Application Note – Earth Leakage Relay Power Up Trip

Ampcontrol has recently been made aware of a condition that causes the ELD V3 and ELV V2 relays to power up into a tripped state. The trip is related to the internal charge of the super-capacitor. The issue may cause delayed power up of equipment as a reset will be required if a trip occurs.

The cause of this trip is not a safety concern nor will it pose any risks to operations experiencing this condition. The trip was detected during the commissioning stage where the equipment was undergoing repetitive power cycles.

Case Study – Ampcontrol Hire Fleet: Powering Sydney’s WestConnex

Utilising its extensive hire fleet, Ampcontrol is helping to ease congestion and connect communities by powering Sydney’s WestConnex, the largest transport infrastructure project in Australia.

Ampcontrol undertook the design, supply and commissioning of a complete electrical system from Ausgrid’s 11kV point of supply, to surface and underground facilities across the new M4 WestConnex tunnelling sites.

Design, Auditing, Testing and Analysis

Protection system analysis, HV condition and compliance audits and reporting, Earth grid testing, Power quality, harmonic and energy analysis, Fibre network testing. Ampcontrol’s highly qualified, certified and skilled engineering teams provide a comprehensive range of testing, analysis, auditing and reporting for customers to ensure their operations are compliant and working at optimal levels.

HV Installations, Repairs, Maintenance and Upgrades

Ampcontrol’s service team can provide 24/7 onsite support for high voltage installations, maintenance, repairs and upgrades. This service is delivered by our fully qualified High Voltage service
group, backed by a team of electrical engineers who have the experience and expertise to ensure safe, compliant and on time completion of your high voltage infrastructure maintenance and project activities.

Modular Electrical Switchrooms

Ampcontrol’s modular electrical switchrooms are custom built to suit any industrial, mining and utility power distribution applications.
Ampcontrol have supplied modular switchrooms to every industry and environment in Australia including open cut mines, network substations, infrastructure projects and processing operations.

Modular Substations

Customised footprint design for switchroom, switchyard and transformer installations. Ampcontrol’s modular substations are a proven and viable alternative to building concrete, brick and mortar substations. The modular design suits applications such as zone and radial substations. These modular substations are designed, manufactured, assembled, wired and operationally tested in our workshop before being shipped as a packaged system ready for assembly on site.

Neutral Earthing Resistor (NER)

Ampcontrol’s neutral earthing resistors (NERs) protect vital equipment such as switchgear, generators and transformers from damage in the event of faults in AC distribution systems.