Laserfiche WebLink
<br />f~l\~"C~ <br /> <br />fOl\ ~~lnCOmlng line circuit breaker. <br />6. Incoming line reactor. <br />7. All components necessary to ensure compliance with IEEE 519 for general <br />systems: 5% voltage distortion factor and 22,800 voltmicroseconds <br />commutation notch area. It Is the intent of this Specification to achieve a <br />system that operates within the guidelines of IEEE 519 for general systems. <br />8. 24..vdc control circuitry. <br />9. Adjustable time delay for delaying motor drive restart after power failure; timer <br />range shall be 0 to 120 seconds, with initial settings differing by 10 seconds for <br />each drive; provide module which causes multiple attempts to restart. <br />10. Provision for automatic emergency shutdown In any mode, actuated by the <br />following: <br />a. Motor thermal protection (see Section 11002). <br />b. Any additional abnormal conditions as shown on the Drawings. Provide for <br />manual restart. <br />11. Auxiliary contacts for remote indication of t1Runll r "Motor Overtemperature" and <br />"VFD Fall." <br />12. Auxiliary contact for "In Manual11 or "In Auto." <br />13. Output speed signal consisting of 4-20 mA. <br />14. VFD able to withstand harmonic distortion and notching a defined In IEEE..519 <br />for dedicated system (10% voltage distortion factor and 36,SOO-volt <br />microseconds commutation watch area). . <br />15. Linearity and repeatability accuracy of 3-phase output of 1 % of analog input <br />control signal regardless of Input power voltage fluctuations between 437 and <br />505 volts. <br />16. Independent acceleration and deceleration controls, adjustable from 2 to 30 Hz <br />per second. <br />17. Displays indicated above integrated in an operator Interface keypad. <br />18. DevJceNet Interface connected and configured to PLC. <br /> <br />G. Protection: Protect VFD against the following conditions: <br />1. Reverse phase sequence and single phasing of input power. <br />2. Input power fallure. <br />3. Input transient voltages, Including peak suppression and snubbers, In <br />accordance with ANSI C37.90. <br />4. Radio and television Interference. <br />5. Output overcurrent. <br />6. Input overcurrent (see Item 2.01 F.5 above). <br />7. Motor overtemperature. <br />8. Cabinet overtemperature. <br />9. Undervoltage: VFD shall automatically shut down If Input voltage falls below <br />414 volts with automatIc restart upon return to a stable 437 volts or more. <br /> <br />H. Construction: <br />1. Housed within a motor control center specified In Section 16920. <br />a. Door-mount the following devices: <br />1) Power On Indicating light. <br />2) Manual-Oft..Auto selector switch. <br />3) On-Off switch. <br />4) Manual Speed potentiometer. <br /> <br />i- <br /> <br />Variable Frequency Drives (VFD) <br /> <br />Page 4 of 6 <br /> <br />Shop Drawing Preparation PaCkage <br />0988015.00 <br />C Kennedy/Jenks Consultants 2009 <br />