CLARKE-HESS Repair Services India
Clarke-Hess Electric Corporation, established in 1896, is a renowned American manufacturer specializing in high-precision transformers, voltage regulators, and electrical distribution equipment. Known for robust engineering and reliability in demanding industrial environments, Clarke-Hess serves power utilities, manufacturing plants, and critical infrastructure across North America and internationally. Their products are engineered for long-life operation in harsh conditions, making them a trusted choice for Indian power and industrial sectors.
Clarke-Hess Electric Corporation, established in 1896, is a renowned American manufacturer specializing in high-precision transformers, voltage regulators, and electrical distribution equipment. Known for robust engineering and reliability in demanding industrial environments, Clarke-Hess serves power utilities, manufacturing plants, and critical infrastructure across North America and internationally. Their products are engineered for long-life operation in harsh conditions, making them a trusted choice for Indian power and industrial sectors.
Synchronics Electronics has extensive expertise repairing Clarke-Hess voltage regulators, distribution transformers, and control transformers across Indian industries. Our 180+ engineers understand Clarke-Hess transformer design, tap-changer mechanisms, cooling systems, and electrical protection circuits. We provide fast turnaround diagnostics, component-level repairs, and full system restoration—ensuring your Clarke-Hess equipment returns to service with original performance specifications and extended operational life.
Expert Clarke-Hess transformer and voltage regulator repair across India.
CLARKE-HESS Equipment We Repair — By Category
CLARKE-HESS Product Lines We Repair
Our engineers are trained on the full CLARKE-HESS product range. Below are the major product families we service.
Voltage Regulators (AVR)
Clarke-Hess automatic voltage regulators maintain stable output voltage under varying load conditions. Common issues include tap-changer contact wear, servo motor failure, and sensing circuit drift. Synchronics restores regulator accuracy and response time to factory specifications.
Distribution Transformers
Heavy-duty transformers for industrial distribution networks. Faults include winding insulation breakdown, core lamination separation, and overheating due to cooling system failure. Synchronics performs winding resistance testing, insulation diagnostics, and thermal imaging analysis.
Control Transformers
Low-voltage transformers for control circuits and instrumentation. Typical failures include primary/secondary winding shorts, terminal box corrosion, and dielectric fluid degradation. Synchronics replaces windings, refurbishes cores, and recertifies per IEC standards.
Isolation Transformers
Specialized transformers for noise filtering and ground separation in sensitive equipment. Common problems include delta-wye connection faults, copper oxidation, and phasing errors after field rewiring. Synchronics verifies polarity and phase relationships before return.
Rectifier Transformers
Heavy-current transformers for DC power supplies and electroplating systems. Failures stem from harmonic heating, secondary winding fatigue, and ferromagnetic resonance. Synchronics performs thermal stress analysis and reinforces windings for high-ripple currents.
Why Choose Synchronics for CLARKE-HESS Repairs?
PCB-Level Expertise
We repair down to the component level — not just swap boards. Our engineers identify root causes, replace failed IGBTs, capacitors, processors, and gate drivers on CLARKE-HESS equipment.
Fast Turnaround
Standard 7–10 working days. Express 3–5 days available for critical breakdowns. Emergency same-day/next-day service for unplanned downtime.
6-Month Warranty
Every repaired unit ships with a 6-month comprehensive warranty on parts and labour. Our repair success rate is over 94% across all brands.
All-India Service
Couriered repairs accepted from any city in India. Doorstep pickup available in Vadodara, Mumbai, Pune, Ahmedabad, Surat, Chennai, and more.
Common CLARKE-HESS Equipment Faults We Fix
Based on 30+ years of repair data, these are the most frequent failure modes we see in CLARKE-HESS equipment arriving at our workshop.
- ✓Tap changer contact oxidation and poor switching — Clarke-Hess tap changers are exposed to arcing and moisture ingress over years of operation. Contact surface oxidation increases contact resistance, causing voltage regulation failures and erratic step changes.
- ✓Winding insulation breakdown and phase-to-ground faults — Clarke-Hess transformers in humid Indian environments experience insulation paper degradation and moisture absorption. Thermal cycling and voltage transients accelerate insulation failure, leading to dielectric breakdown and short circuits.
- ✓Voltage regulation droop and unstable output — Clarke-Hess AVR servo motors lose magnetic field strength or develop brushes wear. Sensing transformer accuracy drifts due to core aging. These faults cause regulation error exceeding +/- 2% specification.
- ✓Core lamination separation and increased iron loss — Clarke-Hess transformer cores delaminate due to thermal cycling stress, corrosion between laminations, or impact damage during transport. Separation increases eddy current losses and core heating, reducing efficiency.
- ✓Oil seepage and fluid level drop — Gasket deterioration in Clarke-Hess transformer oil tanks allows slow leakage. Thermal cycling weakens seal integrity. Oil oxidation also reduces fluid volume as sludge forms.
- ✓Cooling fan and pump motor failure — Clarke-Hess forced-oil-cooled transformers rely on electric motors for circulation. Motor winding shorts, bearing seizure, or capacitor failures disable cooling during peak load, risking thermal runaway.
How We Repair Your CLARKE-HESS Unit
Receive & Log
Your unit is logged into our tracking system with a unique job number. You receive WhatsApp / email updates at every stage.
Fault Diagnosis
Board-level diagnosis using oscilloscopes, LCR meters, and thermal cameras. Root cause identified before any repair begins.
Component Repair
Faulty ICs, capacitors, MOSFETs, IGBTs, and gate drivers replaced with genuine or equivalent-spec components.
Full-Load Test
Unit tested under rated load with original or equivalent motor. All parameters verified. 6-month warranty issued.
Industries Using CLARKE-HESS Equipment
We serve plant maintenance teams across all major industries where CLARKE-HESS automation is deployed.
Frequently Asked Questions — CLARKE-HESS Repairs
Do you repair Clarke-Hess equipment anywhere in India?+
Yes. Synchronics repairs the full Clarke-Hess product range including voltage regulators, distribution transformers, isolation transformers, and rectifier transformers. We offer PAN India door-to-door pickup and delivery from Mumbai, Delhi, Pune, Chennai, Hyderabad, Ahmedabad, Kolkata, and all other major cities. All work is performed in our fully equipped Vadodara, Gujarat facility with test power supplies, megohm meters, and precision diagnostic equipment.
What testing does Synchronics perform on repaired Clarke-Hess transformers?+
Synchronics performs comprehensive validation including turns ratio measurement, winding resistance testing, insulation resistance (megohm) testing at 5 kV, tan-delta (loss angle) measurement to detect moisture in insulation, oil dielectric strength testing, short-circuit impedance verification, and no-load loss testing. Final stage is temperature-rise testing under rated load to confirm thermal performance meets Clarke-Hess original specifications.
Can Synchronics repair Clarke-Hess tap changer problems without replacing the entire transformer?+
Yes. Synchronics specializes in isolated tap-changer rebuilds. We disassemble the mechanism, inspect contact wear, replace spring assemblies and resistance grids if needed, clean and re-plate contacts, and test through multiple load-tap-change cycles to verify smooth operation. This modular approach costs significantly less than full transformer replacement while restoring voltage regulation accuracy.
How long does Clarke-Hess transformer repair typically take?+
Standard repairs (gasket replacement, oil fill, fan motor testing) take 5-7 working days. Winding rewinds and core work require 10-15 working days. Emergency expedited repairs are available. We provide daily progress updates and can arrange loaner equipment if downtime is critical for your plant operations in India.
Does Synchronics provide on-site support for Clarke-Hess equipment commissioning?+
Yes. Synchronics field engineers provide on-site installation, commissioning, and load testing of repaired Clarke-Hess transformers at your facility. We verify phasing, measure voltage regulation under live load, calibrate automatic voltage regulator setpoints, and train your team on monitoring and maintenance. We travel across India for critical installations.
How do I send my CLARKE-HESS unit for repair?+
Pack the unit securely and courier it to our Vadodara workshop. Include a note with the fault description and your contact details. We will log it into our system and WhatsApp you a job number within 24 hours of receipt. Doorstep pickup is available in Vadodara, Ahmedabad, Surat, Mumbai, and Pune.
What is the cost of repairing a CLARKE-HESS drive or PLC?+
Repair cost depends on the model and the fault. We offer a free diagnosis — once we identify the fault, we provide a fixed quotation before proceeding. Typical repairs cost 20–40% of the new unit price. We will never repair without your approval.
What warranty do you provide on CLARKE-HESS repairs?+
All repaired units carry a 6-month comprehensive warranty covering the same fault and related issues. If the fault recurs within the warranty period, we repair it free of cost.
Do you provide a no-fix, no-fee guarantee?+
Yes. If we cannot repair your CLARKE-HESS unit after diagnosis, you pay only the diagnosis fee (₹500–₹1,500 depending on the product). The unit is returned to you at no additional charge.
CLARKE-HESS Repair Catalog
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