Measurement Devices - Federal Elektrik - #9

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Untitled table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:4.00pt "Arial", sans-serif; } .font1 { font:5.00pt "Arial", sans-serif; } .font2 { font:7.00pt "Arial", sans-serif; } .font3 { font:8.00pt "Arial", sans-serif; } .font4 { font:9.00pt "Arial", sans-serif; } .font5 { font:11.00pt "Arial", sans-serif; } .font6 { font:15.00pt "Arial", sans-serif; } .font7 { font:16.00pt "Arial", sans-serif; } .font8 { font:23.00pt "Arial", sans-serif; } .font9 { font:12.00pt "Georgia", serif; } .font10 { font:4.00pt "Lucida Sans Unicode", sans-serif; } .font11 { font:14.00pt "Microsoft Sans Serif", sans-serif; } MEASUREMENT DEVICES FAA200 Over Current Protection Relays: Basically. they have been developed to provide 3 phases and one ground protection and can be used with high level of saîety thanks to demountable transformer structure. There are 15 warning/notice leds, as 4 of them are multi-coiored, and 4 control buttons on front (ace of FM200 Over Current Relay with large LCD Display. Thèse control buttons are used to each menus to rnake Relay adjustments. AH the set values belonging to a phase or ground can be seen with current information on the LCD display, Relay allows separate adjustment for phases and grounding. In accordance with IEC spécifications, it has Thermal Opening, Delayed Instant Opening and instant Opening functions. For Thermal Opening, one of the curves prepared in accordance with IEC standards or ANSI standard can be selected. Furthermore, thanks to the user-defined curve in IEC menu, curve in any characteristic can easily be defined. In this way, ail the spécial opening curves can be realized in devices such as line, motor. transformer, rectifier etc. Opening delay can be changed linear by scrolling t1 variable on time axis upwards and downwards. For delayed instant opening, current fold and opening duration values can be entered in the Relay operating curves are enabled. The device gives an alarm as pre-warnîng when the current passing through the line reaches 90% of the nominal load and continues for 15 minutes. Opening and alarm opérations are kept in the memory by the Relay. Failurc time, duration. phase (or ground) and type of failure are kept in détail in this memory, which records the last 20 failures. Opening duration in milliseconds is recorded in instant openings. The relay compiles thèse data according to first in first out principle and provides them to the user in a séquence from last faiiure to first failure. Closing can be made again by seeing failure type and pattern. In normal conditions, cooling curves adjusted to opening curve should be used in protection function of devices such as motor etc. Because, opening duration should be shortened by considering previous stress in possible consécutive over current stresses. Otherwise, as opening duration shall always be reset in puise opération, the protected device may be damaged. In addition, immédiate reset may be required during over current in receivers such as aerial Unes. Because, it is easy to cool down aerial lines and many receivers may remain without electricity m case of opening. Therefore. cooling function may be left active or passive. The user enters only over current fold for instant opening. When peak point of over current sinus curve reaches this value entered, Relay opens the circuit without waiting. Normally, Systems draw high current at first due to a few reasons. For example, first start of transformers, drive of motors, enablement of capacitors, capacitive effects of long aerial lines etc. Due to thèse reasons, a delay in current detay may be required in cases where system is driven. A fixed delay can be entered in long time, delayed instant opening and instant opening functions depending on characteristics of thèse initial currents or they can temporarily be adjusted to a higher set value. When system starts up, thèse values are cancelled and nominal RS232 and GPRS connections are availabie through the sériai port on front face and RS232. RS485 and GPRS connection is avaiiabte through connectors on back face. LCD display is designed with 10x10 cm sizes in a way to indicate 4 current sizes simuitaneously, in addition to symbols, and ail the fixed coefficients saved for a pnase or ground. AH the fixed phase coefficients can be seen on the display by pressing buttons, Date-Time Information, Input-output statuses, détails of archive information, PC communication can be monitored on the display. Standard and curve sélection can be made easily Statua al input-OLdput ports ?.\ tfie retay tïHii hti 'ni owed l$ on ttiis screen eff LCD. 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