ELR-4MA AC Earth Leakage Relay

Information

Blue Jay ELR-4MA is a compact DIN rail-mounted AC earth leakage relay certified to IEC 60755 Type A standard. Paired with zero-sequence current transformers (ZCT), it continuously monitors AC and pulsating DC residual leakage currents in AC power systems. It features a backlit LCD real-time display, isolated universal 85–265V AC/DC power supply, and a full adjustable leakage range from 5mA up to 3A with configurable trip delay of 50ms–10s. Its slim 35mm DIN form factor fits standard electrical cabinets for new build and retrofit projects. This AC earth leakage relay provides dual-stage pre-alarm and fault alarm with hold function that locks alert signals until manual reset. It offers independent safety trip and alarm relay outputs, plus remote test/reset digital inputs for on-site maintenance. Built-in isolated RS485 Modbus-RTU communication enables seamless data upload to SCADA and PLC control systems. Widely deployed in EV charging stations, industrial AC panels, motor control centers and commercial distribution networks, it detects early insulation breakdown to prevent electric shock, equipment burnout and electrical fire hazards.
Chongqing Blue Jay Technology Co., LtdZ3.H18Blue Jay is a professional Chinese local industrial power and energy meter manufacturer with over 10 years of experience. We hold full capabilities in industrial power and energy meter manufacture, which supports us in offering you a one-stop solution for OEM/ODM customers. Many times, we are not only manufacturing for you but also supporting your design according to your final applications. Our capabilities include manufacturing and designing power and energy meter solutions. We also can manufacture a variety of protection relays such as motor protection relays, arc flash relays, DC insulation monitoring relays, partial discharge monitoring, earth leakage relays, current transformers, hall effect sensors, and much more. We can manufacture power energy meters & protection relay according to your design. We also can design circuits, functions, UI, and packaging, and manufacture the final products as per your requirements. Our company introduces advanced management concepts and scientific management models, implements ISO9001 international quality standards, s and adapts home and abroad advanced R&D, production, and testing equipment. As an ISO 9001-certified power meter and protection relay company, Blue Jay controls quality from CE, RoHS, and after-sales. In many cases, we can also support you to optimize designs which can reduce cost and the risk of failure on real applications. Blue Jay offers very competitive prices because we have the leverage of high volume production, 2 factories with over 20, 000 m2 area, and China's low production cost. Until now, our products have been trusted by 1000+ Clients from Russia, India, Iran, Thailand, Korea, Malaysia, Sudan and South America, Guyana, and other countries. In one word, Blue Jay is a customer-oriented enterprise that offers you a one-stop energy meter and protection relay solution at a competitive price. Just send us an inquiry for further discussion.

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