Surge wave generators (SWG) are used with reflectometers for cable fault location. They generate surges that create arcs at faults, allowing transient waves to be recorded and fault distances to be determined. SWGs are available for voltages up to 3500kV and energies up to 3500J. They use switchable capacitors and surge stages to optimize energy for prelocation and pinpointing faults. A Digiphone receiver uses the difference in arrival time between electromagnetic and acoustic signals to precisely locate faults.
permite ahcer calculo para el dise{o de un tablero electrico,considerando los parametros necesarios para calcular los diveros elementos que integran en circuito d control.tales como calculo de la corriente nominal
permite ahcer calculo para el dise{o de un tablero electrico,considerando los parametros necesarios para calcular los diveros elementos que integran en circuito d control.tales como calculo de la corriente nominal
Thorne & Derrick UK are official distributors of the SebaKMT range of LV-HV Cable Fault Location instruments including cable sheath testers and cable sheath fault prelocation and pinpointing units. SebaKMT are the leading manufacturer of measurement equipment for the diagnosis of cable networks and for cable fault location. Cable faults are the ''natural enemy'' of reliability. The innovative SebaKMT products make it possible to quickly localise low and high voltage cable faults without causing damage to fault-free parts of the cable.
Thorne & Derrick UK are official distributors of the SebaKMT range of LV-HV Cable Fault Location instruments including cable sheath testers and cable sheath fault prelocation and pinpointing units. SebaKMT are the leading manufacturer of measurement equipment for the diagnosis of cable networks and for cable fault location. Cable faults are the ''natural enemy'' of reliability. The innovative SebaKMT products make it possible to quickly localise low and high voltage cable faults without causing damage to fault-free parts of the cable.
PROJECT DESCRIPTION
DOWNLOAD
The main objective of this project is to develop a device for wireless power transfer. The concept of wireless power transfer was realized by Nikolas tesla. Wireless power transfer can make a remarkable change in the field of the electrical engineering which eliminates the use conventional copper cables and current carrying wires.
Based on this concept, the project is developed to transfer power within a small range. This project can be used for charging batteries those are physically not possible to be connected electrically such as pace makers (An electronic device that works in place of a defective heart valve) implanted in the body that runs on a battery.
The patient is required to be operated every year to replace the battery. This project is designed to charge a rechargeable battery wirelessly for the purpose. Since charging of the battery is not possible to be demonstrated, we are providing a DC fan that runs through wireless power.
This project is built upon using an electronic circuit which converts AC 230V 50Hz to AC 12V, High frequency. The output is fed to a tuned coil forming as primary of an air core transformer. The secondary coil develops a voltage of HF 12volt.
Thus the transfer of power is done by the primary(transmitter) to the secondary that is separated with a considerable distance(say 3cm). Therefore the transfer could be seen as the primary transmits and the secondary receives the power to run load.
Moreover this technique can be used in number of applications, like to charge a mobile phone, iPod, laptop battery, propeller clock wirelessly. And also this kind of charging provides a far lower risk of electrical shock as it would be galvanically isolated.
PROJECT DESCRIPTION
DOWNLOAD
The main objective of this project is to develop a device for wireless power transfer. The concept of wireless power transfer was realized by Nikolas tesla. Wireless power transfer can make a remarkable change in the field of the electrical engineering which eliminates the use conventional copper cables and current carrying wires.
Based on this concept, the project is developed to transfer power within a small range. This project can be used for charging batteries those are physically not possible to be connected electrically such as pace makers (An electronic device that works in place of a defective heart valve) implanted in the body that runs on a battery.
The patient is required to be operated every year to replace the battery. This project is designed to charge a rechargeable battery wirelessly for the purpose. Since charging of the battery is not possible to be demonstrated, we are providing a DC fan that runs through wireless power.
This project is built upon using an electronic circuit which converts AC 230V 50Hz to AC 12V, High frequency. The output is fed to a tuned coil forming as primary of an air core transformer. The secondary coil develops a voltage of HF 12volt.
Thus the transfer of power is done by the primary(transmitter) to the secondary that is separated with a considerable distance(say 3cm). Therefore the transfer could be seen as the primary transmits and the secondary receives the power to run load.
Moreover this technique can be used in number of applications, like to charge a mobile phone, iPod, laptop battery, propeller clock wirelessly. And also this kind of charging provides a far lower risk of electrical shock as it would be galvanically isolated.
How to conduct the lightning impulse withstand test on 550kv GIS?Fang Sam
Abstract: With the rapid development of power grid in China, an increasing number of GIS are adopted in new substations. The lightning impulse test is recommended after the installation of GIS in order to check its insulation performance and reduce the risk of equipment failure. However, owing to the design and production, common lightning impulse generator with large capacitance load especially GIS cannot generate lightning impulse waveform, which meets the requirement. Therefore, based on lightning impulse withstand test of Three Gorges Right Bank 550kV GIS, models of lightning impulse generator and field equipment are established, and simulation calculation is done. According to the result, a method of installing the inductor in the impulse circuit is put forward to generate oscillating lightning impulse which meets the requirement of the test. This method is successfully applied in the test and results are good. Valuable experience has been accumulated for the lightning impulse test on GIS of 750kV, 1000kV substations in China. (http://www.himalayal.com/Impulse-Generator/HowtoConductLightningImpulseTestOnGIS.html)
A brief description about the components of the Distribution System. The components that are described below briefly are:-
1. Capacitor Voltage Transformer (CVT)
2. Current Transformer (CT)
3. Wave Trap
4. Isolators
5. Circuit Breakers
6. Surge arrester
7. Purpose of guard ring in suspension insulators
A simulator to reproduce fast rise-up noises which are generated when switching ON / OFF electric current on the inductive load.
It can be used for performance evaluation of electronic equipment upon reproduction of line noises which are intruded to the power supply lines or induced noises onto the telecommunication lines.
oise simulator can simulate high frequency noise generated ON/OFF at contact point of switch or relay, arc caused by electric motor. It can evaluate the resistibility of electric devices.
Pulse contains high frequency and by energy volume is changeable by adjusting pulse width. The high reproduction noise test of noise trouble in the market can be conducted.
To solve the trouble in the market high frequency, energy volume of test pulse can be adjustable
Similar to SEBA KMT Cable Fault Locators, Surge Generators (Thumpers) - SEBA KMT Cable Fault Location (20)
Isolation Procedures for Safe Working on Electrical Systems and Equipment by the JIB | solation Procedures for Safe Working on Electrical Systems and Equipment
This chart shows the safe isolation procedure that you should use when working on electrical systems and equipment.
You'll receive a printed copy of this from your Training Provider, but it's also here as a handy reference to keep electronically.
THE RULES OF SAFE ISOLATION ARE:
Obtain permission to start work (a Permit may be required in some situations)
Identify the source(s) of supply using an approved voltage indicator or test lamp
Prove that the approved voltage indicator or test lamp is functioning correctly
Isolate the supply(s)
Secure the isolation
Prove the system/equipment is DEAD using an approved voltage indicator or test lamp
Prove that the approved voltage indicator or test lamp is functioning correctly
Put up warning signs to tell other people that the electrical installation has been isolated
Once the system/equipment is proved DEAD, work can begin
Uploaded by THORNE & DERRICK LV HV Jointing, Earthing, Substation & Electrical Eqpt | Explosive Atmosphere Experts & ATEX IECEx.
THORNE & DERRICK based in the UK are international distributors of LV, MV & HV Cable Installation, Jointing, Substation & Electrical Equipment.
Since 1985, T&D have established an international reputation based on SERVICE | INTEGRITY | TRUST.
Contact us for 3M, ABB, Alroc, AN Wallis, CATU, Cembre, Centriforce, CMP, CSD, Elastimold, Ellis Patents, Emtelle, Euromold, Filoform , Furse, Lucy Electric & Zodion, Nexans, Pfisterer, Polypipe, Prysmian, Roxtec, Sicame, WT Henley.
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
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Today, after several years of existence, an extremely active community and an ultra-dynamic ecosystem, Kubernetes has established itself as the de facto standard in container orchestration. Thanks to a wide range of managed services, it has never been so easy to set up a ready-to-use Kubernetes cluster.
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In this talk, I'll show you step-by-step how to secure your Kubernetes cluster for greater peace of mind and reliability.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
Le nuove frontiere dell'AI nell'RPA con UiPath Autopilot™UiPathCommunity
In questo evento online gratuito, organizzato dalla Community Italiana di UiPath, potrai esplorare le nuove funzionalità di Autopilot, il tool che integra l'Intelligenza Artificiale nei processi di sviluppo e utilizzo delle Automazioni.
📕 Vedremo insieme alcuni esempi dell'utilizzo di Autopilot in diversi tool della Suite UiPath:
Autopilot per Studio Web
Autopilot per Studio
Autopilot per Apps
Clipboard AI
GenAI applicata alla Document Understanding
👨🏫👨💻 Speakers:
Stefano Negro, UiPath MVPx3, RPA Tech Lead @ BSP Consultant
Flavio Martinelli, UiPath MVP 2023, Technical Account Manager @UiPath
Andrei Tasca, RPA Solutions Team Lead @NTT Data
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
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A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
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Join us for an insightful dive into the world of FME parameters, a critical element in optimizing workflow efficiency. This webinar marks the beginning of our three-part “Essentials of Automation” series. This first webinar is designed to equip you with the knowledge and skills to utilize parameters effectively: enhancing the flexibility, maintainability, and user control of your FME projects.
Here’s what you’ll gain:
- Essentials of FME Parameters: Understand the pivotal role of parameters, including Reader/Writer, Transformer, User, and FME Flow categories. Discover how they are the key to unlocking automation and optimization within your workflows.
- Practical Applications in FME Form: Delve into key user parameter types including choice, connections, and file URLs. Allow users to control how a workflow runs, making your workflows more reusable. Learn to import values and deliver the best user experience for your workflows while enhancing accuracy.
- Optimization Strategies in FME Flow: Explore the creation and strategic deployment of parameters in FME Flow, including the use of deployment and geometry parameters, to maximize workflow efficiency.
- Pro Tips for Success: Gain insights on parameterizing connections and leveraging new features like Conditional Visibility for clarity and simplicity.
We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
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Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
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GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...
SEBA KMT Cable Fault Locators, Surge Generators (Thumpers) - SEBA KMT Cable Fault Location
1. Using the
surge wave generators
SWG
Benefits:
Surge generators for most voltages and output
up to 3500 J
Optimized surge energy for switchable capacitors
2. Using the
surge wave generators
Together with reflectometers, surge generators are the central
component for cable fault location. They are used for both prelocation and also pinpoint location.
Prelocation
Prelocation can be divided into transient methods and Arc
reflection prelocation, which differentiates between passive,
semi-active and active methods.
ICE – Impulse Current Method
(ICE-Method = Impulse Current Equipment)
This method is ideal particularly for fault location in long ground
cables and wet splices.
The surge wave generator ignites an arc at the fault. This
results in a transient, i.e. a spreading and repeatedly reflected
travelling wave between the fault and the surge wave generator. An inductive coupler records this transient wave with a
reflectometer, the Teleflex. The length of one full oscillation
wave corresponds to the direct distance to the fault.
ARM – Arc Reflection Method
(HV-supported reflection method)
All reflection prelocation methods offer the advantage of a very
detailed measurement result corresponding in principle to the
picture of a normal reflection measurement. So these are the
preferred fault location methods. Differences arise with the
different technologies, which can have a relatively simple
structure resulting in weight advantages. More complex technologies are more efficient, but also have to be integrated in a
measuring system.
The simplest method is the passive ARM method (used to be
called arc stabilization or short-term arc method). This extends
the discharge of the surge generator and with it the burning
duration of the arc by means of a series resistor in the
discharge path.
In the semi-active ARM method, the discharge is extended
by an inductivity. Use of inductivity means that the level of
voltage is not affected, making it much easier to locate faults
also with a high ignition voltage.
A coupler for recording the transient current wave is fitted as a
standard feature in all surge wave generators with a surge
energy of 1000 J or more.
With the LSG 3-E, SebaKMT offers an active ARM method
with an integrated 2 kV surge unit for excellent extension and
stabilization of the arc. At the same time, this device permits
an independent use as a 2 kV prelocation and surge unit.
Teleflex picture of the ARM method
Teleflex picture of the ICE method (current decoupling)
3. SWG
Pinpoint location
Energy
1000 J
For a precise location of the fault it is essential to confirm its
position along the cable, because pre-location with the Teleflex
only visualizes the absolute distance. But the position and path
of the cable in the ground, and thus the actual position of the
fault, is only relatively inaccurately known. An absolutely precise pinpointing is necessary to limit expensive excavation
work and resulting surface damage to an absolute minimum.
Here, a direct discharge of the surge generator produces an
arc at the fault position. The direct connection means that this
discharge takes place very quickly, generating a loud flashover
sound which can be located without any problems using a
corresponding acoustic receiver at the surface, such as the
Digiphone.
It is important to always use the maximum available surge
energy, given the proportional behaviour of volume and
discharge energy. All SebaKMT SWG surge wave generators
have switchable surge stages.
The basic equation of the surge energy is: W = 0.5 x C x U²
Modell
SWG 505
Range Voltage kV
n
Energy
Joule
Cap.
µF
Fully
variable
surge voltage
250 J
62 J
0
8 kV
16 kV
32 kV Surge level
Best possible setting
Example with a required surge voltage of 8 kV: The full 1000
Joule surge energy is obtained with 100% surge voltage in the
8kV surge range. A setting of 25% surge voltage in the 32 kV
surge range ( kV) would be useless, producing only 62 Joule
surge energy.
Therefore it is always recommended as follows: First select the
optimum range, i.e. the lowest necessary voltage level, and
then adjust the SWG to the maximum possible voltage. This is
the only way to guarantee the maximum energy and sound at
the arc. If only half the voltage range is used, then only one
quarter of the surge energy is available.
Voltage
Cycle
adjustable Single imp
Imax
mA
Dimension
W x D x H
Weight
kg
I
II
III
3
4
5
180
320
500
40
no
1.5 … 6
yes
129
172
213
520 x 255 x 530
43
I
II
0 … 2.5/5/10
0 … 4/8/16
195
500
62.5
15.6
3.9
yes
1.5 … 6
yes
185
300
520 x 280 x 530
47
I
II
III
0…2
0…4
0…8
1000
1000
1000
500
125
31.5
yes
2…6
yes
1400
700
500
520 x 270 x 670
70
I
II
III
0…8
0 … 16
0 … 32
1000
1000
1000
31.2
7.8
2
yes
2.5 … 10
yes
210
105
53
520 x 430 x 630
106
SWG 1750 C
SWG 1750 CI *
I
II
III
0…8
0 … 16
0 … 32
1750
1750
1750
54.4
13.6
3.4
yes
2.5 … 10
yes
210
105
53
520 x 430 x 630
97
SWG 1750 C-4
two-part
I
II
I
II
III
0…2
0…4
0…8
0 … 16
0 … 32
1150
1150
1750
1750
1750
566
142
54.4
13.6
3.4
2.5 … 10
yes
520 x 430 x 630
yes
3650
1850
210
105
53
104
+
69
I
II
III
0…8
0 … 16
0 … 32
3500
3500
3500
109
27.2
6.8
yes
2.5 … 10
yes
210
105
53
SWG 500
SWG 8-1000
SWG 1000 C-1
SWG 1750 CD
two-part
3500 Joule
* including leakage current measurement
520 x 430 x 460
520 x 430 x 630
520 x 270 x 410
99
+
30
4. We are happy to provide
you with information!
Digiphone – receiver for combined acoustic and
electromagnetic pinpoint location
The Digiphone works according to the principle of the coincidence or difference method. It automatically measures the time
differencebetween the electromagnetic signal of the surge
voltage and the acoustic bang of the arc flashover.
The Digiphone operates like a stopwatch. The electromagnetic
pulse starts a counter and the much slower propagating
sound stops the counter afterward. The displayed time, or the
time difference between the sound and the magnetic pulse,
corresponds to the distance to the fault. The shorter the time,
the closer you are to the fault. The display shows the difference
in time as a numerical value, while a bar graph shows the
electromagnetic field strength. The field strength display also
acts as a locating facility of the cable position. The bar graph
display is broken down into individual segments to permit a
very accurate definition of where the cable is running. As long
as you keep your bearings on this maximum, your longitudinal
axis is already exactly on top of the cable. As a result, the
position over the cable is so precise that you almost cannot
miss the fault, even when faults are very difficult to hear.
SWG and Digiphone
This location principle also works for secondary noises and is
particularly useful in situations where cables are installed in
protective ducts or under solid road surfaces (concrete,
asphalt, etc.).
Fault location with SWG and Digiphone
For more information, see:
SebaKMT
Dr.-Herbert-Iann-Str. 6
11KV 33KV CABLE JOINTS & CABLE TERMINATIONS
FURSE EARTHING
96148 Baunach/Germany
www.cablejoints.co.uk
Tel. +49 (0)
Thorne and Derrick UK 95 44 - 6 80
Tel 0044 191 490 1547 Fax 0044 191 477 - 22 73
Fax +49 (0) 95 44 5371
Tel 0044 117 977 4647 Fax 0044 117 9775582
24 hotline +49 (0) 18 05 - 73 22 568
Our range of products: Equipment and systems to locate faults in power and
communications networks, as well as for leak location on pipe networks · line
location equipment · seminars · service · contracting.
We reserve the right to make technical changes.
ISO 9 0 01: 20 0 0
sales@sebakmt.com
www.sebakmt.com
sebaKMT is a registered trademark of the sebaKMT group
LFT_SWG_eng_2007_26
www.sebakmt.com
CABLE JOINTS, CABLE TERMINATIONS, CABLE GLANDS, CABLE CLEATS
FEEDER PILLARS, FUSE LINKS, ARC FLASH, CABLE ROLLERS, CUT-OUTS