ABB RET670 Product Manual page 53

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