Installation Instructions

Document No. DPD01375
Installation Instructions
August 24, 2018
Siemens Industry, Inc.
Page 35 of 36
Figure 47. Standard Motor Overload.
NOTE:
Set the overload relay by rotating the adjustment knob so that the arrow is aligned with the desired
overload threshold, calibrated in Amps.
The Siemens overloads provided with the bypass units are set at the factory according to the NEC
motor tables. For proper protection, adjust the overload to the FLA of the connected motor. The
provided overloads are designed for 125% load. If a lower rating is desired, use the following formula to
determine the setting to be used on the overload:
Desired %/125 = Multiplier
Motor FLA * Multiplier = Setting for Overload.
Example:
The motor nameplate date reads that the service factor (SF) is 115. The motor
nameplate data reads that the motor FLA is 30A. The formula would be as follows:
115/ 25 = .92
30 * .92 = 27.6
The dial would be set as close as possible to 27.6.
Figure 48. Customer Power Line Input Connections, Typical Disconnect with Fuses Models.