These are UL approved 50 and 63-Amp versions of Zettler's current HVAC/R definite purpose contactors. They are made to switch heavy loads in elevators, cranes, hoists, and other products. They have UL-rated contacts of 25-63 full-load amps, up to 600V and 155C coils rated Class F in voltages at 50/60Hz. They come with a dust-proof construction, non-position sensitive mounting, a universal mounting plate, various termination options, heavy-duty contacts, and EE lamination for using less power, Zettler Controls Inc.http://rbi.ims.ca/4928-585
Kaspersky Labs indicated at its February meeting that cyber attacks are far more sophisticated than previous thought. It turns out even air-gapping (disconnecting computers from the Internet to protect against cyber intrusion) isnít a foolproof way to avoid getting hacked. And Kaspersky implied the NSA is the smartest attacker.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.