ABB RET670 Product Manual page 54

Transformer protection RET670
Customized
Product version: 1.2
Table 35. Faulty phase identification with load encroachment FMPSPDIS
Function
Minimum operate current
Load encroachment criteria:
Load resistance, forward and
reverse
Table 36. Distance measuring zone, quadrilateral characteristic, separate settings ZMRPDIS, ZMRAPDIS
Function
Number of zones
Minimum operate residual
current, zone 1
Minimum operate current, phase-
to-phase and phase-to-earth
Positive sequence reactance
Positive sequence resistance
Zero sequence reactance
Zero sequence resistance
Fault resistance, phase-to-earth
Fault resistance, phase-to-phase
Dynamic overreach
Impedance zone timers
Operate time
Reset ratio
Reset time
54
Range or value
(5-30)% of IBase
(0.5–3000) W/phase
(5–70) degrees
Range or value Accuracy
5 with selectable -
direction
(5-1000)% of IBase -
(10-1000)% of IBase -
(0.10-3000.00) Ω/ ± 2.0% static accuracy
phase ± 2.0 degrees static angular accuracy
Conditions:
(0.01-1000.00) Ω/
Voltage range: (0.1-1.1) x U
phase
Current range: (0.5-30) x I
(0.10-9000.00) Ω/
Angle: at 0 degrees and 85 degrees
phase
(0.01-3000.00) Ω/
phase
(0.10-9000.00) Ω/loop
(0.10-3000.00) 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 504 117-BEN D
Accuracy
± 1.0% of I
r
± 2.0% static 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
r
r
ABB