Setting Ranges; Ground/ Phase Overcurrents And Undervoltage Units - ABB REL300 Instruction Manual

2.6

SETTING RANGES

Phase and Ground Distance (Zone 1, 2, 3):
• 0.01-50 ohms in 0.01 ohm steps for 5 A (ct)
• 0.05-250 ohms in 0.05 ohm steps for 1 A (ct)
Zone Timers - Separate timers for phase and ground:
• Zone 1 (0 to 15 cycles in 1 cycle steps)
• Zone 2 (0.10 to 2.99 seconds in 0.01 second steps, Block)
• Zone 3 (0.10 to 9.99 seconds in 0.01 second steps, Block)
Forward Directional Ground Timer (FDGT)
• 0 to 15 cycles in 1 cycle steps, Block
Ohms per Unit Distance:
• 0.050 - 1.500 in 0.001/DTYP (Km or Mi)
Inverse Time Overcurrent Ground Relay:
• Pickup (0.1-0.8) in 0.1 A increments for 1 A (ct)
• Pickup (0.5-4.0) in 0.5 A increments for 5A (ct). Choice of 7 time-curve families (CO-2, 5, 6,
7, 8, 9, 11 Characteristics), 63 time curves per family. (See Figures 2-1 thru 2-7.)
• Set for directional or non-directional operation.
High set instantaneous directional overcurrent trip units - phase and ground (I
• 2.0-150 in 0.5 A steps for 5 A (ct)
• 0.4-30 in 0.1 A steps for 1 A (ct)
2.7

GROUND/ PHASE OVERCURRENTS AND UNDERVOLTAGE UNITS

• Undervoltage level units (LVA, LVB, LVC and CIF) for weakfeed and close-into-fault, from 40
to 60 Vrms in 1-volt steps
• Current Units (IAL, IBL, ICL, IOS, IOM & IM)
0.5 - 10 in 0.1 A steps for 5 A (ct)
0.1 - 2 in 0.02 A steps for 1 A (ct)
Current Change Fault Detectors (∆I
Voltage change fault detectors (∆V
Ground Overvoltage Unit 3V
, and ∆I
,∆I ,∆I
A B C
, ∆V and ∆V
) no setting required.
A B C
(no setting required).
0
), no setting required.
0
I.L. 40-385.7
, I , I , I ).:
AH BH CH OH
2-3