HLGGD low voltage fixed type switch cabinet for power plants, substations, industrial enterprises and other power users of AC 50Hz, rated voltage 380V, rated current up to 3150A distribution system, as power, lighting and power distribution equipment power conversion, distribution and control for type NJGGD AC low voltage distribution cabinet is based on energy the higher charge of the Department, the majority of electricity consumers and the requirements of the design department, the principle of safety, economy, reasonable, new type low-voltage distribution cabinet design principles. The reliability of products with high breaking capacity, dynamic thermal stability, electrical flexible, convenient combination, series, strong practicability, novel structure, high degree of protection. Can be used as a replacement of low voltage switchgear products using.HLGGD low voltage fixed type switch cabinet with IEC439< low voltage switchgear and Control Equipment > GB7251.1-2005< low voltage switchgear > standard sets.

1 model meaning

2 normal operating conditions

1 ambient air temperature is not higher than +40 C, not less than the average temperature of.24h C -5 shall not be higher than +35.

2 indoor installation, use the site altitude not exceeding 2000m.

3. Ambient air relative humidity at the highest temperature is 40 DEG C does not exceed 50%, to allow a larger relative humidity in low temperature. (e.g. 20 DEG C for 90%) should be taking into account the effects due to changes in temperature may occasionally produces condensation.

4 when the device is installed with the vertical tilt of the degree does not exceed 5%.

5 no equipment should be installed in the place where there is no severe vibration and shock, as well as the lack of places where electrical components are corroded.

6 users have special requirements can be negotiated with the manufacturer to resolve.

2 main circuit scheme

The main circuit of the HLGGD cabinet is designed with 129 schemes, a total of 298 specifications (not including the functional changes of the auxiliary circuit and the changes of the control voltage, and the derived scheme and specifications).

Among them, HLGGD type 49 programs 123 specifications

Type HLGGD 53 programs 107 specifications

Type HLGGD 27 programs 68 specifications

Main circuit scheme is to solicit the overwhelming majority of the design, the use of the Department of the views selected. Increased power plants need to plan. Rated current increases to the 3150A, 2000kVA and the following distribution transformer suitable for selection.

In addition, in order to meet the needs of reactive power compensation, the design of HLGGD, HLGGD capacitor compensation cabinet, its main circuit scheme 4, a total of 12 specifications.

3 auxiliary circuit scheme

Design of the auxiliary circuit is divided into two parts: power supply scheme and power plant project, NJGGD cabinet has enough space to install a second element, and also developed a dedicated LMZ3D type current transformer to meet special user is attached to a power-off protection when the power plant and the need.

4 bus

Double copper bus bar is used to consider to price ratio and the feasibility of aluminum and copper, rated current 1500A and below the single aluminum busbar. Rated current greater than 1500A. Factory production according to the provisions of prototyping and passed the type test. Of course, factory production can also be equal section flow of copper busbar for aluminum bar according to the requirements of the users.

The lap surface generatrix are used tin process.

5 choice of electrical components

A. HLGGD cabinet mainly adopts domestic has been able to mass production of more advanced electrical components, such as me, DZ20, DW15 etc. and according to the economic, reasonable principle, under the premise of fully considering the feasibility of retained the available part of old products, not to use have been scouring the Ru products.

B. HD13BX and HS13BX type rotating operation knife switch is designed to meet the unique GGD cabinet structure needs a special element, it changes the mechanical mode of operation, to retain the advantages of old products, is a practical model of electrical components.

C. if the design department according to the needs of the user, selects the performance to be more excellent, more advanced technology of new type electrical apparatus. Because of the cabinet HLGGD has good flexibility of installation, generally not for updating electrical components caused by difficulties in terms of manufacture and installation.

D. in order to further improve the dynamic stability of the main circuit, design of the cabinet HLGGD dedicated ZMJ type combined bus bar clamp and insulating supporting parts. Bus bar clamp made of high strength, high flame retardant type validation alloy materials and heat molding, high insulating strength, good self extinguishing properties, unique structure, just adjust the building blocks type block can be conveniently combined into a single bus bar clamp or double bus bar clamp. Insulating support is molded sleeve type structure, low cost, high strength to solve the old products climb electrical distance is not the defects.

3 installation and use

Products arrive at the place of receipt, first of all, we should check the packaging are intact, found that the problem should be promptly notify the relevant departments to find out the reasons. For not immediately install the products should be according to the provisions of the conditions of normal use. Put in their proper places.

6.1 product should be installed according to the installation schematic diagram (see Figure 2), foundation channel steel and bolt by the user owned, main busbar installation should the faying surface repair formation, clean, painted in neutral Vaseline or take other measures, and then use the fastening bolts.

6.2 after the installation is completed, the project is put into operation before the inspection and testing of the following items.

A. check off cabinet finish inside the cabinet, is dry, clean.

B. electrical components of the operating mechanism is flexible, should not have stuck or operating force too large phenomenon.

C. The main electrical appliances off is reliable, accurate. The auxiliary contact is reliable and accurate.

D. instrument and transformer ratio and polarity is correct.

E. bus connection is good, insulation support, installation parts and accessories are solid and reliable installation.

Whether the f. auxiliary contact meets the requirements, the fuse core specification is correct, the relay setting value is in line with the design requirements, the action is accurate.

G. circuit of the contact point is in accordance with the requirements of electrical schematic.

H. protection circuit system is in line with the requirements.

I. used 500 volt megger insulation resistance value shall not be less than 1 megohm.

6.3 use note

A. This product is not against the wall mounted, single (positive) operation, double door maintenance of low voltage power distribution cabinet. Product maintenance channel and a cabinet door must by passing the examination of qualified personnel can enter or open operation, inspection and maintenance.

B. air circuit breaker, after several times, points, will be the main contact burn and produce carbon material, so that the contact resistance increases, should be regularly on the air circuit breaker according to the instructions for maintenance and repair

4 complete sets of products

The following documents and accessories shall be provided for the supply of the manufacturing plant

7.1 packing list;

7.2 product qualification certificate;

7.3 instructions for use;

7.4 factory test report;

7.5 electrical drawings;

The 7.6 door key, spare parts required operating handle and contract.

5 outline sketch map

6 ordering instructions

The following information should be provided for the user's order

8.1 full model of the product (including the number of the main circuit and the number of the auxiliary circuit);

8.2 combination sequence diagram of the main circuit system;

8.3 auxiliary circuit electrical schematic;

8.4 cabinet components list;

8.5 other special requirements for the normal use of the product.

7 installation sketch map

Schematic diagram of main circuit