Rel301/302 Features; Standard Features For Rel301 (Non-Pilot) - ABB REL 301 Instruction Leaflet

I.L. 40-386.4
1. 2.

REL301/302 FEATURES

Standard Features for REL301 (Non-Pilot)

1.2.1
• 100% Numerical processing
• 3-Zone distance phase and ground relay, with reversible Zone-3 phase and ground; 4 imped-
ance units per zone: 3 phase-to-ground; 1 phase-to-phase.
• T1 timer (0 to 15 cycles)
• Independent timers for phase and ground step distance applications
• Overcurrent supervision of phase and ground distance
• Selectable Zone-2 torque controlled phase and/or ground overcurrent
• Inverse time directional or non-directional (selectable) overcurrent ground backup logic
• Loss of potential supervision
• Loss of current supervision
• Instantaneous forward directional phase and ground high set overcurrent trip
• Close Into Fault Trip
• Unequal-pole-closing load pickup logic
• Selectable Loss-of-Load accelerated trip logic
• Selectable Zone-1 extension
• Current change fault detector (∆I)
• Voltage change fault detector (∆V)
• Breaker trip circuit test
• Push-to-close test for output contacts
• Binary input test of contact input circuits
• One input (52a) which can be used with programmable logic (see Optional Features below)
• Software switches for functional tests, e.g., (Carrier Send and Carrier Receivers)
• Selectable polarizing for directional overcurrent ground units (zero sequence, negative se-
quence and dual
• Programmable Reclose initiation and reclose block outputs
• Fault location capability
• Self-checking software
• Trip contact sealed in by trip current, and selectable dropout delay of 0 or 50 ms
• 16 fault records with setting selectable data capture choices which trigger fault recording
• Real-time clock (Can be externally set with optional IRIG-B interface)
• Low voltage pickup setting for close into fault trip logic
• Setting positive sequence to zero sequence ratio
• Double blinder logic for out of step blocking
• Choice of RS (RS 232C Product Operated Network Interface) PONI or NET (INCOM) PONI
• 16 sets of oscillographic data and intermediate target data. Each set includes a graphic dis-
play of the 7 analog inputs and 24 digital logic signals. Each oscillographic target contains 1
prefault and 7 fault cycles of data. Data collection can be started by TRIP only, TRIP and/or
Zone2, TRIP and/or Zone 2/ Zone 3 or ∆V ∆I
1-2