The ALP series prevents islanding from occurring by combining a series of overvoltage, undervoltage, overfrequency, underfrequency and rate of change of frequency (ROCOF) functions.
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 27, 50, 50N, 51, 51N, 59, 67, 81, 81R and LOV
Programmable logic
DNP3 and IEC61850 GOOSE communication
Cybersecure to help meet NERC CIP requirements
Secured WEB server for easy and safe access to the relay settings, real-time measurements and oscillography recordings.