3-Phase Sub Meter for DIN Rail Mounting

Siemens Industry's MD-3HD Model Power Meters are submetering devices designed to provide real time, accurate electricity metering to enable proper control over energy costs. The meter can capture kWh/kW energy and demand data, as well as virtually all relevant energy parameters for diagnostics and monitoring on three-phase or single-phase circuit installations. The meters’ flexibility, size, and ease-of use make them ideal tools for gathering detailed consumption information in commercial, industrial, governmental, and retail environments.

The meters use direct connections to each phase of the voltage and various interchangeable current transformer (CT) options such as split-core CTs or flexible Rogowski Coils (for large loads or large cables and bussbars) to monitor current on each phase. All of Siemens' current transformers are internally shunted for intrinsically safe operation on energized conductors.

Product Features:

• 3 channels: 3-phase submeter monitors voltage, current, power, energy, and many other electrical parameters on single or three-phase systems
• Interval Data Recording: Store up to 63 days of 15-minute kWh data
• Continuous sampling; no blind cycles.
• Line-Powered: 90 to 600V Phase-to-Phase Power Supply
• Display shows real-time information about the meter configuration and metered data
• Communicate using either BACnet or Modbus protocol
• User-configurable alarm with isolated output
• Data updates occur every 1.0 seconds
• Patented PhaseChek technology confirms proper CT orientation

Product Specifications:

• Mounting: TS35/7.5 DIN Rail
• Operating temperature: -4° to 140°F
• Humidity: 5% to 95% non-condensing
• Enclosure ABS Plastic, 94-V0 flammability rating
• Color: Black
• Wire Connections: 12-28 AWG 600 Vac, Voltage connection must be #14 AWG or larger and 600 Vac rate
• Power: From L1 Phase to L2 Phase, 90 to 600 Vac RMS, CAT III 50/60 Hz, 500 mA maximum
• Line frequency: 50/60 Hz
• Sampling: Continuous 1.8 kHz (no blind cycles)
• Parameter Update Rate: 1.0 second
• Maximum Current Input: 150% of current transducer rating (mv CTs) to maintain accuracy. Measure up to 4000 Amps with RoCoil CTs.
• Measurement Rating: True RMS using high-speed digital signalprocessing (DSP)
• Accuracy: 0.2% ANSI C12.20-2015 Class 0.2 (3rd party certification pending)
• Resolution: 32-bit floating point
• Display: 2 × 16-character display with tri-color backlight
• Hardware: RS-485 Serial and Ethernet
• Supported Protocols: Modbus RTU, BACnet MS/TP, Modbus TCP or BACnet IP