XL21 Low Voltage Electricity Cabinet

Jinneng electric Low-voltage power distribution cabinets are essential components in power supply systems for industrial, commercial, and large-scale civil buildings. Typically referring to AC distribution cabinets with rated voltages of 1000V and below, they are often regarded as the "heart of the workshop" or the "power hub of equipment." These cabinets are responsible for distributing and controlling low-voltage electrical energy from transformers safely, reliably, and in an organized manner to various power equipment (such as motors, water pumps, fans, compressors, etc.).

 

 

Enclosure: A metal housing that provides a protection rating (IP54 for dust and water resistance), ensuring the safety of internal components.

Busbar System: Includes horizontal and vertical busbars

Incoming Line Unit:

Main Circuit Breaker (Air Circuit Breaker): Acts as the main power switch, offering high breaking capacity and protective functions.

Distribution Unit:

1. Branch Circuit Breakers (Molded Case Circuit Breakers or Miniature Circuit Breakers): Provide overload and short-circuit protection for individual branches.

2. Motor Starters:

Contactors: Used for frequently switching motor circuits on and off.

Thermal Overload Relays or Motor Protection Circuit Breakers

3.Fuses: Provide faster short-circuit protection.

Control and Measurement Unit:

1. Indicator Lights (Red, Green, Yellow): Display equipment status

2. Buttons and Selector Switches

3. Instruments: Voltmeters, ammeters, energy meters, power factor meters, etc.

Auxiliary Equipment:

1. Current Transformers

2. Terminal Blocks: Used for internal and external wiring.

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● Power Distribution: Distributes electrical energy from the main power source through multiple branches to different areas of electrical equipment.

● Control and Protection: Controls the start, stop, and speed regulation of motor-driven equipment and provides protection against overload, short circuit, under-voltage, and phase failure to ensure the safety of both equipment and personnel.

● Isolation and Power Shut-off: Provides a clear disconnection point for easy equipment maintenance and servicing, ensuring operational safety.

● Monitoring and Metering: Utilizes instruments (voltmeters, ammeters, power factor meters) and power monitoring devices to track real-time electrical parameters such as voltage, current, power, and energy consumption.

● Power Factor Improvement: Can integrate capacitor compensation devices (such as SVG or capacitor banks) for reactive power compensation of inductive loads, improving the system's power factor and reducing energy losses.

 

 

Switch-Fuse Combination Unit

Model number	Rated current (A)	Rated current of melt(A)	Remarks
HR3-400/34	400	150,200,250,300,350,400	There is no melt when installing the isolating blade

 

Air circuit breaker

Model number	Rated current(A)	Trip set current(A)
MLM5-40/390	20	7,10,15,20,30,40
MLM1-100/300	100	15,20,25,30,40,50,60,80,100
MLM1-250/300	250	100,120,140,170,200,225,250

 

Current transformer

Model number	Primary current(A)	Secondary current(A)
LM-0.5	75,100,150,200,300,600	5

 

Fuse

Model number	Fuse	Rated current of the fuse(A)
RL1-15	15	2,4,5,6,10,15
RL1-60	60	20,25,30,35,40,50,60
RL1-100	100	30,40,50,60,80,100
RL1-200	200	80,100,120,150,200
RL1-400	400	150,200,250,300,350,400

 

 

● Industrial Plants: Power and control for production lines, machine tools, pumps, fans, etc.

● Commercial Buildings: Power distribution for central air conditioning chillers, water pumps, elevators, and other power equipment.

● Infrastructure: Used in pumping stations, wastewater treatment plants, airports, railway stations, etc.

● Real Estate: Provide power supply for fire pumps, domestic water pumps, ventilation fans, etc., in residential complexes.

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