DU96 : 28-09-2012
4
3
DUAL PARAMETER METER
For W, VAR, VA & PF
MODEL : DU-96
User Manual
®
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6
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Introduction & Safety Recommendations
03
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Technical Specifications
04-05
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Processing Method
06-07
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Mechanical Dimensions
08
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Connection Diagrams
09
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Display Indication
10
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Model Description
11-13
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General Warranty Certificate
16
Introduction
DU96 3 phase 3 element 4 Wire Meter is microcontroller based
electrical analyzer indicating TRMS value of electrical parameters. It
is a available with two parameters amongst W-VA-VAR-PF in six
different combination. It has 2 rows of LED display of 4 digit each.
It has factory set function such as CT Ratio, PT Ratio it should be
mentioned in ordering information.
Safety Recomendations
To guarantee the level of safety incorporated in the device, follow
the instructions below :
1) Adhere strictly to the connection diagrams for the installation
of the instrument.
2) Before gaining access to the terminal, ensure that the conductors
to be connected to the instrument are not live.
3) Make sure that the electrical panel in which the instrument is to
be placed is designed in such a way as to guarantee that the
terminals are inaccessible after installation.
Technical Specifications
Display
: 2 groups of 4 digit LED display
height 14.2mm / 0.56”
Measuring Interval : 0.5 sec
Operating Temp.,
: 0°C to 50°C
Humidity
: <90% RH. (Non Condensing)
Dimension (mm)
: Front 96 x 96 mm
Depth 90 mm
Panel Cutout 92 x 92 mm
Weight
: 490 gms.
Electrical Specifications
System
: 3 Phase 3 Element 4 Wire
Auxiliary Power Supply :
Nominal (Range)
: 230V AC (185~264VAC)
110V AC (90~126VAC) optional
Frequency
: 50Hz
Burden
: < 5 VA
Voltage Input
:
Nominal
: 230V / 240V AC (Phase - Neutral)
Measurement
400V / 440V AC (Phase - Phase)
Max. Range
: 300V AC (Phase - Neutral)
520V AC (Phase - Phase)
Burden
: < 0.1 VA / Phase
Accuracy Range
: 50 ~ 300V (max.) Phase to Neutral
PT Ratio
: Use PT for higher input ranges. PT Ratio
Fully Programmable (1.000 ~ 9999)
(factory set)
Current Input
:
Nominal Measurement : 5A AC (internally isolated)
1A AC (against specific order)
Max. Range
: 0 ~ 6VAC
Burden
: < 0.5VA / Phase
Max. Overload Current : 200% for 1 sec. (10A max.)
Accuracy Range
: 20 ~ 120%
CT Ratio
: Use CT for Measurements above 5 Amps.
Fully Programmable (1.000 ~ 9999)
(factory set)
Accuracy :
Active Power *
: ± 0.5% of Full Scale + 5 dgt
Reactive Power *
: ± 0.5% of Full Scale + 5 dgt
Apparent Power *
: ± 0.5% of Full Scale + 5 dgt
Power Factor
: ± 1° Electrical
* Note :
Watt, VAR, VA Accuracy at Power factor 0.3 Lag - Unity - 0.3 Lead
Processing method
a) Phase Values :
Effective phase voltage
Effective phase current
Active phase power
Apparent phase power
Reactive phase power
Phase power Factor
V
n
(TRMS) =
[
V
n
(
i
)
]
2
N
S
i=1
N
I
n
(TRMS) =
[
I
n
(
i
)
]
2
N
S
i=1
N
P
n
=
V
n
(
i
)I
n
(
i
)
N
S
i=1
N
S
n
= V
n
(TRMS)
X
I
n
(TRMS)
Q
n
=
S
n
2
- P
n
2
PF
n
=
P
n
S
n
