Table of Contents
Advertisement
2.1
STANDARD FUNCTIONS FOR PILOT MDAR
(REL-300) VERSION 2.60
2.1.1
3 Step Distance Phase And Ground With
Independent Pilot Phase And Ground Zones
(Each Zone Has 4 Impedance Units)
(a)
Z1P/Z1G (zone-1 with selectable 0 to 15
cycles, in 1.0 cycle steps T1 timer),
(b)
Z2P/Z2G (zone-2 with separated phase and
ground timers, each timer can be disabled
independently),
(c)
Z3P/Z3G (zone-3, reversible directional with
separated phase and ground timers, each timer
can be disabled independently).
(d)
PLTP/PLTG (pilot zone).
2.1.2
Selectable instantaneous forward directional
overcurrent function for high Rf ground fault
supplement to overreach pilot, with adjust-
able 0-15 cycle timer in 1 cycle steps.
2.1.3
Selectable inverse time directional or non-
directional overcurrent ground backup (GB,
with similar CO-2, CO-5, CO-6, CO-7, CO-8,
CO-9 AND CO-11 characteristics).
2.1.4
Directional high-set instantaneous direct trip
including 3 phase and one ground overcur-
rent units (ITP/ITG) for SPT/3PT applica-
tions.
2.1.5
Instantaneous reverse directional overcurrent
ground function for carrier ground start on
blocking scheme.
2.1.6
Scheme selection:
(a)
Non-pilot 3-Zone distance.
(b)
Zone-1 extension.
(c)
Blocking.
(d)
PUTT (permissive underreach transfer trip).
(e)
POTT (permissive overreach transfer trip) and
Unblocking.
2.1.7
Additional/Unique functions:
(a)
Current and voltage change fault detectors (∆I,
∆V).
Section 2. FUNCTIONAL SPECIFICATION
(b)
Overcurrent supervision of phase and ground
distance units.
(c)
Loss-of-potential supervision (LOPB).
(d)
Loss-of-current monitoring (LOI).
(e)
Close-into-fault trip (CIFT) with LV-unit supervi-
sion.
(f)
(Unequal-pole-closing load pickup trip logic.
(g)
Selectable loss-of-load accelerated trip logic
(LLT).
(h)
Transient block logic for power reversal (TBM).
(i)
Weakfeed trip application.
(j)
Reclose block on breaker failure squelch.
(k)
Selectable Dual or Zero sequence voltage
polarizing, or Negative sequence quantities
operated directional element for ground unit
supervision.
(l)
Programmable reclosing initiation (RI) and
reclosing block outputs (RB); Reclose initiate
can be enabled with the selection of:
1PR — reclose on ØG faults
2PR — reclose on ØG/ØØ/ØØG faults
3PR — reclose on ØG/ØØ/ØØG/3Ø faults
(m) Continuous self-check function.
(n)
Fault locator function.
(o)
16 fault records storage with selectable capture
mode.
(p)
16 sets of oscillographic data with selectable
OSC data capture mode.
(q)
Line voltage, current and phase angle monitor.
(r)
Real time clock.
(s)
Breaker trip circuit test.
(t)
Push-to-close test for output contacts.
(u)
Software switches for functional tests (e.g. TK
and RS1).
I.L. 40-385.5
2-1
Advertisement
Table of Contents
