MFM383A
MFM383A
The MFM383A multifunction meter features a 3-row LCD display with backlight, capable of displaying up to 7½ digits for energy readings. It supports automatic and manual scrolling and has programmable reset options for energy display.
The meter provides high accuracy with voltage and current measurements at ±0.5% of full scale, power factor at ±0.01, and frequency at ±0.1%. It measures active, reactive, and apparent power and energy with a class 1 accuracy.
The device operates within a voltage range of 11 to 300V AC (L-N) and 19 to 519V AC (L-L), with a nominal current input of 5A AC. It supports a frequency range of 45 to 65Hz and various electrical connections including 3Ø-3 wire, 3Ø-4 wire, 2Ø-3 wire, and 1Ø-2 wire.
The operating temperature ranges from -10º to 55ºC, with storage temperatures from -20º to 75ºC. It can handle up to 85% relative humidity in non-condensing conditions.
The meter supports true RMS measurement for voltage and current, Modbus RTU communication via RS485, and programmable CT/PT primary and secondary settings. It also provides a single pulse output for energy readings.
The MFM383A complies with IEC 61326-1 for EMI/EMC standards, including ESD immunity, surge immunity, and radiated susceptibility. It meets various levels of compliance for conducted emissions and electrical fast transients.
The device is panel-mounted, weighing 310 grams, and supports cable sizes from 0.5 to 2.5 mm with a tightening torque of 0.68 to 0.79 N-m.
It includes RS485 communication with a maximum transmission distance of 500 meters and supports various transmission speeds. The pulse output voltage range is up to 24V DC with a current capacity of 100mA.
Catalog excerpts
Multifunction Meter 3Ø True RMS (Voltage, Current) 3Ø Power (Active, Reactive & Apparent) Energy (Active, Reactive & Apparent) Programmable CT / PT Primary / Secondary Modbus RTU Communication (RS485) (Optional) Single pulse output Display specications Output Specications 3 rows, LCD with Backlight Lowest 7½ digit for energy display Input specications Pulse output Voltage range : External 24V DC max Current capacity : 100mA max Pulse width : 100ms ±5ms Communication interface and protocol Communication address Electrical connection Transmission mode Half duplex Input voltage range Transmission distance Transmission speed Input current range Display scrolling Automatic / Manual Stop bits Power consumption Response time 100ms (Max and independent of baud rate) Display reset For energy : 0.1k, 1k (depending upon CT ratio x PT ratio) For power, Voltage, Current : Auto resolution For Power Factor : 0.001 Voltage (L - N / L - L) : ±0.5% of F.S. Current : ±0.5% of F.S. Power factor : ±0.01 Frequency : ±0.1% For L - N Voltage >20V For L - L Voltage >35V Power (Active, Reactive, Apparent) : 1% Energy (Active, Reactive, Apparent) : Class 1 Memory retention Measuring parameters Voltage (L - L / L - N) (Individual / Average), Current (Individual / Average), Frequency, Power Factor (Individual / Total), Active, Reactive & Apparent Power (Individual / Total), Active, Reactive & Apparent Energy (Total) Auxiliary supply specications Supply voltage Settable parameters CT Primary 1 / 5A upto 10kA (Programmable for any value) Environmental specications Temperature Operating temperature : -10º to 55ºC Storage temperature : -20º to 75ºC Mechanical specications
Open the catalog to page 1
Multifunction Meter Applicable EMI / EMC Standards Product Standard : IEC 61326 - 1 Category Side view Panel cutout Front bezel valid for communication model only ESD Immunity Surge immunity Radiated susceptibility Level III, 80 to 1000MHz (10V / m) IEC 61000 - 4 - 3 Level II, 1.4GHz to 2GHz (3V / m) Level I, 2GHz to 2.7GHz (1V / m) Conducted susceptibility Voltage dips and interruptions Dips : 0% residual voltage / 1 cycle (Criteria B), 40% residual voltage / 10 cycles 50Hz / 12 cycles 60Hz (Criteria C) 70% residual voltage / 25 cycles IEC 61000 - 4 - 11 50Hz / 30 cycles 60Hz (Criteria C) Interruptions...
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- Temperature controller
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