Ampcontrol CSM Pty Ltd - ABN 35 000 770 141
ECD User Manual
ECDB005R0 13/03/2020 13:12 Page 6 of 21
1.2 Intrinsic Safety Considerations
• The ECD relay’s IS Pilot Terminal is protected by an internal IS barrier. In the event of a phase to pilot fault, this barrier
will clamp the voltage at the pilot terminal to a safe level and protect the relay from damage. However this barrier can
only withstand 5.25A for 1s. The ECD relay must, therefore, be installed in a system with earth fault current limitation
of 5A or less and an earth fault clearance time of less than 1s. Alternatively a 3A external fuse rated to system voltage
can be installed between the relay’s pilot terminal and the pilot conductor.
• The ECD relay must be located in a non-hazardous (safe) area.
• The ECD IS earth connection is critical to the IS protection and must be infallibly connected to the system earth. This
must be done with a minimum of 3 conductors, each of 1.5mm
2
as per the IS installation standards.
• The installation is to be in accordance with the relevant installation Standards/Codes of Practice.
• There are no user-replaceable or user-adjustable parts in the ECD system’s components.
DO NOT OPEN the ECD enclosure. Return to Ampcontrol for service & repair.
To Next Page
Loading...
