Illustration 9.3: Connection to 24 V back-up supply on Unit Sizes
15, 21, 22, 31 and 32.
9.10 Brake Resistors
In applications where the motor is used as a brake, energy is generated in the motor and send back into the frequency converter. If the energy can not be
transported back to the motor it will increase the voltage in the converter DC-line. In applications with frequent braking and/or high inertia loads this increase
may lead to an over voltage trip in the converter and finally a shut down. Brake resistors are used to dissipate the excess energy resulting from the regenerative
braking. The resistor is selected in respect to its ohmic value, its power dissipation rate and its physical size. GE offers a wide variety of different resistors that are
specially designed to our frequency converters. See the section Control with brake function for the dimensioning of brake resistors.
9.11 Remote Mounting Kit for Keypad
The Keypad can be moved to the front of a cabinet by using the remote build
in kit. The Unit Size is the IP65. The fastening screws must be tightened with
a torque of max. 1 Nm.
Ordering no. RMKYDAC
Illustration 9.4: Keypad Kit with graphical Keypad, fasteners, 3 m cable and gasket.