Power Distribution System



The internal environment control system is a highly intelligent automatic control system which integrates mechanical, electrical and computer control specially developed by Nature’s Miracle Holding Inc. for the internal environment control of the greenhouse.

Its electronic control system is divided into three parts: the main circuit of the power distribution room, the control system circuit and the partial circuit of the fill light.

The core of the electronic control system is the control part, which is divided into sensor unit, control unit, execution unit and bus system.

By controlling the fans, fertilizer applicators, curtains, skylights, wet curtains, fill lights and other parts in the greenhouse, the entire environmental system in the greenhouse is controlled.



Nature’s Miracle Holding Inc. will design different switch cabinets according to different user needs, and tailor different electronic control systems for the different internal environment control systems of each greenhouse.

The switchgear and control cabinet shall be firmly installed, reasonably arranged, neatly arranged and beautiful, with neat wiring and complete signs and numbers. Components with the same structure can be interchanged, and the equipment is highly maintainable.

Each distribution box has enough maintenance space for easy maintenance and repair.

The power distribution cabinet can be monitored and controlled in real time by the computer. Data such as daily electricity consumption of each part of the climate system can be generated on the computer to facilitate the management of system electricity consumption.



According to different switchgear designs, the shape and structure of the switchgear in the power distribution room are different, but they all have the following characteristics:

1. Adopt bottom-in and bottom-out wiring method, front door, convenient wiring and maintenance;

2. It is made of high-quality cold-rolled sheet with a thickness of not less than 2MM, and the surface is plastic-sprayed;

3. Equipped with a complete and reliable grounding protection circuit to ensure the safety of equipment and operation and maintenance personnel;

4. There are different numbers of cooling slots at both ends of the cabinet.



The control unit is mainly composed of PLC and its expansion modules, and is controlled by a computer.

The PLC configured in this system is the core of the control and operation of the entire climate system. It controls and monitors the entire climate system, diagnoses and protects the system’s faults, generates system reports on the computer, performs system fault alarms, and generates real-time system dynamics. Flow chart for setting system control parameters.

This product has three control modes: manual, automatic and remote control.

The main components of the control cabinet include transformers, AC contactors, PLC and its expansion modules, relays, flowmeters, EC*pH display screens, etc., as well as the electrical wiring and protection required.

The electrical appliances used are all international first-line brands such as Siemens and Omron, with high reliability and excellent performance


Parameters Value
Input rated voltage and frequency 380V , 50HZ
Appearance color RAL7032
In and out way Down in and down out
Installation method Vertical floor installation
cooling method Air cooling

The electronics of the control cabinet are installed by way of chute, which is very convenient to dismantle. There are overcurrent, overvoltage, overload and other protection circuits.



The power distribution cabinet is equipped with a lightning protection module to provide a current discharge channel to protect the safety of the electrical equipment at the rear stage.

Adopt bottom-in and bottom-out wiring method, front door, convenient wiring and maintenance;

With a drain flange, there is a fused rubber sealing strip at the corresponding position behind the door;

With two left and right waterproof covers, metal gauze is welded in the waterproof ventilation holes to effectively prevent water vapor and dust from entering;

With reliable grounding protection to ensure the safety of equipment and operation and maintenance personnel.


Parameters Value
Input rated voltage 380V
Lightning protection level C-level lightning protection
Appearance color RAL7032
Appearance size 800CM*400CM*2000CM
In and out way Down in and down out
Installation method Vertical floor installation
Cooling method Natural cooling

The power distribution cabinet adopts the structure of low-voltage power distribution cabinet. The strength of the cabinet is greater than or equal to 50KA/1S. The front door is operated with a single door.