P841/D3, May 2018 is a technical standard focused on cooled, totally enclosed fan cooled (TEFC) squirrel cage induction motors up to and including 370 kW (500 hp). It is relevant to motor design, performance expectations, and related engineering practice where reliable rotating equipment is required. For buyers, engineers, and compliance teams, this document helps define a clear reference for evaluating motor characteristics in power, energy, and industrial applications.

About P841/D3, May 2018

P841/D3, May 2018 addresses the technical context of TEFC squirrel cage induction motors within a defined power range, making it useful for products that depend on controlled thermal behavior, enclosure design, and dependable operation. The standard is associated with components, circuits, devices, and systems, which suggests a role in specifying how these motors are characterized or assessed in engineering documentation. As an inactive standard, it may still be consulted for legacy designs, procurement references, or comparison against later requirements.

Where is P841/D3, May 2018 used?

This standard is most relevant where cooled TEFC squirrel cage induction motors are selected for industrial drives, pumps, fans, compressors, conveyors, and similar equipment. It may be used by design engineers preparing motor specifications, by procurement teams comparing product ratings, and by maintenance groups reviewing replacement compatibility. In power and industry applications, the document helps align motor selection with expected operating conditions, enclosure type, and output range up to 370 kW (500 hp).

Importance in practice

In practice, P841/D3, May 2018 supports consistency in how medium- to high-power induction motors are specified and reviewed. Clear technical requirements can reduce selection errors, improve comparability between suppliers, and help teams verify that the motor suits the intended duty and cooling approach. For industrial users, this matters for performance reliability, safe integration, and lifecycle planning. It also provides a useful point of reference when documenting compliance or evaluating older equipment against established engineering criteria.

• TEFC squirrel cage induction motor scope
• Up to 370 kW (500 hp) output range
• Cooled motor construction context
• Industrial and power-system applications
• Useful for specification and comparison