DMWH300
Electro Industries/GaugeTech
The Leader in Web Accessed Power Monitoring
Revenue Accurate to
Utility Metering
Standards
• Sub-Metering Energy Usage
• Cost Allocation Applications
• Commercial Facilities
• Utility Substations
• Power Generation Applications
Product Applications
DM
SERIES
Monitors Accumulated Energy & Demand
Accumulated Energy & Demand Monitor
Key Features
nSingle Phase And/ Or
Three Phase Metering
nRevenue Accurate
Readings Of Bi-Directional
Energy, Power & Demand
nEasily Programmed for Any
CT or PT Ratio
nRS232 and RS485
Communications Available
nNonvolatile Memory
— No Battery Needed
n7 Digit Display
— No Multiplying Factor
nRugged Utility Grade
Design
nSuperbright LED Option for
Direct Sunlight Applications
Description
The DMWH 300 is a highly accurate,
low cost, bi-directional energy demand
meter. This utility grade, micropro-
cessor.based unit monitors kilowatts, kilo-
watt-hours and kilowatt demand in utility,
industrial and commercial applications.
When energy demand rises above expec-
tations, the DMWH 300’s control outputs
trigger to shed load or alarm.
Programmable Settings
DMWH 300 monitors can be pro-
grammed to handle any CT or PT ratio.
Their programming and reset features are
password protected.
Nonvolatile Memory
A nonvolatile serial EEPROM safely
stores the unit’s readings when it is pow-
ered down. There’s no need for a battery.
Analog Outputs
The unit offers a 0-1mA or 4-2omA ana-
log output for wattage readings. A Form C
KYZ pulse is also available for watt-hour
readings.
Digital Communication
Both RS232 and RS485 communications
are available. The unit uses an ASCII-
based protocol.
Alarm Limits & Relay
Outputs
The DMWH 300 offers set points and
Form C dry contact relays for over and
under wattage, both positive and negative.
Utility Grade Construction
With a rugged, utility-grade design, the
DMWH 300 is built to run flawlessly for
years. The device also e xceeds all IEEE
C37.90.1 surge withstanding standards.
Superbright Display
This unit is available in standard bright-
ness for indoor applications or superbright
for viewing in direct sunlight.
Electro Industries/GaugeTech
1800 Shames Drive • We s t b u r y, NY 11590
1- 8 7 7- E I M E T E R ( 1- 8 7 7- 3 46-3837) • E-Mail: s a l e s @ e l e c t r o i n d . c o m
Te l : 5 1 6 - 3 34-0870 • Web Site: w w w.electroind.com • Fa x : 5 16-3 3 8-4 7 4 1
E104722
Model Connection
DMWH 300
- - -
- - -
Example:
DMWH 300 3E
Option
Numbers:
3E
3 Element
Wye System
2.5E
2 .5 Element
Wye System
2E
2 Element
Delta System
120
120/208
G
277/480
Ordering Information
Specify a unit by writing its option numbers below. See sample. Specify your CT and PT ratio, Delta or Wye System.
If a specification is given, it will be preprogrammed in the factory.
Accessories
Operating
Voltage
Relay/Pulse
Option
Power
Labeling
KW
Kilowatts
MW
Megawatts
NL
2 Relays and
1 KYZ Pulse
NL120KW
Unicom 2500-F
Interface Converter
RS485 to RS232 to Fiber Converter.
Specifications
-
-
-
-
-
-
K110
Mounting Kit
Remote terminal block mounting kit with 36”
cable and mounting bracket.
SF232DB
RS232 Communication Adapter
Limited to a distance of 50 feet between the
central computer and the DMWH 300.
SF485DB
RS485 Multi-Drop, Daisy Chain
Communication Adapter
The maximum distance is 4000 feet between
the computer and DMWH 300.
SDFI-1 or SDFI-20
2 Channel Analog Outputs
SDFI-1 provides 0-1mA output. SDFI-20 pro-
vides 4-20mA output. Outputs can can be mapped
to any reading. Both channelsare bi-directional.
115A
120VAC
230A
230VAC±20%
D
24-48VDC
D2
125VAC or DC
Control
Power
115A
Display
Brightness
BRT
BRT
Super Bright
for Direct
Sunlight
Dimensions & Typical Wiring Information
3-PHASE, 4-WIRE WYEs with DIRECTVOLTAGEANDCTs 3-PHASE OPENDELTA
INPUT VOLTAGE RANGE
n150V Phase to Neutral (also used with PTs for extended
input range)
n300V Phase to Neutral, Up to 600V Phase to Phase
(Option G)
INPUT CURRENT RANGE
n10A Maximum
BURDEN
nVoltage: 0-1VA Maximum
nCurrent: 0.1VA Maximum
COMMUNICATION
FORMAT
n1 Start Bit, 8 Data Bits, 1 Stop Bit
nProgrammable from 1200 to 4800 Baud
ACCURACY
n0.4%, +1- Digit Resolution
nInstantaneous: 4 Digits
nTotal Energy: 6 Digits
nMeets ANSIC-12 1995
INPUT WITHSTANDING
nVoltage and Current: Continuous 200% Rated
nSurge:10x Rated Per 3 Seconds
nSurge Withstanding: Per IEEE C37.90.1
SENSING METHOD
nTrue RMS
FREQUENCY RANGE
nFundamental 45-75Hz
CONTROL POWER
n115V AC ±20%,6VA 47- 400Hz (Option 115A)
n230VAC ±20%, 6VA 47- 400Hz (Option 230A)
n24-48V DC ±20% 6VA (Option D)
n125V AC or DC ±20%, 6VA universal (Option D2)
OPERATING TEMPERATURE
n-20˚C to +70˚C
I/O ISOLATION
n2500V AC, 60Hz (minimum isolation between any input
and output)
UPDATE TIME
n1 Second
Note: Download manual from www.electroind.com to get additional wiring configurations.
+I009839
