The SIPROTEC 4 7SJ61 relays can be used for line protection of high and medium voltage networks with earthed (grounded), low-resistance earthed, isolated or compensated neutral point. When protecting motors, the SIPROTEC 4 7SJ61 is suitable for asynchronous machines of all sizes. The relay performs all functions of backup protection supplementary to transformer differential protection.
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The relay provides control of the circuit breaker, further switching devices and automation functions. The integrated programmable logic (CFC) allows the user to implement their own functions, e. For the automation of switch gear (interlocking). The user is also allowed to generate user-defined messages. The flexible communication interfaces are open for modern communication architectures with control systems.
The information provided here is restricted to general notes regarding the procedures. Specific instructions for the individual devices are provided in the device manuals.
Commissioning of protection relays Pre-testing of the instrument transformers and their connections must be carried out in the same manner as with conventional protection. The measuring functions of the protection devices may already be utilised for this purpose. The binary device outputs can be activated individually by means of the. This largely simplifies the pre-testing of the signalling and tripping circuits, as the internal protection functions do not have to be activated for this purpose. The testing of serial interfaces which are new to the numerical devices can also be carried out in this manner. Protection relay test equipment (photo credit: megger.com). Settings are usually applied with the setting program in the office of the protection department, off-line (without protection device) and saved onto a mass storage.
In the substation the settings must then only be transferred by PC (Laptop) from the mass storage to the protection device. Current injection testing (photo credit: petoservices.com) To test the protection function with injected signals (current and voltage) PC controlled electronic test equipment is available nowadays which provides almost fully automated test sequences. A three-phase test equipment is recommended as the modern devices monitor symmetry of the three-phase system which may pick up when single-phase tests are carried out. Primary injection testing is only seldom applied due to cost constraints. With the, testing is somewhat more complicated as the currents must be injected at geographically separated locations. In the past, single ended injection was therefore applied for pre-testing by phase synchronous connection of the secondary injection equipment to voltage transformers of an unused feeder in both substations.
The test sequence was then simultaneously initiated at both ends when the feeder was energised. With the electronic test equipment this difficulty no longer exists as the test equipment at both line ends can be synchronised via GPS signals. For the commissioning of generating units, a so-called short-circuit cycle is carried out. For this purpose, the generator is started with a deliberate short-circuit while the system CB is open. The excitation of the generator is then increased. The generator current increases but may not exceed nominal current.
In this way stability and tripping of the differential protection can be checked as close to reality as possible. A similar test with short circuit cycle could also be done on a transformer feeder and busbar protection, if a system connection to an available generator can be established. Generally, testing can however only be done with load current. To get a definite indication of the current values and therefore the connection and polarity of the CT circuits, a test current of at least 10% of the nominal device current should be obtained by means of appropriate system switching. To measure the feeder currents as well as the operating/restraint currents, a large number of measuring instruments had to be connected with conventional protection (12 for a transformer differential protection). With the numerical protection the measured values are indicated by the device itself and provided in a summary on the PC monitor via the applied software. Wiring errors (e.g.
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Swapped phase connections) are thereby very quickly identified. When load current is flowing through the system, the operating current (tripping current) should apart from charging currents, be negligibly small and the restraint current should correspond to the sum total of all feeder currents. By reversing the polarity of one current measuring input by means of the corresponding setting parameter, an internal fault can be simulated. Restraint and operating current should in this case have approximately the same magnitude. An oscillographic record can also be initiated via DIGSI and can then be viewed using to calculate the phasors of the current for graphic representation. In this manner, an error in the current comparison can immediately be detected.
SIPROTEC 4 devices provide for a web monitor (web browser). Thereby the phasor diagrams can be called up and visualised online using a common internet browser tool. See Figure 1 below.
Figure 1 – Feeder differential protection 7SD52: Representation of the current phasors on a PC with the web monitor (web browser). The new SIPROTEC 5 line relays 7SD8 and 7SL8 now allow also DIGSI to communicate not only with the local relay but also with the relay at the remote line end(s) through the communication link of the differential protection. Following the function tests, the final settings should be applied and tripping of the CB must be tested by simulation of an internal fault.
The final settings of the protection for documentation and archiving are extracted locally or from remote via PC. DIGSI 5 Tutorial DIGSI 5 is the SIEMENS engineering tool for parameterization, commissioning and operating all SIPROTEC 5 protection relays. The full capabilities of DIGSI 5 are revealed when you connect it to a network of protection devices. Then you can work with all of the devices in a substation in one project. Part 1 of 11: Introduction Part 2 of 11: Creation of a project, adding a device Part 3 of 11: Device information Part 4 of 11: Communication and hardware modification Part 5 of 11: Routing of information in the matrix Part 6 of 11: Device settings Part 7 of 11: Display editor Part 8 of 11: The logic editor Part 9 of 11: Creating of a OHL (over headline feeder) Part 10 of 11: Adding the transformer infeed configuration Part 11 of 11: Adding of a transformer feeder Maintenance of protection relays The self-monitoring contained in the numerical devices covers 80-90% of the protection equipment. CT circuits are included as long as load current is flowing and the signal communication is also continuously monitored to detect errors. The numerical protection therefore only has to be maintained with fairly long maintenance cycles.
Siemens Protection Relays
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Device manuals Hardware manual Operating manual SIPROTEC 5/DIGSI 5 Tutorial Selection Guide for SIPROTEC and Reyrolle Communication protocol manuals Product information Engineering Guide Online help DIGSI 5 Online help devices Overview of documentation for the SIPROTEC 5 system Product information The catalog describes the system features and the devices of SIPROTEC 5. The product information includes general information about device installation, technical data, limit values for input and output modules, and conditions when preparing for operation. This document is provided with each SIPROTEC.
Editorial SIPROTEC has been a recognized brand leader in digital protection and field devices on the energy market for decades. The Siemens high-performance SIPROTEC devices cover the entire power spectrum and can be implemented in a wide range of fields – from power generation to very high voltage transmission and distribution network applications. “Smart automation for transmission grids” is the Siemens response to the present and future challenges to achieve a reliable and efficient energy supply. SIPROTEC 5 is an active component of the energy-efficient smart grid and an important building. The SIPROTEC 5 System Solutions for today‘s and future power supply systems – for more than 100 years SIPROTEC has established itself on the energy market for decades as a powerful and complete system family of numerical protection relays and bay controllers from Siemens. SIPROTEC protection relays from Siemens can be consistently used throughout all applications in medium and high voltage. With SIPROTEC, operators have their systems firmly and safely under control, and have the basis to implement cost-efficient solutions for all duties in modern, intelligent and “smart” grids.
Users can combine. SIPROTEC 5 – the new benchmark for protection, automation and monitoring of transmission grids The SIPROTEC 5 series is based on the long field experience of the SIPROTEC device series, and has been especially designed for the new requirements of modern systems. For this purpose, SIPROTEC 5 is equipped with extensive functionalities and device types. With the holistic and consistent engineering tool DIGSI 5, a solution has also been provided for the increasingly complex processes, from the design via the engineering phase up to the test and operation phase.
LSP3.01-0013.eps Thanks to the high. Innovation Highlights Holistic workflow The tools for end-to-end engineering from system design to operation will make your work easier throughout the entire process.
The highlight of SIPROTEC 5 is the greater-than-ever emphasis on daily ease of operation. SIPROTEC 5 provides support along all the steps in the engineering workflow, allowing for system view management and configuration down to the details of individual devices, saving time and cost without compromising quality (Fig.
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Holistic workflow in SIPROTEC 5 means:. Integrated, consistent system and device engineering – from the. Perfectly tailored fit with SIPROTEC 5 means: Designed to communicate with SIPROTEC 5 means:.
Modular system design in hardware, software and communication ensures the perfect fit for your needs Adaptation to the topology of your communication structure. using settings (ring, star, network, ). Functional integration of a wide range of applications, such as protection, control, measurement, power quality or fault recording. Scalable redundancy in hardware and software (protocols) to match your requirements. The same expansion and communication modules for all devices in the family.
Abb Protection Relays
What weight oil for 1998 b2500 mazda. Innovation Highlights Siemens, the pioneer of IEC 61850 makes the full potential of this global standard simply usable for you. The IEC 61850 standard is more than just a substation automa- tion protocol.
It comprehensively defines data types, functions and communication in station networks. In Edition 2, the influence of the standard is extended to more sectors and applications of the energy supply industry. Siemens was actively involved in the process of standardization from Edition 1 to Edition 2, and with the largest number of completed installations in the world, our experience as a manufacturer. Functional Integration Perfectly tailored fit Due to the modular construction of their hardware and s oftware, and their functional integration, SIPROTEC 5 d evices are well suited for all tasks in the electricity transmission and distribution grid. The SIPROTEC 5 devices can be used for the following applications:. Protection. Monitoring. Data acquisition and recording. Communication and Cyber Security Functional integration Due to the modular design of its hardware and software and the powerful engineering tool DIGSI 5, SIPROTEC 5 is ideally suited m for protection, automation, measurement. All SIEMENS Energy Management catalogues and technical brochures.
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