OPERATION AND MAINTENANCE MANUAL
MAC QM MOTORS
PAGE: 25
CODE: CTT42 EDITION: 01 RELEASE: JULY 2016
Subject to technical changes without prior notice
3.7
Electrical specifications
3.7.1
Windings and insulation
MAC QM motor coil windings are made up of copper wires with two coats of polyamide varnish > 220°C and/or THEIC-
Polyesterimide with Amide-Imide > 200°C, rated with H-type insulation class.
They are impregnated using single-component epoxy resins that polymerise on the basis of temperature, also class H.
The windings are insulated from the stator core using NMN sandwich-type paper (Nomex-Mylar-Nomex). The outer parts of the
sandwich (Nomex) are fibres, whereas the core (Mylar) is a plastic film of polyethylene terephthalate. Special care is also taken
with the insulation between each phase.
This insulation system guarantees appropriate dielectric resistance for the motor to work with frequency converters, even on the
most critical applications.
3.7.2
Connections
The standard connection execution of MAC QM is by Flying leads (2 meters of high flexible cable type PUR-HF). Other options
available on request.
The connections between the windings and the flying leads are made using a flexible cable coated with ETFE capable of
withstanding up to 150°C. The connections are welded using a FUSBAT650 rod. The welds of the contacts are also protected by
a double layer of fibreglass insulation pipe with class-H acrylic impregnation.
Summary of Contents for MAC QM
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