditions and Safety requirements"; JB/T8456-1996 "Low-voltage DC Switchgear set"; DL/T459-2000 "Power System DC Power cabinet ordering Technical Conditions"; DL/T5041-95 Technical Regulations for the Design of Communications in Thermal Power Plants

1.2 Installation conditions

Altitude: ≤ 2000m;

Environment temperature: Not lower than -15 C, not higher than+40 C,

storage environment temperature is -40 { } ^ { \circ } { { C } } ~ + 6 0 { } ^ { \circ } { { C } } :

Maximum relative humidity: not exceeding 90% (Environment temperature 25 C);

The operating location is free of conductive dust, corrosive and insulating gas or vapors. When used indoors, avoid direct sunlight.

Special usage situations that do not meet the above conditions should be raised when placing an order to ensure that this product can work reliably

2 Model and meaning

3 Main technical parameters

• AC input

Voltage: three-phase AC 380V ± 20% Frequency: 50 Hz±2%

• DC output

Voltage output: 110V or 220V

• Stable voltage accuracy: ±0.5%

• Stable current accuracy: ±1%

• Ripple coefficient: ≤ 0.5%

• Parallel uneven flow rate: ±3%

Controlbusbar:5A、8A、10A、12A、15A、20A、30A、40A、50A、80A、100A

Closingbusbar:120A、240A、480A、720A.

• Battery capacity

Leadacidbattery:7AH、17AH、40AH、65AH、100AH、200AH、300AH、400AH、500AH、600AH、800AH、1000AH、1500AH、2000AH、3000AH.

Nickelseparated battery:10AH、20AH、40AH、65AH、100AH、200AH、300AH、400AH、500AH.

• Protection level: IP30

• Input power factor: ≥ 0.93

• Charging efficiency: ≥ 95%

• Maximum audible noise (dB): ≤ 40

• Insulation strength: AC 2500V/1min

4 Overall dimension diagram

5 System Features

Intelligent dual power switching

Two AC power inputs, one of which is the working power supply and the other is the backup power supply. When the working power supply fails, the system automatically switches to the backup power supply

Fully automatic depressurization

Automatically switch according to the bus voltage, using stepless or stepless voltage reduction devices, ensuring stable and reliable operation.

Centralized monitoring function

The central monitor plays a role in coordinating or controlling the operating parameters and status of various components of the DC power supply, while centralizing the parameters of each module to transmit to the upper computer and forwarding commands issued by the upper computer. Adopting a modular structural design, it can monitor the voltage and current of two input AC power supplies, and automatically switch on and off for mutual backup; Coordinate or control the current and voltage parameters of the control and combination buses; Battery voltage parameters; Battery charging and discharging current parameters; Unified insulation parameters; Monitor the working status of the closing switch, control switch, and battery fuse; Feedback circuit insulation monitoring (optional) Battery inspection (optional); Monitor the ambient temperature.

Multiple protection design

Using surge protectors to prevent input power overvoltage; Adopting output overvoltage protection; Output current limiting protection; Short circuit protection; Module parallel protection; Over temperature protection and over current protection can improve the safe and reliable operation of the entire system.

Temperature compensation

According to the parameters provided by the battery manufacturer, select the battery temperature compensation center and temperature compensation coefficient to automatically adjust the battery float charging voltage to meet the battery charging requirements

Alarm function

Through parameter setting, various alarm functions are realized. Including: over-voltage of control bus, over-voltage of battery pack, abnormal insulation and output switch state

N+1 redundancy design

By increasing or decreasing the number and capacity specifications of power supply modules, any combination of cabinet (screen) output configurations can be achieved. To adapt to different battery capacities, ranging from 10Ah to 3000Ah. At the same time, due to the n+1 redundancy design of the module, while expanding the rack capacity, it achieves n+1 redundancy configuration, and can also implement 1+1 backup when the capacity is small.

Communication function

By selecting the interface, switch between the two communication protocols of CDT and MODBUS. It has two communication interfaces, RS-485 and RS-232, which can facilitate remote control and achieve the "four remote" function.

Battery maintenance free

Adopting a maintenance free valve controlled sealed lead-acid battery, it operates reliably and does not require adding acid or water. The intelligent controller can automatically switch between equalizing and floating charging of the battery according to preset settings.

XGN15-12

Fixed type metal ring main switchgear

1 Summary

1.1 Scope of application

XGN15-12 Fixed type metal ring main switchgear is a new generation of metal enclosed switchgear that uses SF6 load switches as switches and uses air insulation throughout the cabinet. It is suitable for distribution automation and is compact and expandable. It has the features of high-end, miniaturization, full parameters, low price, and less maintenance.

This product has a "closing-opening-earthing" three position arc extinguishing chamber, equipped with a "five prevention" function (to prevent loaded opening and closing of the main switch; to prevent accidental entry into the live space; to prevent accidental opening and closing of the main switch; to prevent live hanging of the earthing wire; to prevent the earthing switch from transmitting power in the earthing position), reliable interlocking, high insulation strength of the fracture, large creepage distance design, and the outgoing end is protected by a pressure equalizing cover, with a special dynamic sealing and fixed sealing design, Combined with advanced technical performance and lightweight and flexible assembly solutions, it can fully meet the constantly changing requirements of the market and is a new generation of high-voltage switchgear equipped in urban power grids. ABB's original SFG SF6 load switch or Schneider's original SM6 load switch can also be installed according to user needs. Or install an imported vacuum circuit breaker VD4 switch.

This product is suitable for three-phase AC 10kV, 50Hz power systems, and is used in industrial and mining enterprises, high-rise buildings, residential communities, prefabricated substations, and other places to disconnect and close load currents, fault currents, control and protect lines and distribution transformers.

1.2 Arc extinguishing principle of load switch

SF6 gas has good arc extinguishing performance. In order to quickly extinguish the arc, the switch generates an arc when the moving and stationary contacts are just separated during the current interruption process. At this time, due to the magnetic field effect of the permanent magnet, the arc is driven to move quickly, causing it to elongate and continuously combine with SF6 gas to quickly dissociate and cool. When the current exceeds zero, it extinguishes. The double fracture opening distance has the insulation level of the isolation fracture. The permanent magnet arc rotation principle has small operating power, strong arc extinguishing ability, light contact burns, and extended electrical life.

1.3 Environmental conditions for use

Altitude: Not exceeding 1000M; (If there are special requirements, please indicate them when ordering) Environment temperature: -15℃ +40℃;

Relative humidity: The daily average relative humidity shall not exceed 95%, and the monthly average relative humidity shall not exceed 90%;

Seismic strength: No more than 8 degrees;

There is no pollution in the surrounding air, such as dust, smoke, chemical preservatives, flammable gases, gasoline, salt agents and so on.

2 Model and meaning

3 Main technical parameters

The GT-FLN (36.48) -12D SF6 three position load switch is a multifunctional medium voltage switchgear that integrates closing, opening, and earthing. It is filled with 0.05MPa SF6 gas in a fully sealed epoxy resin enclosure with a reinforced structure, and achieves the above three functions with the least number of components, thus ensuring product quality and improving reliability. The equipment is maintenance free and can safely operate for over 20 years under normal conditions.

Due to the independent manual or electric operating mechanism of the switch for closing and breaking the main circuit, the opening and closing speed of the switch is determined by the spring and is independent of the manual speed. After installing electric mechanisms and microcomputer measurement and control devices, telemetry, remote signaling, and remote adjustment can be achieved, providing necessary conditions for power grid automation.

① More than five years of safe operation experience in China

② Excellent technical performance, long electrical life, and maintenance free.

③ The combination closing, opening, and earthing switch are integrated and packAged in an epoxy resin enclosure filled with SF6 gas. They are interlocked in three positions, with a compact structure and high safety and reliability. ④Small size, light weight, easy maintenance, convenient and safe operation.

GT-FLN36-12/630-20 II type SF6 load switch

Upper unit
GT-FLN48-12/630-20 Ⅲ type SF6 load switch

2 or 3 station load switch
Operating mechanism with a
mechanical position indicator
Busbar compartment enclosure
Integrated low-voltage chamber
Interlocking device
Busbar

4 XGN15-12 Cabinet Structure

4.1 Main technical parameters

Control cable tray
Upper unit
Upper unit

GT-FLN36-12 (IIl load switch)<br>GT-FLN48-12 (III load switch)

Enclosure
Transformer
Earthing device
Sensing display device
Fuse release device
Cable flooring with cable supports

5 Primary wire scheme

Cable lifting cabinet (Width 375mm)

Incoming cabinet (Manual or electric) (Width 500mm)

Incoming cabinet (Manual or electric) (Width 375mm with transformer 500mm)

Cable distribution box (Width 375mm)

Incoming/outgoing cabinets (Width 500mm)

Contact cabinet (Manual or electric) (Width 500mm)

Outgoing cabinet (Manual or electric) (Width 375mm with transformer 500mm)

Measuring cabinet (Width 750mm)

Incoming/outgoing cabinets (Circuit breaker width 800mm)

6 External installation dimensions of ring main unit

HXGN-12

Fixed type metal ring main switchgear

1 Summary

1.1 Scope of application

HXGN -12 Fixed type metal ring main switchgear (hereinafter referred to as ring main unit) is a new type of highvoltage switchgear produced for the renovation and construction of urban power grids. In the power supply system, the ring main unit is used for breaking load current and making short-circuit current. It is suitable for AC 12kV, 50Hz distribution network systems, and is widely used in urban power grid construction and renovation projects, industrial and mining enterprises, high-rise buildings, and public facilities. As a ring main power supply unit and termina equipment, it plays a role in energy distribution, control, and protection of electrical equipment. It can also be installed in box substations. This ring main unit is equipped with a compressed air load switch and a vacuum load switch. The operating mechanism is a spring operated mechanism, which can be operated manually or electrically. Alternatively, it can be equipped with isolation switches and VS1 fixed circuit breakers. This ring main unit has strong integrity, small size, no fire and explosion hazards, and reliable "five prevention" functions.

1.2 Environmental conditions for use

Altitude: ≤ 1000m;

Environment temperature: The upper limit of the ambient air temperature is+40C, and the lower limit is -15C; Relative humidity: The daily average value shall not exceed 95%, and the monthly average value shall not exceed 90%; Installation site: A place without conductive dust, corrosive gases, and water vapor; Places without fire and explosion hazards; Places without frequent severe vibration.

Note: When the normal usage conditions mentioned above cannot meet the usage requirements, the user shall negotiate with the manufacturer.

1.3 Structural features

The ring main unit is equipped with FZRN25-12D switch, FKRN12A-12D switch, GN30-12 switch, and VS1 fixed circuit breaker.

The load switch, isolation switch, VS1 circuit breaker, and cabinet door have complete and reliable mechanical linkAge and interlocking devices, which can effectively prevent misoperation and ensure safe maintenance

The switch can be manually and electrically operated.

The cabinet door and instrument door of measurement cabinet are equipped with lead sealing pins.

The fuse combination electrical cabinet and fuse tube are equipped with striker pins. In the case of a short circuit, the striker impacts the tripping mechanism, achieving fast switching and effectively protecting electrical equipment; The ring main unit adopts front operation and reliable wall installation.

Power transmission operation: Only when the cabinet door is closed and locked, and the earthing switch is operated to the "open" position, that can the load switch be operated to the closed position

Power outage operation: The earthing switch can only be closed when the load switch is in the opening position, and the cabinet door can only be opened when the earthing switch is in the closing position.

The isolation knife is reliably interlocked with the circuit breaker and is interlocked with the door, fully meeting the five prevention requirements.

2 Model and meaning

3 Main technical parameters

Scheme No.

19

20

21

22

23

24liaison

Circuit name

liaison

liaison

liaison

liaison

liaison

Primary wiring scheme

18848H1 48

Cabinet size

W* D*H (mm)

W

650~1000

650~1000

650~1000

650~1000

800~1000

650~1000

D

900

950

1000

900

950

1000

900

950

1000

900

950

1000

900

950

1000

900

950

1000

H

1900

2000

2200

1900

2000

2200

1900

2000

2200

1900

2000

2200

1900

2000

2200

1900

2000

2200

Dimension remarks

Width size 50 gears

Main electrical components

Vacuum loadswitch

FZN25-12/T630-20

FZRN25-12D/T200-31.5

FZN25-12/T630-20

FZRN25-12D/T200-31.5

FZN25-12/T630-20

FZN25-12/T630-20

Compressorload switch

Optional

FKN12A-12/T630-20

FKRN12A-12D/T125-31.5

FKN12A-12/T630-20

FKRN12A-12D/T125-31.5

FKN12A-12/T630-20

FKN12A-12/T630-20

Current transformer

LZZBJ9-10

LZZBJ9-10

LZZBJ9-10

Voltage transformer

JDZ(X)10-10

JDZ(X)10-10

High voltage fuse

XRNP-12/0.5A

XRNP-12/0.5A

Lightning arrester

HY5WS-17/50

HY5WS-17/50

HY5WS-17/50

HY5WS-17/50

HY5WS-17/50

HY5WS-17/50

Charged display

DXN-10Q/T(Q)

DXN-10Q/T(Q)

DXN-10Q/T(Q)

DXN-10Q/T(Q)

DXN-10Q/T(Q)

DXN-10Q/T(Q)

Remarks

When installing the load switch, the minimum cabinet width is 950mm

5 Ordering instructions

① Provide primary system diagram and layout plan;

② Provide the models and specifications of the main components inside the switchgear;

③ When ordering, if there are no other special requirements from the user, they will supply according to the standards of Jubang Group.

Standardized low voltage switchgear

1 Summary

1.1 Scope of application

SLVA Standardized low voltage switchgear is a modular component assembled modular withdrawable low-voltage switchgear. Widely used in power plants, substations, petrochemical industry, steel smelting and rolling, light industry and textile, residential communities, high-rise buildings and other places. Used as the power, distribution, motor control center, capacitor compensation, and other energy conversion, distribution, and control for low-voltage distribution systems with an AC frequency of 50-60Hz and a rated working voltage of 400V and below.

1.2 Installation conditions

Altitude: ≤ 2000m;

Air temperature: The upper limit of the surrounding air temperature is+40 C, and the lower limit is -5C . The daily average temperature shall not exceed+35℃;

System standard voltage: 230V/400V

Rated insulation voltage: 690V for the entire cabinet

Overvoltage category: IV

Earthing system: direct earthing (TN)

Rated frequency: 50Hz

Pollution level: Level 3

Installation location: indoor

EMC environment: Class A environment

1.3 Structural features

The standardized design of low-voltage switchgear mainly reflects: unified structural scheme, refined main busbar current specifications, unified cabinet merging requirements, unified primary and secondary cable interfaces, civi engineering interfaces, and other configurations inside the cabinet.

2 Model and meaning

a) SLVA low-voltage switchgear product models are divided into single cabinet product models and combination cabinet product models. Among them, the combination cabinet product model is mainly used for the combination scheme of type tests and network access special test prototypes;

b) The single cabinet product model consists of the product name code, horizontal busbar rated current, standardized customized solution single cabinet number, compensation capacity/compact structure identification (if with), where the compact type is identified with "C". The model composition of a single cabinet product is shown in Figure 4-1;

c) The product model of the combination cabinet consists of the product name code, horizontal busbar rated current, standardized customized scheme single cabinet number, and compact structure identification (if with). The composition of the combination cabinet product model is shown in Figure 4-2.

Figure 4-1 Composition of SLVA low voltage switchgear single cabinet product models

Figure 4-2 Model composition of SLVA low-voltage switchgear combination cabinet

3 Main technical parameters

3.1 Low voltage complete switchgear SLVA-2500/Z001

Main busbar:InA=2500A、2000A,Icw=65kA;
Distribution busbar of feeder cabinet: Inc=1600A,Icw=50kA;
Control cabinet distribution busbar: Inc=1600A,Icw=50kA;
Ue=400V, Ui=1000V (incoming cabinet, feeder cabinet)/690V (control cabinet)
50Hz;
Protection level: enclosure IP4X, ventilation hole IP30XD, cabinet top IP3X, indoor type; Arc level: B
GB/T 7251.12-2013;GB/T 7251.8-2005;GB/T 18859-2016

3.2 Low voltage complete switchgear SLVA-1250/Z001

Main busbar:InA=1250A,Icw=35kA;
Distribution busbar of feeder cabinet: Inc=1250A,Icw=35kA;
Control cabinet distribution busbar:Inc=1250A,Icw=35kA;
Ue=400V,
Ui=1000V (incoming cabinet, feeder cabinet)/690V (control cabinet)
50Hz;
Protection level: enclosure IP4X, ventilation hole IP30XD, cabinet top IP3X, indoor type; GB/T 7251.12-2013;GB/T 7251.8-2005

3.3 Low voltage complete set reactive power compensation device SLVA-2500/07-300/60

Horizontal busbar:InA=2500A、2000A,Icw=65kA;
Rated current of busbar: In=(349.8A\~ 68.4A)+86.6A(SVG),Icw=15kA;
Ue=400V, Ui=690V;
(300kvar\~60kvar) +60kVA (SVG), single-phase, three-phase + SVG hybrid compensation;
50Hz;

Protection level: enclosure IP4X, ventilation hole IP30XD, cabinet top IP3X, indoor type; Type of component controlling the switching of capacitors: composite switch; With harmonic suppression function GB/T 15576-2008;GB/T 7251.12-2013;GB/T 7251.8-2005

3.4Low voltage complete set reactive power compensation device SLVA-2500/08-360

Horizontal busbar: InA=2500A、2000A,Icw=65kA;
Rated current of busbar: In=420.8A\~ 68.4A,Icw=15kA;
Ue=400V,Ui=690V;
360kvar\~60kvar, single-phase and three-phase combined compensation;
50Hz;
Protection level: enclosure IP4X, ventilation hole IP30XD, cabinet top IP3X, indoor type; Component type for controlling the switching of capacitors: composite switch
GB/T 15576-2008;GB/T7251.12-2013;GB/T 7251.8-2005

4 Installation, use, and maintenance

When the product is delivered to the destination, the packing box should be checked first. If not installed immediately, it should be stored in a dry cleaning place. The product is recommended for installation off the wall, and the installation foundation plane should be flat. The horizontal error of the foundation channel steel is 1 / 1000, and the total length deviation is ± 3mm. After the product is in place, first check whether each product is perpendicular to the ground, otherwise it is allowed to correct the pad. Then the whole arranged bottom frame is connected with the connecting plate, the arranged screw is installed, and then welded with the foundation groove steel. Grade 8.8 is recommended with pressure washer. After connecting the cable, the bottom of the product is closed to prevent small animals from climbing into the cabinet and causing short circuit accidents.

And before being put into operation, the following inspections and tests need to be carried out:

① Check whether the surface covering material (such as spray molding) of the cabinet is damaged, and whether the cabinet is dry and tidy.

② Check if there are any foreign objects placed inside the cabinet (such as bolts, welding rods, etc.), and check if each bolt is tightened for looseness or leakAge.

③ Check whether the operating mechanism is flexible, whether there is any jamming or collision in the drawer extraction and insertion, whether the mechanism interlocking is reliable, and whether the action is accurate

Check whether the setting current value of the switch, the scale of the instrument, the changes and polarity of the transformer meet the requirements

⑤Measure the insulation resistance value of the main circuit and control circuit with a 1000V megohmmeter, which should not be less than 1 megohm.

⑥The temporary power supply should be used for trial power supply, and the electric closing, opening, and all indicated values should be accurate

Precautions for use

① The SLVA series cabinets are low-voltage distribution cabinets that are not installed against walls, operated from the front, and maintained on both sides. The maintenance channels and doors of the cabinet must be qualified professionals who have passed the assessment before entering or opening them for operation, inspection, and maintenance.

② After multiple opening and closing of air circuit breakers and molded case switches, especially after short circuit opening and closing, local contact burns and the generation of carbon substances can increase contact resistance. Maintenance and repair should be carried out according to the circuit breaker user manual.

③After installation or repair, it is necessary to strictly check the isolation status between each isolation unit and functional units to ensure good functional separation of this device and prevent the expansion of faults.

5 Product completeness

The switchgear is accompanied by a packing list, product qualification certificate, product user manual, factory test report, primary system diagram, control schematic diagram, secondary wiring diagram, cabinet door key, operating handle, and spare parts provided according to the supporting list

6 Ordering instructions

When placing an order, the customer should provide the following information

① Main circuit scheme (or main wiring system diagram) and electrical component list.

②Distribution cabinet arrangement and layout plan.

③Drawer unit arrangement diagram and number of spare drawer units.

④Auxiliary circuit electrical schematic diagram (if there are no special requirements from the user, please follow our factory's standard scheme diagram).

⑤Product surface color

⑥The incoming and outgoing forms, interface requirements, and any special arrangement and usage conditions of the switchgear in the distribution room.

GGD

AC low-voltage power distribution cabinet

1 Summary

1.1 Scope of application

GGD AC low-voltage power distribution cabinet is suitable for power plants, substations, industrial and mining enterprises and other power users in distribution systems with AC 50Hz, rated working voltage of 400V, and rated working current of 4000A. It is used for power conversion, distribution, and control of power, lighting, and distribution equipment. The product has the features of high breaking capacity, good dynamic and thermal stability, flexible electrical schemes, convenient combination, strong practicality, novel structure, and high protection level. It can be used as a replacement product for low-voltage switchgear

1.2 Installation conditions

Altitude: ≤ 2000m;

Environment temperature: The upper limit of the ambient air temperature is+40 C, and the lower limit is -5C. The average temperature within 24 hours shallnot exceed+35℃;

Relative humidity: The relative humidity of the surrounding air shall not exceed 50% at a maximum temperature of+40C, and a relatively high relative humidity is allowed at lower temperatures. (For example, 90% at+20℃) should consider the possibility of occasional condensation due to temperature changes;

Installation site: The inclination between the equipment and the vertical plane during installation shall not exceed 5%. The equipment should be installed in a place without severe vibration and impact, as well as in a place that is insufficient to cause corrosion of electrical components.

Note: When the normal usage conditions mentioned above cannot meet the usage requirements, the user shall negotiate with the manufacturer.

2 Model and meaning

3 Electrical performance

3.2 Main circuit scheme

The main circuit scheme has been selected based on the opinions of a wide range of design and user departments, and has added the necessary schemes for power plants. Increasing the rated current to 3150A is suitable for distribution transformers of 2000kA and below

In addition, GGJ1 and GGJ2 capacitor compensation cabinets have been designed to meet the needs of reactive power compensation, with 4 main circuit schemes and a total of 12 specifications.

3.3 Auxiliary circuit scheme

The design of auxiliary circuit is divided into two parts: power supply scheme and power plant scheme. There is enough space in GGD cabinet to install secondary components.

3.5 Selection of electrical components

① The GGD cabinet mainly adopts advanced electrical components that can be mass-produced in China, such as ME, DW15, etc. At the same time, according to the principles of economy and rationality, some available old products such as DZ20 are retained while fully considering feasibility. Do not use outdated products

② The HD13BX and HS13BX rotary operated knife switches are specialized components designed to meet the unique structural needs of the GGD cabinet. They change the operating mode of the mechanism and retain the advantages of old products, making them a practical new type of electrical component.

③When the design department selects new types of electrical components with better performance and more advanced technology based on user needs, the GGD cabinet has good installation flexibility and generally does not cause manufacturing and installation difficulties due to updating electrical components.

④ To further improve the dynamic stability capability of the main circuit, ZMJ combination type busbar clamps and insulation support components dedicated to GGD cabinets are equipped. The busbar clamp is made of high-strength and flame-retardant PPO alloy material thermoplastic forming, with high insulation strength, good self-extinguishing performance, and unique structure. It can be easily combined into a single busbar clamp or a double busbar clamp by adjusting the building block. The insulation support adopts a sleeve type molded structure, which has low cost and high strength, solving the problem of insufficient creepage distance in old products.

4 Structure Introduction

The GGD AC low-voltage power distribution cabinet adopts the form of a universal cabinet, and the framework is assembled with C-shaped profiles. The framework parts and special supporting parts are supplied by a designated steel production factory to ensure the accuracy and quality of the cabinet. The components of the universal cabinet are designed according to the modular principle and have 20 mold mounting holes

The high universal coefficient can enable factories to achieve pre-production, which not only shortens the production cycle but also improves work efficiency.

The GGD cabinet design fully considers the heat dissipation issue during the operation of the cabinet. There are different numbers of heat dissipation slots at both ends of the cabinet. When the electrical components inside the cabinet heat up, the heat rises and is discharged through the upper slot. Cold air is continuously replenished into the cabinet through the lower slot, forming a natural air duct from bottom to top for heat dissipation.

The GGD cabinet is designed according to the requirements of modern industrial product design, using the golden ratio method to design the appearance of the cabinet and the segmentation dimensions of each part, making the entire cabinet beautiful and elegant, giving it a new look.

The cabinet door is connected to the frame with a rotating hinge, which is convenient for installation and disassembly. A mountain shaped rubber strip is embedded at the folding edge of the door. When closing the door, the strip between the door and the frame has a certain compression stroke, which can prevent direct collision between the door and the cabinet body and also improve the protection level of the door.

Instrument doors equipped with electrical components are often connected to the frame using flexible copper wires and the installation components inside the cabinet are connected to the cabinet frame with knurled screws, forming a complete earthing protection circuit for the entire cabinet

The surface of the cabinet adopts spray molding, with strong adhesion and good texture. The whole cabinet is in a matte color tone, avoiding dazzling effects and creating a comfortable visual environment for the duty personnel.

The top cover of the cabinet can be removed when needed to facilitate the assembly and adjustment of the main busbar on site. The four corners of the top cabinet are equipped with lifting rings for lifting and shipping.

The protection level of the cabinet is IP30, and users can also choose between IP20 and IP40 according to the requirements of the usage environment.

5 Installation and use

After the product arrives at the receiving location, the first step is to check whether the packAging is intact and undamaged. If with problems are found, relevant departments should be notified in a timely manner to find the cause. For products that are not installed immediately, they should be specified according to normal usage conditions and appropriate locations.

Product installation

The installation of the product should follow the installation diagram (see Figure 2). The foundation channel steel and bolts should be provided by the user. When installing the main busbar, the overlapping surface should be repaired flat, cleaned, coated with neutral petroleum jelly or other measures should be taken, and then the bolts should be tightened.

After installation, the product needs to undergo the following inspections and tests before being put into operation.

① Check if the cabinet surface paint has fallen off and if the cabinet is dry and clean.

② Check whether the operating mechanism of electrical components is flexible and there should be no jamming or excessive operating force.

③Check whether the main electrical components are reliable and accurate, and whether the auxiliary contacts are reliable and accurate

④ Is the ratio and polarity of the instrument indication to the transformer correct.

⑤Whether the busbar connection is good, and whether the insulation support components, installation components, and accessories are securely and reliably installed.

⑥Whether the auxiliary contacts meet the requirements, whether the specifications of the fuse core are correct, whether the setting value of the relay meets the design requirements, and whether the action is accurate

⑦ Does the contact point of the circuit meet the requirements of the electrical schematic.

⑧ Whether the protection circuit system meets the requirements.

The insulation resistance measured with a 500volt megohmmeter should not be less than 10 megohms.

Precautions for use

① This product is not installed against a wall, operates on one side (front), and repairs low-voltage distribution cabinets with double-sided doors. The maintenance channels and cabinet doors of the product must be accessed or opened by qualified professionals for operation, inspection, and maintenance.

②Air circuit breakers, after multiple opening and closing, can cause localized burns and the generation of carbon substances on the contacts, resulting in an increase in contact resistance. Regular maintenance and repair of the air circuit breaker should be carried out according to its user manual.

6 Product completeness

The manufacturer shall provide the following documents and attachments when supplying the goods ① Packing list

② Product certificate of conformity (Certificate of conformity or factory test report)

③Instruction manual

④Relevant electrical drawings

⑤ Cabinet door keys, operating handles, and spare parts specified in the contract.

7 Ordering instructions

When placing an order, the customer should provide the following information:

① Full model of the product (including main circuit scheme number and auxiliary circuit scheme number)

②Sequence diagram of main circuit system combination

③Electrical schematic diagram of auxiliary circuit

④List of components inside the cabinet

⑤Other special requirements that do not meet the normal usage conditions of the product will be separately agreed upon.

8 Installation dimensions