Attach a ground wire from one of the threaded studs (A) at the bottom of the housing, to the mounting plate (B). The ground resistance between all system parts shall be <. Equipment Protection: Grounding protects substation equipment from potential damage from lightning strikes, fault currents, and transient overvoltages. The longevity and dependability of essential electrical components are both preserved with the assistance of this protection. System Stability: A. Utility Service: The system grounding is usually determined by the secondary winding configuration of the upstream utility substation transformer. SEC Distribution System extends from the MV (33 kV, 13. The drive system in this manual consists of the supply transformer, input power cable of the drive, the variable speed drive (frequency converter), motor cable and motor. Each DISTRIBUTION BOX and controller must be grounded. 26 mm 2 (10 AWG) ground wire must be used, and in all other markets a 6 mm 2 must be used.
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