ABB Relion 670 series, Technical Manual

Page: 911 / 1432

TCMYLTC (84) and TCLYLTC (84) also serve the purpose of giving information about tap position
to the transformer differential protection T2WPDIF (87T) and T3WPDIF (87T).
14.4.11 Technical data
SEMOD175215-2 v12
Table 544: TCMYLTC (84) and TLCYLTC (84) technical data
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 VBase ±0.25 % of V
n
Outer voltage deadband (0.2–9.0)% of VBase -
Inner voltage deadband (0.1–9.0)% of VBase -
Upper limit of busbar voltage (80–180)% of VBase ±0.5% of V
n
Lower limit of busbar voltage (70–120)% of VBase ±0.5% of V
n
Undervoltage block level (50–120)% of VBase ±0.5% of V
n
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 VBase -
Load voltage auto correction (-20.0–20.0)% of VBase -
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
n
at I≤I
n
±1.0% of I at I>I
n
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
n
and
(85-120)% of VBase
(-9999.99–9999.99) MW ±1.0% of S
n
Alarm level of reactive power in forward and
reverse direction at (10-200)% of S
n
and
(85-120)% of VBase
(-9999.99–9999.99) MVAr ±1.0% of S
n
Table continues on next page
1MRK 502 066-UUS B Section 14
Control
905
Technical manual