Low Voltage Fixed Switchgear GGD
GGD type low voltage fixed switchgear is suitable for three-phase AC 50/60HZ, max voltage AC 690V, rated current to 3150A power distribution system , it is widely used in power plants, substations, industrial and mining enterprises etc energy consumer and using for power, lighting ,control motor starting and distribution equipment for electrical energy conversion, distribution and control purposes.
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  • Switchgear Structure Characteristic
  • SWITCHGEAR INSTALLATION

Product description

  • GGD type LV low voltage distribution cabinet is based on the higher charge of energy department  and the power consumers and design department requirements , the principle of safety, economy, reasonable, reliable design of new type low-voltage distribution cabinet . The products with high breaking capacity, dynamic thermal stability, electrical flexible, convenient combination, a series of practical., novel structure, high protection level, which can be used as a replacement of low voltage switchgear.GGD AC low voltage distribution cabinet is accords with the standards IEC60439 Low voltage complete switch device and Control Equipment etc.

Service Conditions

  • 1.Ambient air temperature: -30℃~+50℃ and the average temperature should not exceed +50℃ in 24h
    2.Indoor altitude above sea level: Maximum installation altitude: 2500m
    3.Relative humidity should not exceed 50% at max temperature +40℃. Higher relative humidity is allowed at lower temperature. Ex. 90% at +20℃. But in view of the temperature change, it is possible that moderate dews will produce casually.
    4.No fire, explosion danger, serious pollution, chemical corrosion and severe vibration
    5.Installation gradient not exceed 5°
    6.The equipment shall be installed in a place where there is no violent vibration and impact, and the place where the electrical components are not corroded.
    7.Any specific requirement, consult with manufacture

Product model and meaning

Electrical properties

1.Basic electrical parameters

Type

Rated voltage (V)

Rate current (A)

Rated short circuit break current (kA)

Rated short time  withstand current(1s) (kA)

Rated peak withstand current(1s) (kA)

GGD1

400(690)

A   1000

15

15

30

B   600(630)

C   400

GGD2

400(690)

A   1500(1600)

30

30

63

B   1000

C   600

GGD3

400(690)

A   3150

50

50

105

B   2500

C   2000

2. Main circuit scheme
The main circuit of the GGD cabinet is designed with 129 schemes, which have 298 specifications (excluding the function of the auxiliary circuit and the change of the control voltage

Among :

GGD1 type

49 schemes

123 specifications

GGD2 type

53 schemes

107 specifications

GGD3 type

27 schemes

68 specifications

The main circuit scheme is for the design, use departments suggestions to select, increasing the power plant needs. Rated current to 3150A, suitable for 2000kVA and below distribution transformer selection. In addition, in order to meet the needs of the reactive power compensation designing of GGJ 1, GGJ2 capacitor compensation cabinet, its main circuit 4 schemes. a total of 12 specifications.

3. Auxiliary circuit scheme
The design of auxiliary circuit is divided into two parts: power supply scheme and power plant project, GGD cabinet will have enough space to install the secondary components, while NLS has developed special LMZ3D type current transformer to meet power plant and special user with relay protection needs.

4.Main bus
Considering the feasibility on price ratio and aluminum replacing copper , the rated current in 1500A and below, it can be used in single row aluminum busbar, rated current is greater than 1500A ,adopting double copper busbar, manufacturer is according to the provisions to produce prototype and passed the type test, of course, the production plant can also be based on user requirements to replace aluminum busbar to change the same carrying capacity of copper bus bar .
The lap surface of busbar are used soldering process

5. Selection of electrical components
(1).The GGD cabinet mainly adopts advanced electrical components , but also according to the economic and reasonable principle, retain some of the available old DZ20 in full consideration of the feasibility of the premise, such as BRM1, do not use obsolete products.
(2). HD13BX and HS13BX type rotating operation type switch is a special element NLS designed to meet the needs of GGD cabinet unique structure, it has changed the mode of operation mechanism, retain the advantages of the old products to be a practical new type of electrical components.
(3).As the design department according to user needs, with more excellent performance, new electrical components, more advanced technology, because the GGD cabinet installation flexibility good, generally will not cause the difficulty of manufacturing and installation of the update for the electrical components.
(4). norder to further improve the dynamic stability of the main circuit, NLS designed the ZMJ type bus GGD cabinet special clamp and insulating support parts. Bus clamp is made of high strength, high flame retardant Pp0 alloy material, thermoplastic molding, high insulating strength, self extinguishing performance, unique structure, only need to adjust the block between the block easily combined into a single or double busbar busbar clamp clamp, insulating support sleeve is molded structure, low cost, high strength, the old product creepage distance is not defective.

Structure characteristics

  • 1.GGD AC low voltage distribution cabinet cabinet with universal cabinet form frame of 8MF or C type cold-formed steel by local welding assembly, frame parts and special parts by steel production plant sentinel supporting supply, to ensure the accuracy and quality of the cabinet. The cabinet general principle of 2 parts according to the module 0 module, which is provided with a mounting hole. The general coefficient is high, can make the factory implementation of pre production, which can shorten the manufacturing cycle, but also improve work efficiency.

  • 2. The GGD cabinet is designed to take full account of the heat problem in the operation of the cabinet in the cabinet. The upper and lower ends are different number of radiating slots, hot air rises when the cabinet electric heating element, and discharged through the top slot, and the cold wind constantly from the bottom slot supplemented cabinet, the cabinet body bottom sealed to form a natural ventilation and to achieve the aim of heat radiation.

  • 3 .The GGD cabinet according to the modern industrial product shape design, using the golden ratio design method of the cabinet body and cut size of each part, the entire cabinet appearance, new look.

  • 4.The door hinge and frame shaft movably connected with the installation, convenient disassembly, are a mountain type rubber block the hem of the door, when the door between the door and the frame of the molding a compression stroke, and the cabinet door can prevent direct collision, also improve the level of protection of the door.

  • 5. Equipped with the electrical components of the instrument door with many baling wires connected to a frame, mounting cabinet with frame with knurling screw fastening, the entire cabinet form a complete grounding protection system.

  • 6. The selection of orange shaped Polyester Topcoat Paint, with strong adhesion, good texture, the entire cabinet is sub light tone, avoid glare effect, to the personnel on duty to create a more comfortable visual environment.

  • 7.The cover can be removed during installation and adjustment for field bus, on top of the cabinet with four angle rings, used for lifting and loading.

    8. Cabinet protection grade is IP41.

Installation and use

  • The product reaches destination, at first, they should check whether the packaging is intact, once they found the problem , they should be timely notify the relevant departments to do business contract records and analysis cause , prepare visa and deal with sales after. For the product not immediately install,they should be based on the conditions of normal use and electrical equipment for temporary custody at appropriate places for safe keeping.

  • 1. The product should be installed according to the installation diagram (see Figure2). Adopting bolt to be fixed and foundation channel steel is owned by the user. When the main bus row of tin should be installed , the lap surface should repair leveling, clean, paint neutral Vaseline or other measures , and then fix it by bolts

  • 2.Before commissioning ,inspect and test products after installation
    (1). Check the panel paint came off and cabinet inside dry , clean..
    (2). Whether electrical components of the operating mechanism is flexible, it should not be too large or too difficult to operate
    (3). Whether the main and auxiliary contacts of main electrical appliances are reliable and accurate
    (4).Instrument calibration setting, transformers’ ratio and polarity should be correct. (5).The connection of each busbar should be good, the insulation support, installation and other accessories should be installed firmly and reliably
    (6).Whether the auxiliary contact meets the requirements, the fuse core specification is correct, the setting value of the relay meets the design requirements, and the action is reliable and accurate
    (7).The circuit connecting point is in line with the electrical schematic diagram
    (8)Whether protection circuit system meets the requirements
    (9). The insulation resistance shall not be less than 11MΩ by using 690V megameter

  • 3. Notice for using
    (1). Device is not against wall installation, positive operation, double side maintenance for low voltage power distribution cabinet. Maintenance channel and cabinets door must be qualified professional personnel who shall enter into or open operation, inspection and maintenance.
    (2). Air circuit breaker, molded case circuit breaker has several opened and closed, especially after short circuit opened and closed, it can make the contacts local burn and produce carbon material,which will cause the contact resistance increases, it should be carried out maintenance and inspection according to circuit breaker instructions.

Product integrity

  • The supplier shall provide the following documents and attachments:
    1. Device list;
    2. Product qualification certificate;
    3. Instruction manual;
    4. Factory test report;
    5. Relevant electrical drawings;
    6. Door key, operating handle and contract requires for spare parts;
    7. Main components of the installation instructions

Installation and use

Outline diagram
Installation diagram

Code

A

B

C

D

GGD06

600

600

450

556

GGD06A

600

800

450

756

GGD08

800

600

650

556

GGD08A

800

800

650

756

GGD10A

1000

600

850

556

GGD12

1000

800

850

756

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