Industrial Mentors

05/02/2026

30/08/2023

The transformer radiator's operation

Radiator function: A variety of cooling techniques are used to keep the Transformer at an appropriate operating temperature. One of these techniques is known as Oil Natural Air Natural where. The radiator's purpose is to quicken the Transformer's cooling process. It has a bottom header pipe oil outlet and a top header pipe oil intake part.

The typical transformer has an efficiency of about 99 percent, however there is a minor amount of inefficiency due to copper losses, core losses, hysteresis, and Eddy current losses. Heat is produced in the transformer's windings and core during operation because of the electric current flowing through the transformer's winding, which generates an alternating electromagnetic field inside the transformer. The losses experienced by the transformer are the result of this temperature rise.

Types and operation: Under loading situations, the transformer will get extremely heated. This heat must be decreased within a certain range to prevent overheating damage to the transformer.

In accordance with the physics of heat transfer, warm oil expands in volume and rises to the top of the main tank, where it enters the radiator through the top header pipe.

The process is known as Oil Natural Air Natural (ONAN). Once the heated oil has finally cooled by dissipating heat through the thin part of wall, the cold oil returns to the main tank through the bottom header pipe.

Oil Natural Air Forced Cooling (ONAF) is a technique that uses external fans to drive air into a big transformer to speed up the radiator's cooling operation.

29/08/2023

3phass Motor power connection control connection transformer contactor Overload

26/08/2023

A distributed control system (DCS) is a kind of control system used in industrial process control and automation that employs a network of independent controllers to carry out dispersed control operations throughout the system.

🔅 A variety of industrial operations, including manufacturing, electricity generation, and chemical processing, are monitored, managed, and controlled by the DCS.

Process control is a common use of DCS in the oil and gas, chemical production, power generating, and pharmaceutical industries, among others. In industrial plants, it offers real-time data acquisition, control, and optimisation of variables including temperature, pressure, flow rate, and level.

Supervisory control is made possible by DCS, which gives operators a centralised view of a whole plant or a group of plants. Operators may monitor the process via a graphical interface, receive alarms and alerts, and take the required steps to maintain efficient operations.

Safety is of the utmost significance in critical applications, where DCS is used. To monitor and manage safety-related operations, including emergency shutdowns, fire detection, gas leak detection, and process overpressure protection, it combines safety instrumented systems (SIS).

4 Batch Processing: DCS is essential in sectors including food and beverage, pharmaceuticals, and specialty chemicals that use batch processes. To ensure dependable and effective batch manufacturing, it enables the automation of recipe administration, batch scheduling, material monitoring, and quality control.

5 Asset Management: DCS has functions for asset management, including condition monitoring and predictive maintenance. It gathers and analyses data from a variety of sensors and devices to determine the condition of the equipment, spot anomalies, and schedule maintenance tasks, increasing plant reliability and decreasing downtime.

24/08/2023

Under normal operating circumstances, partial discharge (PD) analysis is a predictive test that detects insulation degradation before the system fails.

23/08/2023

: Mechanical devices that removes oxygen & Other dissolved gases from water.

🔷Purpose:
*Removal Non condensable gases (Corrosion)
*Act as a heat Exchanger.
*To provide Storage tank for BFW Pump.

🔷Working Principle:
Work as the gas Solubility in a solution decreases as the gas particle pressure a bove the Solution decreases.

22/08/2023

General guidelines for an oil refinery's commissioning process:

Pre-Commissioning Checks: Confirm that all construction tasks have been completed, carry out inspections, and check that all systems and components have been installed properly.

Commissioning of Mechanical Systems: Begin by commissioning operations involving mechanical systems, such as pumps, compressors, turbines, and heat exchangers. This includes assuring appropriate operation, alignment, lubrication, and functional testing.

Commissioning of Electrical Systems: Complete the commissioning of all electrical systems, including grounding, lighting, switchgear, and motor control centres. This entails turning on electrical apparatus, checking electrical connections, and guaranteeing that electrical systems are operating properly.

Focus on commissioning the instrumentation and control systems, such as field instruments, analyzers, and control loops. Distributed control systems (DCS) are also included in this category. Calibration of the instruments, loop checks, functional testing, and integration with the DCS are all part of this process.

Commissioning of utilities includes the commissioning of nitrogen, steam, water treatment, cooling water, and air systems. This entails evaluating and confirming the effectiveness of utility machinery like boilers, cooling towers, and water treatment systems.

Process Unit Commissioning: Next, commission each individual process unit, working your way up to more sophisticated ones as you go. This entails evaluating and confirming the effectiveness of unit processes such fractionation systems, reactors, separators, and distillation columns.

Commissioning of Systems With Multiple Units: Commission systems with multiple units, such as pipes between units, utility distribution, and product transfer systems. This entails checking the performance of connected systems and guaranteeing proper functioning.

Commissioning of Safety Systems: Install relief, fire and gas detection, emergency shutdown and other safety systems. Conduct thorough testing, safety function verification, and emergency reaction drills.

Performance Testing: work performance testing on the refinery as a whole or on individual units to see how well they work under various operating circumstances. Performance testing for processing feedstocks, product quality, capacity, energy efficiency, and emissions compliance may be part of this.

To ensure seamless operation and interaction amongst all systems, components, and processes, perform integrated system commissioning. This include evaluating and improving the refinery as a whole, resolving any interface problems, and making sure everything is running well.

21/08/2023

Protection for transformers:

Transformers are crucial parts of electrical power networks that employ electromagnetic induction to move electrical energy from one circuit to another. Transformers, however, are susceptible to several different defects, including overloading, short-circuiting, and insulation breakdown.

These flaws have the potential to seriously harm the transformer and perhaps result in the collapse of the entire electrical system. In order to guarantee the dependability and continuity of the electrical power supply, transformer protection is essential.

Transformer protection circuits are made to promptly identify and isolate transformer failures. A protective relay is a device that senses changes in electrical quantities like voltage, current, and frequency and can activate circuit breakers to isolate the transformer from the power supply in the event of a fault. These circuits frequently contain a number of protective relays.

Here are a few typical transformer protection circuit types:

1.Overcurrent Protection: Overcurrent protection relays detect when the transformer's current exceeds a predetermined limit. A short circuit or overload in the transformer may be to blame for this. Circuit breakers can be activated by overcurrent relays to disconnect the transformer from the power supply.

2.Differential Protection: If there is a difference between the currents coming into and going out of the transformer, differential protection relays compare the two currents and trip the circuit breaker. A failure in the transformer, such as a winding short circuit or a turn-to-turn fault, is indicated by this disparity in current.

3.Restricted Earth Fault Protection: This circuit checks the amount of current passing through the earthed neutral of the transformer and trips the circuit breaker if the current rises above a certain level. This can identify and pinpoint a problem with the insulation or windings of the transformer.

4.Overvoltage Protection: Overvoltage protection relays detect power system faults when the voltage across the transformer reaches a predetermined value. To disconnect the transformer from the power supply and safeguard it from harm, the relay can be used to operate a circuit breaker.

5.Transformers might also be equipped with additional safety features, such as Buchholz relays, which can spot problems with the transformer's oil-insulated winding, and temperature sensors, which track the temperature of the transformer and trip the circuit breaker if it rises above a safe level.

For electrical power systems to be dependable and safe, transformer protection is essential. Transformer protection circuits, including as overcurrent, differential, restricted earth fault, and overvoltage protection, are crucial in the detection and isolation of transformer problems.

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