About the 11C78K
11C78K Small Dynamic Contactor Brake Kit
The 11C78K is a Small Dynamic Contactor Brake Kit originally sold by Reliance Electric as a kit addition or replacement part for their drive systems. It is rated ¼ to ½ HP. Parts like this one were sometimes sold under the company names Asea Brown Boveri and Baldor-Reliance. Dynamic braking kits are used to provide intermittent braking to the motor.
The 11C78K is a small board with multiple factory-made drill holes. The surface of the board is printed with a grid pattern. It is populated by the contactors (2,) by surface wiring with various types of ends, including terminal loops and stab-on (female) connectors, and a long terminal strip. The board also uses a transistor, a polyester vinyl capacitor, a wire wound resistor, several diodes, and several carbon composite resistors. The board carries several imprinted codes and has multiple labels affixed to its surface with additional information.
For more detailed instructions on board installation or operation, or for more information regarding the proper handling of this board, please refer to data sheets or product manuals for the 11C78K. These materials were usually provided by Reliance with your OEM purchase.
