Name
Range
Description
TT>
Condition
0: Normal
1: Alarm 1
ON
2: Alarm 2
ON
3: Inhibit
ON
4: Trip ON
5: Blocked
The function's operating condition at the moment considering binary IO signal status. No outputs
are controlled when the status is "Normal".
Thermal
status
0: Light/No
load
1: High
overload
2:
Overloading
3: Load
normal
The function's thermal image status. When the measured current is below 1 % of the nominal
current, the status "Light/No load" is shown. When the measured current is below the trip limit,
the status "Load normal" is shown. When the measured current is above the pick-up limit but below
2 x
I
n
, the status "Overloading" is shown. When the measured current is above 2 x
I
n
, the status
"High overload" is shown.
TT>
Setting
alarm
0: SF
setting ok
1: Service
factor set
fault.
Override to
1.0
Indicates if SF setting has been set wrong and the actually used setting is 1.0. Visible only when
there is a setting fault.
TT>
Setting
alarm
0: Ambient
setting ok
1: Ambient
t set fault.
Override to
1.0
Indicates if ambient temperature settings have been set wrong and actually used setting is 1.0.
Visible only when there is a setting fault.
TT>
Setting
alarm
0: Nominal
current calc
ok
1: Nominal
current set
fault.
Override to
1.0
Indicates if nominal current calculation is set wrong and actually used setting is 1.0. Visible only
when there is a setting fault.
TT>
Setting
alarm
0: Ambient
setting ok
1:
Inconsistent
setting of
ambient k
Indicates if ambient k setting has been set wrong. Visible only when there is a setting fault.
Table. 5.3.9 - 81. Measurements.
Name
Range
Description/values
Currents
0: Primary A
1: Secondary A
2: Per unit
The active phase current measurement from IL1 (A), IL2 (B) and IL3 (C) phases in given
scalings.
Thermal
image
0: Thermal image
calc.
- TT> Trip expect mode: No trip expected/Trip expected
- TT> Time to 100 % theta: Time to reach the 100 % thermal cap
- TT> Rreference T curr.: reference/pick-up value (IEQ)
- TT> Active meas. curr.: the measured maximum TRMS current at a given moment
- TT> T est. with act. curr.: estimation of the used thermal capacity including the current
at a given moment
- TT> T at a given moment: the thermal capacity used at that moment
A
AQ
Q-T256
-T256
Instruction manual
Version: 2.06
© Arcteq Relays Ltd
IM00028
101
Summary of Contents for AQ-T256
Page 1: ...AQ T256 Transformer protection IED Instruction manual...
Page 2: ......
