POWER ELECTRONICS
VS65
ANNEXE A. POWER CABINET OPERATION
43
Multi-function Visualization
Parameters Setting of Multi-function Visualization.
Nº Parameter Description Value Remark
01 In.Pt Voltage ratio 60 Fixed value
02 In.Ct Current ratio 60 Fixed value
03 In.U Secondary Voltage 100V Fixed value
04 In.I Secondary Current 5A Fixed value
Note: The value is only for reference
Since the voltage ratio of the internal voltage transformer is 6000:100 and the current ratio of the
internal current transformer is 300:5, so the primary voltage is 0 - 6000V and then the measured
secondary voltage range is 0 -100V, the primary current is 0 - 300A and then the measured
secondary current range is 0 - 5A.
Note: Normally, all parameters of multi-function visualization are not allowed to be modified by the user
unless the internal hardware is replaced.
General Protections
This device is used to protect asynchronous motors. For further information, please, refer to
section 8.2.1.
8.2.1. SNP-2371 Asynchronous Motor Protection & Control Unit
The application of SNP-2371 is mainly used for the protection of asynchronous motor at less than
the rated 10kV voltage.
Function and Characteristics
1. Protection function
o Instantaneous over-current (short circuit current and rotor locked current)
o Phase current imbalance (phase loss and phase current imbalance)
o Overload
o Over voltage
o Low voltage
o Zero sequence over current protection ( trip or warn is selectable)
o Zero sequence over voltage protection ( trip or warn is selectable)
o Overheat
2. Assistant Function
o PT (Voltage transformer loop) breaking
o Control loop breaking
o Device fault alarming
o Fault history
o Self-diagnosis
3. Measure and control function
o Measure item: voltage, current, active power, reactive power, power factor, frequency.
o Input: 14 digital inputs
o Control function: controlling one breaker at local or remote.
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