Arcteq AQ 110 Series User manual

INSTRUCTION MANUAL
AQ 110 Arc Protection Unit

Instruction manual AQ 110 arc protection unit 2 (80)
Read these instructions carefully and inspect the equipment to become familiar with it
before trying to install, operate, service or maintain it.
Electrical equipment should be installed, operated, serviced, and maintained only by
qualified personnel. Local safety regulations should be followed. No responsibility is
assumed by Arcteq for any consequences arising out of the use of this material.
We reserve right to changes without further notice.
Revision
1.2
Date
July 2011
Changes
-Sensor chapter revised. (Fiber pictures and point sensor
connections).
-Standard Arc System chapter revised. (e.g. scheme 0a
added)
-Dipswitch definition updated (e.g. HSO latch/non-latch)
-LED description revised, (current channels LEDs will not
blink during the auto-configuration.)
-Partly AQ110F information added.
-Dimensions and installation chapter, the depth of the unit
is changed from 170mm to 175mm.

Instruction manual AQ 110 arc protection unit 3 (80)
TABLE OF CONTENTS
1ABBREVIATIONS ........................................................................................... 6
2GENERAL....................................................................................................... 7
2.1 Arc protection unit AQ 110 features ....................................................... 7
2.2 Simplified block diagram ........................................................................ 9
3OPERATION AND CONFIGURATION.......................................................... 11
3.1 LED indicator functions ........................................................................ 11
3.2 LED OPERATION QUICK GUIDE........................................................ 12
3.3 Push-button description ....................................................................... 14
3.3.1 Auto configuration (system setup) ................................................... 14
3.4 Reset ................................................................................................... 14
3.5 Current threshold setting...................................................................... 15
3.6 Dipswitch settings ................................................................................ 15
3.7 Non-volatile memory ............................................................................ 19
4ARC SENSORS............................................................................................ 20
4.1 Arc light point sensor AQ 01................................................................. 20
4.1.1 AQ 01 Installation and wiring ........................................................... 21
4.1.2 AQ 01 Technical data ...................................................................... 23
4.2 Arc light fiber optic loop sensor AQ 06 ................................................. 23
4.2.1 AQ 06 Technical data ...................................................................... 24
4.3 Arc light fiber optic loop sensor AQ 07 ................................................. 25
4.3.1 AQ 07 Technical data ...................................................................... 26
4.4 Arc light fiber optic loop sensor AQ 08 ................................................. 26
4.4.1 AQ 08 Technical data ...................................................................... 27
4.5 Sensor Type Dependencies ................................................................. 28
4.6 Sensor Connection............................................................................... 28
4.6.1 Arc light point sensor AQ01 connection........................................... 28
5SYSTEM SELF-SUPERVISION .................................................................... 34
5.1 Open CT monitoring............................................................................. 34
6STANDARD ARC SCHEMES (AQ SAS)....................................................... 35
6.1 Scheme AQ 0A (One Main).................................................................. 36
6.1.1 Scheme characteristics.................................................................... 36
6.1.2 I/O description ................................................................................. 37
6.1.3 Trip logic, connection diagram and dipswitch settings ..................... 38

Instruction manual AQ 110 arc protection unit 4 (80)
6.2 Scheme AQ IA1 (One Main)................................................................. 39
6.2.1 Scheme characteristics.................................................................... 39
6.2.2 I/O description ................................................................................. 40
6.2.3 Trip logic, connection diagram and dipswitch settings ..................... 41
6.3 Scheme AQ IB1 (One Main)................................................................. 43
6.3.1 Scheme characteristics.................................................................... 43
6.3.2 I/O description ................................................................................. 44
6.3.3 Trip logic, connection diagram and dipswitch settings ..................... 45
6.4 Scheme AQ- IIA1 (Main-Tie-Main) ....................................................... 47
6.4.1 Scheme characteristics.................................................................... 47
6.4.2 I/O description ................................................................................. 48
6.4.3 Trip logic, connection diagram and dipswitch settings ..................... 52
6.5 Scheme AQ-IIB1 (Main-Tie-Main) ........................................................ 54
6.5.1 Scheme characteristics.................................................................... 54
6.5.2 I/O description ................................................................................. 55
6.5.3 Trip logic, connection diagram and dipswitch settings ..................... 58
7CONNECTIONS............................................................................................ 60
7.1 Outputs ................................................................................................ 62
7.1.1 Trip relays T1 and T2 ...................................................................... 62
7.1.2 Trip relays T3 and T4 ...................................................................... 62
7.1.3 High Speed Outputs (HSO1 and HSO2).......................................... 62
7.1.4 Binary output BO1 ........................................................................... 63
7.1.5 System failure relay SF.................................................................... 63
7.2 Inputs................................................................................................... 63
7.2.1 Current measurement inputs ........................................................... 63
7.2.2 Arc sensor channels S1, S2, S3, S4 and S5.................................... 63
7.2.3 Binary inputs BI1 and BI2 ................................................................ 64
7.3 Auxiliary voltage................................................................................... 64
8WIRING DIAGRAMS..................................................................................... 65
9DIMENSIONS AND INSTALLATION............................................................. 67
10 TESTING ...................................................................................................... 70
10.1 Carrying out testing in light only mode.................................................. 70
10.2 Carrying out testing in light and current mode ...................................... 71
10.3 Testing the CBFP function ................................................................... 72
10.4 Testing arc flash protection unit operation time .................................... 72

Instruction manual AQ 110 arc protection unit 5 (80)
10.5 Test plan example................................................................................ 73
11 TROUBLESHOOTING GUIDE ...................................................................... 75
12 TECHNICAL DATA ....................................................................................... 76
12.1 Protection stages ................................................................................. 76
12.2 Auxiliary voltage................................................................................... 76
12.3 Current measuring circuits ................................................................... 76
12.4 Trip relays T1, T2, T3, T4..................................................................... 76
12.5 High Speed Outputs HSO1, HSO2....................................................... 76
12.6 Binary Output BO1............................................................................... 77
12.7 Binary Inputs BI1, BI2 .......................................................................... 77
12.8 Disturbance tests ................................................................................. 77
12.9 Voltage tests ........................................................................................ 77
12.10Mechanical tests .................................................................................. 77
12.11Casing and package ............................................................................ 78
12.12Environmental conditions ..................................................................... 78
13 ORDERING CODES ..................................................................................... 79
13.1 AQ 110 Point sensor unit ..................................................................... 79
13.2 AQ 0x arc sensors................................................................................ 79
14 REFERENCE INFORMATION ...................................................................... 80

Instruction manual AQ 110 arc protection unit 6 (80)
1ABBREVIATIONS
CB Circuit breaker
CBFP Circuit breaker failure protection
CT Current transformer
EMC Electromagnetic compatibility
HW Hardware
HSO High speed output
LED Light emitting diode
LV Low voltage
MV Medium voltage
NC Normally closed
NO Normally open
SAS Standard arc scheme
SF System failure
SW Software
uP - Microprocessor

Instruction manual AQ 110 arc protection unit 7 (80)
2GENERAL
AQ 110 is a sophisticated micro-processor based arc flash protection unit with
combined current and arc sensing. Combined current and arc sensing provides
an integrated dual trip criteria. It is designed to minimize the damage caused by
an arcing fault (arc flash) by tripping the circuit breaker sourcing the fault current.
The AQ 110 complete system self-supervision function provides the highest level
of dependability by continuously monitoring all internal system functions along
with external connections.
AQ 110 is designed according to the latest protection relay standards and is
hence suitable for installations in any environment, such as utility, traditional or
renewable power plants, off shore, marine, oil and gas, mining, steel or any other
heavy industry applications as well as commercial and institutional electrical
systems. AQ 110 is suitable for either medium voltage or low voltage switchgear
and motor control center applications in both new and retrofit installations.
AQ 110 is a multipurpose arc flash protection unit and can be applied for variety
of applications. AQ 110 can be used as a stand-alone unit or as a main unit of a
more complex arc protection system through the binary bus.
2.1 ARC PROTECTION UNIT AQ 110 FEATURES
AQ 110 comes in two versions. AQ110P supports 4 point sensor channels and
optionally one fiber sensor channel. AQ 110F supports 3 fiber sensor channels.
All other features are the same in both versions. Main features of AQ 110:
-80-265Vac/dc auxiliary power supply or optional 18-72Vdc power supply
-3 phase current inputs (1/5 amps nominal)
-1 residual current input (1/5 amps nominal)
-4 arc point sensor channels and 1 arc fiber loop channel optionally (AQ
110P) or 3 arc fiber loop channels (AQ 110F)
-2 binary inputs (nominal voltage of 24 or 110 or 220Vdc)
-2 high-speed semiconductor trip outputs (direct trip circuit rated)
-2 normally open trip relay outputs (direct trip circuit rated)
-1 normally open or optionally normally closed (electronic lock-out) trip
relay output (direct trip circuit rated)

Instruction manual AQ 110 arc protection unit 8 (80)
-1 binary output (24Vdc)
-1 system failure relay output
Figure 2-1 Arc protection unit AQ 110

Instruction manual AQ 110 arc protection unit 9 (80)
2.2 SIMPLIFIED BLOCK DIAGRAM
Simplified block diagrams in Figure 2-2: AQ110P simplified block diagram and
Figure 2-3: AQ 110F simplified block diagram show the main components of
the AQ110 unit.
Figure 2-2: AQ110P simplified block diagram

Instruction manual AQ 110 arc protection unit 10 (80)
Figure 2-3: AQ 110F simplified block diagram

Instruction manual AQ 110 arc protection unit 11 (80)
3OPERATION AND CONFIGURATION
3.1 LED INDICATOR FUNCTIONS
AQ 110 contains 20 indication LEDs. A user definable text pocket can be slid in
for identifying each LED function (except Power and Error LEDs). LEDs are
located at the front plate of the unit for clear viewing without a need for opening
doors.
During power up the unit performs a LED-test. All LEDs are turned on for 2
seconds and then back off. Only the blue power LED will remain on. When
powered up, the unit goes in 50ms into protection mode even while the LED test
is being performed.
In normal operation only the blue power LED is ON.
All current measuring channels (IL1, IL2, IL3 and Io) have indication LEDs. When
any channel exceeds the set threshold value the indication LED is turned on until
manual reset is performed. In an open CT condition a corresponding current
channel indicator and Error LED are blinking.
The sensor LEDs in inactive condition are off. If arc sensor is activated the
corresponding sensor channel LED will turn on if the activation is longer than
1.5ms. The sensor LED activation function is latched (steady light). To clear the
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In case of loose sensor wire or configuration mismatch (new sensor attached
without running auto-configuration system setup, see chapter 3.3.1) situation the
corresponding LED will start flashing and ERROR LED will activate.
The Binary I/O LEDs are indicating the I/O-line status. If any of the lines become
active for more than 1.5ms the corresponding LED will turn on (latch).
In trip situation the corresponding trip LED will turn on. Trip outputs are controlled
by dipswitch settings, see chapter 3.6.
All activation and trip indication LEDs are latched, even if the dipswitch setting is
in non--button.
LED indications are stored in non-volatile EPROM memory for identifying the trip
information in case the auxiliary power is lost. When re-powering the unit after

Instruction manual AQ 110 arc protection unit 12 (80)
power supply loss the actual LED status can be visualized from the front of the
unit.
3.2 LED OPERATION QUICK GUIDE
The table below describes the function of each indicator LED in front of the AQ
110 unit. Note that the use of sensor channels differs between AQ 110P and AQ
110F versions. Sensor channels S4 and S5 are not in use in AQ 110F version.
LED
OFF
STEADY
ON
BLINKING
ACTION IF ABNORMAL
POWER
Blue
Auxiliary
supply
disconnected
Auxiliary power
connected
N/A
Check the power source
ERROR
Red
System
healthy
System failure
Configuration
mismatch.
Protection partly
operational
Verify system condition. see
chapters 11: Troubleshooting
guide and 5: System self-
supervision
T1
Red
Normal status
Trip relay T1
activated
N/A
Check the reason for trip.
Clear the fault and reset
indications by pushing SET
button
T2
Red
Normal status
Trip relay T2
activated
N/A
Check the reason for trip.
Clear the fault and reset
indications by pushing SET
button
T3
Red
Normal status
Trip relay T3
activated
N/A
Check the reason for trip.
Clear the fault and reset
indications by pushing SET
button
T4
Red
Normal status
Trip relay T4
activated
N/A
Check the reason for trip.
Clear the fault and reset
indications by pushing SET
button
S1
Amber
Normal status
Sensor channel
1 activated
Sensor channel
1 discontinuity
or system set-
up not
performed
Check why sensor activated or
check the sensor continuity or
perform system set-up (see
chapter:3.3.1 Auto
configuration (system setup)
S2
Amber
Normal status
Sensor channel
2 activated
Sensor channel
discontinuity or
system set-up
not performed
Check why sensor activated or
check the sensor continuity or
perform system set-up (see
chapter:3.3.1 Auto
configuration (system setup)
S3
Amber
Normal status
Sensor channel
3 activated
Sensor channel
3 discontinuity
or system set-up
not performed
Check why sensor activated or
check the sensor continuity or
perform system set-up (see
chapter:3.3.1 Auto
configuration (system setup)
S4
Amber
Normal status
Sensor channel
4 activated
N/A in AQ 110F
Sensor channel
4 discontinuity
or system set-up
not performed
Check why sensor activated or
check the sensor continuity or
perform system set-up (see
chapter:3.3.1 Auto
configuration (system setup)

Instruction manual AQ 110 arc protection unit 13 (80)
N/A in AQ
110F
S5
Amber
N/A in AQ
110F
Normal status
Sensor channel
5 activated
N/A in AQ 110F
Fiber sensor
discontinuity or
system set-up
not performed
Check why sensor activated or
check the sensor continuity or
perform system set-up (see
chapter:3.3.1 Auto
configuration (system setup)
BI1
Amber
Normal status
Binary input 1
activated
Binary input 1
loose
connection
Check the binary input wiring.
BI2
Amber
Normal status
Binary input 2
activated
Binary input 2
loose
connection
Check the binary input wiring.
BO1
Amber
Normal status
Binary Output
activated
N/A
IL1
Amber
Normal status,
actual current
below set point
IL1 current
above setpoint
Open CT
connection in
channel IL1
Check the current setpoint
levels or check the CT wiring.
IL2
Amber
Normal status,
actual current
below set point
IL2 current
above setpoint
Open CT
connection in
channel IL2
Check the current setpoint
levels or check the CT wiring.
IL3
Amber
Normal status,
actual current
below set point
IL3 current
above setpoint
Open CT
connection in
channel IL3
Check the current setpoint
levels or check the CT wiring
Io
Amber
Normal status,
actual current
below set point
Residual
current above
setpoint
N/A
Check the residual current
setpoint level
HSO1
Red
Normal status
HSO 1
activated.
N/A
Check the reason for
activation. Clear the fault and
reset indications by pushing
SET button.
HSO2
Red
Normal status
HSO 2
activated.
N/A
Check the reason for
activation. Clear the fault and
reset indications by pushing
SET button.
Table 3-1: LED operation quick guide

Instruction manual AQ 110 arc protection unit 14 (80)
3.3 PUSH-BUTTON DESCRIPTION
AQ 110 contains one single push-button (SET) that can be used for all
operational functions of the unit. The push-button is utilized for auto-configuration
of the system (see chapter 3.3.1) and for resetting the indicators and latched
output relays.
3.3.1 AUTO CONFIGURATION (SYSTEM SETUP)
When all current circuits, sensors and binary lines have been connected an auto-
configuration procedure must be executed. The initialization sequence is
-button for 2 seconds, and the AQ 110 sensor
LEDs and BI1/BI2 LEDs start blinking. The unit scans these inputs to see if they
are connected and when input is detected the corresponding LEDs are lit up to
mark that a connection was found. The inputs without connection continue
blinking during the remaining 3 seconds. After total time of 5 seconds, all LEDs
are turned off. During this system setup the dipswitch setting are also stored in
non-volatile memory.
All sensor inputs will remain operational even when not auto-configured. The
auto-configuration is only used for self-supervision purposes.
3.4 RESET
All LED indications and latched trip relays are reset by pressing t-button
for 1 second. Otherwise the latched trip relays will remain activated until auxiliary
power is disconnected. All LED indications will remain active until reset is
performed by operator even in case of disconnecting auxiliary power supply (see
chapter 3.7 Non-volatile memory).

Instruction manual AQ 110 arc protection unit 15 (80)
3.5 CURRENT THRESHOLD SETTING
AQ 110 unit has 4 current measurement inputs utilized for 3 phase and residual
current measurement. Both phase current and residual current measurements
are utilized as second trip criteria in an arc protection system in order to avoid trip
caused by natural light sources. Phase overcurrent threshold is typically set 50 %
above the highest load current. Residual overcurrent is set very sensitive.
Setpoints are set using trimmers, see Figure 3-1. An accurate setting is obtained
by injecting desired set value using relay test set to phase and residual current
inputs of AQ 110 simultaneously adjusting the trimmers until phase and residual
current indication LEDs are lit.
Setting range for phase overcurrent stage is 0.5 to 5xIn. Setting range for
residual overcurrent stage is 0.05 to 1xIn.
Figure 3-1 AQ110 overcurrent setting trimmers
3.6 DIPSWITCH SETTINGS
AQ 110 functionality such as tripping logic is configured using dipswitch settings.
The unit contains two switch groups SW1 and SW2 (see Figure 3-12).
Dipswitches are located at the back of the unit for easy access.
Different trip schemes can be easily programmed by selecting the appropriate
dipswitch settings. The most convenient way to set the AQ 110 single unit or
more complex arc protection system is to use standard arc schemes (SAS). For
different SAS applications see chapter 6.
Tripping may be selected based on arc light only or current thresholds. Other
tripping criteria such as undervoltage, or similar may be applied instead of
overcurrent as well using binary inputs. Also the circuit breaker failure protection

Instruction manual AQ 110 arc protection unit 16 (80)
(CBFP) scheme may be enabled using the dipswitches. See Table 3-2 AQ 110
dipswitch SW 1 setting and Table 3-3: AQ 110 dipswitch SW 2 setting for details
of settings.
Figure 3-1 AQ 110 dipswitch SW1 and SW2
Dipswitch
Function selection
ON (LEFT
POSITION)
OFF (RIGHT
POSITION)
8
S1: L> / L>+I>
Sensor channel 1 trip
criteria
Trip on light only (L>).
Trip on light and
overcurrent (L> + I>).
Both signals are
required simultaneously
to trip.
7
S2: L> / L>+I>
Sensor channel 2 trip
criteria
Trip on light only (L>).
Trip on light and
overcurrent (L> + I>).
Both signals are
required simultaneously
to trip.
6
L> / L>+I>
Sensor channels 3-5
trip criteria (channel 3 in
AQ 110F)
Trip on light only (L>).
Trip on light and
overcurrent (L> + I>).
Both signals are
required simultaneously
to trip.
5
a/b
Selection of standard
arc scheme (SAS) type
SAS type a.
SAS type b.
4
Scheme select
Selection of standard
arc scheme (SAS)
Refer to chapter 6
Refer to chapter 6
3
Scheme select
Selection of standard
arc scheme (SAS)
Refer to chapter 6
Refer to chapter 6
2
Scheme select
Selection of standard
arc scheme (SAS)
Refer to chapter 6
Refer to chapter 6
1
Scheme select
Selection of standard
arc scheme (SAS)
Refer to chapter 6
Refer to chapter 6
Table 3-2 AQ 110 dipswitch SW 1 setting

Instruction manual AQ 110 arc protection unit 17 (80)
Dipswitch
Function selection
ON (LEFT
POSITION)
OFF (RIGHT
POSITION)
8
T1/T2 Latch/non-
latch
Latch or non-latch for
trip relays T1 and T2
T1 and T2 operate as
latched.
T1 and T2 operate as
non-latched.
7
HSO Latch/non-
latch
Latch or non-latch for
HSO1 and HSO2
HSO1 and HSO2
operates as latched.
HSO1 and HSO2
operates as non-
latched.
6
S1:P>/L>
Reserved for future use
N/A
N/A
5
S5:Fiber Loop /
Eliminator
Selection of Fiber loop
or Arc Quenching
system (eliminator)
control
N/A in AQ 110F
S5 fiber sensor channel
operates as fiber loop
sensor function.
S5 operates as arc
quenching system
(eliminator) control. The
Tx terminal of S5
channel sends test
pulse signal to
quenching system.
4
FAST / CBFP
Selection of Trip relay
T2 function
Trip relay T2 will have
7ms trip time.
Trip relay T2 will work
as CBFP relay. If any
sensor or L> input (BI2)
is activated for more
than set CBFP time (100
or 150ms) the CBFP
function activates trip
relay T2 and binary
output BO1.
Note: Master trip
command (BI2, see
dipswitch 4) will not
activate T2 when in
CBFP mode.
3
100 / 150ms
CBFP time setting
CBFP time is set to
100ms.
CBFP time is set to
150ms.
2
I> 1A / 5A
Phase currents
IL1,IL2,IL3 nominal
current selection
1A nominal current
5A nominal current
1
Io> 1A / 5A
Residual current Io
nominal current
selection
1A nominal current
5A nominal current
Table 3-3: AQ 110 dipswitch SW 2 setting

Instruction manual AQ 110 arc protection unit 18 (80)
Figure 3-2: AQ 110P internal logic.
Figure 3-3: AQ 110F internal logic

Instruction manual AQ 110 arc protection unit 19 (80)
3.7 NON-VOLATILE MEMORY
All critical system data including dipswitch settings and auto-configuration file
described in chapter 3.3.1 are stored in EPROM non-volatile memory to ensure
correct operation and full self-supervision even if auxiliary power is lost
temporarily.
Also all LED indications described in chapter 3.1 are stored in non-volatile
memory in order to provide quick recovery of the system status indication even if
auxiliary power is lost temporarily. This feature is especially important if auxiliary
power is lost after tripping.

Instruction manual AQ 110 arc protection unit 20 (80)
4ARC SENSORS
AQ 100 series provides choice of different types of arc sensors to be utilized in
different units and different switchgear types according to specific application
requirements. Available sensor types are arc light point sensors and arc light fiber
optic loop sensors.
Arc light point sensors are typically installed in metal clad compartments
providing quick accurate location of the faulted area. Arc light fiber loop sensors
are installed typically to cover a wider protected area with one fiber when no need
for more exact fault location exists.
4.1 ARC LIGHT POINT SENSOR AQ 01
AQ 01 is an arc light point sensor with a light sensitive photodiode element
activated by arc light. AQ01 arc sensors should be mounted in the switchgear
cubicles in such a way that the light sensitive part covers the protected area as
completely as possible. One sensor per closed metal clad compartment should
be utilized. In open spaces, such as the bus bar section, arc sensors should be
mounted maximum 2 meters apart.
The fixed light sensitivity of the AQ01 sensor is 8000 Lux. Sensor does not
require user settings. Detection radius is 180 degrees.