Ampcontrol ECD - Commissioning and Calibration; Earth Continuity Test (Series Resistance); Earth Continuity Test (Shunt Resistance); Remote Start Function Test

Ampcontrol CSM Pty Ltd - ABN 35 000 770 141
ECD User Manual
Rev 3 – March 2020
ECDB005R0 13/03/2020 13:12 Page 14 of 21
5 COMMISSIONING AND CALIBRATION
Prior to being put into service, the electrical protection system must be correctly commissioned. This manual does not cover
system commissioning; the full scope of commissioning tests should be determined during the risk assessment or FMEA
covering the design of the electrical protection system.
The following test can provide guidance on checking the correct operation of the ECD during commissioning. This is not
intended to provide an exhaustive commissioning checklist, but should be considered to be a minimum set of tests.
The Earth Continuity function performs two measurements to ensure the integrity of the pilot-earth loop; Series resistance
measurement and shunt resistance measurement.
5.1 Earth Continuity Test – Series Resistance
The series resistance measurement can be verified by installing a resistor which is a minimum of 3Ω above the selected trip
level, or creating an open circuit, in series with the pilot conductor and verifying that the ECD relay trips within the selected trip
time and indicates an open circuit fault.
5.2 Earth Continuity Test – Shunt Resistance
The shunt resistance measurement can be verified by installing a resistor which is 1kΩ or less, or creating a short circuit,
between the pilot conductor and earth, and verifying that the ECD relay trips within the selected trip time and indicates a short
circuit fault.
5.3 Remote Start Function
The remote start function can be verified by repeating the two previous tests in the remote start mode with the remote start
resistor installed.