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Address: 4-2, Building E, Huazhong Enterprise City, 16 North Avenue, Hankou, Wuhan City

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PGL AC low voltage power distribution cabinet

Classification:


Electrical products with voltage levels ranging from 3.6kV to 550kV, used for power generation, transmission, distribution, energy conversion, and consumption in the power system to provide on/off, control, or protection functions


Product Details


Overview
PGL AC low-voltage power distribution cabinet is suitable for power plants, substations, industrial and mining enterprises, as a low-voltage power distribution system with AC 50Hz, insulation voltage of 500V and rated working voltage of 380V for power, power distribution and lighting.
This product complies with GB7251.1-97 national standards.
 
Features
◆ PGL distribution cabinet for indoor installation, open type double-sided maintenance of low-voltage distribution device.
The basic structure of the distribution cabinet is made of thin steel plate and angle steel welding combination. There is a door in front of the cabinet, and the instrument panel above the cabinet is an openable small door, which can be equipped with indicating instruments. For parallel assembled cabinets, partitions are added between cabinets, which reduces the possibility of expanding accidents due to failures in a single cabinet. The main bus is installed on the insulation frame above the rear frame of the cabinet, and a bus protective cover is provided to prevent the vicious accident of short circuit of the main bus caused by falling metal objects above. The neutral bus is installed on the insulator under the cabinet, the main grounding point of the protective grounding system is welded under the frame, and the instrument door also has a grounding point and is interconnected with the shell.
◆ When multiple cabinets are juxtaposed, protective boards can be installed on the left and right sides of the starting cabinet and the terminal cabinet.
 
Main technical parameters
◆ Insulation voltage 500V
◆ Main circuit rated working voltage 380V AC
◆ Rated working voltage of auxiliary circuit: AC 220V/380V
◆ PGL1 type product, breaking capacity 15kA (effective value)
PGL2 product, breaking capacity 30kA (effective value)
 
Normal use environmental conditions
Ambient air humidity: not higher than 40 ℃, not lower than -5 ℃, the average temperature within 24h is not higher than 35 ℃.
◆ Altitude: no more than 2000M.
◆ Atmospheric conditions: the air is clean, the relative humidity does not exceed 50% at the highest temperature of +40 ℃, and high relative humidity is allowed at lower temperatures, for example, 90% at +20 ℃, but temperature changes should be taken into account, and moderate condensation may occur accidentally.
◆ When the equipment is installed, the inclination of the vertical plane shall not exceed 5 °.
The equipment is installed in the place without severe vibration and impact, and the place where the electrical components are not enough to be corroded.
 
internal structure
 

The switch cabinet has the functions of overhead incoming and outgoing lines, cable incoming and outgoing lines, bus connection, etc. Mainly suitable for power plants, substations, petrochemical, metallurgical steel rolling, light industry and textile, factories and mining enterprises and residential areas, high-rise buildings and other different places. It mainly includes high-voltage isolating switch and grounding switch, high-voltage load switch, high-voltage automatic coincidence and segmenter, high-voltage operating mechanism, high-voltage explosion-proof distribution device and high-voltage switch cabinet.

Correct Selection of Breaker Breaking Capacity
On the primary system diagram, the selected circuit breaker, indicating the circuit breaker model, rated working voltage and rated working current, must also be selected for the breaking capacity of the circuit breaker. With user drawings, the breaking capacity of the circuit breaker is not selected, which makes it difficult for the manufacturer to carry out engineering design. The breaking capacity selection should be based on the system short-circuit parameters. If the manufacturer does not understand the system short-circuit parameters, it is difficult to make the correct choice. There are also some user drawings, regardless of the system short-circuit parameters, blindly select high-break parameters, resulting in unnecessary waste of funds. The correct choice of breaking capacity is very important, not only to ensure safe operation, but also to consider reducing product costs.


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