EASUN REYROLLE Repair Services India
EASUN REYROLLE is a leading Indian manufacturer of power electronics, automatic voltage regulators (AVR), and industrial control systems headquartered in Bangalore. With over six decades of expertise, EASUN REYROLLE designs ruggedized equipment for harsh industrial environments across mining, power generation, steel, and heavy manufacturing. Their products are trusted across Indian industries for stability, efficiency, and durability in critical power applications.
EASUN REYROLLE is a leading Indian manufacturer of power electronics, automatic voltage regulators (AVR), and industrial control systems headquartered in Bangalore. With over six decades of expertise, EASUN REYROLLE designs ruggedized equipment for harsh industrial environments across mining, power generation, steel, and heavy manufacturing. Their products are trusted across Indian industries for stability, efficiency, and durability in critical power applications.
Synchronics Electronics specializes in repairing the full EASUN REYROLLE product portfolio — including AVR modules, synchronous condensers, excitation systems, industrial rectifiers, and control panels. With 180+ engineers in Vadodara, we have hands-on experience with EASUN REYROLLE's analog and digital regulators, fault detection boards, and power conditioning units. Our technicians understand EASUN REYROLLE's design architecture and can diagnose complex intermittent faults that others miss.
Expert repairs for EASUN REYROLLE AVR, excitation, and power control systems across India.
EASUN REYROLLE Equipment We Repair — By Category
EASUN REYROLLE Product Lines We Repair
Our engineers are trained on the full EASUN REYROLLE product range. Below are the major product families we service.
Automatic Voltage Regulator (AVR) Systems
EASUN REYROLLE's core AVR range provides stable voltage output for alternators and generators in thermal power plants, hydroelectric stations, and industrial captive power. Common faults include sensor drift, amplifier module failure, thyristor firing circuit malfunction, and reference voltage instability causing voltage hunting and oscillation.
Excitation Systems for Synchronous Machines
Brushless and brush-type excitation systems for large synchronous motors and generators in power plants and industrial applications. These systems regulate field current, provide transient stability, and prevent pole slip. Repairs address rectifier bridge failures, field winding shorts, and control signal loss issues.
Digital Control and Protection Modules
EASUN REYROLLE microprocessor-based controllers and protective relays for generator protection, load control, and synchronization. These include loss-of-excitation protection, over/under frequency detection, and synchronizing logic. Common failures: CPU module burnout, analog input card faults, relay contact wear, and communication port degradation.
Industrial Rectifier Units
Three-phase and single-phase rectifier units for DC power supply in HVDC systems, battery charging, and DC motor control. EASUN REYROLLE rectifiers handle high fault current transients. Typical issues include thyristor gate-drive failures, transformer winding insulation breakdown, and cooling fan malfunctions in harsh industrial environments.
Voltage Regulation and Power Conditioning
Static and dynamic voltage stabilizers, harmonic filters, and power factor correction systems for industrial plants susceptible to voltage sag and supply distortion. These protect sensitive motors, pumps, and compressors. Faults: capacitor bank failures, filter inductor core saturation, SCR stack thermal runaway, and protection circuit misfires.
Field Winding and Rotor Components
EASUN REYROLLE supplies field coils, slip rings, and rotor assemblies for generators and synchronous motors used in Indian sugar mills, textile, and power plants. Repair services include winding insulation testing, slip ring resurfacing, and rotor balancing after bearing or magnetic pull damage.
Why Choose Synchronics for EASUN REYROLLE 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 EASUN REYROLLE 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 EASUN REYROLLE Equipment Faults We Fix
Based on 30+ years of repair data, these are the most frequent failure modes we see in EASUN REYROLLE equipment arriving at our workshop.
- ✓AVR voltage oscillation and hunting — In EASUN REYROLLE SR4-SR7 series, hunting is caused by amplifier gain drift, sensor potentiometer wear, or unstable reference voltage supply. Thermal cycling and humidity in Indian power stations degrade the precision feedback network.
- ✓Thyristor gate-drive circuit failure — EASUN REYROLLE excitation and rectifier units use SCR/triac gate drivers sensitive to voltage spikes and poor cooling. Gate transformer saturation and driver IC burnout are common in dusty mill environments with irregular power supply.
- ✓Microprocessor controller memory corruption — EASUN REYROLLE MK3/MK4 and DG1/DG2 modules suffer EEPROM corruption due to power interruptions, brownouts, and EMI from nearby VFDs and power electronics in Indian industrial plants. Checksum errors disable protection functions.
- ✓Loss of field detection malfunction — EASUN REYROLLE protective modules may fail to detect loss of rotor field in synchronous generators, risking pole slip. This occurs when ac feedback transformer is open, analog comparator is offset, or signal conditioning circuit drifts.
- ✓Slip ring and brush assembly deterioration — EASUN REYROLLE brush-type excitation systems and rotating field windings suffer from slip ring scoring, brush dust buildup, and poor contact pressure in Indian industrial environments with high ambient temperature and humidity. This causes intermittent field current loss.
- ✓Power supply and transformer overheating — EASUN REYROLLE control and excitation module power supplies are stressed by voltage fluctuation, overload, and inadequate ventilation in confined panel spaces typical of older Indian power plants. Transformer insulation degrades and secondary capacitors fail, reducing available gate current and logic power.
How We Repair Your EASUN REYROLLE 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 EASUN REYROLLE Equipment
We serve plant maintenance teams across all major industries where EASUN REYROLLE automation is deployed.
Frequently Asked Questions — EASUN REYROLLE Repairs
Do you repair EASUN REYROLLE equipment anywhere in India?+
Yes. Synchronics repairs the full EASUN REYROLLE product range — AVRs, excitation systems, digital controllers, rectifiers, slip rings, and field windings. We offer PAN India door pickup from Mumbai, Delhi, Pune, Chennai, Hyderabad, Ahmedabad, Kolkata, and all other cities. All repairs are done at our Vadodara, Gujarat facility with 180+ engineers and full testing equipment.
How do you test EASUN REYROLLE AVR modules after repair?+
Synchronics uses a dedicated 50 kW AC generator and digital load controller to test EASUN REYROLLE AVR units under real load conditions. We verify voltage regulation accuracy across 0-100% load, measure voltage oscillation damping, test transient response to sudden load steps, and confirm protection outputs. Full test reports with load curves are provided with every AVR return.
What happens if EASUN REYROLLE excitation field current is intermittent?+
Intermittent field current in EASUN REYROLLE generators usually indicates slip ring wear, brush contamination, or loose terminal connections in the excitation panel. Synchronics performs rotor removal, visual slip ring inspection, resurfacing to correct runout, brush replacement with manufacturer-specified grades, and megger testing of field winding insulation. This prevents loss of synchronism and potential blackout.
Can you supply EASUN REYROLLE spare parts or only repair?+
Synchronics primarily repairs and refurbishes EASUN REYROLLE modules and assemblies. For obsolete or non-repairable units, we can assist with compatible replacement sourcing from authorized EASUN REYROLLE distributors in India. We also repair and recondition field windings, rotors, and slip rings to like-new specifications — often more cost-effective than new equipment.
How long does EASUN REYROLLE protective relay repair typically take?+
EASUN REYROLLE MK3, MK4, and DG series protective relays usually require 7-10 days at Synchronics. This includes module disassembly, component-level fault diagnosis, firmware restoration or IC replacement, software re-commissioning with test signals, and full functional verification of all protection channels (LOF, under-frequency, synchronizing logic). We provide daily status updates for critical power plant shutdowns.
How do I send my EASUN REYROLLE 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 EASUN REYROLLE 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 EASUN REYROLLE 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 EASUN REYROLLE 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.
EASUN REYROLLE Repair Catalog
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Send us your faulty industrial electronics. Our engineers will diagnose it and provide a detailed quote within 24 hours — with no obligation to proceed.
Free Evaluation
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48hr Turnaround
Fastest in India
6-Month Warranty
Every repair
No Fix, No Charge
Zero risk policy
Pan-India Pickup
Doorstep service