If a client desires abbreviated documentation, we are prepared to provide such. ABB RET670 Calculations. 5. Types of Distance or Impedance Relay. Distance Relay Coordination and Protection Analysis Software. 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 / … 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). 1MRS756605 Distance Protection Application and Setting Guide REF 542plus 5 1. Distance Relay Setting calculation - Free download as Excel Spreadsheet (.xls / .xlsx), PDF File (.pdf), Text File (.txt) or read online for free. 6. 4. IDMT Relay High Current setting :Plug setting of Relay is 2.5 Amp and Time Delay (TMS) is 0.100 Sec, Relay Curve is selected as Normal Inverse Type; Calculation of Over Current Relay Setting: (1) Low over Current Setting: (I>) Over Load Current (In) = Feeder Load Current X Relay setting … Sequence Reactance Ω / Km} Positive Sequence Reactance = {Line Length * Positive Sequence Calculate LT & HT Side IDMT Over Current Relay Time setting. Zone – 1B = 100% of Protected Line 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. i.e. 1.04 Model No. Percentage restrained differential relays measure the individual branch currents and quantify the through current in the zone of protection. See our Privacy Policy and User Agreement for details. These spreadsheets below will make your endless calculations much easier! Zone – 3 = 100% of Protected Line + 150% of Adjacent Longest Line 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 9. = {Tower Footing Resistance (Primary) * CT / PT Ratio} ‘ Modern digital relays provide several outstanding methods for detecting ground faults. 1.03 Make = SIEMENS. Hence, actual operating time of the relay is 3 × 0.1 = 0.3 sec. 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 ETAP. Resistance* 80 % of Protected Line} Once the in-service settings are applied, commissioning should include testing of enabled functions to ensure the application is performing as planned. '�Pkp����A�c� ���Ϧ���c�����S��y�V�EE�Yr酛��� ���#%�r-g�5��>-�k2�E��;3�9>���̀�=�t��r�������F�m�� l Calculate Actual Operating time according to Various IES Curve. ��,Ǚ���?�Z|�q����4�i�㲌�2'���_S��U��� ���� 3. Line Distance. 9o�#.��}� �*&� n�: You can change your ad preferences anytime. ZONE SETTINGS: Alternatively, 0.15A is the minimum diff current required for relay operation if the system loading is 0.5A (sec). Accordingly, relay settings = current plug tap 5 A (100%) and time multiplier 0.8. CTR = 800 /1. With the proper education, tools, and references such as company standards available, a protective relay calculations and settings pcsbr com. 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. Calculate LT & HT Side IDMT Over Current Relay PSM. CALCULATIONS: sample relay setting calculation. IDMT Curves; Transformer Differential. Positive Sequence Reactance 100% of Line = {Line Length * Positive 2.04 Protected Line length. endstream endobj 258 0 obj <> endobj 259 0 obj <>>>/Rotate 0/Tabs/S/Type/Page>> endobj 260 0 obj <>stream This permits the use of the same time multiplier setting for several relays in series. Length} See our User Agreement and Privacy Policy. Time distance relay.  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. f j�Ha��Q �b� ���``6S�`R$�lV���� pd`}�H��8�"?1�ae�e��ƨ[��q�\&E�y��lLl�a�l@�1�.�D�{� �D:@ڟ���8 If you continue browsing the site, you agree to the use of cookies on this website. Calculation of IDMT Over Current Relay Settings (50/51/50N/51N) Calculation model for thermal relay Siemens 7SJ64; Motor Protection Relay Selection Curves Line Differential. Irest= 0.3 x 0.5 = 0.15A (see point P on the restraint characteristic). 1. Substations A Technical Reference Document Power Plant and Transmission System Protection Coordination Draft 6.9 – November 19, 2009 NERC System Protection and Control Subcommittee rem 610 motor protection relay library e abb com. H�\��j�@��z�9&���������aX�>�,�A, Y>��wJ��Y��C�ݩ��)\���w�O�µ]3�-�ͥ�4��9\��iH�ʥ���u���a���?�6L]v��G�n��.��]��k׆S�{N3�І�X7a��sH�,^kW��k����o�ˎ�潞����,���[��J~���U��%��99�,d{�+Y�F6�3��"���&�PK�%�hII.��� 21. Alexander General Electric Co Malvern, PA INTRODUCTION Distance functions have been in use for many years and have progressed from the original electro-mechanical types thr ough analog types and now up … Calculate LT & HT Side IDMT Over Current Relay Setting (50/51) Calculate LT & HT Side IDMT Over Current Relay Pick up setting. CT / PT RATIO : Zone – 1 = 80% of Protected Line Electrical Protection & Control. h�bbd```b``� "3A$�.�H0�d���� r�T ɘH�?�����8�������p�/@� �� 0 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. These spreadsheets below will make your endless calculations much easier! Calculation of IDMT Over Current Relay Settings (50/51/50N/51N) Calculation model for thermal relay Siemens 7SJ64; Motor Protection Relay Selection Curves 1. 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. H��V�n�F��+�H�CR����� ^$�b�7o��W,��L����tUϐ�� �A�. motor protective settings 101308 levine lectronics and. Powerfactory. 2. New directional elements and distance polarization methods make ground fault detection more sensitive, secure, and precise than ever. REF relay setting calculation REF RELAY SETTING CALCULATION. Quadrilateral characteristics require even more. sample relay setting calculation. We are accustomed to providing calculation and relay setting documentation in meticulous detail. endstream endobj 262 0 obj <>stream Advances in communications-aided protection further advance sensitivity, dependability, speed, and fault resistance coverage. %PDF-1.6 %���� calculation: IDMT Characteristics . %%EOF {½ * Primary Arc Resistance * CT / PT Ratio} Reactance per Unit Length= {Positive Sequence Reactance / Line DISTANCE PROTECTION CALCULATION: Generator Protection Alstom Micom p343 Testing Procedure, Transformer protection Alstom make micom relay p64x/p63x testing procedure, Line Differential - Test report for Alstom make Micom P546 relay, Motor Protection P225 Alstom make testing using sverker750, Sel411l line differential relay testing procedure, RET 670 transformer protection - testing procedure, Testing procedure and electrical tests done on battery and battery charger, Alstom 14x feeder protection testing procedure, No public clipboards found for this slide, Distance protection calculation formulas and procedures, Senior Power System Electrical Engineer. 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