Description
概观
Essential details:560CVT10 CT/VT Interface 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)
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560CVT10Â CT/VT Interface Current/Voltage Transducer Interface
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.
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