IEC60851-3 Rectangular Wire Mandrel Winding Test Apparatus Bending arm length 300mm and 400mm

Rectangular Wire Mandrel Winding Test Apparatus

1. Introduction

The rectangular wire mandrel winding test apparatus is designed according to IEC60851-3 clause 6.2.2 figure 4 and GB/T4074.3 clause 6.2.2 figure 4. It’s suitable for winding testing of various rectangular wires with a nominal conductor diameter of 1.60mm or less—including enameled rectangular wire, paper-insulated rectangular wire, glass-fiber-insulated rectangular wire, and film-wrapped wire—as well as corresponding copper and aluminum rectangular wires.

A straight piece of wire approximately 400mm in length shall be bent through 180° round a polished mandrel of the diameter given in the relevant standard in two directions to form an elongated S-shape. The straight part between the U-shape bends shall be at least 150mm. Care should be taken to ensure that the specimen does not buckle or depart from a uniform bend.

2. Specification