Siemens MD-12HD - Appendix D- MD-Xxhd Technical Specifications

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Appendix D— MD-xxHD Technical Specifications
Specification
Description
Service Types
Single Phase, Split Phase, Three Phase-Four Wire (WYE), Three Phase-Three
Wire (Delta)
Voltage Channels
90-346 Volts AC Line-to-Neutral, 600V Line-to-Line, CAT III.
Two voltage reference inputs (MD-48HD only)
Current Channels
12 (MD-12HD) or 48 (MD-48HD) channels, 0.525 VAC max, 333 mV CTs, 0-4,000
Amps depending on current transducer
Maximum Current Input
150% of current transducer rating (mV CTs) to maintain accuracy. Measure up to
4000A with RōCoil CTs.
Measurement Type
True RMS using high-speed digital signal processing (DSP) with continuous
sampling
Line Frequency
50-60 Hz (45 – 70 Hz measureable range) – measurement taken L1-N
Power
From L1 Phase to L2 Phase. 90-600VAC RMS CAT III 50/60Hz, 500mA AC Max
Use of 12 volt auxiliary output requires 100 VAC minimum input voltage.
AC Protection
0.5A Fuse 200kA interrupt capacity
Power Out
Unregulated 12VDC output, 200 mA, self-resetting fuse
Waveform Sampling
1.8 kHz (MD-48HD), 3.6 HZ (MD-12HD)
Parameter Update Rate
1 second
Interval Data Recording
Energy (kWh) values are recorded every 15 minutes for 63 days (downloadable
log)
Each record is time stamped.
Measurements
Volts, Amps, kW, kVAR, kVA, aPF, dPF, kW demand, kVA demand, Import
(Received) kWh, Export (Delivered) kWh, Net kWh, Import (Received) kVAh,
Export (Delivered) kVAh, Net kVAh, Import (Received) kVARh, Export (Delivered)
kVARh, Net kVARh, THD, Theta, Frequency. All parameters for each phase and
system total.
Accuracy
0.2% ANSI C12.20-2010 Class 0.2
Resolution
Values reported in IEEE-754 single precision floating point format (32 bit)
Indicators
Optional 4-line display, tri-color backlight (PhaseChek™)
Alarm Output
Over/Under Voltage and Current (SPDT Relay - 30 Vdc)
Pulse Inputs
MD-12HD – 4 inputs
MD-48HD – 2 inputs **
3.3V sourcing voltage (current limited) to customer dry contact pulse output
Maximum Pulse Rate 10 HZ (50 msec minimum transition time)
** Available Q4 2018
Communication
Hardware
RS-485, Ethernet, & USB (for configuration only)
Supported Protocols
Modbus RTU or BACnet Master Slave Token Passing protocol (MS/TP)
Modbus (using SunSpec IEEE-754 single precision floating point model)
Max Communication
Length
1200 meters with Data Range of 100K bits/second or less
RS-485 Loading
1/8 unit