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13.7.5 Voltage differential protection VDCPTOV

Prepare the IED for verification of settings as outlined in section "Overview" and

section "Preparing for test" in this chapter.

13.7.5.1

Check of undervoltage levels

This test is relevant if the setting BlkDiffAtULow = Yes.

Check of

U1Low

Procedure

1. Connect voltages to the IED according to valid connection diagram and figure

63.

Apply voltage higher than the highest set value of UDTrip, U1Low and

U2Low to the U1 three-phase inputs and to one phase of the U2 inputs

according to figure

63.

The voltage differential

START signal is set.

1MRK 504 088-UEN C Section 13

Verifying settings by secondary injection

159

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General

Rated Frequency	50/60 Hz
Inputs	Analog and binary inputs
Application	Protection of power systems
Communication Protocols	IEC 61850, DNP3, Modbus
Operating Temperature Range	-25°C to +55°C
Mounting	Rack mounted
Number of Binary Inputs	Up to 48
Number of Binary Outputs	32
Protection Functions	Overcurrent Protection
Outputs	Binary outputs
Enclosure	IP 54
Type	Line Differential Protection
Number of Analog Inputs	24