The iXP-420 is a full-featured relay suitable for a variety of protection applications especially for two-winding transformer protection, monitoring, and monitoring and control.
Highlights
Add new functions and features using IDEA Workbench™ Custom Modules
Selectable transformer winding configuration
Multi-feeder frequency load shedding and restoration logic
Selective tripping of both high and low side breakers
Breaker health monitoring for both controlled breakers
Virtual Test Set™ event record simulator
Relay Replay™: The "what-if" analysis tool
Protection Features
Two levels of over-excitation (V/Hz) protection (24)
Under- and over-voltage (27/59)
Fuse-fail detection (27FF)
Phase overcurrent (50/51) for each winding
Residual overcurrent for each winding (50R/51R)
Ground overcurrent with separate CT input for low side winding (50N/51N)
Negative-sequence overcurrent (50Q/51Q) for each winding
Breaker fail-to-trip and fail-to close for both breakers
Sequence overvoltage (59P, 59Q, 59N) and positive sequence undervoltage (27P)
Multiple-Step over/under frequency elements with voltage and current supervision (81)
Differential protection element (87-1) with dual slope bias characteristic and adjustable knee-point
High set differential element (87-2) for fast response to large magnitude internal faults
Adjustable 2nd and 5th harmonic restraint on the main differential element
Restricted earth fault (87N).Two levels of over-excitation (V/Hz) protection (24)
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