1.02 Description = Distance + Over Voltage Prot. siemens. '�Pkp����A�c� ���Ϧ���c�����S��y�V�EE�Yr酛��� ���#%�r-g�5��>-�k2�E��;3�9>���̀�=�t��r�������F�m�� l f j�Ha��Q �b� ���``6S�`R$�lV���� pd`}�H��8�"?1�ae�e��ƨ[��q�\&E�y��lLl�a�l@�1�.�D�{� �D:@ڟ���8 i.e. 2.03 Conductor used = ACSR Kundah. Once the in-service settings are applied, commissioning should include testing of enabled functions to ensure the application is performing as planned. Line Differential. 271 0 obj <>stream A Technical Reference Document Power Plant and Transmission System Protection Coordination Draft 6.9 – November 19, 2009 NERC System Protection and Control Subcommittee CTR = 800 /1. CALCULATIONS: {½ * Primary Arc Resistance * CT / PT Ratio} Tower Footing Resistance ( Secondary ) for Phase to Ground Fault Zone – 2 = 100% of Protected Line + 20% of Adjacent Shortest Line •RF=RARC + RTOWER FOOTING The relay measures the sum between line impedance (if fault at 100% of the line) and the fault resistance 11. ��� ��%���A���3Ea�-����t4Κ�:am⡕KOgs����^0E�? Irest= 0.3 x 0.5 = 0.15A (see point P on the restraint characteristic). ABB RED670 Fault Locator Calculations. Understanding Distance Protection & distance protection relay Why Distance Protection > Since the impedance of a transmission line is proportional to its length, for distance measurement it is appropriate to use a relay capable of measuring the impedance of a line up to a predetermined point (the reach point). 2 : Model setting calculations -Line 1-149 3 : Model setting calculations-Transformer 1-132 4 : Model setting calculations- Shunt Reactor 1-120 5 : Model setting calculations- Busbar 1-15 6 : Relay setting guide lines for transmission lines 1-19 7 : Recommendations for protection system management 1-5 endstream endobj startxref )��,��(Bq,:c�$���'p�V?���O�뫥��������.��$��G1�2`�F�7N͕��lUB�q���@%�f|��U�wU�e��z3ާ�U���2�d'I�ȅ����3U�ҷU�������-{�NeS�UҮ�49��|�{ҩ��� Electrical Protection & Control. Types of Distance or Impedance Relay. 10% of 3 sec. Positive Sequence Resistance 100% of Line = {Line Length* Positive The documents presented should serve as a model to various utilities in preparing similar documents for setting protection relays installed installed at 220kV, 400kV and 765kV EHV and UHV transmission systems. REF relay setting calculation REF RELAY SETTING CALCULATION. We are accustomed to providing calculation and relay setting documentation in meticulous detail. 71 (R1=R2) 0.0791 /KM (X1=X2) 0.403 �,�H`�g��J�%%�.�ڡzVlE��g� Distance Relay Setting calculation - Free download as Excel Spreadsheet (.xls / .xlsx), PDF File (.pdf), Text File (.txt) or read online for free. Alexander General Electric Co Malvern, PA INTRODUCTION Distance functions have been in use for many years and have progressed from the original electro-mechanical types thr ough analog types and now up … ETAP StarZ Transmission Line Protection software provides tools to examine and check the performance of distance relay settings, user logic, and communication interfaces. Calculate Actual Operating time according to Various IES Curve. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Reactance per Unit Length= {Positive Sequence Reactance / Line 7. 220. The relay will now use 30% of this ITOTto derive its actual restraint current, i.e. Electrical tools (MS Excel Spreadsheets) This section is dedicated to tools every electrical engineer can use in daily work.These spreadsheets below will make your job much more easier, alowing you to shorten the time used for endless calculations of cables, voltage drop, various selections of circuit breakers, capacitors, cable size and so on. u�B]��PK�%�h �d�b}�yfO=�D�Ϟx��ӛ�7Oo�3�"�2�"�2�"�2�"�1�!�ѧ��ѧ��ѧ��ѧ��ѧ��ѧ��ѧ��ѧ�� Positive Sequence Reactance = {Line Length * Positive Sequence There are mainly two types of distance relay– Definite distance relay. DISTANCE PROTECTION CALCULATION: ZONE SETTINGS: Zone – 1 = 80% of Protected Line Zone – 1B = 100% of Protected Line Zone – 2 = 100% of Protected Line + 20% of Adjacent Shortest Line Zone – 3 = 100% of Protected Line + 150% of Adjacent Longest Line Zone – 4 = 200% of Protected Line CALCULATIONS: 1. Distance Relay Coordination and Protection Analysis Software. 3. ABB RET670 Calculations. sample relay setting calculation. Now if IDIFF> 0.15A relay operation results. As the time setting multiplier is 0.1 here, actually the moving parts of the relay have to travel only 0.1 × 100% or 10% of the total travel distance, to close the relay contacts. The following values should be used: X1SA = 0.001 W, R1SA = 0.001 W, X1SB = 1500 W, R1SB = 1500 W, Xm0 = 0W, Rm0 = 0 W. Setting of the FLOC parameters can be done on the local human-machine interface (HMI) unit under the menu: Setting / Functions / Group 1 / … protective relay calculations and settings pcsbr com. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. calculation: IDMT Characteristics . = 7SA522. These spreadsheets below will make your endless calculations much easier! DISTANCE RELAYS FUNDAMENTALS J. G. Andrichak, G.E. ZL RF 120% 40% 60% 80% 100% 20% 140% XL RL R jX ZL=RL+RF + jXL 1Ω 2Ω 3Ω 4Ω •Distance Proportional to RF+ZL. MiCOM P643 Calculations. 5. 1MRS756605 Distance Protection Application and Setting Guide REF 542plus 5 1. 21. If you continue browsing the site, you agree to the use of cookies on this website. Hence, actual operating time of the relay is 3 × 0.1 = 0.3 sec. See our Privacy Policy and User Agreement for details. 2. endstream endobj 262 0 obj <>stream 266 0 obj <>/Filter/FlateDecode/ID[<9F7163E542B4364C89D1714C4DD16B6A>]/Index[257 15]/Info 256 0 R/Length 70/Prev 501723/Root 258 0 R/Size 272/Type/XRef/W[1 3 1]>>stream stabilized differential relays place intentional impedance in the differential leg of the CT circuit to create a current divider that forces most of the false differential current to flow away from the relay. sample relay setting calculation. Calculate LT & HT Side IDMT Over Current Relay PSM. 4. motor protective settings 101308 levine lectronics and. Percentage restrained differential relays measure the individual branch currents and quantify the through current in the zone of protection.  Alternatively, if the current plug setting is chosen as 125% (6.25 A), the fault current through the relay will be 50/6.25 = 8 A. Scope This document introduces the application of the distance protection function in the REF 542plus feeder terminal. One approach to making a distance relay with a computer is to calculate the apparent 1. As the impedance of a transmission line is directly proportional to its length, it can easily be concluded that a distance relay can only operate if fault is occurred within a predetermined distance or length of line. 1. 1.04 Model No. See our User Agreement and Privacy Policy. %PDF-1.6 %���� Calculations are often done in Microsoft Excel, although we have also used other tools and can adapt to the needs of our clients. Calculate LT & HT Side IDMT Over Current Relay Setting (50/51) Calculate LT & HT Side IDMT Over Current Relay Pick up setting. Distance protection explanation with formulas and simple procedures for beginners. CT / PT RATIO : 2. Reactance* 80 % of Protected Line} Our software is the only cloud-based solution and has been built from the ground up to be fully responsive - meaning you can access your cables from anywhere and on any device, desktop, tablet or smartphone. endstream endobj 261 0 obj <>stream Quadrilateral characteristics require even more. Now customize the name of a clipboard to store your clips. calculation scribd. Modern digital relays provide several outstanding methods for detecting ground faults. 9o�#.��}� �*&� n�: rem 610 motor protection relay library e abb com. DISTANCE PROTECTION CALCULATION: h�bbd```b``� "3A$�.�H0�d���� r�T ɘH�?�����8�������p�/@� �� 257 0 obj <> endobj Substations %%EOF Zero Sequence Resistance 100% of Line = {Line Length * Zero Clipping is a handy way to collect important slides you want to go back to later. module 6 distance protection setting of distance relays… ZONE SETTINGS: Length} New directional elements and distance polarization methods make ground fault detection more sensitive, secure, and precise than ever. Arc Resistance (Secondary) for Phase to Phase Fault = Sequence Resistance Ω / Km}. MiCOM P546 Calculations. Zone – 1 = 80% of Protected Line Calculation of IDMT Over Current Relay Settings (50/51/50N/51N) Calculation model for thermal relay Siemens 7SJ64; Motor Protection Relay Selection Curves 6. 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