In short: pulling an ordinary plug on a running motor draws an arc that can burn the technician and the contacts. A switch-rated plug breaks the circuit inside the socket before the plug comes out. BTGC supplies MARECHAL ELECTRIC DECONTACTOR plugs and sockets, including explosion-proof versions, in Saudi Arabia.
Plants are full of motors that are moved, swapped or serviced regularly: pumps on skids, conveyor drives, welding machines, portable fans and mobile generators. Each one is connected through a plug and socket, and each connection is a point where someone can be hurt.
The arc behind the plug
When a plug is pulled under load, the current does not stop at once. It jumps the widening gap as an arc. On a 400 A motor circuit the arc carries enough energy to burn skin, weld contacts and ignite gas. The usual safeguard is an upstream switch with an interlock, which adds cost, wiring and a second place to lock out.
What a switch-rated plug does
A DECONTACTOR combines the plug, the socket and the switch in one unit. Pushing the release button opens the switch inside the socket first; only then can the plug be withdrawn, and the pins are already dead. Plugging in reverses the sequence. The features that matter in a Saudi plant:
| Feature | Benefit |
|---|---|
| Load-break switch built into the socket | Connects and disconnects under full load without an arc at the pins |
| Silver-nickel butt contacts | Stable contact resistance after thousands of operations |
| Ingress protection to IP66/IP67 | Dust and wash-down resistance for outdoor and process areas |
| Lockout facility | Padlock the socket for isolation during maintenance |
| Voltage and frequency keying | A 400 V plug cannot enter a 690 V socket |
| Ratings from 20 A to 400 A and beyond | Covers small tools to large motors and generators |
MARECHAL ELECTRIC from BTGC
MARECHAL ELECTRIC of France has made industrial connection systems since 1952, with nearly 100 patents behind the DECONTACTOR technology. The range BTGC supplies in the Kingdom covers:
DECONTACTOR plugs and sockets with an integral load-break switch
High-current connectors up to 700 A for mobile generators and shore power
Explosion-proof plugs and sockets for ATEX and IECEx hazardous areas
Applications in the BTGC catalogue are mobile welding machines, pumps, conveyors and port and marine power. See our page for Marechal Electric in Saudi Arabia and the full electrical and power systems offer.
Where Saudi plants use them
Steel mills and ports: overhead crane power connections and mobile equipment in melt shops, alongside the crane components BTGC supplies to the same plants.
Oil and gas: hazardous-area connections for portable pumps and lighting.
Water and utilities: submersible pump connections at lift stations.
Construction mega-projects: temporary power distribution and generator connections.
BTGC support in Dammam, Jubail and Yanbu
BTGC stocks common ratings in the Kingdom and supplies the matching cable glands and mounting boxes. For a quotation send the current rating, voltage, number of poles, the environment (indoor, outdoor, hazardous zone) and whether a lockout is required.
Questions buyers ask
Do I still need an upstream isolator? The DECONTACTOR is rated as a motor circuit switch and local disconnect; check the plant electrical standard for the installation class.
Are hazardous-area versions certified? Yes, ATEX and IECEx certified models cover Zone 1, 2, 21 and 22.
Can old sockets be replaced one for one? Usually yes; BTGC checks the mounting dimensions and the keying.
Contact the BTGC power team
Email power@btc-ksa.com or call +966 13 856 0528. Branches: Dammam, Jubail and Yanbu. Request a quote.