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WEFM-106 Electrical Safety Monitor

General introduction:
WEFM-106 electrical safety monitor is specially designed for systems operating under the voltage of 0.4Kv, which integrates monitoring, measuring, analysis, management, alarm, tripping and metering into one multifunctional product. With the functions of fire monitoring, local control and electric energy measurement, the monitor can be used both for local analysis, early warning and control, and remotely control by linking to the system.
Our electrical safety monitor is suitable for electric fire prevention centralized monitoring, energy management and electric power monitoring in large shopping malls, living quarters, industrial and mining enterprises, office buildings, hotels and other areas.

Technical specifications
Items Technical index
Wiring form Three-phase four-wire, 45 Hz~65 Hz
Input Voltage(A\B\C) Voltage class: 0.4kV Accuracy: RMS 0.2 % Resolution: 0.01V
Current(A\B\C\zero line) Rated current(secondary side)In:1A, 1.5A, 5A, Imax:10A Accuracy: RMS 0.2 % Resolution: 0.001A
Temperature Type: NTC thermal resistance,4 channel Measurement range: -10℃~150℃ Accuracy: ±1℃
Harmonic (phase line) Harmonic number: 2~50 times Accuracy: class A
Switch input(DI) 4 channel dry contact input, DO signal generated by fire control linkage is available optocoupler isolation, 4000VRMS
Output Electromagnetic delay output(DO) 2 channel electromagnetic delay output (one for alarm, one for tripping) Normally open Contact rating: AC 250V /5A; DC 30V /5A
Display Multi-line LCD large-screen dot matrix LCD display
Alarm and instructions Sound and light alarm: 1 buzzer, 5 LED lights
Electric energy pulse 1 channel active electric energy pulse
Protection Temperature protection Alarm setting range: 45℃~140℃, step: 0.1℃ Action time setting range: 0S~99.0S, step: 0.1S Execution mode: off/alarm/trip
Zero line current protection Alarm setting range: 20mA ~ Imax, step:1mA Action time setting range: 0S~60.0S, step:0.1S Execution mode: off/alarm/trip
Phase current overcurrent protection Alarm setting range: >100%, step:0.1% Action time setting range: 0S~60.0S, step:0.1S Execution mode: off/alarm/trip
Overvoltage protection Alarm setting range: >100%Un, step:0.1% Action time setting range: 0S~60.0S, step:0.1S Execution mode: off/alarm/trip
Under-voltage protection Alarm setting range: < 100%Un, step:0.1% Action time setting range: 0S~60.0S, step:0.1S Execution mode: off/alarm/trip
total harmonic distortion protection Alarm setting range: 0% ~100%, step:0.01% Action time setting range: 0S~99.0S, step:0.1S Execution mode: off/alarm/trip
Three-phase imbalance protection Alarm setting range: 0% ~100.00%, step:0.01% Action time setting range: 0S~99.0S, step:0.1S Execution mode: off/alarm/trip
Communication RS-485 communication port Port type: 2 channel two-line half duplex Communication rate:600bps~38400bps Protocol: Modbus-RTU
Metering Electric energy Metering accuracy class: active: class 0.5S or class 1; reactive: class 2
Environment Working temperature -25℃~+60℃
Limit working temperature -35℃~+70℃
Relative humidity ≤95%(RH)
Power supply AC or DC power supply
maximum input range: 40V~420V
Power consumption: ≤1W, 2VA
installation mode Embedded installation
Size Outline size(mm): 120×120×107 Hole size(mm): 114×114
Weight About 675g

Main features
1. Our product adopts high-precision sampling and measuring unit and high-speed MCU data processing unit, realizing high precision, wide range and accurate measurement as well as fast data analysis.
2. Adopt 240*160 dot matrix LCD display LCD display to show richer contents.
3. The LCD display is equipped with white backlight to meet the requirement of consulting data in dark environment.
4. Adopt nonvolatile memory to store all kinds of data, which can save data for a long time without losing data due to power failure.
5. With the high precision clock chip, the accuracy of the clock is guaranteed in the working temperature range.
6. Support RS-485 communication port and industrial standard communication protocol, convenient and flexible for network construction.
7. The voltage loop, current circuit, temperature loop, and communication circuit of the monitor use full isolation devices, which ensure the safety of the product.

Main funcitons
1. Acquire temperature, zero line current, phase voltage, phase current, power, power factor, frequency, phase angle, harmonic current, harmonic rate(HRU, HUI), total harmonic distortion, three-phase imbalance and other data in real time.
2. Realize the prediction, early warning and forecasting of electrical fire: through all-weather monitoring of the state changes in the circuit, the monitor can transform the electricity consumption into visualized digital monitoring and acquire the running data of the circuit in real-time for analysis, monitoring alarm and self-control harmonic elimination. The monitoring data can be used for analysis after the fault occurs.
3.Through the management and analysis of the electric power consumption of the line, our monitor can realize electricity saving and orderly electricity consumption.

WILLFAR as a reliable electrical safety monitor manufacturer, it is also called as electrical circuit monitor and electrical fire monitor, mainly manufacture meter data management instrument and energy efficiency management instrument, for smart data logging, power quality monitoring, data management applications. To serve daily life much better, WILLFAR company also provides custom electrical energy efficiency management solutions as well as smart metering system in customer demands.

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