Sprecher + Schuh's KT9 series of Motor Circuit Controllers are some of the most versatile and technologically advanced control products available today. These devices can be used in a variety of control schemes that reduce panel space, simplify installation and eliminate the need for more expensive equipment.

• Current-limiting short circuit protection
• Class 10 thermal overload protection
• Switching
• Signaling

The KTC9 has a fixed magnetic trip set at 18…22x the maximum value of the current adjustment range (as opposed to the KTA9s magnetic trip of approximately 14x adjustment range.) KTC9 are typically used in applications where nuisance tripping might occur, as with some high efficiency motors.

The KTB9 is designed without a thermal trip element (i.e., current adjustment range). It should be selected for applications where a separate motor overload protection device is used, such as on CLE7 Three Component Starters. Magnetic trip is approximately 14x operational current for the KTB9 (approximately 13x for the KTB7-45H).