Enclosed direct-on-line (DOL) starter with contactor, thermal overload relay and integrated pushbutton station, ready to install. Quoted according to motor power and voltage.
Tell us the reference or key specification (current, power, gauge, size), quantity and city — a technical advisor sends your quote the same business day.
A direct-on-line (DOL) starter applies full voltage to the motor through a contactor and overload relay in an enclosure with pushbuttons, per IEC 60947-4-1. On starting, the motor draws 6 to 8 times its rated current, so DOL is used where the supply and the driven machine tolerate that inrush.
The enclosed direct-on-line starter, also called DOL, brings together in one enclosure the basic elements for starting and protecting a motor: contactor, thermal overload relay and control pushbuttons. At TECTUL it is quoted by motor power, motor voltage, rated current, enclosure type and installation conditions. The actual lot data confirms a ready-to-install solution with contactor, thermal overload relay and integrated pushbutton station. It differs from a three-pole contactor because it is not only the switching component; it is an assembled set for local motor control. It also differs from a soft starter because it applies direct voltage to the motor, without an electronic acceleration ramp. IEC 60947-4-1 is a reference for motor starters, while machine wiring should consider IEC 60204-1 criteria.
We dispatch enclosed direct-on-line starters to Bogotá, Medellín, Cali, Barranquilla and all of Colombia. Request a quote via WhatsApp with the motor nameplate and installation environment.
| Power | 220–230 V | 440–460 V |
|---|---|---|
| 1 HP | 4.2 A | 2.1 A |
| 5 HP | 15.2 A | 7.6 A |
| 10 HP | 28 A | 14 A |
| 25 HP | 68 A | 34 A |
| 50 HP | 130 A | 65 A |
Values from table 430-150 of NTC 2050 (Colombian Electrical Code; equivalent to NEC Table 430.250) for squirrel-cage induction motors. These values size the contactor, overload relay and conductors of the starter.
It depends on power, voltage, current, enclosure type and control accessories. TECTUL quotes via WhatsApp with the motor nameplate.
The direct-on-line starter energizes the motor directly. The soft starter uses electronics to reduce starting and stopping stress.
The enclosure is fixed, supply, motor output and grounding are connected, and the thermal overload relay is adjusted. The supplied equipment diagram must be followed.
According to the actual lot data, it includes contactor, thermal overload relay and integrated pushbutton station. Additional accessories are confirmed when quoting.
Yes, provided the motor accepts direct-on-line starting and the network supports starting current. Power, voltage and application must be validated.
When starting current or mechanical shock affects the network, pump, transmission or process. In those cases a soft starter or VFD is evaluated.
14 A at full load per table 430-150 of NTC 2050; on direct-on-line starting the inrush reaches 84–112 A (6 to 8 times rated) during acceleration.
There is no fixed HP limit: the criterion is whether the supply and the load tolerate the 6-to-8-times inrush. When voltage dip or mechanical shock is unacceptable, move to a soft starter or a VFD.
Updated: July 22, 2026
