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500KVA Substation Low Voltage Distribution Panel

The low voltage switchgear is a device connected to low voltage cable. General power supply bureaus and substations use high-voltage cabinets, and thru the power transformer for step down to low-voltage cabinets, then thru low-voltage cabinets to each power distribution box. It is an electric equipment assembled of some switchgear, circuit breakers, protection devices and circuit breakers etc.The high and low voltage switchgear is an electrical equipment. The outside line firstly enters to the main control switch in the cabinet and then enters to the sub-control switch. Each branch is set according to its needs Such as the instrument, automatic control, motor magnetic switch, various AC contactors, high voltage bus and low voltageoom switch cabinet etc.
  • Brand:

    ZDDQ
  • item no.:

    ZD-GGD
  • Payment:

    T/T
  • product origin:

    China
  • Color:

    RAL7035 or RAL7032
  • shipping port:

    Shanghai/Ningbo
  • Lead Time:

    25 working days after payment
  • Product Detail
Principle of Low-voltage Distribution Cabinet

The working principle of low-voltage distribution cabinet starts from the access point of power supply, that is, the incoming cabinet. Once the power is connected to the incoming cabinet, it is distributed to each outgoing cabinet through the busbar system. The busbar is the current transmission component in the distribution cabinet, usually made of highly conductive materials (such as copper or aluminum), which can effectively transmit current to each branch. The outgoing cabinet is equipped with components such as circuit breakers and contactors, which perform circuit connection and disconnection operations according to control signals. The circuit breaker automatically disconnects when the circuit is overloaded or short-circuited to prevent damage to the circuit; while the contactor is used to frequently connect or disconnect the circuit as needed. In addition, the low-voltage distribution cabinet is also equipped with various protection devices, such as relays and fuses, which can monitor the circuit status in real time and take protective measures quickly in abnormal situations. Relays switch circuits based on specific input signals (such as current, voltage or temperature), while fuses automatically cut off the circuit when the current exceeds its rated value to protect electrical equipment from damage. These measures together improve the operating efficiency and safety of the power system.

LV Distribution Cabinet

Specification

Product Attribute Table

Single Line Diagram

GGD Stuture Character

1. Internal structure galvanized, external pickling phosphating;
2. The cabinet is made of profiled steel and positioned by a 3-dimensional gusset plate;
3. The mounting holes of the bar frame and parts change according to the modulus E=25mm.
4. The motor control center (MCC) switchgear has two types: wall-mounted and not wall-mounted. The top is the horizontal busbar area, and the horizontal area is the drawer functional unit area;
5. The structure of the power center (PC) feeder cabinet is similar to that of the incoming line cabinet. When the feeding current is 630A~1600A, a cabinet of 1000*1000*2200 (width*deep*height) can be installed with two circuits, which are installed up and down;
6. The drawer function unit and the door are mechanically interlocked by the operating mechanism of the main switch. The functional unit compartments are separated by metal loose, the drawers are interchangeable and have a working position, a test position and a separation position.  

Structure

Features

1. Ambient air temperature: -5℃~+40℃ and the average temperature should not exceed +35℃ in 24h;
2. Indoor altitude above sea level: Maximum installation altitude: 2000m;
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 ZDDQ service.

Factory & Applicaitons

ZDDQ Products are widely used for fluctuating loads such as motors, variable frequency drives, melting furnace from Steel Rolling mills,Chemical industry,Cement plant, Suger plant, Textile, Hospitals, Hotels, Building segment,Automobile industry,Oil and gas industry,public grid etc.


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