Indoor Fire-fighting DC Screen Control Cabinet

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1. **Overview**
- The indoor fire-fighting DC screen control cabinet is a key equipment in the fire-fighting system. Its main function is to provide a stable and reliable DC power supply for fire-fighting equipment (such as fire pumps, fireproof rolling shutter doors, emergency lighting for fire protection, etc.). In emergency situations like fires, when the mains power is interrupted or fails, it can ensure that the fire-fighting equipment operates normally within a certain period of time, providing a guarantee for personnel evacuation and fire extinguishing work.

2. **Component Structure**
- **Cabinet Part**:
- The cabinet is generally made of high-quality metal materials, such as cold-rolled steel plates, through processes like bending and welding. Its outer shell has a certain protection level, usually reaching IP30 or above, which can prevent dust, small animals, etc. from entering the interior and affecting the normal operation of the equipment. The size of the cabinet is designed according to the actual application scenarios and installation requirements, and the internal space is reasonably arranged to facilitate the installation of various electrical components and wiring.
- **Power Module**:
- This is the core part of the DC screen control cabinet. It includes a charging module and a battery pack. The charging module converts alternating current into direct current, charges the battery pack, and also provides a DC power supply for external fire-fighting equipment. The charging module has multiple protection functions, such as overvoltage protection and overcurrent protection, to ensure the safety and stability of the charging process. The battery pack generally adopts maintenance-free lead-acid batteries or valve-regulated sealed lead-acid batteries, and its capacity is determined according to the power and working time of the fire-fighting equipment that needs to be supported, enabling it to provide continuous power support for the fire-fighting equipment when the mains power fails.
- **Monitoring Module**:
- The monitoring module is responsible for real-time monitoring of the operating status of the entire DC screen control cabinet. It can monitor parameters such as the output voltage and output current of the power module, the voltage of the battery pack, and the charge and discharge currents. Through the communication interface, the monitoring module can transmit these parameters to the monitoring system in the fire control room, facilitating staff to timely understand the equipment operation situation. When abnormal situations occur, such as excessively high or low voltage, overcharging or overdischarging of the battery, etc., the monitoring module will send out alarm signals to remind the staff to handle them.
- **Power Distribution Unit**:
- The power distribution unit is mainly used to distribute the DC power supply to various fire-fighting equipment. It includes electrical components such as fuses, circuit breakers, and contactors. These components can reasonably allocate power resources according to the power and current requirements of different fire-fighting equipment, and also have functions such as short-circuit protection and overload protection to ensure that each fire-fighting equipment can obtain a DC power supply safely and reliably.

3. **Working Principle**
- Under normal circumstances, the mains power is connected to the charging module of the DC screen control cabinet. The charging module converts alternating current into direct current. On the one hand, it charges the battery pack to keep the battery pack in a fully charged state; on the other hand, it provides a stable DC power supply for the fire-fighting equipment. When the mains power fails or is interrupted, the battery pack automatically switches to the power supply mode and transmits direct current to various fire-fighting equipment through the power distribution unit to ensure that the fire-fighting equipment can operate normally. The monitoring module continuously monitors the operating parameters of the equipment throughout the process to ensure the stability and security of the system.

4. **Installation Requirements**
- **Environmental Requirements**:
- The indoor fire-fighting DC screen control cabinet should be installed in a dry and well-ventilated indoor environment. Avoid installing it in damp, places with corrosive gases, or flammable and explosive areas. The ambient temperature is generally required to be between -10 °C and 40 °C, and the relative humidity should not exceed 90% (without condensation). Because a damp environment may cause electrical components to be damaged by moisture, corrosive gases may corrode metal parts, and a high-temperature environment may affect the performance and service life of the equipment.
- **Installation Location**:
- It should be installed in a position that is convenient for operation, maintenance, and inspection. It is usually installed near the fire control room or in a dedicated electrical equipment room. The installation height should conform to ergonomic principles to facilitate staff to view and operate the equipment. Generally, the bottom of the cabinet is about 0.8 - 1.2 meters from the ground. Meanwhile, a certain space should be left around the cabinet to facilitate ventilation, heat dissipation, and equipment maintenance. The distance between the cabinet and the wall should not be less than 0.8 meters.
- **Electrical Connection**:
- When connecting the mains power, it is necessary to ensure that the cross-sectional area of the power line meets the requirements of the equipment, and the connection is firm and reliable. The grounding system should be perfect, and the outer shell of the cabinet must be reliably grounded, with the grounding resistance not exceeding 4Ω. When connecting the battery pack and the power distribution unit, attention should be paid to the positive and negative polarities to avoid equipment damage caused by reverse connection. Meanwhile, all electrical connections should adopt standard terminal blocks and wires to ensure the quality of electrical connections.

5. **Maintenance Points**
- **Daily Inspection**:
- Check the operating parameters displayed on the monitoring module every day, including voltage and current, etc., to ensure that the parameters are within the normal range. Check whether the ventilation openings of the cabinet are unobstructed to ensure good heat dissipation of the equipment. Meanwhile, check whether there is abnormal heating on the surface of the equipment. If there is heating, it may be caused by the failure of electrical components or poor connections.
- **Regular Maintenance**:
- Conduct an appearance inspection of the battery pack once a month to check whether there are phenomena such as bulging or leakage on the battery shell. Conduct a functional test on the charging module once a quarter to check whether its charging performance and protection functions are normal. Conduct an inspection on the electrical components of the power distribution unit once every six months to check whether the fuses are blown and whether the actions of the circuit breakers are sensitive, etc. Meanwhile, regularly clean the dust inside the cabinet to keep the equipment clean.
- **Fault Handling**:
- When the monitoring module sends out an alarm signal, promptly check the alarm information to determine the fault type. If it is a voltage abnormality, first check the charging module and the battery pack; if it is a current abnormality, check whether the fire-fighting equipment has a short circuit or overload phenomenon. For simple faults, such as a blown fuse, the fuse can be replaced in a timely manner; for complex faults, such as damage to the charging module or a decline in the performance of the battery pack, professional personnel are required to repair or replace components.#transformers #transformer #electrical #technology #factory #foryou #viral #shortvideo #manufacture #machine #power #shorts #trending #wiring #factorywork #electricalengineering #powertransformer #electriacaltransformer #manufacturing #process #manufacturer #manufacturingprocess #HighVoltageWinding #usa #canada #australia #uk#dailyvlog #daily #bluecollar #Tesla#WorkshopDaily #electricwire #powerengineering #transformer #foilwinding #lowvoltagenation #electricalengineering #LowVoltageFoilWinding #FoilWinding #ElectricalEngineering #TransformerDesign #InductorDesign#TransformerTechnology #ElectricalEngineering #FoilWinding #TransformerManufacturing #EnergyEfficiency #ElectricalDesign #TransformerWinding #EngineeringInnovation #TransformerTechnology #CopperFoilWinding #PowerTransformers #EngineeringTechniques #ElectricalComponents