Powerlock

They are typically used for connecting to large generators and fixed power sources in venues where high-powered temporary equipment may be regularly used.

The Powerlock connector has safety features that help to protect the user against potentially fatal electric shock and other dangers as a result of connection errors.

Such features include finger proof electrical contacts, colour-coded insulators, mechanical keys and locking devices.

[9] Powerlock features a locking mechanism which requires the use of a special tool to disconnect the connector.

For this reason all single-pole connectors including Powerlock are intended to be operated (connected and disconnected) only by trained professionals.

Panel Source connectors mated with Line Drain connectors. 3P+N+E. For scale, the cables are approximately 25 mm (1 in) in diameter.
Inline Source (male) connectors unmated. Note red caps providing touch protection of live contact to IP2X . [ 1 ]
Line Source connectors (top) mated with Line Drain connectors (bottom).
Panel Drain (female) connectors, for feeding power in to a portable distribution cabinet