Ice AP901 User manual
Instruction manual –AP901 Arc Protection Unit 2 (39)
A1017B
Revision
Date
Changes
Written by
Checked by
A
22/01/2018
First issue
HWE
GBI
B
28/05/2018
Update
HWE
GBI
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 –AP901 Arc Protection Unit 3 (39)
A1017B
TABLE OF CONTENTS
1ABBREVIATIONS ............................................................................................................. 5
2GENERAL......................................................................................................................... 6
2.1 Arc protection unit AP901 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 ..................................................................................................................... 11
3.5 Dipswitch settings .................................................................................................. 12
3.5.1 Scheme select dip-switch settings .................................................................... 14
3.6 Non-volatile memory .............................................................................................. 16
4ARC SENSORS .............................................................................................................. 17
4.1 Sensor Type Dependencies ................................................................................... 17
5SYSTEM SELF-SUPERVISION ...................................................................................... 18
6APPLICATION EXAMPLES ............................................................................................ 19
6.1 MV or LV application with current and light condition.............................................. 19
6.2 Wind-power application example (light only condition) ........................................... 21
6.3 Circuit breaker failure protection (CBFP)................................................................ 23
7CONNECTIONS.............................................................................................................. 24
7.1 Outputs .................................................................................................................. 25
7.1.1 Trip relays T1 and T2........................................................................................ 25
7.1.2 Trip relays T3 and T4........................................................................................ 25
7.1.3 Binary output BO1 ............................................................................................ 25
7.1.4 System failure relay SF..................................................................................... 26
7.2 Inputs ..................................................................................................................... 26
7.2.1 Arc sensor channels S1, S2, S3, S4 and S5..................................................... 26
7.2.2 Binary inputs BI1 and BI2 ................................................................................. 26
7.3 Auxiliary voltage..................................................................................................... 27
8WIRING DIAGRAM ......................................................................................................... 28
9DIMENSIONS AND INSTALLATION............................................................................... 29
10 TESTING ........................................................................................................................ 31
Instruction manual –AP901 Arc Protection Unit 4 (39)
A1017B
10.1 Carrying out testing in light only mode.................................................................... 31
10.2 Carrying out testing in light and current mode ........................................................ 32
10.3 Testing the CBFP function ..................................................................................... 33
10.4 Testing arc flash protection unit operation time ...................................................... 33
10.5 Test plan example.................................................................................................. 34
11 TROUBLESHOOTING GUIDE ........................................................................................ 35
12 TECHNICAL DATA ......................................................................................................... 36
12.1 Protection............................................................................................................... 36
12.2 Auxiliary voltage..................................................................................................... 36
12.3 Trip relays T1, T2, T3, T4....................................................................................... 36
12.4 Binary Output BO1 ................................................................................................. 36
12.5 Binary Inputs BI1, BI2............................................................................................. 37
12.6 Disturbance tests ................................................................................................... 37
12.7 Voltage tests .......................................................................................................... 37
12.8 Mechanical tests .................................................................................................... 38
12.9 Casing and package .............................................................................................. 38
12.10Environmental conditions ....................................................................................... 38
Instruction manual –AP901 Arc Protection Unit 5 (39)
A1017B
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 –AP901 Arc Protection Unit 6 (39)
A1017B
2GENERAL
AP901 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 AP901 complete system
self-supervision function provides the highest level of dependability by continuously monitoring
all internal system functions along with external connections.
AP901 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. AP901 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 AP901 FEATURES
AP901 is a multipurpose arc flash protection unit and can be applied for variety of applications.
AP901 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 AP901:
-80-265Vac/dc auxiliary power supply or optional 24-72Vdc power supply
-4 arc point sensor channels
-1 arc fiber loop channel (optional)
-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
-12 Indication LEDs
-Push-button
Instruction manual –AP901 Arc Protection Unit 7 (39)
A1017B
Figure 2-1: Arc protection unit AP901
Instruction manual –AP901 Arc Protection Unit 9 (39)
A1017B
3OPERATION AND CONFIGURATION
3.1 LED INDICATOR FUNCTIONS
AP901 contains 12 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 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 –AP901 Arc Protection Unit 10 (39)
A1017B
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
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)
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-(see chapter: 3.3.1)
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)
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)
S5
Amber
Normal status
Fiber sensor
channel activated
Fiber sensor loose
connection or system
set-up not performed
Check why sensor activated or
check the sensor continuity or
perform system set- (see
chapter: 3.3.1)
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 –AP901 Arc Protection Unit 11 (39)
A1017B
3.3 PUSH-BUTTON DESCRIPTION
AP901 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 AP901 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 dip-switch (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.
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).
Instruction manual –AP901 Arc Protection Unit 12 (39)
A1017B
3.5 DIPSWITCH SETTINGS
AP901 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. Dipswitches are located at the back of the unit for easy
access. See Figure 3-1: AP901 dipswitches and Table 3-2 AP901 dipswitch setting selection
for details of settings.
Figure 3-1: AP901 dipswitches
Instruction manual –AP901 Arc Protection Unit 13 (39)
A1017B
Dipswitch
Function selection
ON (LEFT
POSITION)
OFF (RIGHT POSITION)
8
L> / L>+I>
Sensor channels S2, S3,
S4 and FIBER channel
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 3.5.1 and
6
Refer to chapter 3.5.1 and 6
3
Scheme select
Scheme selection
Refer to chapter 3.5.1 and
6
Refer to chapter 3.5.1 and 6
2
Scheme select
Scheme selection
Refer to chapter 3.5.1 and
6
Refer to chapter 3.5.1 and 6
1
Scheme select
Scheme selection
Refer to chapter 3.5.1 and
6
Refer to chapter 3.5.1 and 6
Table 3-2 AP901 dipswitch setting selection
The chapter 3.5.1 shows AP901 internal logic and dipswitch selections. For input and output
descriptions refer to chapter 7.
Instruction manual –AP901 Arc Protection Unit 14 (39)
A1017B
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 0
The AP901 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 select either light only mode or arc light + overcurrent mode to trip all circuit
breakers. The detailed instruction is described in “AP SAS ™Standard Arc Schemes -
Instruction booklet”.
Figure 3-2: AP901 logic scheme 0
Instruction manual –AP901 Arc Protection Unit 15 (39)
A1017B
General trip logic for AP901 (SS: 0)
TRIPPING SIGNALS
FAULT LOCATION
T1
T2
T3
T4
BO1
S1
╳
╳
╳
╳
╳
S2
╳
╳
╳
╳
╳
S3, S4, S5
╳
╳
╳
╳
╳
BI1
╳
╳
╳
╳
BI2
╳
╳
╳
╳
Logic scheme 1
The AP901 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 “AP SAS™Standard Arc Schemes - Instruction booklet”.
Figure 3-3: AP901 logic scheme 1
Instruction manual –AP901 Arc Protection Unit 16 (39)
A1017B
General trip logic for AP901 (SS: 1)
TRIPPING SIGNALS
FAULT LOCATION
T1
T2
T3
T4
BO1
S1
╳
╳
╳
S2
╳
╳
S3, S4, S5
╳
╳
BI1
╳
╳
╳
BI2
╳
╳
╳
╳
3.6 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 –AP901 Arc Protection Unit 17 (39)
A1017B
4ARC SENSORS
AP900 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. The
detailed instructions are described in “Arc Sensors Series –Instruction booklet”.
4.1 SENSOR TYPE DEPENDENCIES
Different sensor types can be utilized with the AP901 arc flash protection unit. The table below
describes the dependencies.
AS01
AS02
AS06
AS07
AP901
Yes
Yes
Yes (with fiber option)
Yes (with fiber option)
Table 4-1: Arc sensor dependencies
Instruction manual –AP901 Arc Protection Unit 18 (39)
A1017B
5SYSTEM SELF-SUPERVISION
AP901 includes an extensive self-supervision feature. Self-supervision includes both internal
functions and external connections. The self-supervision module monitors power supply, HW
and SW malfunctions and binary input connection and sensor problems. Dipswitch settings
are also supervised by comparing actual value with stored Non-volatile memory data (see
chapter 3.3.1)
In a healthy condition the power LED is on and the System failure (SF) relay is energized. If
the self-supervision function detects a faulty condition or the power supply fails the self-
supervision relay is released and the ERROR LED is lit.
If a sensor failure occurs, the unit will go into ERROR mode. The error LED will turn on, the
SF relay will release and the corresponding faulty sensor channel LED will start blinking. In
this situation the unit is still in protection mode, but with the faulty sensor channel blocked. If
the error is resolved the unit will automatically clear the SF-status. This means that SF relay
will energize and the error led will turn off. If one or more of the sensors are disconnected the
healthy sensors remain in use and unit remains operational accordingly. The AP901 will
remain in error mode until the disconnected sensors are repaired.
If a dip switch setting is changed after the auto-configuration function (see chapter 3.3.1) has
been executed, the unit will go into SF-alarm mode. The configured (stored) setting is however
still valid and the unit is still operational.
Instruction manual –AP901 Arc Protection Unit 19 (39)
A1017B
6APPLICATION EXAMPLES
AP901 may be applied to a variety of power switchgear and control gear layouts and
technologies. Some typical applications are described in this section. Please consult your
nearest ICE representative for a solution to your particular application.
6.1 MV OR LV APPLICATION WITH CURRENT AND LIGHT CONDITION
AP901 may be applied requiring both overcurrent and arc light conditions for trip. In this case
tripping is performed only if both conditions are fulfilled simultaneously. Typically the
overcurrent condition is obtained from the AP910 unit and the trip relay will be activated in
7ms. The overcurrent condition may be monitored by NP900 Series protection relays and the
total operation time is then dependent on device feeding the overcurrent signal to AP901.
The sensor channel S1 can be set to operate on light only even if other channels operate on
both conditions of arc light and overcurrent.
Figure 6-1 shows an example of a system applying both overcurrent and arc light for tripping
from the sensor channels S2, S3 and S4 activations and arc light only from sensor channel S1
activation. S1 channel is monitoring the transformer feeder bus duct above the current
monitoring point. Maximum three arc light point sensors type AS01 can be connected to each
sensor channel.
The current monitoring signal is in this application coming from an external overcurrent relay.
Instruction manual –AP901 Arc Protection Unit 20 (39)
A1017B
Figure 6-1:
LV or MV application by AP901.
This LV or MV application example has light and current tripping criteria for sensor channels
S2, S3 and S4. The sensor channel S1 monitoring the zone before CT is set to operate on
light only. The current threshold monitoring signal may come either from an external
overcurrent relay or from AP910 arc protection unit. In this example an overcurrent relay
(50/51) is applied to monitor the overcurrent condition.
Table of contents
