It has been identified that some customers are experiencing failures of the 4-20mA circuit in our discrete EL relays. The fault has no impact on the relay’s trip function capability, which remains fully functional as designed. The fault is unveiled as an incorrect 4-20mA output regulation. The 4-20mA output is provided for remote monitoring of the effective EL current being detected by the relay.
Ampcontrol has received reports of a customer experiencing nuisance EFLO trips on new IPD 11kV EFLO equipment. Upon inspection of hardware and investigation, Ampcontrol was able to identify that the environmental conditions subjected to the hardware as the root cause of the nuisance tripping.
The ELV-PRO relay is a successor to the VSD-Guard, a premium Earth Leakage Relay providing users with a greater visibility and insight into the earth leakage currents within their system. In recent months a number of concerns have been raised regarding the relay experiencing nuisance tripping. The concerns identified with the product do not prevent the ELV-PRO detecting Earth Leakage faults; rather users may experience nuisance tripping. The relay does not present a safety risk with all trips / failures resulting in a safe failure condition.
The function of the earth continuity system is to enable SAFE and RELIABLE operation of reticulated mining equipment by ensuring the presence of an adequate earth connection. Earth continuity is typically required in applications where there is a fundamental reliance on the earth return impedance for the electrical safety of the operating equipment.
The iMAC EMM Module is an Intrinsically Safe Relay output module for the iMAC System. The iMAC EMM monitors the unique ‘Signal Line Healthy’ signal from the iMAC EOL (End of Line) Module to provide an alternative control relay (CR) output for the iMAC System.
The iMAC GRM Module is an Intrinsically Safe General Relay output module for the iMAC System. The module responds to iMAC Address 0 data and can be configured to operate off any bit (0-7) via a rotary switch located under the front fascia. There are three GRM variants to suit 24VDC, 110VAC, or 240VAC power supplies.
The iMAC CRM Module is an Intrinsically Safe Control Relay output module for the iMAC System. The iMAC CRM provides remote mirroring of the iMAC Controller’s Control Relay (CR). There are three CRM variants to suit 24VDC, 110VAC, or 240VAC power supplies.
The iMAC ARM Module is an Intrinsically Safe Auxiliary Relay output module for the iMAC System. The iMAC ARM provides remote mirroring of the iMAC Controller’s Auxiliary Relay (AR). There are three ARM variants to suit 24VDC, 110VAC, or 240VAC power supplies.
IPD to OCS protection system feature differences.
During the lifespan of the IPC Integrated Protection Relay, several key materials that are required to manufacture the products within the IPC family have been made obsolete by their respective manufacturers. As a result, Ampcontrol has been forced to withdraw the IPC range.