A sample of a star delta uni-directional starter wiring diagram for a 55kW 400V motor is included in the pdf version of this article. The full load current (103A) for the motor has been taken from the load table in section 02-09-10-00 entitled motor load data of this article. The starter is located in a compartment number 4 of cubicle 5 in MCC ident 16.
It is a separate file entitled starter wiring diagram.pdf with an original size of A0 (1189mm x 841mm) printing on to an A0 sheet will give a scale of 1:1, A1 a scale of 0.707:1, A2 a scale of 0.5:1 and A3 a scale of 0.353:1. To be able to read the drawing a recommended minimum paper size of A2 should be used, at the stated scaling the text on the drawing has a minimum height of 0.9mm.
The drawing shows the wiring of a compartment housing the starter, it shows only the internal wiring of the compartment. The manufacturers of the various components are fully detailed, it must be emphasized that the components have been selected for their quality and reliability alone, and sized for a life in excess of 2.5 million motor start stop cycles.
The drawing is the copyrighted property of Keemag Ltd.
It is included so that readers of this article can appreciate the complete integration of all the various sections of this article. It must not be used for commercial gain.
Drawings and specifications for commercial use for named clients, projects and project engineers are available for purchase.