Impedance protection
Table 26. Distance measuring zone, Quad ZMQPDIS
Function
Range or value
Accuracy
Number of zones
4 with selectable
direction
-
Minimum operate
residual current, zone 1
(5-30)% of IBase
-
Minimum operate current,
phase-to-phase and phase-
to-earth
(10-30)% of IBase -
Positive sequence
reactance, zone 1
(0.10-3000.00) Ω/
phase
± 2.0% static accuracy
± 2.0 degrees static angular accuracy
Conditions:
Voltage range: (0.1-1.1) x U
r
Current range: (0.5-30) x I
r
Angle: at 0 degrees and 85 degrees
Positive sequence
reactance, zone 2-
4
(0.50-3000.00) Ω/
phase
Positive sequence
resistance
(0.10-1000.00) Ω/
phase
Zero sequence reactance,
zone 1
(0.10-9000.00) Ω/
phase
Zero sequence reactance,
zone 2-
4
(0.50-9000.00) Ω/
phase
Zero sequence resistance
(0.50-3000.00) Ω/
phase
Fault resistance, phase-to-
earth
(1.00-9000.00) Ω/
loop
Fault resistance, phase-to-
phase
(1.00-3000.00) Ω/
loop
Dynamic overreach
<5% at 85
degrees
measured with
CVT’s and
0.5<SIR<30
-
Impedance zone timers
(0.000-60.000) s
± 0.5% ± 10 ms
Operate time
24 ms typically
-
Reset ratio
105% typically
-
Reset time
30 ms typically
-
Transformer protection RET670
1MRK 504 091-BEN B
Pre-configured
Product version: 1.1
Issued: June 2010
ABB
53
Содержание RELION RET670
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