DOL Starter

Product Details:

“SAIEX” Flameproof DOL (Direct-On-Line) Starter Control Station is an electrical control device enclosed in a flameproof (explosion-proof) housing, designed for use in hazardous areas where flammable gases, vapors, or dust may be present.

It is used to directly start and stop motors safely by supplying full line voltage to the motor through a manual push button or selector switch, while ensuring that any sparks, arcs, or internal faults generated inside the enclosure do not ignite the surrounding explosive atmosphere.

Various Names

Flameproof DOL Starter Control Station is also known as Explosion Proof DOL Starter, Ex d Motor Starter Control Station, Hazardous Area DOL Starter, Flameproof Motor Starter Panel, ATEX DOL Starter, IECEx DOL Starter Control, Industrial Flameproof Motor Starter, EEx d DOL Starter Station, Flameproof Push Button DOL Starter.

Gas Group: IIA & IIB, Temperature class: T6, Zone: 1/2 & 21/22 

IP Protection: IP 65 as per IS/IEC 60529: 2001

Colour: Epoxy Grey 631 (Other option Pebble Grey 7032, 7035 & Pure White 9010)

Gasket: Endless Molded Neoprene

MOC: Cast Aluminium Alloy LM-6

Earthing: 1 nos inside & 2 nos outside

Electrical Maximum Rating: 125Amp/250Amp, 240V AC/415V AC

Marking Plate: (Ex db IIB T6 Gb) (Ex tb IIIC T85^o C Db)

HP: 20 HP, 25 HP, 30 HP, 35 HP, 40 HP, 45 HP, 50 HP & 60 HP

Components: Push Button, Emergency Stop button, Contactor, overload relay, add on block & terminal block.

Cable Entry Size: M20

Cable Entry Nos: 3 nos

Accessories: With or Without Cable Gland

For Regular and Clean Room Fittings

CERTIFICATES: BIS | CIMFR | PESO

STANDARDS: IS/lEC 60079-0:2017 | IS/lEC 60079-1:2014| IS/lEC 60019-31:2013

How It Works

The control station consists of push buttons (START/STOP), selector switches, overload relays, and contactors housed in a robust flameproof enclosure.

1. Electrical power enters the station through Ex d cable glands.
2. Pressing the START button energizes the contactor coil, closing the main contacts and supplying full voltage to the motor.
3. Pressing the STOP button de-energizes the contactor, opening the circuit and stopping the motor.
4. The overload relay protects the motor from overcurrent or short-circuits.
5. Any arcs, sparks, or electrical faults that occur inside the station are contained within the flameproof enclosure, and the flame paths cool escaping gases, preventing ignition of the surrounding atmosphere.

Some stations include indicator lamps to show motor running status or fault conditions.

Where Flameproof DOL Starter Control Stations Are Used

These control stations are used in hazardous locations where direct starting of motors is required in a safe manner.

Typical Industries

Oil and Gas plants, Petrochemical plants, Chemical processing units, Refineries, Fertilizer plants, Power generation stations, Paint and solvent handling areas, Mining operations, Pharmaceutical plants with solvent zones.