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These motors are sometimes called DC motors, sometimes EC motors and occasionally DC/EC motors. DC stands for direct current and EC stands for electronically commutated.. DC motors allow the speed of the fans within a fan coil unit to be controlled by means of a 0-10 Volt input control signal to the motor/s, the transformers and speed switches associated with AC fan coils are not required.
Note: these fuses were manually traced from the following pdf-datasheets: (No part of the original PDF remains in this SVG file) Littlefuse.com: datasheet of Micro2 fuse; Littlefuse.com: datasheet of Micro3 fuse actually used version, with vector graphic of fuse) Littelfuse.com: datasheet of low-profile mini fuse
Where space permits, a miniature circuit breaker is sometimes used to replace a blade-type fuse in the same fuse holder. Blade fuses use a common coloring scheme for the Micro2, Micro3, low-profile (LP) Mini, Mini, and regular size fuses, and a partial color similarity with the maxi size fuses.
Low-voltage high rupture capacity (HRC) fuses are used in the area of main distribution boards in low-voltage networks where there is a high prospective short circuit current. They are generally larger than screw-type fuses, and have ferrule cap or blade contacts. High rupture capacity fuses may be rated to interrupt current of 120 kA.
In electrical distribution, a fuse cutout or cut-out fuse (often referred to as a cutout) is a combination of a fuse and a switch, used in primary overhead feeder lines and taps to protect distribution transformers from current surges and overloads. An overcurrent caused by a fault in the transformer or customer circuit will cause the fuse to ...
An assortment of thermal fuses. A thermal cutoff is an electrical safety device (either a thermal fuse or thermal switch) that interrupts electric current when heated to a specific temperature. These devices may be for one-time use (a thermal fuse), or may be reset manually or automatically (a thermal switch).