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Branch Feeder Monitor

Fitting for both new and retrofit projects, SATEC’s Branch Feeder Monitor™, is a multi-circuit power meter, monitoring up to 18 three-phase power circuits or 54 single-phase, or any combination. The BFM-II utilizes High Accuracy Current Sensors (HACS) and is ideal for a wide range of applications, from monitoring medium-voltage substations through commercial multi-tenant billing in shopping-centers or office buildings.
It is designed for DIN-rail mounting, equipped with built-in communication ports and anti-tamper enclosures. Modular expansion allows installation of additional I/O modules and power supply.


Cost-effective: saves drastically on installation costs and space occupied by dozens of legacy meters

Multi-circuit: Modular options for multi-load metering

  • up to 18 three-phase loads
  • up to 54 single-phase loads
  • various combinations of the two

Dual Input Voltage: 2 parallel measurements for 2 different 3-phase power sources (VIM module; optional)

Revenue Meter:

  • Class 0.5/0.5S accuracy per ANSI C12.20 / IEC 62053-22
  • anti-tamper design


  • Built-in ports: RS485; ETH
  • Optional: 3G modem
  • BACnet; Modbus RTU; DNP3.0
  • IEC 60870-5-101/104

Digital & Analog I/O (modular)

  • Digital I/O: up to 72 digital I/O
  • Analog: up to 16 inputs

Multi-option Current Inputs

  • 40mA for HACS CTs (5 – 3,000A)
  • 3V AC inputs for flex clamps (Rogowski coil)

Technical Specifications

Power Meter

  • Power: True RMS volts, amps, power, energy, power factor, neutral current and many more
  • Event and parameter data-logging
  • measurement at 50/60 Hz
  • Sampling frequency: 64 samples per cycle

Harmonic Analyzer

  • Voltage and current THD, TDD and K-Factor,
  • Voltage and current harmonic spectrum and angles, up to the 25th order harmonic

Revenue Meter

  • Class 0.5S / 0.5 accuracy per IEC 62053-22 / ANSI C12.20 for active energy
  • Anti-tamper design
  • Bills up to 18 individual three-phase clients or 54 single-phase clients or various combinations in between
  • Time-of-Use billing and logging: 8 energy/demand registers x 8 tariffs, 4 seasons x 4 types of days, 8 tariff changes per day, easy programmable tariff schedule
  • Automatic 120-day daily profile for import/export energy and maximum demand readings (total and tariff registers) for each submeter
  • Pulse reading via DI for water and gas meters

Variable Current Inputs

  • HACS: 40mA HACS CT designated inputs (available HACS ratings: 100A-3,000A)
  • RS5: inputs for specific split-core HACS CTs rated 5A
  • 3V AC: inputs for Flex Clamps (Rogowski Coil)

Voltage & Power Supply

  • Nominal voltage: 120/208 – 277/480V AC (L-N/L-L)
  • Operating range: 70-561V AC 50/60 Hz (direct connection, L-L)
  • Self-Energized from measured voltage
  • Optional auxiliary power supply:
    50-290V AC, 40*-290V DC


* Above 60°C – minimum 90V DC

Dual Voltage Inputs

  • Voltage Input Module: a set of 3-phase voltage inputs for metering parallel power sources
  • Calibrated at either 50 Hz or 60 Hz
  • every submeter can be assigned to one of the measured voltages.
  • rating: identical to main voltage inputs (70 – 571V AC, L-L)

Note: When the VIM module is used, the total maximum amount of 3-phase current channels is 12

Modular I/O

  • Up to 72 DI
  • Up to 18 DO
  • 4 Analog input option

(see Module tab for detailed spec)

Programmable Logical Controller

  • Embedded programmable controller
  • 4 control setpoints, programmable thresholds and delays for each submeter
  • Relay output control (for alarm and protection)
  • 1 cycle response and update time

Graphic Display Module (GDM)

Optional 3.5” 320×240 pixel touch-screen graphic display

Real Time Clock

  • Built-in clock and calendar functions
  • Accuracy: < 5 sec/month @ 25°C

Communication interfaces


  • RS485
  • Ethernet (10/100Base-T)
  • USB (Type A)


  • 2G/3G modem

Communication Protocols

  • Modbus
  • BACnet
  • DNP3.0
  • IEC 60870-5-101/104

Meter Security

  • 3 level password security for protecting meter setups and accumulated data from unauthorized changes
  • Anti-tamper design (wiring seal)



The BFM supports various add-on modules:

  • Current inputs
  • Additional voltage inputs
  • I/O
  • Auxiliary power supply
  • 2G/3G modem

please see below for options and rules regarding possible combinations

Current Input Modules (CIM)

Up to 2 CIM modules per instrument
Up to 1 CIM module per instrument when employing VIM module (below)

  • 6 current input module – HACS version
  • 6 current input module – RS5 version
  • 6 current input module – FLEX version
  • 18 current input module – HACS version
  • 18 current input module – RS5 version
  • 18 current input module – FLEX version

2nd Voltage Input Set (VIM)

One Voltage Input Module (VIM) per device (optional)
calibrated at either 50 Hz or 60 Hz.


  • Nominal voltage: 120/208 – 277/480V AC (L-N/L-L)
  • Operating range: 70-561V AC 50/60 Hz




up to 4 DI/AI modules per BFM
up to 2 RO modules per BFM

  • 9DI: nine digital inputs (dry contact / 24/125/250V DC). 1-cycle update time; unlatched, latched, pulse and KYZ operation; energy pulses
  • 18DI: eighteen digital inputs
  • 4AI: four analog inputs, selection of: 0-20mA, 4-20mA, 0-1mA and ±1mA output; 1 cycle update time
  • 9RO: nine form-A relays

Auxiliary Power Supply

Rated voltage: 50 – 290V AC, 40*- 290V DC


* Above 60°C – min. 90 VDC


2G/3G Cellular Modem

Includes 2nd RS-422/485 communication port

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