Home Products About Us Resources Contact SEALED CONTACTORS PROTECT OUTDOOR HARMONIC FILTERS FEBRUARY 19, 2021 SEALED CONTACTORS PROTECT OUTDOOR HARMONIC FILTERS MANY HARMONIC FILTERS USE NEMA 3R OUTDOOR CABINETS IN BLOWING DUST OR HIGH HUMIDITY ENVIRONMENTS. A HARMONIC FILTER AWAITING INSTALLATION IN THE FIELD FOR 30 DAYS CAN COLLECT ENOUGH DUST ON THE CONTACTOR TO FAIL ON STARTUP. FURTHERMORE, A FAILED CONTACTOR REMOVES THE CAPACITORS FROM THE HARMONIC FILTER CIRCUIT, SEVERELY REDUCING FILTER PERFORMANCE, SEE FIGURE 1 BELOW. HOWEVER, SEALED CONTACTORS PROTECT OUTDOOR HARMONIC FILTERS FROM THIS CONTAMINATION. UNFORTUNATELY, IT IS DIFFICULT TO DETECT FAILED CONTACTORS IN A UNIT WITHOUT CONTINUOUS GRID MONITORING. AS A RESULT 35% THID IS SENT TO THE GRID INSTEAD OF 5% THID. THEREFORE, HOW MUCH OF THE LARGE VOLTAGE DISTORTION PROBLEMS IN THE PERMIAN BASIN RESULT FROM HARMONIC FILTERS WITH FAILED CONTACTORS? IN SHORT, MEASURE YOUR HARMONIC FILTER PERFORMANCE, YOU PAID FOR CAPACITANCE AND 5% DISTORTION, NOT 35% DISTORTION. SEALING CONTACTORS REQUIRES ELECTRICAL, MECHANICAL, THERMAL, AND COMPLIANCE ENGINEERING KNOWLEDGE AND TESTING. FOR THIS PURPOSE, CTM REVIEWED AND TESTED MANY OPTIONS PRIOR TO SELECTING A SEALED CONTACTOR SOLUTION. ADDITIONALLY, CTM MANUFACTURES HARMONIC FILTERS IN OUR UL 508A LISTED PANEL FACILITY. OUR SEALED CONTACTOR SOLUTION MAINTAINS OUR UL LISTING. SEALED CTM CONTACTORS HAVE BEEN THERMALLY AND ENVIRONMENTALLY TESTED TO ENSURE FULL RATINGS AND A LONG LIFE EXPECTANCY. 100% OF CTM’S GRIDHAWK®, GRIDHAWK® HD, AND GRIDHAWK® XD HARMONIC FILTERS NOW HAVE SEALED CONTACTORS SUITABLE FOR OUTDOOR HARSH ENVIRONMENTS. CONTACT CTM TODAY FOR MORE INFORMATION. DOWNLOAD WHITE PAPER MORE RESOURCES CTM FILTERS LOWER PM MOTOR DRIVE INVESTMENT FEB 23, 2021 HIGH FREQUENCY FILTERING FOR HIGH SPEED MOTORS FEB 22, 2021 GRIDHAWK® SERIES ADVANTAGES FEB 21, 2021 FILM CAPACITORS VS. ELECTROLYTIC CAPACITORS FEB 20, 2021 CTM SINE WAVE FILTERS DON’T CREATE COMMON MODE NOISE FEB 18, 2021 IMPACT OF CABLE CONNECTION LENGTH ON HARMONIC DISTORTION FEB 17, 2021 RELATED PRODUCTS SINE 60TM (60 HZ) SINE WAVE FILTERS FLEXSINE® (60-120 HZ) SINE WAVE FILTERS HIGHSINETM (60-500 HZ) SINE WAVE FILTERS SMALL / QUIET / EFFICIENT / RELIABLE STOP TRYING TO MAKE SILICON STEEL "WORK" CONTACT US  480.967.9447  710 W GENEVA DR TEMPE, AZ 85282 CONTACT US QUALITY POLICIES i CTM Ethics Policy i CTM Conflict Free Policy i REACH and RoHS Declaration i CTM Limited Warranty SIGN UP FOR THE CTM NEWSLETTER Get industry news, updated resources, and product updates delivered straight to your inbox. SUBSCRIBE CTM Magnetics © 2021