DOL Starter controling Diagram

Direct On Line Motor Starter includes tracking MCCB, Contactor and overload relay for protection. An electromagnetic contactor that can be turned on is a thermal overload relay under error conditions.The contactor controls with the start and stop buttons, and the contact assistant on the contactor is used, across the first button, as a holder for contact. i.e. the power connector is turned off while the engine is running. Usually up to 5HP induction motor we choose the first DOL method.

Direct On Line Starter (DOL) Terms of Service:

To start, the contactor is closed, using a full line voltage on the motor stator windings. The motor will pull the highest inrush current for a very short time, the magnetic field of the metal, and the current will be limited to the Locked Rotor Current of the motor. The motor will improve the Locked Rotor Torque and start accelerating towards full speed.

As the engine speeds up, the current will start to decrease, but it will not slow down until the engine is at full speed, usually 85% of the corresponding speed. The first real current curve is the car design function, as well as the terminal voltage, and is completely independent of the car load.

The load on the motor will affect the time taken for the engine to accelerate at full speed and therefore the maximum duration of the initial current, but not the maximum initial current.

As long as the torque generated by the engine exceeds the torque of the load at all speeds during the first cycle, the engine will reach full speed.

Advantages of DOL Starter: -

1. These are the simplest types to begin with.

2. The most economical and cheapest launcher.

3. Maintenance costs are very low.

Disadvantages of DOL Starter: -

1. It pulls the highest inrush current at the start which is 6-8 times the engine limit which limits its use to motors of only 7.5 KW.

2. It will apply high thermal stress to cars which will reduce the life of the vehicles.

3. The current High Starting will lead to a voltage drop.

Ferrite Bead

Our laptops are our daily resource, we can use them for over 6-7 hours but have you seen the little things waiting for us at the end of it.

They always looked like useless additions that never made sense to anyone but these little cylinders called Ferrite beads. These small letters are a reason to reduce distraction.

Any device that works with power transmission also selects power from other devices. So are our laptops with power switches on the switch that enable them to transmit radio waves. This process is called EMI (electromagnetic interference). This EMI leads to unavoidable power loss with the help of this tiny cylinder. Loss of power will obviously result in less charging of your laptops to reduce that and radio frequency noise can also be reduced.

Air Conditioners with Inverter technology

The latest and most effective technology available on the market today is Inverter Technology for air conditioners. Inverter technology is designed in such a way that it can save 30-50% of the electricity (units used) over normal air conditioning.

How does the air conditioner work?

The air conditioner during the cooling process, takes indoor air, cools it by passing it to the evaporator and then throws it back into our operating room with indoor air. Along with the evaporator air conditioner it also has a compressor that presses gas (refrigerator) to AC to cool itself and cool the incoming indoor air from the chamber.

In standard air conditioner:

The compressor is off or on. When turned on, it works at full capacity and consumes the full power it is designed to use. When the thermostat reaches a temperature set at AC, the compressor stops and the fan (to AC) continues to operate. When the thermostat senses that the temperature is rising, the compressor starts again.

On Air Conditioner with Inverter technology:

Inverter technology acts as an accelerator in the car. When a compressor needs more power, it gives you more power. When it needs less energy, it gives less energy. With this technology, the compressor remains open, but draws less energy or more power depending on the temperature of the incoming air and the level set by the thermostat. The speed and power of the compressor are adjusted accordingly. This technology was developed in Japan and used there successfully in air conditioners and refrigerators. This technology is currently only available on separate air conditioners.

What are the benefits of Inverter Technology?

All air conditioners are designed for high loading. So 1.5ton AC is designed for a specific room size and 1 ton for a different size. But not all rooms are the same size. A standard 1.5ton air conditioner will always operate at high power requirements when the compressor is operating. An air conditioner with inverter technology will work continuously but will only absorb most of the energy needed to maintain the desired temperature. It therefore automatically adjusts its volume according to the requirements of the cooling room. So draw very little power and use smaller power units.

Although airconditioner with Inverter Technology adjusts its volume based on the needs of the room, it is very important to install the right amount of air in the room. Please make sure you check the room and air conditioner capacity before purchase. Keep an eye out for this space as we are in the process of making a comparison of energy saving on different air conditioners.

Are Inverter technology air conditioners slow to cool?

In comparison, inverter tech AC changes the flow rate of the refrigerator based on room temperature. When the temperature is low, the flow rate is low, when the temperature is high, the flow rate is high. And it does not always turn off the compressor. It simply ensures that when the temperature setting is 25, it is maintained at that level.

So the difference is: the non-inverter AC will cool down, while the inverter AC will cool down much better. And thus one may feel that the AC inverter is neither cool nor fast.

The lesser-known benefits of Inverter Technology

Ordinary engines require 3-4 times more current (over current performance) in the beginning. Therefore the size of the inverter / generator required to use any AC or Refrigerator is greatly increased. But Inverter Technology air conditioners and refrigerators with flexible speed engines that start slowly require very little performance at first. Therefore the size of the inverter / generator needed to start is small. For example. A fixed speed of 1.5 ton AC operating at about 10 Amp current may require up to 30 Amp current when starting as well as a 5 kVA inverter / generator. But the inverter technology Air Conditioner requires about 6-7 Amp current and not too much at first and thus a 1.5 kVA or 2 kVA inverter / generator is good enough to support it.

Normal motors have a very low power factor. In commercial and industrial connectivity there is a low power factor charge and a high power factor discount. The inverter technology engine will have a power factor close to the unit (or 1) which not only results in less power consumption but also helps to get discounts on a better power factor.

If you plan to use Solar PV air conditioner, it is best to use inverter technology air conditioner or refrigerator as it not only reduces the size of the PV panel because it consumes less electricity, and reduces the size of the inverter to integrate the PV panel .