Ice AP901S User manual

Instruction manual –AP901S Arc Protection Unit 2 (43)
A1027A
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12/09/2018
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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 ICE for any consequences arising out of the use of this material.
We reserve right to changes without further notice.

Instruction manual –AP901S Arc Protection Unit 3 (43)
A1027A
TABLE OF CONTENTS
1ABBREVIATIONS ............................................................................................................. 5
2GENERAL......................................................................................................................... 6
2.1 Arc protection unit AP901S 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
3.4 Reset ..................................................................................................................... 12
3.5 Dipswitch settings .................................................................................................. 12
3.5.1 Scheme select dip-switch settings .................................................................... 14
3.6 Non-volatile memory .............................................................................................. 24
4ARC SENSORS .............................................................................................................. 25
4.1 Sensor Type Dependencies ................................................................................... 25
5SYSTEM SELF-SUPERVISION ...................................................................................... 26
6APPLICATION EXAMPLES ............................................................................................ 27
6.1 MV or LV Double Busbar application with current and light condition ..................... 27
7CONNECTIONS.............................................................................................................. 29
7.1 Outputs .................................................................................................................. 30
7.1.1 Trip relays T1, T2 and T3.................................................................................. 30
7.1.2 Binary output BO1, BO2 and BO3 .................................................................... 30
7.1.3 System failure relay SF..................................................................................... 30
7.2 Inputs ..................................................................................................................... 30
7.2.1 Arc sensor channels S1, S2, S3, and S4 .......................................................... 30
7.2.2 Binary inputs BI1, BI2, BI3, BI4, BI5 and BI6 .................................................... 31
7.3 Auxiliary voltage..................................................................................................... 31
8WIRING DIAGRAM ......................................................................................................... 32
9DIMENSIONS AND INSTALLATION............................................................................... 33
10 TESTING ........................................................................................................................ 35
10.1 Carrying out testing in light only mode.................................................................... 35
10.2 Carrying out testing in light and current mode ........................................................ 36
10.3 Testing arc flash protection unit operation time ...................................................... 37

Instruction manual –AP901S Arc Protection Unit 4 (43)
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10.4 Test plan example.................................................................................................. 38
11 TROUBLESHOOTING GUIDE ........................................................................................ 39
12 TECHNICAL DATA ......................................................................................................... 40
12.1 Protection............................................................................................................... 40
12.2 Auxiliary voltage..................................................................................................... 40
12.3 Trip relays T1, T2, T3............................................................................................. 40
12.4 Binary Output BO1, BO2 and BO3 ......................................................................... 40
12.5 Binary Inputs BI1, BI2, BI3, BI4, BI5 and BI6.......................................................... 41
12.6 Disturbance tests ................................................................................................... 41
12.7 Voltage tests .......................................................................................................... 41
12.8 Mechanical tests .................................................................................................... 42
12.9 Casing and package .............................................................................................. 42
12.10Environmental conditions ....................................................................................... 42

Instruction manual –AP901S Arc Protection Unit 5 (43)
A1027A
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 –AP901S Arc Protection Unit 6 (43)
A1027A
2GENERAL
AP901S 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 AP901S complete
system self-supervision function provides the highest level of dependability by continuously
monitoring all internal system functions along with external connections.
AP901S 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,
off shore, marine, oil and gas, mining, steel or any other heavy industry applications and as
well commercial and institutional electrical systems. AP901S is suitable for either medium
voltage or low voltage switchgear and motor control centre applications in both new and retrofit
installations.
2.1 ARC PROTECTION UNIT AP901SFEATURES
AP901S is a multipurpose arc flash protection unit and can be applied for variety of applications
that requires a large number of data communication. AP901S 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 AP901S, see Figure 2-1:
-80-265Vac/dc auxiliary power supply or optional 18-72Vdc power supply
-4 arc point sensor channels
-6 binary inputs (nominal voltage of 24 or 110 or 220Vdc)
-3 normally open trip relay outputs (direct trip circuit rated)
-3 binary outputs (24Vdc)
-1 system failure relay output
-17 Indication LEDs
-Push-button

Instruction manual –AP901S Arc Protection Unit 7 (43)
A1027A
Figure 2-1: AP901S Arc protection IO unit

Instruction manual –AP901S Arc Protection Unit 8 (43)
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2.2 SIMPLIFIED BLOCK DIAGRAM
AP901S simplified block diagram in Figure 2-2 shows the main components of the AP901S
unit.
Figure 2-2: AP901S simplified block diagram

Instruction manual –AP901S Arc Protection Unit 9 (43)
A1027A
3OPERATION AND CONFIGURATION
3.1 LED INDICATOR FUNCTIONS
AP901S contains 17 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 sensor LEDs in inactive condition are off. If an 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 LED the “SET” button should be
pressed.
In case of a loose sensor wire and binary inputs 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 the 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 3.5)
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.
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.

Instruction manual –AP901S Arc Protection Unit 10 (43)
A1027A
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 chapter
11: Troubleshooting guide and
chapter 5: System self-supervision
T1,T3
Red
Normal status
Trip relays T1,T3
activated
N/A
Check the reason for trip. Clear the
fault and reset indications by pushing
SET button
T2, T3
Red
Normal status
Trip relays T2,T3
activated
N/A
Check the reason for trip. Clear the
fault and reset indications by pushing
SET button
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.
BI3
Amber
Normal status
Binary input 3
activated
Binary input 3 loose
connection
Check the binary input wiring.
BI4
Amber
Normal status
Binary input 4
activated
Binary input 4 loose
connection
Check the binary input wiring.
BI5
Amber
Normal status
Binary input 5
activated
Binary input 5 loose
connection
Check the binary input wiring.
BI6
Amber
Normal status
Binary input 6
activated
Binary input 6 loose
connection
Check the binary input wiring.
BO1
Amber
Normal status
Binary Output
activated
N/A
BO2
Amber
Normal status
Binary Output
activated
N/A
BO3
Amber
Normal status
Binary Output
activated
N/A
S1
Amber
Normal status
Sensor channel 1
activated by light
information
Sensor channel 1
loose connection or
system set-up not
performed; also
activated by pressure
information
Check why sensor activated or check
the sensor wire connection or
perform system set-up (see chapter:
3.3.1 Auto configuration (system
setup)
S2
Amber
Normal status
Sensor channel 2
activated by light
information
Sensor channel 2
loose connection or
system set-up not
performed; also
activated by pressure
information
Check why sensor activated or check
the sensor wire connection or
perform system set-up (see chapter:
3.3.1 Auto configuration (system
setup)

Instruction manual –AP901S Arc Protection Unit 11 (43)
A1027A
S3
Amber
Normal status
Sensor channel 3
activated by light
information
Sensor channel 3
loose connection or
system set-up not
performed; also
activated by pressure
information
Check why sensor activated or check
the sensor wire connection or
perform system set-up (see chapter:
3.3.1 Auto configuration (system
setup)
S4
Amber
Normal status
Sensor channel 4
activated by light
information
Sensor channel 4
loose connection or
system set-up not
performed; also
activated by pressure
information
Check why sensor activated or check
the sensor wire connection or
perform system set-up (see chapter:
3.3.1 Auto configuration (system
setup)
Table 3-1: LED operation quick guide
3.3 PUSH-BUTTON DESCRIPTION
AP901S 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 AP901S sensor LEDs and all binary 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 dipswitches 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 dip-switch.

Instruction manual –AP901S Arc Protection Unit 12 (43)
A1027A
3.4 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 3.6 Non-volatile memory).
3.5 DIPSWITCH SETTINGS
AP901S 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 application. Tripping may be
selected based on arc light only or arc light and current thresholds (or other tripping criteria
such as undervoltage, or similar). Current threshold or other tripping criteria may be applied to
binary input BI1 for blocking trip caused by natural light sources. Also the CBFP scheme may
be enabled using the dipswitches (the dipswitch number 4 is enabling CBFP function for
corresponding scheme selection). The dipswitch number 1...4 are used as scheme selection.
The scheme number is according to binary arithmetic. Dipswitches are located at the back of
the unit for easy access. See Figure 3-1: AP901S dipswitch and Table 3-2 AP901S dipswitch
setting for details of settings.
Figure 3-1: AP901S dipswitches

Instruction manual –AP901S Arc Protection Unit 13 (43)
A1027A
Dipswitch
Function selection
ON (LEFT
POSITION)
OFF (RIGHT
POSITION)
8
L> / L>+I>
Sensor channels S2, S3,
S4 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 relay T3 is 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
The scheme with CBFP
function.
Scheme selection number
is according to binary
arithmetic.
The scheme without CBFP
function.
Scheme selection number
is according to binary
arithmetic.
3
Scheme select
Scheme selection
Scheme selection number
is according to binary
arithmetic.
Scheme selection number
is according to binary
arithmetic.
2
Scheme select
Scheme selection
Scheme selection number
is according to binary
arithmetic.
Scheme selection number
is according to binary
arithmetic.
1
Scheme select
Scheme selection
Scheme selection number
is according to binary
arithmetic.
Scheme selection number
is according to binary
arithmetic.
Table 3-2 AP901S dipswitch setting selection

Instruction manual –AP901S Arc Protection Unit 14 (43)
A1027A
3.5.1 SCHEME SELECT DIP-SWITCH SETTINGS
This chapter describes the available schemes that are configured using the Scheme Select
1…4 dip-switches.
Logic scheme 1
The AP901S scheme 1 is utilized in selective arc protection solution. The point sensor S1
monitors the outgoing feeder cable compartment. S2 is used for monitoring the
corresponding feeder breaker compartment. S3 and S4 monitor the busbar compartment.
The contact T1 is responsible for tripping circuit breaker of the outgoing feeder. BI3 receives
overcurrent information from the AP910P of incoming feeder. BO1 sends light information
to AP910P of incoming feeder when there is any arc fault detected by AP901S.
Figure 3-2: AP901S logic scheme 1
General trip logic for AP901S (SS: 1)
TRIPPING SIGNALS
FAULT LOCATION
T1
T2
T3
BO1
BO2
BO3
S1
╳
╳
S2
╳
╳
╳
S3
╳
╳
S4
╳
╳
╳

Instruction manual –AP901S Arc Protection Unit 15 (43)
A1027A
Logic scheme 2
The AP901S scheme 2 is utilized in selective arc protection solution. S2 is used for
monitoring the incoming feeder breaker compartment. S3 monitors reserve busbar; S4
monitors the main busbar compartment. The contact T1 is responsible for tripping section
circuit breaker. T2 is responsible for tripping coupler circuit breaker. BI1 and BI2 are
responsible for recognizing the incoming circuit breaker position. BI3 receives overcurrent
information from the AP910P of incoming feeder. BI4, BI5 and BI6 are used for sending
light information from different location of the busbar. BO1, BO2 and BO3 send arc fault
information to incoming feeder units and intermediate units.
Figure 3-3: AP901S logic scheme 2
General trip logic for AP901S (SS: 2)
TRIPPING SIGNALS
FAULT LOCATION
T1
T2
T3
BO1
BO2
BO3
S2
╳
╳
╳
╳
╳
╳
S3
╳
╳
╳
╳
S4
╳
╳
╳
╳
╳

Instruction manual –AP901S Arc Protection Unit 16 (43)
A1027A
Logic scheme 3
The AP901S scheme 3 is very similar to scheme 2. S2 is used for monitoring the incoming
feeder breaker compartment. S3 monitors reserve busbar; S4 monitors the main busbar
compartment. The contact T1 is responsible for tripping section circuit breaker. T2 is
responsible for tripping coupler circuit breaker. BI1 and BI2 are responsible for recognizing
the incoming circuit breaker position. BI3 receives overcurrent information from the AP910P
of incoming feeder. BI4, BI5 and BI6 are used for sending light information from different
location of the busbars. BO1, BO2 and BO3 send arc fault information to incoming feeder
units and intermediate units.
Figure 3-4 AP901S logic scheme 3
General trip logic for AP901S (SS: 3)
TRIPPING SIGNALS
FAULT LOCATION
T1
T2
T3
BO1
BO2
BO3
S2
╳
╳
╳
╳
╳
╳
S3
╳
╳
╳
╳
S4
╳
╳
╳
╳

Instruction manual –AP901S Arc Protection Unit 17 (43)
A1027A
Logic Scheme 4
The AP901S scheme 4 is used as intermediate unit. Sensors are monitoring section circuit
breaker and the busbar between the section circuit breaker. BI3 and BI4 receive over
current information from two main busbar sections reprehensively. BO1 and BO3 represent
the arc fault detected at both main busbar sections.
Figure 3-5: AP901S logic scheme 4
General trip logic for AP901S (SS: 4)
TRIPPING SIGNALS
FAULT LOCATION
T1
T2
T3
BO1
BO2
BO3
S1
╳
╳
╳
S2
╳
╳
╳
╳
╳
S3
╳
╳
╳
S4
╳
╳
╳

Instruction manual –AP901S Arc Protection Unit 18 (43)
A1027A
Logic Scheme 5
The AP901S scheme 5 is used in single busbar arc protection solution. Sensors are
monitoring section circuit breaker and the busbar between the section circuit breaker. BI1
and BI2 receive MT signal from both incoming AP910P units. BI3 and BI4 receive
overcurrent information from both incoming AP910P units. BO1 and BO3 sends detected
arc fault information from busbar and section CB to both incoming AP910P units.
Figure 3-6: AP901S logic scheme 5
General trip logic for AP901S (SS: 5)
TRIPPING SIGNALS
FAULT LOCATION
T1
T2
T3
BO1
BO2
BO3
S1
╳
╳
╳
╳
S2
╳
╳
╳
╳
╳
S3
╳
╳
╳
╳
S4
╳
╳
╳
╳

Instruction manual –AP901S Arc Protection Unit 19 (43)
A1027A
Logic Scheme 6
The AP901S scheme 6 is used in double busbar without BS & BC arc protection solution.
Sensors are monitoring incomer circuit breaker, main busbar and reserve busbar. S2
monitors incomer CB. S3 monitors reserve busbar and S4 monitors main busbar. BI1 and
BI2 are responsible for recognizing the incoming circuit breaker position. BI3 receives
overcurrent information from the AP910P of incoming feeder. BI4, BI5 and BI6 are used for
sending light information from different location of the busbar.
Figure 3-7: AP901S logic scheme 6

Instruction manual –AP901S Arc Protection Unit 20 (43)
A1027A
Logic Scheme 7
The AP901S scheme 7 is utilized in selective arc protection solution. The point sensor S1
monitors the outgoing feeder cable compartment. S2 is used for monitoring the
corresponding feeder breaker compartment. S3 and S4 monitor the busbar compartment.
The contact T1 is responsible for tripping circuit breaker of the outgoing feeder. BI3 receives
overcurrent information from the AP910P of incoming feeder. BO1 sends light information
to AP910P of incoming feeder when there is any arc fault detected by AP901S.
Figure 3-8: AP901S logic scheme 7