ABB RET670 Product Manual page 53

ABB
Transformer protection RET670
Customized
Product version: 1.2
Table 33. Full-scheme distance protection, Mho characteristic ZMHPDIS
Function
Number of zones with selectable
directions
Minimum operate current
Positive sequence impedance,
phase-to-earth loop
Positive sequence impedance
angle, phase-to-earth loop
Reverse reach, phase-to-earth
loop (Magnitude)
Magnitude of earth return
compensation factor KN
Angle for earth compensation
factor KN
Dynamic overreach
Timers
Operate time
Reset ratio
Reset time
Table 34. 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
5 with selectable direction
(10–30)% of I
Base
(0.005–3000.000) W/phase
(10–90) degrees
(0.005–3000.000) Ω/phase
(0.00–3.00)
(-180–180) degrees
<5% at 85 degrees measured
with CVT's and 0.5<SIR<30
(0.000-60.000) s
20 ms typically (with static
outputs)
105% typically
30 ms typically
Range or value
5 with selectable direction
IBase
(10-30)% of
(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 504 117-BEN D
Accuracy
-
-
± 2.0% static accuracy
Conditions:
Voltage range: (0.1-1.1) x U
r
Current range: (0.5-30) x I
r
Angle: 85 degrees
-
± 0.5% ± 10 ms
-
-
-
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
r
Angle: at 0 degrees and 85 degrees
-
± 0.5% ± 10 ms
-
-
-
r
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