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The following features are standard for the Non-Pilot MDAR V2.00:
• 3-Zone distance phase and ground relay, with re-
versible Zone 3 phase and ground; 4 impedance
units per zone: 3 phase-to-ground; 1 phase-to-
phase.
• Selectable Zone 1 extension
• • T1 timer (0 or 2 cycles)
• Independent timers for phase and ground (T2G,
T2P, T3G/T3P)
• • Block selection for T2 and T3 timers
• Inverse time directional or non-directional (select-
able) overcurrent ground backup logic
• Loss of potential supervision (LOP)
• Loss of current monitoring (LOI)
• Overcurrent supervision
• Instantaneous forward directional phase and
ground highset overcurrent trip (ITP and ITG)
• Close Into Fault Trip (CIFT)
• • Stub Bus Protection (89b)
• Unequal-pole-closing load pickup logic
• • Selectable Loss-of-Load accelerated trip logic
(LLT)...setting (YES/NO/FDOG)
• Current change fault detector (∆I)
• Voltage change fault detector (∆V)
• Last Fault LED now blinks once for a single fault
and twice for more than one fault. When the RE-
SET button is depressed, the flashing LED is re-
set, and the displayed data is returned to the
green LED (i.e., Volts/Amps/Angle...metering
mode). MDAR fault data cannot be cleared out of
memory from the front panel. Fault data can be
re-accessed by moving the LED down to the Last
Fault or Previous Fault.
• Line voltage, current and phase angle monitor.
• • Selectable polarizing for directional O/C ground
units (ZSEQ/NSEQ/DUAL)
• Programmable Reclose initiation and reclose
block (RB) outputs; Reclose Initiate (RI2) can be
NOTE: The foregoing (and following) features preceded by two dots (• •) were not included in V1.65.
(5/92)
Features Included in Version V2.00
iii
enabled with the selection of:
– 1PR for φG fault
– 2PR for φG or φφ fault
– 3PR for φG or φφ fault or 3φ fault
• Digital Processing
• Fault locator software
• Self-checking software shows error codes
• Breaker trip circuit test
• • Push-to-close test for output contacts
• Software switches for functional tests, e.g., TK
(Carry Send Switch), RS1, RS2 and RS12 (Carry
Receivers).
• • Trip contact sealed in by trip current; and select-
able dropout delay timer, 0/50, (YES/NO)
• • 16 fault records (triggered by TRIP, Z2PU or
Z2Z3)
• Real-time clock
• Low voltage pickup setting (LV) for weakfeed log-
ic and CIF trip; selection can be made from 40
Vrms to 60 Vrms, in 1-volt steps.
• Setting of ZR, range from 0.1 to 7.0
• Setting of XPUD, range from 0.3 to 1.5 per mile or
per km
• Setting of FDAT (trip, Z2 trip or Z2Z3 trip)
• Logic for load restrictions
• The reaches of Z1E are based on Zone 1 settings
multiplied by a factor of 1.25 (e.g., 1.25 x Z1P and
1.25 x Z1G).
I.L. 40-385.1B
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