Smt circuit board assembly for residual current electrical fire

Smt circuit board assembly for residual current electrical fire monitoring

In daily life, fires caused by circuit problems occur from time to time, which causes great threat to the safety of our lives and property. Therefore, how to monitor the residual current in the line and warn the occurrence of electrical fires in advance is particularly important. The residual current electrical fire monitoring device Smt circuit board assembled by FASTPCBA escorts your life.

The Smt circuit board assembly device is installed in a 0.4kV low-voltage power distribution system. It is used to detect the residual current, temperature and other electrical parameters related to electrical fire hazards in TN-CS, TN-S and local TT systems. When the detected parameters exceed the alarm setting. The value is directly alarmed and controlled to eliminate the electrical fire hazard caused by residual current.

Applicable environment:

Working temperature: -10 °C ~ +55 °C

Storage temperature: -20 ° C ~ +70 ° C

Relative humidity: ≤95% without condensation

Altitude: ≤2500m

Pollution degree: Class III, installation category: Level III

Technical Parameters:

Rated residual current action value: 30mA~1000mA continuously adjustable

Action delay time: 100mS ~ 60S continuously adjustable

Temperature alarm value: 50 ° C ~ 120 ° C

Measuring grid frequency: 45Hz ~ 65Hz

Measurement accuracy: Residual current measurement accuracy is 2 grade, temperature is ±1 °C, others are 0.5 grade

Alarm: sound and light alarm and remote alarm

Switching input: 3-way AC220V active contact input

Relay output: mechanical contact, contact capacity AC220V/3A, DC30V/3A

Electrical energy: open-collector optocoupler pulse, pulse constant: 10000imp/kWh

Communication: RS485 interface Modbus-RTU protocol

The Smt circuit board assembly of this residual current type electrical fire monitoring device will greatly reduce the production cost while maintaining high safety. It is widely used in intelligent buildings, high-rise apartments, hotels, restaurants, commercial buildings, industrial and mining enterprises, national key fire protection units and petroleum. Chemical, financial, telecommunications and other fields.