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The working principle of the fire emergency power supply system: the fire emergency power supply adopts the single inverter technology, which integrates the charger, battery, inverter and controller into an integrated system. The battery detection and branch inspection circuit is designed in the system, and the backup operation mode is adopted.

1. When the mains is normal, the mains through mutual switch device for important load power supply, the simultaneous detection and qiang battery electric, management, and then provided by the battery to the inverter dc energy here, only to the battery charger is a provide equivalent to 10% of charging current of battery capacity (Ah) small power dc power supply, it doesn't have directly to the inverter's ability to provide dc power supply.

2. When the mains power supply is interrupted or the mains voltage exceeds the rated input voltage (±15% or ±20%), the interswitch device will immediately switch to the inverter for power supply. Under the support of DC energy provided by the battery pack, the power used by the user at this time is the AC power converted by the inverter of EPS, rather than from the mains power.

3. When the mains voltage return to normal work, EPS control center sends a signal to the inverter to execute automatic shutdown operation, but also by its switch execution from the inverter power supply to ac bypass switch operation since then, the EPS in the exchange of bypass power supply channel to provide load at the same time, also through the charger to the battery pack.

Advantages of fire emergency power system :1. When the power grid is powered, it is static and noiseless;

During power supply, the noise is less than 60dB, no smoke exhaust and shockproof treatment is required, and it has the characteristics of energy saving and no public hazard and no fire hazard.

Automatic switching can realize unattended. The switching time between power supply and EPS power supply is 0.1 ~0.25s.

3. Strong load capacity, EPS is suitable for inductive capacitance and comprehensive load of equipment, such as elevator, water pump, fan office automation equipment, emergency lighting, etc. 4. Reliable use.

The service life of the main engine is over 20 years.

Adapt to harsh environment.

It can be placed in the basement or distribution room, or it can be set up on site close to the emergency load use area to reduce power lines.

The above is an introduction to the advantages and working principles of the fire emergency power supply system.