ABB CSU-2LV Product manual

— Arc Guard System™ – CSU-2LV/2MV Installation and maintenance guide
—
1SFC170020M0201 EN, REV B
Arc Guard System™ – CSU-2LV/2MV
Installation and maintenance guide

Thank you for selecting the ABB TVOC-2 Arc Guard
System™. Carefully read and make sure that you
understand all instructions before you mount, connect,
configure the CSU-2.
This manual is intended for installation and maintenance
of the CSU-2 Current Sensing Unit.
The manual is available on:
http://new.abb.com/low-voltage/products/arc-guard
• Only authorized and appropriately trained personnel
are allowed to install and make the electrical
connection of the Arc Guard System™ in accordance
with existing laws and regulations.
• Only authorized personnel are allowed to do service
and repair on the Arc Guard System.
• Unauthorized repair will affect the warranty.
• This manual is a part of the CSU-2 Current Sensing
Unit. Always keep this manual available when working
with the CSU-2.
• Examine the Arc Guard System™ and the package
when you unpack your new product. If there are
damages, please contact the transportation company
or the ABB reseller/office immediately.
Safety notes
In this user manual, these symbols are used:
WARNING
General warning symbol indicates the presence
of a hazard which could result in personal injury
and damage to equipment or property.
WARNING
Warning symbol indicates the presence of
hazardous voltage which could result in
personal injury.
INFORMATION
Information sign alerts the reader to relevant
facts and conditions.
Modifications to data in this manual can be applied
without notice.
General safety information
WARNING
Only authorized and appropriately trained
personnel are allowed to install and make the
electrical connection of the Arc Guard System™
in accordance with existing laws and regulations.
WARNING
Examine the Arc Guard System™ and the
package when you unpack your new product.
If there are damages, please contact the
transportation company or the ABB reseller/
office immediately.
WARNING
Only authorized and appropriately trained
service personnel are allowed to do service
and repair on the Arc Guard System. Note:
unauthorized repair will affect the warranty.
Personal
Service and repair should be performed
by authorized personnel only. Note that
unauthorized repair affects safety and warranty.
—
Read this first
Warning and safety

—
Arc Guard System™ –
CSU-2LV/2MV
Installation and
maintenance guide
ABOUT ARC GUARD
SYSTEM™
P. 7
HUMAN MACHINE
INTERFACE (HMI)
P. 31
SAFETY
P. 9
MODBUS
P. 39
CURRENT SENSING
UNIT, CSU-2
P. 13
INSTALL ATION
P. 19
01010203040506
MAINTENANCE
P. 67
TECHNICAL DATA
P. 77
TROUBLESHOOTING
P. 71
070809

ABB ARC GUARD SYSTEM™ – CSU-2LV/2MV INSTALLATION AND MAINTENANCE GUIDE 7
01010101
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1 About Arc Guard System™
Arc Guard System™ quickly detects an arc and trips
the incoming circuit-breaker. Using light as the main
condition, Arc Guard System™ trips instantaneously.
Thanks to this key functional advantage, it overrides
all other protections and delays, which is crucial when
reaction times need to be measured in milliseconds.
The Arc Guard System™ consists of the Arc Monitor TVOC-2,
optical sensor and Current Sensing Unit CSU-2. Optical
sensors used for detection of the arc and optional current
sensing unit for detection of over current.
One or more current sensing units CSU-2 can be added to
the system as a measure to prevent unintentional tripping
from strong light, for example, the sun.
The basic function acts in three phases:
• Detection is light passing through an optical sensor.
• Recognition is the Arc Monitor determining the
intensity of light and optionally Current Sensing Unit
determining over current.
• Action is the trip contact closing.

ABB ARC GUARD SYSTEM™ – CSU-2LV/2MV INSTALLATION AND MAINTENANCE GUIDE 9
02
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2 Safety
10 2.1 Introduction
10 2.2 Applicable safety standards
10 2.2.1 Safety standards
10 2.2.2 Personal safety
10 2.3 Safety signs
11 2.4 Work in safety manner
11 2.4.1 Handling the CSU-2
11 2.4.2 Storage
11 2.4.3 Limitation of liability
11 2.5 Security guidelines
11 2.5.1 Security disclaimer
11 2.5.2 Risk Mitigation and Secure Deployment

10 ABB ARC GUARD SYSTEM™ – CSU-2LV/2MV INSTALLATION AND MAINTENANCE GUIDE
2.1 Introduction
This chapter describes the safety principles and
procedures to be used when working with the Arc Guard
System™ or the CSU-2. It does not cover how to design
for safety nor how to install safety related equipment. The
chapter first presents the applicable safety standards.
Finally the chapter finishes with information about how to
work in a safety manner.
2.2 Applicable safety standards
2.2.1 Safety standards
The CSU-2 has improved safety to fulfill the safety
standards specified in the following directives:
Table 1 Safety standards
Directive Description
2006/95/EC Low voltage equipment
2004/108/EC Electromagnetic compatibility
2.2.2 Personal safety
INFORMATION
This product has been designed for environment
A. Use of this product in environment B may
cause unwanted electromagnetic disturbances
in which case the user may be required to take
adequate mitigation measures.
• Environment A relates to low-voltage nonpublic
or industrial networks, locations and installations
including highly disturbing sources.
• Environment B relates to low-voltage public networks
such as domestic, commercial and light industrial
locations, installations. Highly disturbing sources such
as arc welders are not covered by this environment.
To ensure safety and quality the CSU-2 has been tested
according to the following standards:
Table 2 Safety standards
Directive Description
IEC/EN 60947-1 Low-voltage switchgear and
controlgear - General
IEC/EN 60947-5-1 Low-voltage switchgear and
controlgear - Control circuit devices
and switching elements
IEC 61000-6-2 (2005) Electromagnetic compatibility (EMC) -
Immunity for industrial
environments
IEC 61000-6-4 (2006) Electromagnetic compatibility (EMC)
- Emission standard for industrial
environments
IEC 61326-1 (2005)
IEC 61326-3-1
Electrical equipment for measurement
and control Electrical equipment,
control and laboratory use (EMC)
IEC TS 61000-6-5 Electromagnetic compatibility -
immunity power stations
and substation environments
2.3 Safety signs
This section specifies all dangers that may arise from
performing the work detailed in the manual.
WARNING
Caution symbol indicates the presence of a
hazard which could result in personal injury.
WARNING
Warning symbol indicates the presence of
a hazard which could result in damage to
equipment or property.
Make sure that the supply voltage has been switched off
before connecting!
Working with high voltage is potentially lethal. Persons
subjected to high voltage may suffer cardiac arrest, burn
injuries, or other severe injuries. To avoid these hazards,
do not proceed working before removing the power to the
Arc Guard System.
Arc Guard System™ and CSU-2 are designed to protect
people and installation equipment. Install your system
components and CSU-2 before supplying power.
INFORMATION
Information sign alerts the reader to relevant
facts and conditions.
02

ABB ARC GUARD SYSTEM™ – CSU-2LV/2MV INSTALLATION AND MAINTENANCE GUIDE 11
2.4 Work in safety manner
Safe working methods must be used to prevent injuries.
The safety equipment must not be disengaged, bypassed
or in any other way modified so that the safety effect
ceases.
2.4.1 Handling the CSU-2
The CSU-2 may only be used for the purposes mentioned
in this manual. The CSU-2 was developed, manufactured,
tested and documented in accordance with applicable
safety standards. If you follow the instructions regarding
safety and use as described in this manual, the product
will, in the normal case, neither cause personal injury nor
damage to machinery and equipment.
To avoid malfunctions or damage through improper
handling, follow these instructions during transportation,
installation and maintenance:
• Transport with care. Do not drop, throw, or give the
CSU-2 a strong shock. It can cause breakage or failure.
• Handle with care. Do not drop, throw, or give the CSU-2
a strong shock. It can cause breakage or failure.
• The CSU-2 is installed by authorized personnel only.
• This manual is a part of the CSU-2 and should always
be accessible to personnel working with this product.
• Read and understand the manual thoroughly before
performing any installation or commissioning.
• CSU-2 is constantly sending light to the CSU input at
the Arc Monitor during normal conditions (for safety
and reliability reasons). The light might decrease over
time and should be checked every year by a manual
diagnostic test. See more information in chapter
Maintenance and in HMI functions.
• A log is kept that indicates if the light level had
decreased below a certain level. If so, the CSU-2 should
be replaced within the next 6 months.
• The safety of the system will not be affected if the
CSU-2 is not replaced. However, when the light level
becomes too low then the Arc Monitor will recognize
this as a high current situation. And then the system
functions as if there was a no current condition, that is,
trip on light at optical detectors only.
2.4.2 Storage
Storage in original package requires a temperature
range of between, -25 C° to +70 C° (-13F to + 158F) and a
humidity maximum 95%.
2.4.3 Limitation of liability
The safety information in this manual must not be
considered as a guarantee from ABB that the equipment
cannot cause accidents or injury, even if all the safety
instructions have been observed.
2.5 Security guidelines
2.5.1 Security disclaimer
This product is designed to be connected to and to
communicate information and data via a network
interface. It is your sole responsibility to establish and
maintain any appropriate measures (such as but not
limited to the installation of firewalls, application of
authentication measures, encryption of data, installation
of anti-virus programs, etc.) to protect the product, the
network, its system and the interface against any kind
of security breaches, unauthorized access, interference,
intrusion, leakage and/or theft of data or information.
ABB Ltd and its affiliates are not liable for damages
and/or losses related to such security breaches, any
unauthorized access, interference, intrusion, leakage and/
or theft of data or information.
2.5.2 Risk Mitigation and Secure
Deployment
To prevent equipment to operate in an unsafe or
undesirable manner due to malicious activities the
CSU-2 unit must be positioned in a trusted network,
strictly limited and in a hosted portion of a network or
control system. When a Serial to Ethernet Converter is
used, the user is responsible for creating a defence-in-
depth protection for each network by allocating firewall
solutions to the front of internal trusted networks of
each network by manage firewalls, their configurations
and access rules. For secure remote access, use a
VPN connection with an encryption layer to create a
secure channel over an insecure network. Separate the
management systems and connections to separate
network segments with all necessary cybersecurity
features on and deny all other connectivity mechanisms
from automation systems to restrict unauthorized
access. The user of the product should be aware that the
unsecure nature of the serial Modbus protocol exposes
the communication between the product and the control
system. Authentication and integrity of transmitted
information is not provided by the protocol. The main
security is provided through monitoring the cybersecurity,
topology (asset management) and correct operation of
the data networks using the cybersecurity monitoring
modules and features of the firewalls and managed
switches.
02

ABB ARC GUARD SYSTEM™ – CSU-2LV/2MV INSTALLATION AND MAINTENANCE GUIDE 13
03
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3 Current Sensing Unit,
CSU-2
14 3.1 Introduction
14 3.2 Overview of CSU-2
15 3.2.1 CSU-2
15 3.2.2 Human Machine Interface, HMI
15 3.2.3 Current Sensor Inputs
15 3.2.4 Optical Outputs
15 3.2.5 Over Current and Current Warning
15 3.2.6 Signal Relay
16 3.2.7 Current Sensors
16 3.2.8 Event Logs
16 3.2.9 Backup
16 3.2.10 Home button
16 3.2.11 LED descriptions

14 ABB ARC GUARD SYSTEM™ – CSU-2LV/2MV INSTALLATION AND MAINTENANCE GUIDE
3.1 Introduction
This chapter describes the functions available in the CSU-2.
The chapter is divided in two parts:
• Overview of the CSU-2.
• Functions of the CSU-2.
3.2 Overview of CSU-2
The CSU-2 consists of:
Figure 1
CSU-2 overview
2
12
13
5
6
8
7
1
9
10
11
4
3
Table 3 Overview of CSU-2
Number Part Number Part
1Human Machine Interface, HMI 8Current sensor inputs
2CSU-2 9Power LED (Green)
3CSU-2, Optical Input 10 Over Current LED (Red)
4CSU-2/TVOC-2, Optical Outputs 11 Error LED (Red)
5Power supply 12 Communication LED (Yellow)
6Modbus 13 Home Button
7Over current relay K1
03

ABB ARC GUARD SYSTEM™ – CSU-2LV/2MV INSTALLATION AND MAINTENANCE GUIDE 15
3.2.1 CSU-2
The Current Sensing Unit (CSU-2) is an accessory needed
in specific applications where strong light is expected on
a regular basis. Current Sensing Units are connected with
an optical cable using a light as signal for normal current.
If the connection to CSU-2 is lost an error message will
appear on the TVOC-2 HMI display after 10 seconds.
The safety function of the Arc Guard System™ will not
be affected.
3.2.2 Human Machine Interface, HMI
The Human Machine Interface is used for all
communication with the user and also to confirm any
changes. The HMI has a non-erasable memory that holds
trip logs and error logs even after power loss including a
time stamp.
3.2.3 Current Sensor Inputs
Current sensors are connected to the CSU-2 through the
four connectors. There are four inputs: L1, L2, L3, N.
3.2.4 Optical Outputs
This optical output shall be connected to the Arc Monitor
or another CSU-2 unit. Light ON indicates a normal current
level. If there is an ongoing over current event or an
internal error the light is OFF.
3.2.5 Over Current and Current Warning
Over current occurs when the current level is above the set
over current threshold level. The current warning occurs
when the current level is above the set current warning
threshold level. It is recommended to set the current
warning threshold level to be lower than over current
threshold level as in Figure 2. Over current provides a “fast
trip”. When over current is detected, over current LED in
“Table 3 Overview of CSU-2” on page 14 is turned RED
and Relay K1 is set. The current warning is not designed to
provide a quick warning, only to alert the user of abnormal
levels of current. Auto reset function resets the over
current event after the over current level is below the set
threshold level.
3.2.6 Signal Relay
The Over current relay K1 is used to signal when over
current occurs. The relay can be used to activate an alarm
or to pass the trip information to a supervising system.
If the system is configured for manual reset, K1 is
energized until the user resets in the trip notification
window on the Human Machine Interface (HMI). If the
system is configured for auto reset, K1 is de-energized
250-750 ms after the current level is below the set
threshold level.
Figure 2
Over Current and Current Warning
1SFC170020M0201
OC threshhold
CW threshhold
CW
OC (autoreset)
250–750 ms
OC (without autoreset)
03

16 ABB ARC GUARD SYSTEM™ – CSU-2LV/2MV INSTALLATION AND MAINTENANCE GUIDE
3.2.7 Current Sensors
The current sensors are based on the principle of
the Rogowski coil. The sensors consist of an air-core
winding, immune to any risk of saturation as they have no
ferromagnetic core. The measurement is linear over the
whole measuring range. The output signal is a voltage,
which is proportional to the derivative of the current.
3.2.8 Event Logs
The event log is divided into 4 parts, “Over current”,
“Current warning”, “Error”, “Parameter change”, each
displaying info of their type.
Each event log holds the 10 last events of its type when
each individual event log is full, the oldest event will be
removed upon the arrival of a new event of that type.
The “Combined” event log will show all events sorted upon
the time of occurrence, this log shows a maximum of 4 x
10 = 40 events.
Even if the internal time of the CSU-2 has been reset
or changed, the events in all of the logs will always be
presented in correct order after the time of occurrence.
3.2.9 Backup
CSU-2 saves all parameters internally but has no built
in support for backups. To ensure that the device can
be restored to a known good state, manual backup of
parameters via display and or Modbus has to be performed
(parameters “automatic reset”, “language” and “brightness”
can not be accessed via Modbus).
3.2.10 Home button
The home button allows to:
• Navigate to home.
• Restart the setup sequence during the start-up sequence.
• Reset Current Warning. That is to say, pushing the
home button, it can help you to leave Current Warning
notification window.
• Wake up the screen during sleep mode.
3.2.11 LED descriptions
For LED descriptions see “8.3.1 LED-lights” on page 73.
03

ABB ARC GUARD SYSTEM™ – CSU-2LV/2MV INSTALLATION AND MAINTENANCE GUIDE 17
03

ABB ARC GUARD SYSTEM™ – CSU-2LV/2MV INSTALLATION AND MAINTENANCE GUIDE 19
04
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4 Installation
20 4.1 Introduction
20 4.2 Installation procedure
20 4.2.1 Getting started
21 4.2.2 Mounting CSU-2
26 4.2.3 Configurations
27 4.3 Setting the system
27 4.3.1 Start-Up Sequence
28 4.3.2 Controlling

20 ABB ARC GUARD SYSTEM™ – CSU-2LV/2MV INSTALLATION AND MAINTENANCE GUIDE
4.1 Introduction
This chapter describes how to install the CSU-2 and set up
the system.
The installation of CSU-2 is performed in steps. After
finishing one step you proceed to the next one. The
sequence is mandatory.
4.2 Installation procedure
WARNING
The reader should have the knowledge and
follow the applicable safety laws and standards
as well as local safety instructions.
Installation procedure consists of the following five steps:
• Getting started
• Mounting
• Optical connections
• Electrical connections
• Configuration
Tools required
To mount the CSU-2 the following tools are required:
• Screwdriver, 2.5 x 0.6 mm (0.98 x 0.23 inch)
• Phillips screwdriver 4.3/2
• Drill 5 mm (0.196 inch), in case of wall mounting.
4.2.1 Getting started
This section describes instructions on how to receive and
check the CSU-2.
Do the following steps:
Receiving and checking
1. Turn the package with the correct side up.
2. Remove the transport casing.
3. Visually inspect the CSU-2.
4. Check that all items are included, according to the
delivery document.
List of contents
Check the contents in this package as follow:
• CSU-2
• Quick installation guide
• Safety Information
INFORMATION
This package is a basic starter kit. If you need
more according to your system needs then
contact your local supplier.
Intermediate storage
Until the CSU-2 is mounted it should be stored in its
original package.
04