Power Process
Electrical Engineering Technology

3ɸ Phase Induction motor Forward-Reverse direct on-line (DOL) connection.

Reverse Forward Circuit Diagram

Three-phase induction motor Reverse Forward Control Circuit and connection with demo running simulation testing. Reversing Starter is a special type of push-button starter, among which can be used to exchange the connectivity of any two terminals supplied to the director of the three-phase index motor rotating, along with the start/stop of the motor, two different contacts, one forward …

Three-phase induction motor Forward-Reverse direct on-line (DOL) connection.

 ➡ EKTS Software Download

How does a DOL Starter work?

The maximum form of motor starter for induction motors is directly on-line starter. Direct-on-line motor starter (DoL) consists of an MCCB or circuit breaker, connector and overload relay for protection. Electromagnetic contact which can be opened by thermal overload relay under fault conditions.

What is meant by DOL Starter? A direct line (DOL) or line starter across the motor terminal is applicable to full-line voltage, at the beginning or in cubic positions can be found typically an ELO drawing. It is the simplest type of motor starter. A DOL Motor Starter also has a safety device, and in some cases, monitoring the situation. What are DOL and RDL?


The DOL Starter motor comprises two contractors connecting the power supply. … the two contractors can be complementary to each other and the opposite of motor direction can be used. When the supply is directly connected to the motor, it is named after reverse DOOL starter. How does a star-delta motor starter work? The working principle of Star-Delta Starter This is the method of reducing voltage starting. … Star / Delta Starter is built from. Power Process Electrical Engineering Technology


Three-phase induction motor connection experiment

380V 5.5HP Y2 Series Three Phase Asynchronous Electric Motor

Experiment of Motor connection  

Motor Type:- 380V 5.5HP Y2 Series Three Phase Asynchronous Electric Motor

Basic Info      
Model NO. Y2-112M-2 4KW 5.5HP 2914RPM Number of Poles 2
Starting Mode y-δ Starting Certification ISO9001, CCC
Brand Tongbo Rated Frequency 50Hz, 60Hz
Rated Voltage 380V or Any Voltage Between 220V-760V Protection Class IP44, IP54, IP55
Cooling Method IC0141 Duty S1(Continuous)
Trademark TONGBO Transport Package Carton Box
Origin Fujian, China HS Code 8501520000



Rated Current calculation



 Reted Current   =6.233Amp





Molded Case Circuit Breaker (MCCB) Selection

Circuit Breaker Rated Current:-Multi 9 – N40N – MCB – 3P + N – 10 A – C Curve – 415 V – 10 kA

Molded Case Circuit Breaker (MCCB)

 Component type Miniature circuit breaker
range Multi 9
poles type 3 poles
Line Rated Current 10 A 122 °F (50 °C) EN/IEC 60947-2
Supply type AC
trip unit technology Thermal-magnetic
frequency 50/60 Hz
Operational voltage 415 V AC
local signalling ON/OFF indication
limitation class 3 EN/IEC 60947-2

Go to ➡ Circuit Breaker website


Magmatic contactor selectionMagmatic contactor selection

 Component type Contactor
NEMA size 00
Control circuit voltage 480 V AC
Auxiliary contact composition 1 NO + 1 NC
poles 3p
Line Rated Current 9 A
Operational voltage 600 V AC

Go to Magmatic contactor selection


Overload Relay selection

Overload Relay selection

Component type Non differential thermal overload relay
Relay application Motor protection
Thermal protection adjustment range 7…10 A
Rated insulation voltage Power circuit 600 V CSA
Frequency 0…..400Hz
Temperature compensation – 4….140 °F  (-20….60 °C)
Control type Red push-button stop – Blue push-button reset




Control circuit screw clamp terminals 2 0.00…0.00 in² (1…2.5 mm²) flexible without cable end
Control circuit screw clamp terminals 2 0.00…0.00 in² (1…2.5 mm²) flexible with the cable end
Control circuit screw clamp terminals 2 0.00…0.00 in² (1…2.5 mm²) solid without cable end
Power circuit screw clamp terminals 1 0.00…0.02 in² (1.5…10 mm²) flexible and without cable end
Power circuit screw clamp terminals 1 0.00…0.01 in² (1…4 mm²) flexible with the cable end
Power circuit screw clamp terminals 1 0.00…0.01 in² (1…6 mm²) solid without the cable end

Go to ➡ Overload Relay selection

Cable selection


DesignSpark Electrical Software Free Download

Designspark electrical free download

DesignSpark Electrical is an Electrical CAD tool that approves electrical designers and automation engineers to shortly and precisely graph and modify electrical systems.


Designspark electrical free downloadIt is accessible at no cost to download from Designspark and gives the capability to create synoptic/single line diagrams, schematics and 2D panel layouts with access to an indispensable parts library, live fee and availability data and the option to buy by using linking your Bill of Materials directly from the graph interface to the RS online website.

Software Install Process

First Download The software (EXE), Create a free account than This is online software. On the exe Click the mouse right button and run the

DesignSpark Electrical installer (EXE).

Step by step continue…….


The working life of electrical designers is filled with many challenges. RS Components, through their DesignSpark Programme, have researched and analyzed those challenges and are now providing a solution. Following the huge success of their free CAD solutions for PCB design and 3D solid modeling, this latest solution will support the design process for electrical engineers around the world. The barriers to the acquisition of electrical CAD have been removed giving access to fast and accurate design to every engineer.


During this session, attendees learned
  • The need for Electrical CAD
  • The reasons why many electrical designers do not have access to it
  • The unsuitable design solutions many engineers are forced to use
  • What RS are offering as a free powerful electrical CAD solution
  • The key features and benefits of this solution

About RS Components
RS Components and Allied Electronics are the buying and selling manufacturers of Electrocomponents plc, the world distributor for engineers. With operations in 32 countries, we provide more than 500,000 merchandise through the internet, catalogs and at trade counters to over one million customers, transport around 44,000 parcels a day. Our products, sourced from 2,500 main suppliers, include digital components, electrical, automation and control, and test and size equipment, and engineering equipment and consumables. Electrocomponents is listed on the London Stock Exchange
Information Collection now visits the internet site at www.rs-online.com.

About Trace Software
Trace software as an electrical software professional on account that 1987, offers effective software program options to calculate and design electrical and automation projects, below the philosophy of an easy-to-use person interface that improves customers’ engineering, bettering productiveness in a quick period of time. Among the most splendid industries are the usage of Trace Software solutions. We might also locate desktop and panel builders, preservation engineers or electrical designers.

Hydro Electric Power Plant

Hydro Electric Storage Reservoir


A hydro-electric plant consists of a reservoir for storage of water, a diversion dam, an intake structure for controlling and regulating the flow of water, a conduit system to carry the water from the intake to the water wheel, the turbines coupled with generators, the draft tube for conveying water from water wheel to the tailrace, the tailrace and a powerhouse 1.e. the building to contain the turbines, generators, the accessories and other miscellaneous items. The size, location, and type of each of these essential elements depend upon the topography and geological conditions and the amount of water to be used.


The height to which the dam may be built is usually limited by the extent of flowage damage. Pondage can also have a remarkable value, in particular for peak load energy plants, warranting the purchase of widespread flowage rights. The spillway section of the dam must be long enough to pass safely the maximum amount of water to be expected. Likewise, the abutments and other short structures must be built to withstand successfully the greatest freshet conceivable on the river


The components of the Hydro Power house.

  • Flowing streams
  • Water head 
  • Water holding capacity
  • Water pressure 
  • Catchment area
  • Spillway
  • Reservoir (water storage)
  • Dam
  • Penstock
  • Surge tank


Hydroelectric power plant equipment

  1. Water turban
  2. Alternator
  3. Generator
  4. Governor 
  5. Gate valve
  6. Relief Valve
  7. Air duct
  8. Flow measurement equipment
  9. Water circulating pump
  10. water circuit breaker
  11. Transformer
  12. Switch board equipment
  13. Reactor
  14. Low and high tension busbar
  15. Storage batteries
  16. Crane
  17. Outgoing connection
  18. Shops and offices 


 Storage Reservoir.

It is the basic requirement of a hydro-electric plant. Its purpose is to store water during excess flow periods (i.e. rainy season) and supply the same during lean flow periods (i.e. dry season) and thus it helps in supplying water to the turbines according to the load on the power plant. A reservoir can be either natural or artificial. A herbal reservoir is a lake in high mountains and an artificial reservoir is made by constructing a dam throughout the river. Low head plants require a very large storage reservoir. The capacity of the reservoir depends on the difference between run-offs during high and lean flows.


Hydro Power plant

The function of a dam is not only to raise the water surface of the stream to create an artificial head but also to provide the pondage, storage or the facility of diversion into conduits. A dam is the most expensive and important part of a hydro-project. Dams are built of concrete or stone masonary, earth or rock fill earth or rock fill. The type and arrangement depending upon the topography of the site. A masonary dam may be built in a narrow canyon. An earth dam may be best suited for a wide valley. The choice of the dam also depends upon the foundation conditions, local materials, and transportation available, the occurrence of earthquakes and other hazards.


Mansory dams are of three major classes viz solid gravity, buttress, and the arch dams.
Sold gravity dam shown in fig. 2.6 (a), is made of concrete and is suitable for most sites. The height of the dam, which cannot be very high, depends on the Arch dam, shown in fig. 2.6 (b) is a curved dam and transmits a major portion of its water pressure horizontally to the abutments by arch action. An arch dam is preferred where a narrow canyon width is available. This dam has inherent stability against sliding.


The buttress or deck dam has an inclined upstream face, so that water pressure creates a massive downward force that presents balance against overturning or sliding. Such a dam is more suitable for weak foundations and earthquake-prone sites. An earth dam has a very wide base as compared to its height. Such dams are quite suitable for a pervious foundation because the wide base provides a long seepage path. The earth dams have got the following advantages.

Microcontroller Application

Different Microcontroller Boards And Its Applications

A microcontroller improvement board is a printed circuit board (PCB) with circuitry and hardware designed to facilitate experimentation with a sure microcontroller board features. The Development boards are combined with a processor, memory, chipset and on-board peripherals like LCD, Keypad, USB, serial port, ADC, RTC, Motor Driver ICs, SD card slot, Ethernet, etc. with debugging features.



  • Microprocessor(4,8,16,32 BIT).
  • A little measure of RAM.
  • Programmable ROM and flash Memory.
  • Parallel and serial I/O.
  • Timers and signal generators.
  • Analog to Digital and Digital to Analog conversion

Microcontroller Application 

  • Supermarket: Cash Resister, Barcode Scanner, Weight Machine, Counting Machine
  • Home Appliance: Woven, Washing Machine, Refrigerator, Alarm Clock, Home Security Device, Fire Alarm System, Security Door System.
  • Entertainment : TV, Musical Instrument, CD/DVD Player,
  • Office Equipment: Printer, Photocopier, Scanner, Fax Machine, Lift, Money Counting Machine, Projector
  • Industry: Weight, Pressure, Temperature, Level, Flow, Vibration Measurement Device, VFD,VSD, Soft Starter, SCADA, Pump Controller, WTP etc.
  • Electrical Power System: AVR, Tap Changer Controller, ACR Controller, Battery Charger, Inverter, Transformer Protection System, Inverter, Smart Grid Device, Meters
  • Automotive: Close Loop Engine Control, Car Access System , Electrical System,
  • Medical Treatment Device.
  • Communication & Networking Device.
  • Robotics.
  • Automation.


  • Atmega32u4 microcontroller, which powers Arduino Mega and Leonardo
  • On-board polarized 2 JST battery
  • Simulation using Arduino IDE
  • 14 sewing tap pads for attachment and electrical connections

What is Microcontroller???

A microcontroller is a built-in circuit (IC) device used for controlling extraordinary components of a digital system, normally by using way of a microprocessor unit (MPU), memory, and some peripherals. These units are optimized for embedded purposes that require each processing functionality and agile, responsive interplay with digital, analog, or electromechanical components.

The most common way to refer to this category of built-in circuits is “microcontroller” however the abbreviation “MCU” is used interchangeably as it stands for “microcontroller unit”. You can also now and once more see “µC” (where the Greek letter mu replaces “micro”).


“Microcontroller” is a well-chosen identification due to the truth it emphasizes defining characteristics of this product category. The prefix “micro” implies smallness and the time length “controller” right here implies a greater appropriate ability to operate control functions. As cited above, this performance is the quit end result of combining a digital processor and digital memory with extra hardware that is specifically designed to aid the microcontroller to have interplay with extraordinary components.

The authentic processor used to put in force a microcontroller can range widely. For example, the cellphone cellular telephone confirmed on Inside a Digital Cell Phone contains a Z-80 processor. The Z-80 is an 8-bit microprocessor developed in the Nineteen Seventies and at the starting used in home computer systems of the time. The Garmin GPS tested in How GPS Receivers Work consists of a low-power model of the Intel 80386, I am told. The 80386 was once at the start used in laptop computers.


In many products, such as microwave ovens, the demand on the CPU is pretty low and the cost is an essential consideration. In these cases, producers turn to committed microcontroller chips — chips that had been initially designed to be low-cost, small, low-power, embedded CPUs. The Motorola 6811 and Intel 8051 are every ideal example of such chips. There is additionally a line of famous controllers acknowledged as “PIC microcontrollers” created with the resource of a commercial enterprise corporation referred to as Microchip. By present-day standards, these CPUs are quite minimalistic; but they are relatively more cost-effective when purchased in massive portions and can frequently meet the needs of a device’s clothier with truly one chip.

A typical low-end microcontroller chip may have 1,000 bytes of ROM and 20 bytes of RAM on the chip, alongside eight I/0 pins. In massive quantities, the price of these chips can from time to time be actually pennies. You actually are in no way going to run Microsoft Word on such a chip — Microsoft Word requires perchance 30 megabytes of RAM and a processor that can run heaps and thousands of tips per second. But then, you do now not want Microsoft Word to manipulate a microwave oven, either. With a microcontroller, you have one specific mission you are attempting to accomplish, and low-cost, low-power overall performance is what is important.


Classification According to Number of Bits:

1. 4BIT
2. 8BIT,
3. 16BIT
4. 32BIT





Classification According to Memory Devices:

1.Embedded memory microcontroller

2.External memory microcontroller


Classification According to Instruction Set

1.Complex Instruction  Set Computer(CISC)

2.Reduced Instruction Set Computer(RISC)






Classification According to Memory Architecture

1.Harvard memory architecture microcontroller

2.Princeton memory architecture microcontroller


What is PLC???

PLC Block diagram

PLC Application

What is PLC???

PLC full meanings is Programmable Logic Controller.

A Programming logic control is a solid-state control system that continuously monitors the status of devices connected as inputs. Based upon a user-written program, saved in memory, it controls the reputation of units linked as outputs.

PLC Classification by according to the Structure.
1. Integrated or Compact PLC
2. Modular PlC
PLC Classification by according to the Size and Capacity.
1. Small Size
2. Medium Size
3. Large Size


What is PLC Application???

Originally hardwired arrays relays were used to control the operation of heavy machines that contain motors and other high power devices.

PLCs was originally used to substitute the switching relay networks used in industrial application, but now they can also be used in implementing and other tasks such as timing, calculating, delaying counting, comparing and processing of the analog signals.



History Of PLC Innovation.

Richard E. Dick Morley

Richard E. “Dick” Morley


“The programmable controller was detailed on New Year’s Day, 1968.”



Richard E. “Dick” Morley

(December 1, 1932 – October 17, 2017)




Latching Function of PLC

PLC latching and multiple outputs

PLC Latching Function

There are frequently situations the place it is essential to preserve an output energized, even when the enter ceases.
A simple instance of such a scenario is a motor, which is started through urgent a push-button switch. Though the switch contacts do no longer continue to be closed, the motor is required to continue jogging till a quit push button change is pressed. The time period latch circuit is used for the circuit used to raise out such an operation. It is a self-maintaining circuit in that, after being energized, it maintains that state until every other input is received.

Latching Function
An instance of a latch circuit is proven in Figure 1.18. When the input A contacts close, there is an output. However, when there is an output, another set of contacts related with the output closes.
These contacts form an OR logic gate gadget with the enter contacts. Thus, even if the enter A opens, the circuit will still hold the output energized. The solely way to release the output is by means of running the usually closed contact B.


As an illustration of the application of a latching circuit, think about a motor controlled with the aid of end and start push button switches and for which one signal mild ought to be illuminated when the strength is applied to the motor and any other when it is no longer applied.
Figure 1.19 shows the ladder layout with Mitsubishi notation for the addresses

Note that the end contacts two X401 are proven as being programmed as open. two If the stop switch used is commonly closed then X401 receives a start-up sign to close. This offers a safer operation than programming X401 as typically closed.

X401 is closed when the application is started. When X400 is momentarily closed, Y430 is energized and its contacts close. This effects in latching and also the switching off of Y431 and the switching on of Y432.
To swap the motor off, X401 is pressed and opens. Y430 contacts are open in the top rung and the 0.33 rung however close in the 2nd rung. Thus Y431 comes on and Y432 off.
Latching is widely used with start-ups so that the initial switch-on of an utility will become latched on.

Top PLC Manufacturers Band World Wide.

Honeywell PLC United Stated

Top PLC Manufacturers Band

  • ABB PLC (Asea Brown Boveri), Switzerland, Automation Builder AC010, AC500
  • AB PLC (Allen Bradley), United State, RS Logix 5, RS Logix 500, RS Logix 5000
  • Mitsubishi PLC, Japan, Gx Developer, Gx Works 2
  • Delta PLC, Taiwan, WPL Soft, ISP Soft
  • Siemens PLC, Germany, Step 5- Micro wins, Step 7- Simatic Manager
  • Omron PLC, Japan, CX-One
  • Hitachi PLC, Japan EH-150
  • GE PLC (General Electric) United State, Durus
  • Honeywell PLC, United Stated, HRA
  • FATEK PLC, Taiwan, WinProladder
  • Schneider Electric PLC, Europe, Twidosuite
  • Bosch PLC, Germany, Bosch Rexroth


Embedded systems shaping the market for simplified cloud connectivity, improved security, real-time visualization, low power consumption, and deep-learning solutions

A programmable logic controller (PLC) is an automated system that collects data from various sensors and input devices that monitor temperature, pressure, storage levels, and so on. Using the program, PLC then processes this information, creates logic-based decisions, and sends output instructions to control the machine and process.

PLC is developing and running as the best option for various industrial automation applications. Features greater programming flexibility, ease of programming, scalability, memory, smaller sizes, very high speed (gigabit) Ethernet networking interfaces, and built-in wireless programmable logic controller.
Taw0001-01- Programmable-Logic-Controller

One of the PLC market driving factors is that there is no immediate replacement for automation. Another important thing is the Programmable Automation Controller (PACS), which integrates PLC with PCs. In addition, a modular PLC has the ability to continue working while other work modules are being modified. All of these factors help explain why the PLC market is still growing significantly.

As technological improvements and policies like the shrinking size of the circuit board begin to be equipped with more memory capacity and new communication features, it can create many ways to feature higher-level systems of smaller PLCs, resulting in new opportunities for this system.

So the big question is, what will be the major PLC trends in 2019? Below is a list of these trends, with suggestions that system developers, businesses, and industry giants can take full advantage of these ongoing developments.

Combine PLC and PAC

Many industry regulator suppliers make sense of the differences between PLCs and PACs, but future automation engineers may not focus on performance and available features when specifying their names. As the definition and characteristics of each have changed over the years, PLCs and PACs will continue to integrate each one.

During this evolution, there will be plenty of room in the market for low- and high-end processors. As hardware technology advances and over time, it is imperative that advanced features make their way into lower-end processors as well. As a result, suppliers will be pushing to include more features and options for their high-end products.

High-speed processors and more memory will open up wildfire for advanced features such as speed control, vision system integration and simultaneous support for multiple communication protocols while maintaining the simplicity of what makes the policy so attractive to many users.


Unified programming environment

The tendency of being integrated into a combination of PLC, speed control, and human-machine interface (HMI) programming will move forward in the next few years. In the same rack, the integration of PLC and HMI processor will probably follow the suite provided as part of the package with the monitor or as an external option. It does not matter if an HMI module is added to a similar processor or a PLC I / O rack, even as the current technology does not matter as a configuration.

Having a unified programming environment is ideal for most users unless it is overwhelming. The main benefits of marrying these packages are a diminishing learning curve and shorter overall development time. However, if the tool is not properly thought of, it can be difficult and uncomfortable to navigate.


Compact size, cost optimization processing time

Recent trends Small programmable logic controllers have been introduced in the Micro and Nano classes, which previously offer features available on large systems. This has led to the abandonment of large PLCs, even those in the nano class capable of Ethernet communication, speed control, auto-tuning in PID, remote connectivity and other features.

In response to market demand, many features and functions are now provided by low-end PLCs, and we can expect that smaller PLCs may include features associated with higher-level PLCs, while at the same time, small to meet the needs of middle level and high-end PLC users. , Will start to offer more compact and customized solutions.

PLCs are also absorbing recent developments related to reduced costs and the size of the memory chip. It allows multiple applications to use a PLC, which previously increases the local data storage required for expensive data acquisition systems. It also opens the door to other features

PLC Program idea of Beginners

PLC Program idea of Beginners

PLC Program working of idea 

We have two pumps that are used to transfer two separate fluids into this tank. Inside the tank, there are two levels of lower level lower level switches.

There is an electrically operated mixer inside the tank that starts working for a specific time, after mixing the tank, mixes two fluids.

At the bottom of the tank we have a discharge valve that controls the liquid drainage from the tank.

When the liquid layer moves towards the level of the switch’s position, the transmission of the 24-volt DC signal is stopped in PLC input.


PLC Program


We would like to write the program so that if the liquid level is reached the lowest, the pumps will be activated and the tank will begin to fill the tank.

Until reaching the high level switch level, the pump tank is filled up. When this happens, the open contacts in the switches will be closed and another 24-volt signal will be sent to PLC input which tells us the tank is full.

When this signal is sent, the pumps should first be closed so that no liquid tank is entered and the mixer should be launched.

We’d like to work Mixer for the seven-second mix of pumped fluid in the tank. After 7 seconds the mixer should close automatically and this discharge valve should be opened.


The liquid will be removed from the tank by opening the valve and will be transferred inside the factory during the process.
When the liquid level of the tank falls to the lowest set level of depression, the switch will start again and again it will stop again!

Three-phase Induction motor Direct On-line (DOL) Connection.

Three-phase Induction motor Direct Online DOL Connection

Three-phase motor Direct on-line (DOL) connection with Start Stop indicator lamp. EKTS software simulator. three-phase motor installation system and connection system demo or simulating knowledge about the simple connection with the 3phase supply. Electrical engineering technology all Students watching this video and practice now and get the variable ability.


Three Phase (3ɸ) induction connection equipment

Power Circuit

  • Three-phase supply
  • Molded Case Circuit Breaker (MCCB)
  • Magnetic contactor
  • Over Load Relay
  • Power cable

Control Circuit

  • Miniature Circuit Breaker (MCB)
  • Start Phase Batton (Red)
  • Stop Phase Batton (Green) 
  • On Indication Lamp (Red)
  • Off Indicator Lamp (Green)
  • Trip Indicator tamp (Yellow)
  • Control Cable
  • Ammeter
  • Voltmeter
  • Wate meter
  • Cooling fan

Panel Box fittings Equipment

  • Panel box
  • Grinding machine
  • Grinding cutting disk
  • Flotscro driver
  • Combination please
  • Nose please
  • Flotscro driver
  • Adjust range 
  • Cutting please
  • Hamer


3ɸ Phase Induction motor direct on-line (DOL) connection video tutorial

 ➡ EKTS Software Download

How to make a Direct On-line DOL Connection???

Starter, direct online starter, motor wire, how a contractor and overload cable – direct online starter, how to test a dolor starter, learn the door starter, direct online starter
Dull starter work animation, electric
A DOL Starter is a Direct On-Line Motor Starter. Sometimes known as the ‘overlapping’ starter, this type of motor controller is used as a simple starter for motor electric motors, which provides full line voltage to the motor terminal.

Why do we use Dol Starter?

Due to the high initial current flow, we employ different kinds of early workers to prevent damage to the winding. The maximum form of motor starter for induction motors is directly on-line starter. The DOL Starter consists of an MCCB or circuit breaker, contact load and an overload relay for protection.

What is a DOL starter???
2 – Theory Full line voltage is applied to a motor terminal across a straight-line (DOL) or line starter. It is the simplest type of motor starter. A DOL Motor Starter also has the protection device and, in some cases, monitoring the situation

➡ What is DOL Starter and Star-Delta???

Direct online (dol) start The DOL startup is switching the motor into operation with only direct connections from the source. This is usually used for small loads because at the beginning the current running current of the current can be up to 10 times the normal running.

How many initials are there???

Initially, two main types of manual starter and AC magnetic motor starter, commonly known as motor starter. Manual Starter is manually operated.

What is the purpose of DOL Starter???

A direct line (DOL) or line starter across the motor terminal is applicable to full-line voltage, at the beginning or in cubic positions can be found typically an ELO drawing. It is the simplest type of motor starter. A DOL Motor Starter also has a safety device, and in some cases, monitoring the situation.

A direct line (DOL) or line starter across the motor terminal is applicable to full-line voltage, at the beginning or in cubic positions can be found typically an ELO drawing. It is the simplest type of motor starter. A DOL Motor Starter also has a safety device, and in some cases, monitoring the situation.

  • Where is Star-Delta Starter used?
  • How does a DOL Starter work?
  • What does the star Delta Starter mean?
  • How does an auto transformer starter work?

Where is Star-Delta Starter used?

Induction motors of a cavity cord, the starter is used only to reduce the input voltage on the motor so that the current is reduced. It starts with the TPPDT switch initially connected to the sun in the motor and then starts the motor and then switches to the Delta connection in the running position.

  • What is the difference between the Star and Delta connection?
  • What is the benefit of a Star-Delta Starter?
  • Why is the small motor star attached?
  • Why is a three-phase induction motor auto launching?

What is the column starter?

What is the difference between the Star and Delta connection?
The phase voltage is lower than the line voltage in the stage connection, so the motor or the drives connected to the connection are running slowly compared to the Delta connection. The storage connection is better in the transmission system because the insulation of voltage is less needed. The Delta connection distribution system is used.

How does a 3 phase induction motor start?

What is a Dell Starter used for?

Why is there a high starting current of induction motors?

What is the overload relay?

Electrical Engineering Technology