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Model DWV Watt/VAR Transducer Operating Instructions
Safety precautions to be strictly observed are marked with
the following symbols in the Operating Instructions:
Contents
1. Read First and Then ................................................... 2
2. Brief Description .......................................................... 2
3. Technical Data ............................................................. 2
4. Mounting ..................................................................... 3
5. Electrical Connections ................................................. 3
6. Commissioning and Maintenance ............................... 4
7. Releasing the Transducer ........................................... 4
8. Dimensional Drawing .................................................. 4
9. Agency Approvals ....................................................... 8
1. Read First and Then ...
The proper and safe operation of the device
assumes that the Operating Instructions are
read carefully and the safety warnings given
in the various sections:
4. Mounting
5. Electrical connections
are observed.
The device should only be handled by appropriately trained
personnel who are familiar with it and authorized to work
in electrical installations.
2. Brief Description
The DWV Watt/VAR transducer converts active and reactive
power in a single-phase or three-phase AC system into an
output signal which is proportional to the measured value of
the active and reactive power into either a load independent
DC current or a load independent DC voltage.
3. Technical Data
Measuring Input
Measured Quantity:
Active and reactive power, unipolar or
bipolar (in 4 quadrants)
Nominal Frequency:
50 or 60 Hz, sine
Nominal Input Voltage: 100 to 690V
(85 - 230V with power supply from
measuring input)
Nominal Input Current: 1 to 6A
7004-00068-A Rev --
Measuring Output
DC Current:
Burden Voltage:
External Resistance:
DC Voltage:
External Resistance:
Response Time:
Power Supply
AC/DC Power Pack (DC or 50 - 60 Hz)
Rated Voltage
85 - 230V DC/AC
24 - 60V DC/AC
Power Consumption:
Options
Connected to the low
voltage terminal side:
Power supply from
measuring input
(self powered):
Please note the max. and min. measuring input voltage!
Accuracy (according to IEC 688)
Reference Value:
Basic Accuracy:
Safety
Pollution Degree:
Installation Category:
Environmental Conditions
Operating Temperature: -10 to +55°C
Storage Temperature:
Mean Annual Humidity: less than 75%
Page 2 of 8
0 - 1 to 0 - 20mA
0.2 - 1 to 4 - 20mA
± 1 to ± 20mA
± 15V
1mA: 15k ohms
4 - 20mA: 750 ohms
0 - 1 to 0 - 10V
0.2 - 1 to 2 - 10V
± 1 to ± 10V
5Vdc: 2.5k ohms
10Vdc: 5k ohms
less than 500ms
Tolerance
DC: -15 to +33%
AC: ±15%
7.0VA
24VAC or 24 - 60VDC
85 - 230VAC ± 15%
Output end value
0.5% F.S.
2
III
-40 to +70°C
5/7/10
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