Ohm Engineering Works

26/09/2026

Quiz Time - Write your answers on comment section 👇
Like ❤️ comments ✍️ save 💡 share 💥

Follow Power DNA | Ohm Engineering Works

All Rights Reserved to Power DNA | Ohm Engineering Works

25/09/2026

𝐒𝐩𝐚𝐫𝐞 𝐏𝐚𝐫𝐭𝐬 𝐍𝐨𝐭 𝐌𝐚𝐭𝐜𝐡𝐢𝐧𝐠? 𝐘𝐨𝐮’𝐫𝐞 𝐑𝐢𝐬𝐤𝐢𝐧𝐠 𝐂𝐨𝐦𝐩𝐚𝐭𝐢𝐛𝐢𝐥𝐢𝐭𝐲

A replacement component may physically fit inside a panel and still be electrically or functionally incompatible. “It fits” is not the same as “it is suitable.”

⚠️ What Can Go Wrong?

- Incorrect voltage or current rating
- Wrong breaking capacity or short-circuit rating
- Mismatched trip characteristics or protection settings
- Incorrect coil/control voltage
- Different auxiliary contact configuration
- Improper coordination with upstream/downstream protection
- Compatibility issues with existing communication or control systems

🔎 What Should Be Verified?

- Manufacturer and exact part/model number
- Voltage, current and frequency ratings
- Breaking capacity and utilisation category where applicable
- Protection and trip characteristics
- Control/coil voltage
- Physical mounting and terminal arrangement
- Datasheet and manufacturer compatibility
- Existing panel drawings and protection settings

🛠️ Ohm Engineering Works Insight:
Spare selection should be based on technical equivalence—not appearance or availability. For critical equipment, verify the replacement against the original specification, system design and manufacturer documentation before installation.

⚡ Right part. Right rating. Right compatibility. Safer operation.

23/09/2026

  | MYTH vs FACT 54.



If there’s no tripping or breakdown, system is healthy.



Absence of tripping doesn’t mean all is well. It could mean faults are silently degrading insulation or cables, leading to catastrophic failures later. A power study uncovers these hidden stress points.

innovation sustainability productivity engineering linkedin ceig electrical renewables power electricalengineer powersystems transformers powertransmission analysis electricalsafety highvoltage ieee youngprofessionals NEC electricalengineers keeplearning karthikeyansj

21/09/2026

Cost Plus Contract: When You Should NOT Give a Fixed Price

What happens when the scope is unclear and the drawings keep changing?

Instead of guessing the final project cost, a Cost Plus contract can structure the uncertainty.

Actual Allowable Cost + Agreed Fee = Contractor Payment

But transparency is critical.

Keep proper:

✅ Purchase records

✅ Labour records

✅ Bills & invoices

✅ Client approvals

✅ Cost statements

Cost Plus reduces cost risk—but increases the need for financial discipline.

ElectricalContractor ProjectManagement ContractorBusiness

18/09/2026

YOUR HT POWER FACTOR IS 0.98…

BUT DO YOU KNOW YOUR HARMONIC CURRENT?

Your plant is running normally.

Voltage looks normal.

Power factor looks good.

Production is running.

So… is your electrical system actually healthy?

Not necessarily.

Modern industrial loads such as VFDs, UPS systems, rectifiers, battery chargers and SMPS loads can introduce harmonic currents into the electrical network.

And this creates an important question for every 11 kV / 22 kV / 33 kV HT consumer:

“If harmonic measurement happens at my PCC tomorrow, what will the meter show?”

A recent TNPDCL communication to HT consumers specifically highlights harmonic measurement, permissible limits, corrective action and compensation provisions.

So don't wait for the utility measurement to discover your numbers.

Before buying a harmonic filter, know these:

🔹 THDi

🔹 THDv

🔹 Individual harmonic orders

🔹 PCC values

🔹 Loading condition

🔹 Harmonic sources

🔹 Capacitor-bank interaction

🔹 System resonance risk

Measure → Analyse → Engineer → Correct → Verify

Because:

A harmonic filter is a solution.

A harmonic study tells you whether it is the right solution.

⚡ PowerDNA by Ohm Engineering Works

Power Quality & Harmonic Analysis | Electrical Consulting

📞 9600181272

📧 [email protected]

HT Consumer? Don't just ask, “Is my power factor good?”

Ask, “What is happening to my current waveform?”

THDv PowerSystem TNPDCL IndustrialElectrical ElectricalConsulting OhmEngineeringWorks PowerDNA

17/09/2026

𝐅𝐚𝐧𝐬 𝐀𝐥𝐰𝐚𝐲𝐬 𝐎𝐍 𝐢𝐧 𝐏𝐚𝐧𝐞𝐥? 𝐂𝐨𝐨𝐥𝐢𝐧𝐠 𝐈𝐬 𝐂𝐨𝐦𝐩𝐞𝐧𝐬𝐚𝐭𝐢𝐧𝐠 𝐚 𝐃𝐞𝐬𝐢𝐠𝐧 𝐅𝐥𝐚𝐰

A panel cooling fan running continuously is not automatically a design failure. But if the fan is being used constantly just to prevent overheating, the real heat source deserves investigation.

🔥 Why Does a Panel Need Continuous Cooling?

- High internal heat dissipation from breakers, contactors, VFDs or transformers
- High panel loading or poor load distribution
- Inadequate enclosure size or natural ventilation
- High ambient temperature
- Poor airflow or blocked ventilation paths
- Heat generated by harmonic-rich loads

⚠️ What Can Continuous Overheating Cause?

- Reduced equipment life
- Higher internal component temperatures
- Premature failure of electronic devices
- Increased energy consumption by cooling equipment
- More frequent maintenance and downtime

🔎 What Should Be Checked?

- Panel loading and current distribution
- Internal temperature and hotspot locations
- Heat dissipation of installed components
- Ambient temperature around the panel
- Ventilation and airflow path
- Harmonic levels where VFD/UPS/non-linear loads are present
- Enclosure sizing and cooling calculation

🛠️ Ohm Engineering Works Insight:
A fan should manage heat—not hide the reason for excessive heat. Before adding more cooling, identify the heat load, calculate the required heat dissipation and verify the panel's operating temperature.

⚡ Cooler panels are not always better-designed panels. Find the heat. Fix the cause.

16/09/2026

Item Rate Contract: Get Paid for What You Actually Execute

When project quantities can change, an Item Rate contract can protect the contractor better than a fixed-price model.

Payment = Actual Measured Quantity × Agreed Rate

But don't forget:

📌 Measurement records

📌 BOQ

📌 Variation approvals

📌 Escalation clauses

Your quantity may change. Your agreed rate may not.

16/09/2026

15/09/2026

𝐁𝐞𝐲𝐨𝐧𝐝 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 — 𝐁𝐮𝐢𝐥𝐝𝐢𝐧𝐠 𝐖𝐡𝐚𝐭 𝐋𝐚𝐬𝐭𝐬.

This Engineers’ Day, we celebrate the minds who turn challenges into solutions, ideas into infrastructure, and engineering into lasting impact.

At Ohm Engineering Works, we believe true engineering is more than designing electrical systems — it is about safety, reliability, efficiency and better decisions.

Engineering Electrical Systems.

Powering Better Decisions.

⚡ Happy Engineers’ Day 2026!

PowerSystems ElectricalDesign EngineeringLeadership

14/09/2026

🐘 WHEN THE BEGINNING MATTERS…

Choose the Right Connection. ⚡

This Vinayagar Chaturthi, let every new beginning be built on wisdom, safety and the right engineering.

At Ohm Engineering Works, we go beyond electrical ex*****on — from Electrical Design & Power System Studies to Power Quality, Statutory Liaisoning, Testing, Commissioning and Electrical Safety, we help you build with confidence.

Because a successful project doesn't begin with power.

It begins with the right engineering.

OHM ENGINEERING WORKS

Engineered Solutions for Electric Excellence

EngineeringExcellence NewBeginnings