Selection: Derate relay to 70% and use arc suppression Examples: Power Supplies, LED Drivers Characteristic: High inrush current (5-20x) but short Selection: Consider pre-charge or inrush-limiting relays Examples: Tungsten, Halogen Characteristic: Cold resistance is. Selection: Derate relay to 70% and use arc suppression Examples: Power Supplies, LED Drivers Characteristic: High inrush current (5-20x) but short Selection: Consider pre-charge or inrush-limiting relays Examples: Tungsten, Halogen Characteristic: Cold resistance is. e applications. Our relay products include COTS (commercial of-the-shelf), Mil-Spec, plus highly specialized, and custom-de manufacturers. From a broad range of small countertop appliances to major home appliances and other in-home equipment, TE relays switch heating elements, motors, compressors. Offering the global standard in safety. Meeting our customers' every need with numerous variations. We largely divide relays based on the maximum switching current value. Selective short-circuit protection can be achieved in different ways, such as: Time-graded protection Time- and current-graded protection A straightforward way of obtaining selective protection is to use time grading. The principle is to grade the operating times of the relays in such a way that. Prior to any use of this standard, in part or in whole, by another standards development organization, permission must first be obtained from the IEEE Standards Activities Department (stds. Abstract: Service conditions, electrical ratings. Coto Technology, Inc. This. Protective relays and devices have been developed over 100 years ago to provide “last line” of defense for the electrical systems.