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Technical Specification Sheet

Document No. A6V12309966

April 27, 2021

Siemens Industry, Inc.

Page 1 of 8

MD-3HD Model Power Meters

Description

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.

The power meters make over 75 total electrical

measurements which are derived from the voltage and

current inputs. Electrical load diagnostic parameters

such as power factor and line frequency are captured

in addition to energy and demand values.

The Siemens MD-3HD Model Power Meters require no

external power and the power supplies can

accommodate service voltages ranging from 80 to

600V (phase-to-phase). The simple installation is

accomplished by connecting the color-coded voltage

leads and clearly labeled CTs. A three-LED indicator

display confirms proper CT-to-phase installation. The

meters automatically adjust for CT orientation—greatly

reducing set-up time and all but eliminating installation

errors.

The display features an integrated 2 × 16-character

backlit display which cycles through key configuration

data along with voltage, current, power, and power

factor, by phases.

MD-3HD DIN Rail Mount Enclosure

MD-3HD Wall Mount Enclosure

Features

• 3 channels: 3-phase submeter monitors voltage,

current, power, energy, and many other electrical

parameters on single or three-phase systems

• Two models available: DIN Rail Mount Enclosure

or Wall Mount Enclosure

• Revenue grade. Third-party ANSI C12.20-2015

Class 0.2 certification

• Interval Data Recording: Store up to 63 days of

15-minute kWh data

• Continuous sampling; no blind cycles.

• Use with a full range of Siemens Split Core or

Rogowski-style CTs, including several revenue-

grade options

• 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

Summary of content (8 pages)

PAGE 1
Technical Specification Sheet Document No. A6V12309966 April 27, 2021 MD-3HD Model Power Meters Description 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.
PAGE 2
Features (Continued) • User-configurable alarm with isolated output • Data updates occur every 1.0 seconds • Patented PhaseChek™ technology confirms proper CT orientation Siemens MD-3 HD Model Power Meters use interchangeable CT options such as split-core or flexible Rogowski-style CTs. The meters have embedded Rogowski Coil CT amplifier/integrator circuitry, so there is no need to provide external power to the CTs.
PAGE 3
Technical, Continued Communications Hardware Maximum communication length Communication rate (Baud) Data bits Parity Stop bit Supported protocols Mechanical Wire connections Mounting Operating temperature Humidity Enclosure Weight (exclusive of CTs) DIN Rail model (MD-3HD-R-D-N) Wall Mount model (MD-3HD-R-D-N) Enclosure Dimensions DIN Rail model (MD-3HD-R-D-N) Wall Mount model (MD-3HD-C-D-N) Color RS-485 Serial and Ethernet 1200 meters at 100K bits/second or less Modbus: 9600, 19200, 38400, 57600, 7680
PAGE 4
Ordering Information Part Number Description MD-3HD-C-D-N 3-Phase Sub Meter with Enclosure MD-3HD-R-D-N 3-Phase Sub Meter for DIN Rail Mounting Dimensions Figure 1. MD-3HD-R-D-N Dimensions in Millimeters. Page 4 of 8 Siemens Industry, Inc.
PAGE 5
Figure 2. MD-3HD-C-D-N Dimensions in Millimeters. Siemens Industry, Inc.
PAGE 6
BACnet Protocol Implementation Conformance Statement Products Product Model Numbers Siemens MD-3HD MD-3HD-C-D-N Protocol Revision MD-3HD-R-D-N Revision 12 Vendor Information Siemens Industry, Inc. Building Technologies Division 1000 Deerfield Parkway Buffalo Grove, IL 60089 www.buildingtechnologies.siemens.com/bt/us Product Description Single-phase, three-phase ANSI C12.20-2010 Class 0.2 revenue grade power metering kits. Supports BACnet MS/TP and Modbus RTU Communication protocol (MD-BMS models).
PAGE 7
Standard Object Types Supported Product Object Type Creatable Deletable BACnet Energy Meter Kits with CTs Analog Value No No Device No No Data Link Layer Options Product Data Link and Options BACnet Energy Meter Kits with CTs BACnet IP, (Annex J), Foreign Device (MD-BMED only) MS/TP master (Clause 9), baud rate(s): 9600 bps, 19200 bps, 38400 bps, 76800 bps Segmentation Capability Product Segmentation Type Supported Window Size BACnet Energy Meter Kits with CTs Can transmit segmented mess
PAGE 8
Character Sets Product Character Sets Supported BACnet Energy Meter Kits with CTs ISO 10646 (UTF-8) Supported Services Product Application Service Initiates Requests Executes Requests BACnet Energy Meter Kits with CTs ReadProperty Service No Yes ReadPropertyMultiple Service No Yes WriteProperty Service No Yes Who-Is No Yes Who-Has No Yes I-Am Yes No I-Have Yes No Information in this document is based on specifications believed correct at the time of publication.