AQ-F255 FEEDER PROTECTION
NOW WITH LINE PROTECTION
When we gave the most accurate protection relay in the world, line
protection, we obviously couldn’t make just another line protection,
we made the best one available on the market.
The feeder protection AQ-F255 is
now released with two new variants.
The new functionality enables line
protection in the well established
product line for feeder protection.
In addition to the full feeder protection
functionality the B variant includes
a fast and accurate line differential
protection functionality.
The C variant comes equipped with
Distance protection including some
revolutionary functionality, the
protected line segment can now
be divided int several segments
depending on the type of line.
The D variant will be equipped with
both line differential and distance
protection.
DISTANCE PROTECTION
LINE DIFFERENTIAL PROTECTION
EXCLUSIVE FEATURES
• with or without tele-protection
communication
• Line differential protection will
utilize the 1ms simplified
16s/cycle FFT current calculation
for fast response to master unit
• Up to 5 different line segments
in distance protection
• up to 5 different line segments
forward and reverse can be set
• Setting of line parameters can
be input by R/X values or Z/Ang
values
• IED calculates the electrical
length of the line automatically
when the parameters are set
• Quadrilateral, MHO and offset
MHO characteristics supported
• Ultra fast communication between
units on a dedicated process bus
• Line differential protection distance between of the relays is
defined
by the connection media. With
optic fiber up to 120km and with
copper max 8–10km
• Synchronizing of IED’s by prioritizing devices on process buss.
• Compensation of transformers in
line solutions
• Fast process bus with
prioritization of the devices
UNIQUE FEATURE TO MAKE DISTANCE PROTECTION
MORE ACCURATE THAN EVER BEFORE
In the diagram there are 3 different
line segments in in forward and
reverse directions, addition to the
5 protection zones
X
Protected line forward
Example of segments:
Reverse
Segment 2 Fwd
Segment1:
Zone5 non directional
Seg
men
t3F
wd
Forward
• Line length: 30km
• Line R:0.26 W/km
Zone1 Fwd
Se
gm
en
t1
Fw
d
• Line X:0.13 W/km
Zone2 Fwd
Segment2:
Segment 2 Rev
• Line length: 60km
• Line R:0.54 W/km
• Line X:0.4 W/km
t1
en
gm
Se
R
v
Re
Zone3 Rev
Segment3:
Zone4 Rev
Segm
ent 3
Rev
• Line length: 50km
• Line R:0.85 W/km
• Line X:0.38 W/km
Forward
Reverse
Protected line reverse
QUADRILATERAL CHARACTERISTICS
Quadrilateral characteristics
Forward and Reverse direction settings
Restrain out of
the characteristics
Trip inside the characteristics
Forward, reverse and
non-directional settings
Directional
characteristics
settings
• Non directional resistive and reactive
reach to forward and reverse direction
can be set freely
X reach setting
6
• Q2 resistive and Q4 reactive reach
angle can be set freely 0…44 degrees
• Q1 resistive reach can be reduced by
maximum resistive reach setting
Zone
Reduction
(not in MV)
8
4
2
Freely
settable angle
90deg + setting.
Max 44 degrees. 0
Maximum
allowed R reach
Set protected line
R reach setting
R reach angle
follows the line
setting
-2
-2
0
2
4
6
8
Freely settable angle
90deg + setting.
Max 44 degrees.
Arcteq Relays Ltd
Kvartsikatu 2 A 1
65300 Vaasa, Finland
www.arcteq.fi
sales@arcteq.fi
Arcteq support line:
+358 10 3221 388
EET 9:00 – 17.00