ABB RET670 Product Manual page 73

ABB
Transformer protection RET670
Customized
Product version: 1.2
Table 69. Voltage control TR1ATCC, TR8ATCC, TCMYLTC and TLCYLTC
Function
Transformer reactance
Time delay for lower command when fast
step down mode is activated
Voltage control set voltage
Outer voltage deadband
Inner voltage deadband
Upper limit of busbar voltage
Lower limit of busbar voltage
Undervoltage block level
Time delay (long) for automatic control
commands
Time delay (short) for automatic control
commands
Minimum operating time in inverse mode
Line resistance
Line reactance
Load voltage adjustment constants
Load voltage auto correction
Duration time for the reverse action block
signal
Current limit for reverse action block
Overcurrent block level
Level for number of counted raise/lower
within one hour
Level for number of counted raise/lower
within 24 hours
Time window for hunting alarm
Hunting detection alarm, max operations/
window
Alarm level of active power in forward and
reverse direction
Alarm level of reactive power in forward and
reverse direction
Time delay for alarms from power supervision
Tap position for lowest and highest voltage
mA for lowest and highest voltage tap position
Range or value
(0.1–200.0)Ω, primary
(1.0–100.0) s
(85.0–120.0)% of UB
(0.2–9.0)% of UB
(0.1–9.0)% of UB
(80–180)% of UB
(70–120)% of UB
(0–120)% of UB
(3–1000) s
(1–1000) s
(3–120) s
(0.00–150.00)Ω, primary
(-150.00–150.00)Ω, primary
(-20.0–20.0)% of UB
(-20.0–20.0)% of UB
(30–6000) s
(0–100)% of I1Base
(0–250)% of I1Base
(0–30) operations/hour
(0–100) operations/day
(1–120) minutes
(3–30) operations/window
(-9999.99–9999.99) MW
(-9999.99–9999.99) MVAr
(1–6000) s
(1–63)
(0.000–25.000) mA
1MRK 504 117-BEN D
Accuracy
-
-
±0.25% of U
r
-
-
± 1.0% of U
r
± 1.0% of U
r
± 1.0% of U
r
± 0.5% ± 10 ms
± 0.5% ± 10 ms
± 0.5% ± 10 ms
-
-
-
-
± 0.5% ± 10 ms
-
± 1.0% of I at I≤I
r r
± 1.0% of I at I>I
r
-
-
-
-
± 1.0% of S
r
± 1.0% of S
r
± 0.5% ± 10 ms
-
-
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