Arcteq AQ-M255, Инструкция по эксплуатации

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Pick-up
The the pick-up of the I0dir> function is controlled by the
I0
set
setting parameter and the
U0
set
setting
parameter. The former defines the maximum allowed measured current, while the latter defines the
maximum allowed measured voltage and checks the angle difference before action from the function.
The function constantly calculates the ratio between the I0
set
and the U0
set
and the measured
magnitudes ( I
m
and U
m
). The reset ratio of 97 % is built into the function and is always relative to the
I0
set
(or U0
set
) value. When the I
m
exceeds the I0
set
value it triggers the pick-up operation of the
function.
Table. 5.3.5 - 70. Pick-up settings.
Name Description Range Step Default
I0
set
Pick-up setting
0.005…40.00×I
n
0.001×I
n
1.20×I
n
U0
set
Pick-up setting 1…75%U
n
0.01%U
n
20%U
n
Grounding
type
Network grounding method
1: Unearthed
[32N Var]
2: Petersen coil
GND [32N Watt]
3: Grounded
[67N]
4: I0
Cos
& I0
Sin
broad range with
MCD [32N Var/
Watt]
-
1:
Unearthed
Multi-criteria
detection
Activation of detecting healthy or unhealthy feeder by analyzing
symmetrical components of currents and voltages. Visible when
earthing type is set to I0
Cos
& I0
Sin
broad range mode.
1: Not used
2: Used
-
1: Not
used
Unearthed/
Compensated
border angle
Dividing the angle between unearthed and compensated
tripping (see description later in this document). Visible when
earthing type is set to I0
Cos
& I0
Sin
broad range mode.
-45.0…90° 0.1° 45°
Angle Tripping area size (earthed network) ±45.0…135.0° 0.1° ±88°
Angle offset Protection area direction (earthed network) 0.0…360.0° 0.1° 0.0°
Angle blinder I0 angle blinder (Petersen coil earthed) -90.0…0.0° 0.1° -90°
The pick-up activation of the function is not directly equal to the START signal generation of the
function. The START signal is allowed if the blocking condition is not active.
A AQ Q-M255 -M255
Instruction manual
Version: 2.06
© Arcteq Relays Ltd
IM00020 83