The present invention relates to the field of electrical power connectors, and in particular power connectors that are used to connect a source of mains power to an item of electrical equipment. A locking panel socket (1) for making an electrical connection with a line plug comprises a socket connection portion (2) having an end face (11) and the end face having a plurality of recesses (10, 10′) for receiving corresponding power pins of a line plug, a plug insertion channel (4) that extends around the socket connection portion (2) and a panel portion (6) that extends around the plug insertion channel (4). The locking panel socket (1) also includes within the socket connection portion a locking mechanism (12) for restraining a power pin of a line plug from being withdrawn from one of the recesses (10′), and a release mechanism for releasing the locking mechanism (12) to permit the power pin to be withdrawn from the recess. The release mechanism includes an actuation portion (60) and a linking portion (30, 46, 56) that links the actuation portion with the locking mechanism (12). The actuation portion (60) is manually accessible on the panel (6) and the linking portion (30, 46, 56) extends from the actuation portion (60) to the locking mechanism (12).