ABB REL300 Instruction Manual page 6

I.L. 40-385.7
The following features are standard for the Pilot REL300 V2.71:
• All features listed as standard for the Non-Pilot
REL300 V2.70 are included in the Pilot system
• Independent pilot phase and ground distance
units
• Complete Logic and Channel Interface for:
– Permissive Overreach Transfer Trip (POTT) /
Simplified Unblocking
– Permissive Underreach Transfer Trip (PUTT)
– Directional Comparison Blocking Scheme
(BLK)
– POTT or Simplified Unblocking Weakfeed
The following features are optional for the Non-Pilot and the Pilot REL300 V2.71
• Choice of rear communications port options:
RS232C W/IRIG B PORT/PONI
RS232C/PONI or
®
INCOM /PONI
• Optional graphic software program (OSCAR).
Significant Changes to Version 2.71 (From V2.70)
1. Changed 3V0 from 3 volt to 1 volt for the direc-
tional units in order to increase the sensitivity for
Zone-2 and Zone 3 applications.
2. Changed the FDOG pickup angles, 3I0 leading
3V0 between 75 and 255 degrees to overcome
the phase shift due to the connection of ground
resistors.
3. Changed the RDOG timer from 16/0 to 33/0 ms.
For a 3-phase fault at 0% location, the RDOG
may pickup momentarily and may start the TBM
(Carrier keying); therefore, it may delay the pilot
trip action.
NOTE: for the pilot application, the setting of
FDGT must be equal to or greater than 3 cycles.
4. Changed the LOIB timer from 0.5/0.5 to 10/0.5
seconds in order to prevent the block of Z2G,
Features Included in Version V2.71
Features Included in Version V2.71
vii
• Instantaneous Forward Directional Overcurrent
Function for High Resistance Ground Fault
Supplement to Overreach Pilot, with adjustable
timer (from 0 to 15) in 1 cycle steps or Block
• Instantaneous Reverse Directional Overcurrent
Ground Function
– Carrier Ground Start on Blocking Scheme
– Weakfeed System Application
• Reclose Block on Breaker Failure (BF) Squelch
• 3-Terminal Line Application
• Weakfeed Trip
• Built-in FT-14 test switches
• Optional Programmable Output Contacts. Eight
additional contacts chosen from 30 functions.
• Single-Pole-Trip (SPT) logic and outputs: Consult
Factory
Z3G and GB tripping if the settings of T2G and/or
T3G are greater than 0.5 seconds.
5. Changed the LOPB logic by removing the lead
between LOP (8/0) and AND1G.
6. Corrected the angle display for the 1-amp ct ap-
plication. Now, the angle display is extended from
50% to 10% of the ct rating.
7. Removed the GS control function and remove
LOP and LOI from Alarm-1. Reassigned the GS
contact as LOP or LOI alarm (AL-3).
8. Extended the setting range of XPUD from 0.300 -
1.500 to 0.050 - 1.500 settings.
9. Reduced the pickup and dropout timing errors of
the PCO-4 and PCO-8 timers and limited the tol-
erance within 1 cycle of the setting values.