DOL Starter

DOL Starter is the most basic and simplest type of motor starter. DOL, also expanded to Direct-On-Line Starter, is the common way to start induction motors since they draw large amounts of current while starting. As a result, they require safeguards against high electricity inflow, voltage fluctuations, and sudden faults that may damage the motor windings. When the current supply is fired up, various components of the DOL starter take care of the smooth flow of current,detecting any anomalies in the electricity and breaking the circuits in case of any faults before it reaches the motor.

Due to its sensitive assembly, the DOL is the most reliable, easy-to-install, and time tested electrical tool that can be used in many motor control applications. It finds numerous applications in various industries, including agriculture and manufacturing.

BCH Direct-on-Line (DOL) Starters are highly reliable & time tested starters & suitable for wide range of agriculture & industrial applications. It offers complete motor protection against overload, single phasing, phase reversal & severe unbalanced voltages conditions, all in accordance with latest IS/IEC 60947-4-1 specifications.

How does a BCH DOL Starter operate?

A DOL Starter consists of two major components that control the current inflow.

1. Contactor: It is the first point of contact with the electricity. It's a control device that creates or breaks contact with the load. The electromagnet in the contactor is responsible for establishing the electrical connection when it is energized. Commonly,these contactors are designed to carry a higher current than the actual supply.
2. Overload Relay: It is a protection device and designed to protect the motor from overloads, short circuits, and other faults. It is a thermal device that monitors the current flowing through the circuit and trips if the current exceeds its rating. It also provides protection from phase loss, phase imbalance, phase reversal, and overheating. Overload relays are necessary for motors to operate normally and without the damages caused when the current exceeds their determined value.
3. The Push Buttons: There are two push buttons on the DOL Starter – NO (Normally Open) and NC (Normally Closed) buttons
   1. NO button is used to establish contact with the power and let the current flow through the contactor. It is normally turned off and makes no contact with the circuit. When pushed, it switches to ON, creating a contact in the electrical circuit.
   2. NC button is used to disconnect the electrical circuit and stop the flow of the current. It is usually in contact with the circuit, but when pushed, it disconnects from the circuit, breaking the electric flow.

The whole assembly is lined up in such a way as to facilitate the current through the circuit, monitor the flow and cut-off the circuit in case of abnormalities.

• When the NO button is pressed, it establishes the contact with the contactor. Once the load is transferred to the contactor, the electromagnets get energized, attracting the contacts and closing the circuit. Thus, power freely flows through the circuit and drives the motor.
• The auxiliary contacts control the overload relays and prevent the motor from overheating and overloading. When the current exceeds the set value, or in case of fluctuations or faults, the overload relay trips. As a result, auxiliary contact is made to open and de-energize the contactor.
• To stop the motor, the NC button is pressed which de-energises the electromagnet and opens the circuit in the contactor. Thus, disconnecting the motor from the power supply. The overload relay also trips, isolating the motor from the supply.

What makes BCH DOL starters more dependable?

BCH DOL Starters are one of the best in the industry given the hardware quality, vigorous quality checks, and wide range of applications. These are one of the most reliable devices to effectively operate motors at reasonable costs.

• Cost-effectiveness: The BCH DOL starter is an efficient and economical method to control motors due to its ease of installation, reasonable cost, and low maintenance as compared to other motor starters, making it a better option for those who are looking for cost savings.
• Reliability: The simple mechanism and high starting torque make it very reliable and effective in controlling motors. It starts quickly without any delays. The protection features allow the motor to run efficiently and without damage.
• Easy Installation: It is relatively simple to install and connect to the motor, needing minimal wiring. Thus, it is a preferred solution for those who have less time and skills.
• Low Maintenance: BCH DOL Starters are very durable and have minimal maintenance requirements.
  Multiple applications: BCH DOL starters can be used with many types of motors, thus increasing their range of applications.

BCH DOL Starters are an excellent and reliable choice for motor control applications where one can save on operating costs, save time, and provide protection to the motors with peace of mind due to their low maintenance requirements, multiple applications, and ease of use. These also enhance the performance and life of the motors, thus further contributing to cost savings.

Applications for BCH DOLStarters

The highly versatile nature of DOL starters make it a popular choice for a number of applications in industries and agriculture.

• Industries: DOL Starters are used to control small single phase or three-phase motors with low HP ratings that are used across industries. The motor is connected in series to the contactor of the DOL Starter. When the starter is switched On, the current flows into the circuit and starts the motor. These are used in running conveyor belts, compressors, fans and other machine tools. BCH DOL starters make it easy to control large electric motors used in the manufacturing and processing units.
• Agriculture: BCH Submersible Pump Starter is an effective device to control water pumps submerged in water bodies to draw out water for agriculture. This starter can help increase the efficiency of agricultural systems by providing a reliable and easy-to-use starting system for water pumps

DOL Starters

OLR Range (Amp)	DOL Range
	3-PH DOL Starters						3-PH Auto Start DOL		Mini Manual DOL		1-PH
	Shakti WP	Shakti	Citation (with NHD contactor)	Citation (with Citation Contactor)	Industrial DOL	OIL Immersed DOL Starter	2-Position	3-Position	1-PH	3-PH	DOL Starter
0.72 – 1.14
1.07 – 1.70
1.58 – 2.50
2.4 – 3.8
3.8 – 6.0
6.0 – 9.3
8.9 – 13.5
13.2 – 20.0
17.4 – 24.0
23.0 – 32.0
22.0 – 30.0
24.0 – 39.0
37.6 – 60.0

• Shakti WP DOL – with Shakti Contactor (20A) & “Citation WP” overload relay
• Shakti DOL – with Shakti Contactor (20A) & “Citation” overload relay
• Citation DOL (upto 25HP) – with NHD Contactor & “Citation” overload relay
• Citation DOL (30 & 40HP) – with Citation Contactor & “Citation” overload relay
• Industrial DOL – with Freedom Contactor & “Freedom” overload relay
• Oil Immersed DOL – with oil immersed Contactor & “Citation WP” overload relay
• Auto Start DOL – with Shakti Contactor (20A) & “Citation” overload relay
• Mini Manual DOL
• 1-PH DOL – with CPG Contactor & “Citation” 2Pole overload relay

Shakti WP DOL – with Shakti Contactor (20A) & “Citation WP” overload relay

Shakti DOL – with Shakti Contactor (20A) & “Citation” overload relay

Citation DOL (upto 25HP) – with NHD Contactor & “Citation” overload relay

Citation DOL (30 & 40HP) – with Citation Contactor & “Citation” overload relay

Industrial DOL – with Freedom Contactor & “Freedom” overload relay

Oil Immersed DOL – with oil immersed Contactor & “Citation WP” overload relay

Auto Start DOL – with Shakti Contactor (20A) & “Citation” overload relay

Mini Manual DOL

1-PH DOL – with CPG Contactor & “Citation” 2Pole overload relay

Submersible Pump Starters

OLR Range (Amp)	DOL Range
	3-PH Submersible Pump Starter						1-PH Submersible Pump Starter
	Shakti		Citation				with Mini Manual DOL Starter	with Ammeter version	with Ammeter + Voltmeter version
	2-Position (Auto / Manual)	3-Position (Auto / Manual / Manual SPP)	2-Position (Auto / Manual)		3-Position (Auto / Manual / Manual SPP)
			Economy	Premium (with MCB/MCCB)	Economy	Premium (with MCB/MCCB)
0.72 – 1.14
1.07 – 1.70
1.58 – 2.50
2.4 – 3.8
3.8 – 6.0
6.0 – 9.3
8.9 – 13.5
13.2 – 20.0
17.4 – 24.0
23.0 – 32.0

• 3-PH Submersible Pump Starter (Shakti) – with Shakti Contactor (20A) & “Citation” overload relay
• 3-PH Submersible Pump Starter (Citation) – with Citation Contactor & “Citation” overload relay
  •  Economy model
  •  Premium Model (having short circuit  protection through use of MCB/MCCB)
• 1-PH Submersible Pump Starter (with mini manual DOL) – with mini manual DOL Starter & separate Ammeter & Voltmeter
• 1-PH Submersible Pump Starter (Ammeter version)- with CPG Contactor & 2P Overload relay (with Ammeter)
• 1-PH Submersible Pump Starter (Ammeter & Voltmeter  version)- with CPG Contactor & 2P Overload relay (with Ammeter & Voltmeter)

3-PH Submersible Pump Starter (Shakti) – with Shakti Contactor (20A) & “Citation” overload relay

3-PH Submersible Pump Starter (Citation) – with Citation Contactor & “Citation” overload relay (Economy model)

3-PH Submersible Pump Starter (Citation) – with Citation Contactor & “Citation” overload relay(Premium Model)

1-PH Submersible Pump Starter (with mini manual DOL) – with mini manual DOL Starter & separate Ammeter & Voltmeter

1-PH Submersible Pump Starter (Ammeter version)- with CPG Contactor & 2P Overload relay (with Ammeter)

1-PH Submersible Pump Starter (Ammeter version)- with CPG Contactor & 2P Overload relay (with Ammeter & Voltmeter)