Arcteq AQ 102 User manual

INSTRUCTION MANUAL
AQ 102 Arc Protection Unit

Instruction manual –AQ 102 Arc protection unit 2 (45)
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
1.0
Date
October 2011
Changes
Initial version.
Revision
1.1
Date
October 2011
Changes
Product image
Revision
1.2
Date
November 2011
Changes
Chapter 3.3.1 is revised, e.g. a dipswitch forward-and-back
feature is added to system configuration.
Chapter 3.5.1 is revised, e.g. the scheme selection by dip-
switching is added. A selective and non-selective scheme
are added in.
Revision
1.3
Date
May 2019
Changes
Add input connection check.
Technical data update.

Instruction manual –AQ 102 Arc protection unit 3 (45)
TABLE OF CONTENTS
1ABBREVIATIONS..................................................................................................................................5
2GENERAL................................................................................................................................................6
2.1 Arc protection unit AQ 102 features.................................................................................6
2.2 Simplified block diagram.......................................................................................................8
3OPERATION AND CONFIGURATION ...........................................................................................9
3.1 LED indicator functions..........................................................................................................9
3.2 LED Operation Quick Guide .............................................................................................. 10
3.3 Push-button description..................................................................................................... 11
3.3.1 Auto configuration (system setup)........................................................................... 11
3.3.2 Reset.................................................................................................................................... 11
3.3.3 Input connection check................................................................................................ 12
3.4 Dipswitch settings................................................................................................................. 12
3.4.1 Scheme select dip-switch settings............................................................................ 14
3.5 Non-volatile memory........................................................................................................... 16
4ARC SENSORS ................................................................................................................................... 17
4.1 Arc light point sensor AQ 01............................................................................................. 17
4.1.1 AQ 01 Installation and wiring..................................................................................... 18
4.1.2 AQ 01 Technical data .................................................................................................... 20
4.2 Arc light fiber optic loop sensor AQ 06 ........................................................................ 20
4.2.1 AQ 06 Technical data .................................................................................................... 21
4.3 Arc light fiber optic loop sensor AQ 07 ........................................................................ 22
4.3.1 AQ 07 Technical data .................................................................................................... 23
4.4 Arc light fiber optic loop sensor AQ 08 ........................................................................ 23
4.4.1 AQ 08 Technical data .................................................................................................... 24
4.5 Sensor Type Dependencies ............................................................................................... 25
5SYSTEM SELF-SUPERVISION ........................................................................................................ 26
6APPLICATION EXAMPLES.............................................................................................................. 27
6.1 MV or LV application with current and light condition........................................... 27
6.2 Circuit breaker failure protection (CBFP)...................................................................... 28
7CONNECTIONS................................................................................................................................. 29
7.1 Outputs..................................................................................................................................... 30
7.1.1 Trip relays T1 and T2 ..................................................................................................... 30
7.1.2 Trip relays T3 and T4 ..................................................................................................... 30
7.1.3 Binary output BO1.......................................................................................................... 30

Instruction manual –AQ 102 Arc protection unit 4 (45)
7.1.4 System failure relay SF.................................................................................................. 31
7.2 Inputs......................................................................................................................................... 31
7.2.1 Arc fiber optic loop sensor channels S1, S2, S3................................................... 31
7.2.2 Binary inputs BI1 and BI2............................................................................................. 31
7.3 Auxiliary voltage.................................................................................................................... 32
8WIRING DIAGRAM........................................................................................................................... 33
9DIMENSIONS AND INSTALLATION........................................................................................... 34
10TESTING............................................................................................................................................... 36
10.1 Carrying out testing in light only mode........................................................................ 36
10.2 Carrying out testing in light and current mode......................................................... 37
10.3 Testing the CBFP function.................................................................................................. 38
10.4 Testing arc flash protection unit operation time....................................................... 38
10.5 Test plan example................................................................................................................. 39
11TROUBLESHOOTING GUIDE......................................................................................................... 40
12TECHNICAL DATA............................................................................................................................ 41
12.1 Protection................................................................................................................................. 41
12.2 Auxiliary voltage.................................................................................................................... 41
12.3 Trip relays T1, T2, T3, T4 ..................................................................................................... 41
12.4 System failure relay SF ........................................................................................................ 41
12.5 Binary Output BO1................................................................................................................ 42
12.6 Binary Inputs BI1, BI2........................................................................................................... 42
12.7 Disturbance tests................................................................................................................... 42
12.8 Voltage tests........................................................................................................................... 43
12.9 Mechanical tests.................................................................................................................... 43
12.10 Casing and package......................................................................................................... 43
12.11 Environmental conditions.............................................................................................. 43
13ORDERING CODES........................................................................................................................... 44
13.1 AQ102 Fiber optic loop sensor unit................................................................................ 44
13.2 AQ 0x arc sensors.................................................................................................................. 44
14REFERENCE INFORMATION ......................................................................................................... 45

Instruction manual –AQ 102 Arc protection unit 5 (45)
1ABBREVIATIONS
CB –Circuit breaker
CBFP –Circuit breaker failure protection
EMC –Electromagnetic compatibility
EPROM –Erasable programmable read only memory
HW –Hardware
LED –Light emitting diode
LV –Low voltage
ms –Millisecond
MV –Medium voltage
NC –Normally closed
NO –Normally open
SF –System failure
SW –Software
uP - Microprocessor

Instruction manual –AQ 102 Arc protection unit 6 (45)
2GENERAL
AQ 102 is a sophisticated micro-processor based arc flash protection unit including
complete self-supervision functionality. 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 102 complete system self-supervision function provides the
highest level of dependability by continuously monitoring all internal system
functions along with external connections.
AQ 102 is designed according to the latest protection relay standards and is hence
suitable for installations in rough environments, such as utility, traditional or
renewable power plants, offshore, marine, oil and gas, mining, steel or any other
heavy industry applications and as well commercial and institutional electrical
systems. AQ 102 is suitable for either medium voltage or low voltage switchgear
and motor control center applications in both new and retrofit installations.
2.1 ARC PROTECTION UNIT AQ 102FEATURES
AQ 102 is a multipurpose arc flash protection unit and can be applied for variety of
applications. AQ 102 can be used as a stand-alone unit or as part of a more
complex arc protection system through the binary bus. Main features of AQ 102:
-80-265Vac/dc auxiliary power supply or optional 18-72Vdc power supply
-3 arc fiber loop channels
-2 binary inputs (nominal voltage of 24 or 110 or 220Vdc)
-3 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)
-1 binary output (24Vdc)
-1 system failure relay output
-11 Indication LEDs
-Push-button

Instruction manual –AQ 102 Arc protection unit 7 (45)
Figure 2-1 Arc protection unit AQ 102

Instruction manual –AQ 102 Arc protection unit 8 (45)
2.2 SIMPLIFIED BLOCK DIAGRAM
AQ 102 simplified block diagram in Figure 2-2 shows the main components of the
AQ 102 unit.
Figure 2-2 AQ 102 simplified block diagram

Instruction manual –AQ 102 Arc protection unit 9 (45)
3OPERATION AND CONFIGURATION
3.1 LED INDICATOR FUNCTIONS
AQ 102 contains 11 indication LEDs. A user definable text pocket can be slid in for
identifying each LED function (except Power and Error LEDs). LED’s 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.
The fiber sensor LEDs in inactive condition are off. If an arc fiber 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 LED
the “SET” button should be pressed.
In case that a fiber sensor connection drops off or configuration mismatch
situation is detected by system self-supervision function (new sensor connected
without running auto-configuration system setup, see chapter 3.3.1) the
corresponding LED will start flashing and the ERROR LED will activate.
AQ102 provides a fiber transmitter channel (QD) for connecting Arcteq arc
quenching system type AQ 2000. The QD channel is connected via fiber optic cable
to AQ 2000 quenching system for initiating the rapid arc quenching sequence as a
result of arc fault detection. For more information refer to AQ 2000 arc quenching
system instruction manual.
The Binary I/O LEDs are indicating the I/O-lines 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 3.4.)
All activation and trip indication LEDs are latched, even if the dipswitch setting is in
non-latched mode. They have to be cleared by pushing the “SET” button.

Instruction manual –AQ 102 Arc protection unit 10 (45)
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
power supply loss the actual LED status can be visualized from the front of the unit.
3.2 LED OPERATION QUICK GUIDE
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,T3,T4
Red
Normal status
Trip relays
T1,T3,T4
activated
N/A
Check the reason for trip. Clear the fault and
reset indications by pushing SET button
T2, T4
Red
Normal status
Trip relays T2,
T4 activated
N/A
Check the reason for trip. Clear the fault and
reset indications by pushing SET button
S1
Amber
Normal status
Fiber sensor
channel
activated
Fiber sensor
drops off 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
Fiber sensor
channel
activated
Fiber sensor
drops off 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
Fiber sensor
channel
activated
Fiber sensor
drops off 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)
QD
Amber
Normal status
Quenching
Device channel
activated
Fiber connection
to quenching
system drops off
or system set-up
not performed
Check the fiber connection and/or the
system configuration.
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
Table 3-1: LED operation quick guide

Instruction manual –AQ 102 Arc protection unit 11 (45)
3.3 PUSH-BUTTON DESCRIPTION
AQ 102 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 sensors and binary lines have been connected an auto-configuration
procedure must be executed. The initialization sequence is performed by pressing
the “SET”-button for 2 seconds, and the AQ 102 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.
Note: in order to redo auto-configuration for a unit containing less connections
(binary inputs/outputs or sensors) than in previous memorized set-up a dipswitch
(anyone) must be moved back and forth prior to performing auto-configuration.
Timeout allowing new configuration is 1 minute. Reconfiguration with more
connections is allowed without moving the dipswitch.
3.3.2 RESET
All LED indications and latched trip relays are reset by pressing the “SET” 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 the operator even when auxiliary power supply is disconnected (see
chapter 3.5 Non-volatile memory).

Instruction manual –AQ 102 Arc protection unit 12 (45)
3.3.3 INPUT CONNECTION CHECK
After the auto-configuration procedure is completed, the connectivity of all
sensors and binary input channels can be verified by pressing the push-button 3
times (in 2 seconds). The LED of corresponding sensors and binary input channels
starts to blink while the POWER LED is blinking. The number of LED blinks are exact
same as the number of connected sensors and connected binary output channels
from other units.
3.4 DIPSWITCH SETTINGS
AQ 102 functionality such as tripping logic is configured using dipswitch settings.
Different trip schemes can be easily programmed by selecting the appropriate
dipswitch positions. This gives users the flexibility to change settings dependent on
the demand of application. Tripping may be selected based on arc light only or arc
light and current thresholds (or other tripping criterion such as undervoltage, or
similar). Current thresholds or other tripping criterion may be applied to binary
input BI1 for blocking trip caused by natural light sources. Also the CBFP time can
be selected by dipswitch setting according to the requirement of the CBFP
function. Dipswitches are located at the back of the unit for easy access. See Figure
3-1 AQ 102 dipswitches and Table 3-2 AQ102 dipswitch setting for details of
settings.
Figure 3-1 AQ 102 dipswitches

Instruction manual –AQ 102 Arc protection unit 13 (45)
Dipswitch
Function selection
ON (LEFT
POSITION)
OFF (RIGHT
POSITION)
8
L> / L>+I>
Fiber sensor channels S2
and S3 trip criteria
Trip on light only (L>).
Trip on light and
overcurrent (L> + I>).
Both signals are required
simultaneously to trip.
7
S1: L> / L>+I>
Sensor channel S1 trip
criteria
Trip on light only (L>).
Trip on light and
overcurrent (L> + I>).
Both signals are required
simultaneously to trip.
6
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.
Note: Trip relays T3 and T4 are always latched. Binary
output BO1 function is always non-latched.
5
100 / 150ms
CBFP time setting
CBFP time is set to 100ms.
CBFP time is set to 150ms.
4
Scheme select
Scheme selection
Refer to chapter 3.4.1 and
6
Refer to chapter 3.4.1 and
6
3
Scheme select
Scheme selection
Refer to chapter 3.4.1 and
6
Refer to chapter 3.4.1 and
6
2
Scheme select
Scheme selection
Refer to chapter 3.4.1 and
6
Refer to chapter 3.4.1 and
6
1
Scheme select
Scheme selection
Refer to chapter 3.4.1 and
6
Refer to chapter 3.4.1 and
6
Table 3-2 AQ102 dipswitch setting selection
The chapter 3.4.1 shows AQ102 internal logic and dipswitch selections. For inputs
and outputs descriptions refer to chapter 7.

Instruction manual –AQ 102 Arc protection unit 14 (45)
3.4.1 SCHEME SELECT
This chapter describes the available schemes that are configured using the Scheme
Select 1…4 dip-switches.
•Logic scheme 0
The AQ102 logic scheme 0 can be not only applied as stand-alone arc protection
unit, but also widely used as non-selective outgoing feeder compartment
protection. Depend on this scheme, user can either select light only mode or arc
light + overcurrent mode to trip all circuit breakers. The detailed instruction is
described in AQ SAS™booklet.
Figure 3-2: AQ102 logic scheme 0

Instruction manual –AQ 102 Arc protection unit 15 (45)
•Logic scheme I
The AQ102 logic scheme I is mainly utilized in selective arc protection solution. The
fiber sensor S1 monitors the outgoing feeder cable compartment. The fiber sensor
S2 monitors the corresponding feeder breaker compartment and busbar
compartment. Trip contact T1 is responsible for tripping circuit breaker of the
outgoing feeder. The detailed instruction is described in AQ SAS™booklet.
Figure 3-3: AQ102 logic scheme I

Instruction manual –AQ 102 Arc protection unit 16 (45)
3.5 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.
Non-volatile memory does not require a power supply to maintain information and
will retain settings and indications permanently without power.

Instruction manual –AQ 102 Arc protection unit 17 (45)
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.

Instruction manual –AQ 102 Arc protection unit 18 (45)
Figure 4-1: Arc sensor AQ 01
4.1.1 AQ 01 INSTALLATION AND WIRING
AQ 01 is installed either on the compartment wall or through wall. Example of wall
mounting is seen in Figure 4-2. AQ 01 is fixed to the wall using two screws. The
same screw pattern is utilized in through wall mounting arrangement as well. Unit
is turned around and the eye is pushed to the compartment to be protected and
two screws are attached from the back side of the sensor. No external mounting
plates are needed in any case.

Instruction manual –AQ 102 Arc protection unit 19 (45)
Figure 4-2: AQ 01 mounted to compartment wall.
AQ01 comes without connection cable. Connection cable installation at site is
simple. Cable connectors are located beneath the covers that can be conveniently
detached for fastening the sensor wires. Cover shall be attached after installing the
wires. Cable connectors are located at both ends of the sensor for series
connecting maximum three sensors in one line. See Figure 4-1.

Instruction manual –AQ 102 Arc protection unit 20 (45)
4.1.2 AQ 01 TECHNICAL DATA
Light intensity threshold
8000Lux
Detection radius
180 degrees
Mechanical protection
IP 64
Sensor wiring arrangement
2 wires and shield
Sensor cable specification
Shielded twisted pair 0.75mm²
Maximum sensor cable length per
sensor channel
100 meters
Operating temperature
-20...+85 C
4.2 ARC LIGHT FIBER OPTIC LOOP SENSOR AQ 06
AQ 06 is an arc light fiber optic loop sensor. AQ 06 fiber is a plastic fiber optic
cable. AQ 06 sensors can be ordered in pre-manufactured lengths of 1-40 meters.
AQ 06 fiber sensors are distributed through the protected switchgear cells. AQ 06
is not recommended to be cut and/or spliced on site. If cutting/splicing is
necessary due to accidental breakage, please contact your nearest Arcteq
representative.
The fixed light sensitivity of the AQ06 sensor is 8000 LUX. Sensor does not require
user settings. Detection radius is 360 degrees. See figure 4.3