Products and services

Protection and control, Automation, Data acquisition

Protection and control platform (By relay application)

Transformer Protection


The ALP series covers differential protection and accounts for current transformer errors by providing a two slope differential setting characteristic. The events of transformer ultrasaturation during inrush and very low second harmonic content are properly covered by the unique SECURE blocking algorithm.

  • Application for up to six winding transformers
  • DNP3 and IEC61850 GOOSE communication
  • Cybersecure to help meet NERC CIP requirements

Hardware configurations

  • ALP-2000 : Combination of twelve (12) current and voltage inputs, six (6) digital inputs, four (4) relay outputs, two (2) high-speed power outputs, up to four (4) fiber Ethernet ports


  • ALP-4000: Combination of twenty-four (24) current and voltage inputs in a single device, sixteen (16) digital inputs, sixteen (16) relay outputs, eight (8) high-speed power outputs, up to four (4) fiber Ethernet ports

Main characteristics and advantages:

  • Includes ANSI functions 24, 27, 50, 50N, 51, 51N, 59, 67, 81, 81R, 87T and LOV
  • Platform built with the most cutting-edge technologies, resulting in very high processing and storage capacities
  • SECURE blocking adapted to ultrasaturation phenomenon of modern transformers
  • Fast transformer differential restrained action as low as 1,4 cycle to keep your transformer safe and avoid false tripping under magnetization current
  • Better precision of analog readings
  • One of the highest sampling rate in the industry, enabling precise recording and analysis of faults
  • Secure, rugged and reliable protection relay, in compliance with the latest utility standards
  • Protection, automation, metering and monitoring functions built into a single product
  • User-friendly interfaces and software for easy engineering, configuration, commissioning and operation
  • Scalable solution for the detection and treatment of non-conventional electrical phenomena
  • Up to six winding transformers
  • Secured WEB server for easy and safe access to the relay settings, real-time measurements and oscillography recordings.