The MRD81 electrical fire alarm is a newly-developed electrical fire protection device designed on the basis of internationally advanced technologies. It is intended to eliminate the risk of electrical fire caused by electric leakage in power distribution systems whose frequency, rated working voltage and rated working current are 50/60Hz, 400V and 16-1600A, respectively.

Advantage
1. The electrical fire protection system is compliant with GB14287.2-2005 standard, and it adopts intelligent and modular design to combine earth leakage protection and electronic technology together.

2. Thanks to the Windows operating system, humanized application software and RS485 communication interface (ModBus protocol), our electrical fire detector is able to collect original electrical signals, process these data and give orders at last, thus providing comprehensive protections against electrical fire.

Application
Our electrical fire alarm is widely used in schools, hotels, gyms, shopping malls, commercial buildings, residential communities, production workshops, mining enterprises, telecommunication companies, petrochemical engineering plants, national defense industry and other places to ensure safe utilization of electric power.

Function
1. The digital processing technology helps to real-time monitor and reveal working status of different power distribution circuits.

2. With the help of RS485 communication interface, detected data and control commands are delivered in an accurate and prompt way.

3. Due to the multilevel intelligent control system, area protection is available for the distribution circuit.

4. The electrical fire monitor sends out both audio and visual alarms according to residual current, and remote tripping is realized when the detected current is high or thought to be dangerous.

5. The electrical fire alarm realizes both intelligent data processing and intelligent parameter setting, and it can be inspected by itself or via the network.

6. When mains supply fails, our product is still able to work for more than 4 hours owing to the backup power supply system.

7. The alarm records are saved automatically to allow convenient inquiry and printing, and over 50,000 pieces of alarm message can be stored.

8. Our electrical fire alarm has expansion interfaces, and it allows remote maintenance.

Panel Side Grooving Drawing

Note
1. The live line and null line of previous circuit breaker must pass through our mutual inductor.
2. Generally speaking, round mutual inductor is recommended to work with copper or aluminum wire, while rectangular one fits for copper or aluminum busbar.
3. The shape of mutual inductor should be decided by the size of copper/aluminum wire or busbar.