ABB RET670 Product Manual page 55

ABB
Transformer protection RET670
Pre-configured
Product version: 1.1
Table 28. Full-scheme distance protection, quadrilateral for earth faults ZMMPDIS
Function
Number of zones
Minimum operate current
Positive sequence
reactance
Positive sequence
resistance
Zero sequence reactance
Zero sequence resistance
Fault resistance, Ph-E
Dynamic overreach
Impedance zone timers
Operate time
Reset ratio
Reset time
Range or value
4 with selectable direction -
(10-30)% of IBase
(0.50-3000.00) W/phase
(0.10-1000.00) Ω/phase
(0.50-9000.00) Ω/phase
(0.50-3000.00) Ω/phase
(1.00-9000.00) W/loop
<5% at 85 degrees
measured with CCVT's
and 0.5<SIR<30
(0.000-60.000) s
24 ms typically
105% typically
30 ms typically
1MRK 504 091-BEN B
Issued: June 2010
Accuracy
-
± 2.0% static accuracy
± 2.0 degrees static angular accuracy
Conditions:
Voltage range: (0.1-1.1) x U
Current range: (0.5-30) x I
Angle: at 0 degrees and 85 degrees
-
± 0.5% ± 10 ms
-
-
-
r
r
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