560CVT10  Current/Voltage Transducer Interface

The Current/Voltage Transducer Interface (CT/VT interface) is used for measuring analog AC input signals from three independent
phases with 3 or 4 wire connections. For each phase voltage, current and power are
measured directly, and a number of other parameters derived from these in software. The results are transmitted to the RTU560.
There are several versions available:
Auxiliary Voltage (LO):
ƒ 3 current-, 3 voltage inputs (In 1A)
ƒ 3 current-, 3 voltage inputs (In 5A)
ƒ 4 current-, 4 voltage inputs (In 1A)
ƒ 4 current-, 4 voltage inputs (In 5A)
Auxiliary Voltage (HI):
ƒ 4 current-, 4 voltage inputs (In 1A)
ƒ 4 current-, 4 voltage inputs (In 5A)

560CVT10

The CT/VT interface is a microprocessorbased Intelligent Electronic Device (IED) intended for current, voltage, power and energy measurement.
Distorted input waveforms with harmonics to
the 15th are therefore detected accurately.
Additional functionality to provide functions
as fault current detection, minimum and
maximum logging and analog high and low
limit supervision is available.
The fault current is measured up to 20 times
nominal current. Therefore the current inputs
withstand 50 times nominal current for 1 s.
The CT/VT interface is equipped with one binary
output which can be used to indicate e.g. alarm
for over current.
All CT/VT interfaces are mounted in the RTU cabinet. Current and voltage inputs are connected via
transformer only (see Figure 1).
The CT/VT interfaces are designed for mounting
on DIN rails 35 mm.