ALPS is a multi-function digital protective relay system intended to provide distance protection for HV or EHV transmission lines. It may be applied on or adjacent to series compensated lines. It is available for single or three phase tripping applications. Typical operating times are to 1 cycle.

• Distance protection for EHV lines
• Series compensated lines
• High speed tripping (half cycle)

• Four zones of distance protection
• Pilot protection, step distance backup
• Out of step blocking and tripping
• Phase instantaneous overcurrent
• Ground instantaneous overcurrent
• Ground time overcurrent backup
• Over and under voltage functions
• Optional four shot recloser
• Configurable inputs and outputs

• Integrated metering
• Fault location
• Event reporting of last 100 events
• Fault reports
• High resolution oscillography

• LCD display and keypad
• RS232 and RS485 serial ports
• ASCII or GE protocols