Control
Table 47. Voltage control TR8ATCC, TCMYLTC
Function
Range or value
Accuracy
Transformer reactance on ATCC side
(0.1–200.0)Ω, primary
-
Time delay for lower command when fast step down mode is activated
(1.0–100.0) s
-
Voltage control set voltage
(85.0–120.0)% of UB2
±0.5% of U
r
Outer voltage deadband
(0.2–9.0)% of UB2
± 5,0% of set value
Inner voltage deadband
(0.1–9.0)% of UB2
± 5,0% of set value
Upper limit of busbar voltage
(80–180)% of UB2
± 0.5% of U
r
Lower limit of busbar voltage
(70–120)% of UB2
± 0.5% of U
r
Undervoltage block level
(0–120)% of UB2
± 0.5% of U
r
Time delay (long) for automatic control commands
(3–1000) s
± 0.5% ± 110 ms
Time delay (short) for automatic control commands
(1–1000) s
± 0.5% ± 110 ms
Minimum operating time in inverse mode
(3–120) s
± 0.5% ± 110 ms
Line resistance
(0.00–150.00)Ω, primary
-
Line reactance
(-150.00–150.00)Ω, primary
-
Load voltage adjustment constants
(-20.0–20.0)% of UB2
± 5,0% of set value
Load voltage auto correction
(-20.0–20.0)% of UB2
± 5,0% of set value
Overcurrent block level
(0–250)% of IBase
± 1.0% of I
r
at I≤I
r
± 1.0% of I at I>I
r
Level for number of counted raise/lower within one hour
(0–30) operations/hour
-
Level for number of counted raise/lower within 24 hours
(0–100) operations/day
-
Time window for hunting alarm
(1–120) minutes
-
Hunting detection alarm, max operations/window
(3–30) operations/window
-
Alarm level of active power in forward and reverse direction
(-9999.99–9999.99) MW
± 1.0% of S
r
Alarm level of reactive power in forward and reverse direction
(-9999.99–9999.99) MVAr
± 1.0% of S
r
Time delay for alarms from power supervision
(1–6000) s
± 0.5% ± 110 ms
Tap position for lowest and highest voltage
(1–63)
-
Type of code conversion
Binary, BCD, Gray, ContactPerTap
-
Time after position change before the value is accepted
(1–60) s
± 0.5% ± 110 ms
Tap changer constant time-out
(1–120) s
± 0.5% ± 110 ms
Raise/lower command output pulse duration
(0.5–10.0) s
± 0.5% ± 110 ms
Logic
Table 48. Tripping logic common 3-phase output SMPPTRC
Function
Range or value
Accuracy
Trip action
3-ph
-
Timers
(0.000-60.000) s
± 0.5% ± 10 ms
Transformer protection RET650
1MRK 504 137-BEN B
Product version: 1.3
50
ABB
