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RTU560
Data Sheet CT/VT Interface 560CVT10
Doc-No.: 1KGT 150 623 V001 1 1
CT/VT Interface 560CVT10
Application
The Current/Voltage Transducer Interface(CT/VT interface) is
used for measuring ana-log AC input signals from three
independentphases with 3 or 4 wire connections. Foreach phase
voltage, current and power aremeasured directly, and a number of
other pa-rameters derived from these in software. Theresults are
transmitted to the RTU560.
There are several versions available:
Auxiliary Voltage (LO):3 current-, 3 voltage inputs (In1A)3
current-, 3 voltage inputs (In5A)4 current-, 4 voltage inputs
(In1A)4 current-, 4 voltage inputs (In5A)
Auxiliary Voltage (HI):4 current-, 4 voltage inputs (In1A)4
current-, 4 voltage inputs (In5A)
Characteristics
The CT/VT interface is a microprocessor-based Intelligent
Electronic Device (IED) in-tended for current, voltage, power and
en-ergy measurement.Distorted input waveforms with harmonics tothe
15th are therefore detected accurately.
Additional functionality to provide functionsas fault current
detection, minimum andmaximum logging and analog high and lowlimit
supervision is available.
The fault current is measured up to 20 timesnominal current.
Therefore the current inputswithstand 50 times nominal current for
1 s.
The CT/VT interface is equipped with one binaryoutput which can
be used to indicate e.g. alarmfor over current.
All CT/VT interfaces are mounted in the RTU cabi-net. Current
and voltage inputs are connected viatransformer only (see Figure
1).
The CT/VT interfaces are designed for mountingon DIN rails 35
mm.
Meter OperationThe following metered parameters are
available:
Instantaneous Meter Values
Measured by true RMS conversion and transmis-sion to the RTU560
of following values:
Phase - Neutral Voltage 1N, 2N, 3N, Average
Phase -Phase Voltage 1-2, 2-3, 3-1, Average
Current Phase 1, 2, 3
Fault Current Phase 1, 2, 3, N
Active Power, Phase 1, 2, 3, Total
Reactive Power, Phase 1, 2, 3, Total
Apparent Power, Phase 1, 2, 3, Total
Power Factor, Phase 1, 2, 3, Average
Frequency,
Phase Rotation
Voltage / Current Harmonic Distortion (THD,
current and voltage phase 1,2 and 3)
Derived Meter Values
calculation of Active, Apparent and ReactiveEnergy accumulated
values (intermediate andend of period readings, delivery and
con-sumption)
calculation of Ampere Hours accumulatedvalues (intermediate and
end of period read-ings, delivery and consumption)
Neutral current (with 3 wire connection)
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RTU560
Data Sheet CT/VT Interface 560CVT10
2 Doc.-No.: 1KGT 150 623 V001 1
Functionalities
With a powerful diagnostic tool the operator
is able to fulfil below described tasks. As op-tion the related
date can be transferred overthe communication link to the RTU and
thecontrol system.
Communications over RS485 port withModbus RTU Protocol
User Mapping to speed up communica-tion
Logging of Minimum and Maximum Val-ues
Event Logging
Trend logging (option)
Waveform Capturing and phaseranalysis:
Harmonic analysis for power quality analysis(up to 15th
harmonic):
Relay output for configurable alarm
Configurable alarms for over voltage, overfrequency, over
current and so on
Fault current detection (Option)
- configurable flexcurve for overcurrentalarm (in the same as
IEC, ANSI curves)
-
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RTU560Data Sheet CT/VT Interface 560CVT10
Doc-No.: 1KGT 150 623 V001 1 5
Mechanical Layout
Width 134.8 mm
Height 70.3 mm
Depth 149.5 mm
Height 70.3 mm
Enclosure for DIN Rail 35 mm
Environmental Conditions
Operating Tempera-ture
-25 to +60 C
Storage Temperature -40 to +80 C
Relativehumidity
10 95 %non condensing
Ordering in formation
560CVT10 R00011In = 1A, 3 voltage, 3current, Version LO
1KGT 018900R0011
560CVT10 R00015In = 5A, 3 voltage, 3current, Version LO
1KGT 018900R0015
560 CVT10 R0021In= 1A, 4 voltage, 4current, Version LO
1KGT 018900R0021
560 CVT10 R0025In= 5A, 4 voltage, 4current, Version LO
1KGT 018900R0025
560 CVT10 R0041In= 1A, 4 voltage, 4current, Version HI
1KGT 018900R0041
560 CVT10 R0045In= 5A, 4 voltage, 4current, Version HI
1KGT 018900R0045
