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Summary of Contents for WEBTEC RMS Mors Smitt 2V75
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2V75 User Guide Metrosil Module RMS Mors Smitt Advanced Protection Devices User Guide www.morssmitt.com/rms Page 1 Visit for the latest product information. Due to RMS continuous product improvement policy this information is subject to change without notice. 2V75_User_Guide/Iss C/08/05/23...
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2V75 User Guide About This Manual This User Guide covers all 2V75 relays manufactured from May 2023. Earlier products do not necessarily incorporate all the features described. Our policy of continuous development means that extra features & functionality may have been added. The 2V75 User Guide is designed as a generic document to describe the common operating parameters for all relays built on this platform.
Documentation Technical Bulletin The detailed technical attributes, functional description & performance specifications for the 2V75 are described in the product Technical Bulletin. The order of precedence for product information is as follows: • Technical Bulletin • User Guide User Guide This User Guide covers all 2V75 relay versions &...
Introduction The 2V75 Metrosil module is designed for application with high impedance differential protection schemes. An external Metrosil module having a nonlinear resistance characteristic is required for each phase element to limit the peak voltage appearing across the secondary differential circuits under internal fault conditions.
Typical Connection Diagrams Modules with Internal Shunt Wiring Modules Suitable for External Shunt Wiring Note: Internal shunt wiring is only available on variants with a Metrosil. www.morssmitt.com/rms Page 6 for the latest product information. Due to RMS continuous product improvement policy this information is subject to change without notice. 2V75_User_Guide/Iss C/08/05/23...
Installation Safety Section This Safety Section should be read before commencing any work on the equipment. The information in the Safety Section of the product documentation is intended to ensure that products are properly installed and handled in order to maintain them in a safe condition. It is assumed that everyone who will be associated with the equipment will be familiar with the contents of the Safety Section.
Unpacking Upon receipt inspect the outer shipping carton or pallet for obvious damage. Remove the individually packaged relays and inspect the cartons for obvious damage. To prevent the possible ingress of dirt the carton should not be opened until the relay is to be used. Refer to the following images for unpacking the relay: Outer packing carton showing shipping documentation pouch.
Dimensions www.morssmitt.com/rms Page 9 for the latest product information. Due to RMS continuous product improvement policy this information is subject to change without notice. 2V75_User_Guide/Iss C/08/05/23...
Typical Rack Mounting with 2V75 mounted into a 19” sub rack frame with rack mount bracket www.morssmitt.com/rms Page 10 for the latest product information. Due to RMS continuous product improvement policy this information is subject to change without notice. 2V75_User_Guide/Iss C/08/05/23...
Typical surface mounting arrangement with surface mount bracket www.morssmitt.com/rms Page 11 for the latest product information. Due to RMS continuous product improvement policy this information is subject to change without notice. 2V75_User_Guide/Iss C/08/05/23...
Example of Rack Mounting Installation 1 x Front panel 4 x front panel locating thumb screws 1 x panel mount kit 1 x panel mount kit self threading screws Panel mount plate being screwed into 19 inch sub rack. Rear of panel mount plate showing fibreglass insulating plate &...
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Earth connection to panel mount plate. Connect other end to Metrosil module earth point. Load the Metrosil module into the rear of the cubicle & locate onto the panel mounting plate. This photo shows the Metrosil module in position viewed from the rear. Note the clear polycarbonate terminal cover.
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This photo shows the Metrosil module location lugs protruding through the front mounting plate. Screws are being fitted to secure the Metrosil module. Remove clear polycarbonate terminal cover screws and mounting pillars which hold the rear door closed. Swing open the rear door to access the stabilizing resistors.
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Loosen the moving terminal to adjust the nominal value of each resistor. Do not attempt to force the moving terminals to slide as this may damage the resistance wire. www.morssmitt.com/rms Page 15 for the latest product information. Due to RMS continuous product improvement policy this information is subject to change without notice. 2V75_User_Guide/Iss C/08/05/23...
Equipment Operating Conditions The equipment should be operated within the specified electrical and environmental limits. Protective relays, although generally of robust construction, require careful treatment prior to installation and a wise selection of site. By observing a few simple rules, the possibility of premature failure is eliminated, and a high degree of performance can be expected.
Decommissioning & Disposal Decommissioning: The auxiliary supply circuit in the relay may include capacitors across the supply or to earth. To avoid electric shock or energy hazards, after completely isolating the supplies to the relay (both poles of any dc supply), the capacitors should be safely discharged via the external terminals prior to decommissioning.
Maintenance Mechanical Inspection Module Assembly Inspect the module for obvious signs of damage or ingress of moisture or other contamination, signs of overheating burn marks which may have been caused by overvoltage surge or transient conditions on the protection scheme. Test Intervals The maintenance tests required will largely depend upon experience and site conditions, but as a general rule it is recommended that the following inspection and tests are performed every twelve...
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