Manual Excount
Manual Excount
Manual Excount
User’s manual
Legal disclaimer
Any responsibility or liability for loss or damage in connection with the use of
this product and the accompanying documentation is disclaimed. The infor-
mation in this document is furnished for informational use only, is subject to
change without notice, may contain errors or inaccuracies, and represents no
commitment whatsoever.
Declaration of Conformity
Hereby, ABB Power Technologies, declares that this EXCOUNT-II
system is in compliance with the essential requirements and
other relevant provisions of Directive 1999/5/EC.
WARNING!
Changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to operate
the equipment.
NOTE! This equipment has been tested and found to comply with the limits for
a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference when
the equipment is so operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instruction manual, may cause harmful inter-
ference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the user will be requi-
red to correct the interference at his own expense.
Trademark acknowledgements
Windows 95, 98, ME, NT4, 2000 and XP are registred trademarks of
Microsoft Corporation.
Safety instructions
Do not connect the Transceiver to other voltage sources
than a standard 9 volt battery type 6LR61/PP3
Ensure that the battery is connected correctly.
The Transceiver contains a radio transmitter and receiver
which must not be used where the use of radio transmit-
ters or other electronic devices is prohibited.
WARNING!
All work related to the fitting, mounting, assembly or
handling of EXCOUNT-II sensors and the surge arresters
shall be made with disconnected and earthed conduc-
tors. Follow all regulations and rules stated by internatio-
nal or national safety regulations.
Section 1
1HSA 801 080-15en EXCOUNT-II Users Manual 7
1. Introduction
Procedure Section
Read the safety instructions carefully 1
What to do before installation 2
Special attention is drawn to Section 2.4 which
should be followed to ensure trouble-free operation.
How to install the sensors 3
Guide to using the transceiver 4
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Figure 1.2.1
The principle of measuring with EXCOUNT-II
The sensor is mounted on the surge arrester in series with the earth
conductor. It is important that the surge arrester is insulated from the
ground with an insulating base. The sensor registers the number
of discharges, categorizes and records the amplitudes of the surges
together with their date and time and measures the leakage current.
As an option, resistive leakage current can also be measured.
Section 2
1HSA 801 080-15en EXCOUNT-II Users Manual 11
2. Before installation
Verify that the following items are present together with this manual:
• Transceiver
• Data cable
• CD with software
• 9V battery
• Philips screwdriver
If the contents are to be stored for a long period of time prior to use,
they should be kept dry and indoors.
2.4 Pre-installation
Prior to installation of the EXCOUNT-II sensor onto the surge arrester, the fol-
lowing steps should be undertaken to ensure trouble-free operation.
a) Sensors ID-number
Make a note of the sensor ID-number and its intended location (sta-
tion, position and phase) before installation. The ID-number is located
as shown in figure 2.4.1 and unique for each individual sensor. The
When energy in the sensor falls below a certain level, the sensor swit-
ches off the listening function (to conserve energy for recording) until
such time that the energy level is sufficient again for communication.
This may occur if many attempts to communicate have been made in
a row or because there is insufficient sunlight and/or electrical field.
NOTE! A long-life battery is pre-installed from the factory for user con-
venience to minimize difficulties in communication due to insufficient
energy. Regardless, it is highly recommended that the internal high-
efficiency capacitor is fully charged before first-time use by following
the steps in section 2.4 b.
To replace the battery, open the battery cover using the supplied phi-
lips screwdriver to loosen the two screws, see figure 2.5.1. Insert the
battery, ensuring correct polarity, and then replace the battery cover.
Battery
Figure 2.5.1
Back view of the sensor with battery cover
2.6.1 Installation
Insert the CD into your computer.
Press the START button in lower left corner
Select SETTINGS then CONTROL PANEL
Double-click on the icon ADD/REMOVE PROGRAMS
Select ADD NEW PROGRAMS
Follow the instructions on the screen
2.6.2 Uninstallation
Press the START button in lower left corner
Select SETTINGS then CONTROL PANEL
Double-click on the icon ADD/REMOVE PROGRAMS
Browse to the EXCOUNT-II software and click REMOVE
Follow the instructions on the screen.
1. Connect the transceiver to the PC via the data cable. The PC will
automatically detect a new USB device.
Figure 2.6.1
Figure 2.6.2
4. The system will discover that the drivers has not passed the Win-
dows logo testing. This is only a warning arising from the unique
nature of EXCOUNT-II and does not affect the driver or system
performance. The device is USB compliant and the drivers are
Windows compliant. Click Continue Anyway.
Figure 2.6.3
5. The system will find the setup files and follow the instruction of the
setup file to copy drivers. Confirm the device drivers found and
driver installation complete. Click Finish to close the wizard.
Figure 2.6.4
All current generation ABB and earlier ASEA gapless ZnO surge
arrester types are included in the arrester data.
For other types of gapless surge arresters, simply select the appro-
priate IEC class from the dropdown list, see figure 2.7.2.
2. Connect the transceiver to the PC via the data cable. See also sec-
tion 2.6.4 for installation of USB drivers if this is the first time use
of the transceiver. Download the sensor’s ID from the EXCOUNT-II
software into the Transceiver as described in the EXCOUNT-II help
system for Transfer data, see figure 2.7.3.
Section 3
1HSA 801 080-15en EXCOUNT-II Users Manual 23
3. Sensor installation
Safety information
Serious material damage, severe personal injury and/or death can be the result
of not following this instruction. Therefore, the personnel responsible for the
installation of the equipment shall read and follow this instruction carefully.
Handling and maintenance of all the sensors described in this instruction must
be done by personnel trained for this type of work.
WARNING!
All work related to the installation of EXCOUNT-II sensors and the surge
arresters shall be made with de-energized and earthed conductors. Follow all
regulations and rules stated by international or national safety regulations.
Normally, the EXCOUNT-II sensors and the surge arresters operate at a high
voltage. Therefore the sensor must be installed in such a way that only qualified
personnel has access to it.
Figure 3.4.2
Top view
Screws, nuts, sockets, washers and conductors are not supplied by ABB
unless specified.
Mount EXCOUNT-II (3) on surge arrester´s bottom flange (4) above insula-
ting base (5) according to figure 3.3.1. Do not place close to venting duct
(if any). Bolt joint (1) and (2) is supplied with ABB insulating base (5).
Fitting and tightening torque according to instructions supplied with
insulating base.
Figure 3.5.2
Back view
Connect to earth
terminal on surge
arrester flange
Planar surface
Min 60 mm
to ground
plane
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Earth cable
Figure 3.7.1
Section 4
1HSA 801 080-15en EXCOUNT-II Users Manual 31
4. Using the transceiver
Important information
Environment
To achieve the best possible lifetime out of your EXCOUNT-II trans-
ceiver, avoid exposure to strong sunlight for extended periods, hot
temperatures (over +50 º C), cold temperatures (under -10 º C ) and
water (the design is showerproof but not watertight).
Cleaning
To clean the transceiver use only a damp soft cloth with a mild detergent.
NOTE! Used batteries should NOT simply be thrown away. Return the
battery to a recovery station or leave it with your local ABB representative
for environmentally friendly disposal.
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Figure 4.1.1
c) Turn on the transceiver and enable the external antenna from the
settings menu as described in section 5.4.2.
Operation performed
Stand by
successfully
ABB
Operation performed
>>>>>>> Establishing contact
un-successfully
Leakage current
Settings
measurement
Resistive leakage
Date & clock
current measurement *
Press to turn
on the transceiver
Check that the date and time Ensure the sensor to be read Check that the date and time
on the transceiver are is within range and orientation for on the transceiver are
synchronized with the settings transmission, see section synchronized with the settings
on the PC. See 4.4 4.5 to 4.10 on the PC. See 4.4
Set the transceiver to Set the transceiver to "Make Set the transceiver to
"Prepare the transceiver measurements" mode. "Data transfer from Transceiver
for measurements" mode. to PC" mode.
Op n
tim tio
al d irec
irec al d
tio tim
n Op
270° 90°
180°
Figure 4.7.1
Optimal direction of the transceiver internal antenna
Sensor
n
ectio
al dir
Optim
Height
2 x Height
Figure 4.8.1
Optimal direction of the sensor antenna
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Figure 4.9.1
Use of hand-held external antenna in special configurations
Figure 4.9.2
Example of vertical tower arrangement (double circuit)
Readings must be made more often and with short regular time intervals
if the intention is to correlate the EXCOUNT-II data with other external
measurements and recordings - lightning activity meters, SCADA, etc.
Section 5
1HSA 801 080-15en EXCOUNT-II Users Manual 43
5. Transceiver menus
Stand by
Turn the transceiver on by pressing
Turn the transceiver off by pressing
Got to the main menu by pressing
5. Main menu
Select alternative with the key.
Then press
Back to stand-by
5.4.1 Backlight
By default backlight is disabled.
Section 6
1HSA 801 080-15en EXCOUNT-II Users Manual 51
6. Surge arrester monitoring theory
6.1 Introduction
The rising demands for improved reliability of power supply and
reduced maintenance costs have increased the attention on condi-
tion monitoring of equipment in HV substations. As far as metal-oxide
surge arresters are concerned, there are two important aspects which
are related to the reliability of the arresters:
• The stress on the arrester in terms of the intensity
and frequency of impulse currents
• The condition of the arrester in terms of its insulating
properties in normal service
In the following, the bases for surge counting and leakage current
measurements are described, and the corresponding functions of the
EXCOUNT-II are presented. For general information on various diag-
nostic methods for metal-oxide arresters, please refer to IEC 60099-5.
The measured current peak values are sorted into five impulse current
ranges and stored in the EXCOUNT-II memory along with the date and
time of each impulse. The impulse current ranges are: 10 - 99 A, 100
- 999A, 1000 - 4999 A, 5000 - 9999 A and >10000 A. The preci-
sion of the impulse current measurements is optimized with regard
to lightning current impulses. The EXCOUNT-II memory keeps the
information on the 1000 most recent impulses, with a maximum rate
of 2 impulses per second. For technical data on surge counting, see
technical data in section 8 on page 52.
Impulse current
transformer
Figure 6.2.1
Internal parts of the EXCOUNT-II sensor
Figure 6.3.1
Electrical representation of metal-oxide surge
arrester in the leakage current region
Figure 6.3.2
Example of voltage-current characteristics
of a metal-oxide surge arrester
Figure 6.3.3
Total leakage currents of metal-oxide
surge arresters in different service conditions
The principle for measurement of the resistive leakage current with the
EXCOUNT-II is the same as for the original leakage current monitor,
LCM, developed by ABB Switchgear and TransiNor, and described in
detail in [2].
The procedure for total leakage current and field probe current
measurements with EXCOUNT-II is presented step-by-step in the fol-
lowing:
Zero-flux current
transformer Field probe
Figure 6.3.4
Internal parts of the EXCOUNT-II sensor
Electric field
surrounding the
arrester
Field
probe
Ip
Figure 6.3.5
Principle of field probe for determination
of system voltage harmonics
The ratio of the total resistive leakage current to the third harmonic
current depends on the operating voltage stress (the operating voltage
divided by the rated voltage) and the arrester temperature (in practice,
the ambient temperature). These parameters are therefore recorded
at the time of the total leakage current and field probe current measu-
rements. The ambient temperature is automatically measured by the
sensor, while the operating voltage is entered into the transceiver at the
time of the total leakage current and field probe measurement.
Figure 6.3.6
• Multipliers for the total resistive leakage current and the resistive
third harmonic as functions of voltage stress and ambient tempera-
ture. These multipliers are used for converting the actual values of
voltage stress and ambient temperature at the time of measurement
to standard operating conditions. Examples of such multipliers are
given in Figures 6.3.7 and 6.3.8.
Figure 6.3.7
Typical information for conversion to
standard operating voltage conditions
Figure 6.3.8
Typical information for conversion to
standard ambient temperature conditions
References
[1] IEC 60099-5 Ed. 1.1 (2000-03): Surge arresters - Part 5: Selection
and application recommendations.
Section 7
1HSA 801 080-15en EXCOUNT-II Users Manual 63
7. Radio transmission protocol
Figure 7.1.1 shows one of the packet formats used in EXCOUNT-II. The
structure begins with a training preamble, which improves weak signal
detection at the receiver by ”training” the data slicer for best noise immu-
nity, and providing signal transitions to train the clock recovery process.
The training preamble usually consists of several bytes of a
1-0-1-0-1-0 ... sequence.
EXCOUNT-II RF Link Packet Format
Start From Packet Size/Status FCS High FCS Low
Preamble To Byte Message
Symbol Byte Number Byte* Byte Byte
Figure 7.1.1
The message then follows . The following two bytes of the packet com-
prise a 16 bit error checking code (frame check sequence), based on the
X.25 packet standard (ISO 3309). The error checking code is recompu-
ted at the destination to confirm error-free detection. The ISO 3309 frame
check sequence provides very high confidence of error detection for
packets up to 256 bytes in length.
Technical data
Section 8
1HSA 801 080-15en EXCOUNT-II Users Manual 65
8. Technical data
General
Sensor Transceiver External antenna
Climatic Sealed, water-tight design, IP67
Weather-proof, IP 54 Weather proof, IP54
conditions (Battery compartment, IP 65)
Ambient
–50 °C to +60 °C
temperature -10 °C to +50 °C -10 °C to +50 °C
Operation: –40 °C to +60 °C
range
Measuring
50 or 60 Hz
frequency N/A N/A
(software selectable)
range
Short-circuit
65 kA acc. to IEC 60099-4 N/A N/A
capability
Built-in solar cell and field probe 9 Volt battery
Primary power
Back-up 9 Volt lithium battery Alkaline type N/A
supply
U9VL (primary for indoor use) 6LR61/PP3
Battery replace- 8 years with 1200 mAh
> 4 hours N/A
ment period lithium battery
Weight (without
2072 g 221 g 420 g
battery)
System clock
The time-stamp for surge counting is only as accurate as the value stored in the sensor.
This value is “reset” each time contact is made with the transceiver, but in between mea-
surements can drift because of temperature dependence, as depicted in Figure 8.1.1.
Figure 8.1.1
Temperature dependent time deviation
8.2 Dimensions
EXCOUNT-II
ID. No: XXXXXXXX
Cat. No:
1HSA44X XXX-X
Made in Sweden
Figure 8.2.1
Sensor
Section 9
1HSA 801 080-15en EXCOUNT-II Users Manual 69
9. Disposal
Disposal
When the items incorporating EXCOUNT-II are taken out of service,
components shall be disposed of according to local regulations.
Section 10
1HSA 801 080-15en EXCOUNT-II Users Manual 71
10. Transceiver error codes
Index
Section 11
1HSA 801 080-15en EXCOUNT-II Users Manual 77
11. Index
A M
Administration 20 Making measurements 36
arrester data 20 Measuring principle 9
sensor data 20 Measurement strategy 42
station data 20
transceiver date/time 21 P
windows date/time 21 Packet communication protocol 64
Antenna 34, 38, 39 PC 9
B Pre-installation 12
Battery 12, 14 R
battery check 45 Radio transmission protocol 64
C Range of the communication 38
Reference measurement 25
Cleaning 32 Resistive leakage current 47, 55, 58
D S
Data cable 9 Safety instructions 3
Data transfer 44 Sensor 9
Dimensions 68 antenna 39
Disposal 70 field probe 58
ID-number 20
I Installation 25
Set clock and date 37
ID number 13 Software 15
Insulating base 9 Special configurations 40
Surge arrester monitoring 52
K leakage current measurements 54
Key to the symbols 3 resistive leakage current 55
surge counting 52
L Surge counter data 46
Leakage current 46, 47, 54, 58 Sychronization of the clocks 37
measurement
T
Technical data 66, 67
Total reading 48
Transceiver 9
antenna 34, 38
battery check 45
cleaning 32
data transfer 44
date/time 50
error codes 72, 73, 74, 75
functions 33
measurement 46
menus 44
range of the communication 38
sychronization of the clocks 37
symbols 35