GE L90 Instruction Manual page 46

SPECIFICATIONS
PHASE DISTANCE OPERATING TIME CURVES
The operating times are response times of a microprocessor part of the relay. See output contacts specifications for estimation of the
total response time for a particular application. The operating times are average times including variables such as fault inception angle
or type of a voltage source (magnetic VTs and CVTs). The figure shows zone 1 distance time curves for a 60 Hz system at nominal system
frequency.
2
GROUND DISTANCE
Characteristic:
Reactance polarization:
Non-homogeneity angle:
Number of zones:
Directionality:
Reach (secondary Ω):
Reach accuracy:
Zone 1:
Zones 2 to 5:
Distance characteristic angle:
Distance comparator limit angle:
Directional supervision:
Characteristic angle:
Limit angle:
Zero-sequence compensation
Z0/Z1 magnitude:
Z0/Z1 angle:
Zero-sequence mutual compensation
Z0M/Z1 magnitude:
Z0M/Z1 angle:
Right blinder (Quad only):
Reach:
Characteristic angle:
Left blinder (Quad only):
Reach:
Characteristic angle:
Time delay:
Timer accuracy:
Current supervision:
Level:
2-32
Mho (memory polarized or offset) or Quad (memory polarized or non-directional)
negative-sequence or zero-sequence current
–40 to 40° in steps of 1
5
forward, reverse, or non-directional
0.02 to 500.00 Ω in steps of 0.01
±5% including the effect of CVT transients up to an SIR of 30 and ±7% for 30<SIR< 60 at RCA
angle
±5% for steady fault conditions
30 to 90° in steps of 1
30 to 90° in steps of 1
30 to 90° in steps of 1
30 to 90° in steps of 1
0.00 to 10.00 in steps of 0.01
–90 to 90° in steps of 1
0.00 to 7.00 in steps of 0.01
–90 to 90° in steps of 1
0.02 to 500 Ω in steps of 0.01
60 to 90° in steps of 1
0.02 to 500 Ω in steps of 0.01
60 to 90° in steps of 1
0.000 to 65.535 s in steps of 0.001
±3% of operate time or ±1/4 cycle (whichever is greater)
neutral current (3I_0)
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
CHAPTER 2: PRODUCT DESCRIPTION