ABB RET670 - Function status

Table 72. Voltage control TR1ATCC and TR8ATCC
Function Range or value Accuracy
Transformer reactance (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 UBase ± 0.25 % of U
r
Outer voltage deadband (0.2–9.0)% of UBase -
Inner voltage deadband (0.1–9.0)% of UBase -
Upper limit of busbar voltage (80–180)% of UBase ± 0.5% of U
r
Lower limit of busbar voltage (70–120)% of UBase ± 0.5% of U
r
Undervoltage block level (50–120)% of UBase ± 0.5% of U
r
Time delay (long) for automatic control commands (3–1000) s ± 0.2% or ± 600 ms
whichever is greater
Time delay (short) for automatic control commands (1–1000) s ± 0.2% or ± 600 ms
whichever is greater
Minimum operating time in inverse mode (3–120) s ± 0.2% or ± 600 ms
whichever is greater
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 UBase -
Load voltage auto correction (-20.0–20.0)% of UBase -
Duration time for the reverse action block signal (30–6000) s ± 0.2% or ± 600 ms
whichever is greater
Current limit for reverse action block (0–100)% of I1Base -
Overcurrent block level (5–250)% of I1Base ± 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 at (10-200)% of
S
r
and (85-120)% of UBase
(-9999.99–9999.99) MW ± 1.0% of S
r
Alarm level of reactive power in forward and reverse direction at (10-200)%
of S
r
and (85-120)% of UBase
(-9999.99–9999.99) MVAr ± 1.0% of S
r
Time delay for alarms from power supervision (1–6000) s ± 0.2% or ± 600 ms
whichever is greater
Tap position for lowest and highest voltage (1–63) -
mA for lowest and highest voltage tap position (0.000–25.000) mA -
Type of code conversion BIN, BCD, GRAY, SINGLE, mA -
Transformer protection RET670 2.0
1MRK 504 141-BEN C
Product version: 2.0
ABB 83