ALSTHOM Repair Services India
Alstom (formerly ALSTHOM) is a global leader in railway transport, power generation, and grid infrastructure. Founded in France in 1928, Alstom manufactures high-reliability traction motors, power converters, signalling systems, and electrification equipment for rail networks and industrial applications. The company maintains a significant presence in India through railway electrification projects, metro systems, and industrial motor applications across major infrastructure sectors.
Alstom (formerly ALSTHOM) is a global leader in railway transport, power generation, and grid infrastructure. Founded in France in 1928, Alstom manufactures high-reliability traction motors, power converters, signalling systems, and electrification equipment for rail networks and industrial applications. The company maintains a significant presence in India through railway electrification projects, metro systems, and industrial motor applications across major infrastructure sectors.
Synchronics Electronics specializes in repairing Alstom's critical industrial equipment, including traction drive systems, propulsion converters, signalling modules, and auxiliary power units. With 180+ engineers and two decades of experience, we service 7 Alstom product families used in Indian Railways, metro networks, and industrial power applications. Our Vadodara facility houses test benches calibrated for Alstom's precision standards, ensuring equipment reliability on critical railway and industrial networks.
Deep expertise in Alstom traction systems, signalling electronics, and railway power distribution repair.
ALSTHOM Equipment We Repair — By Category
ALSTHOM Product Lines We Repair
Our engineers are trained on the full ALSTHOM product range. Below are the major product families we service.
Alstom Traction Inverters (MITRAC)
High-power semiconductors and inverters used in electric train propulsion. Common faults include IGBT module failures, capacitor degradation, and gate drive circuit breakdowns affecting train acceleration and speed control.
Alstom Signalling Systems (SMARTLOCK, CBTC)
Communication-based train control and interlocking modules for metro and main line railways. Failures include communication protocol errors, processor crashes, and relay logic faults affecting train safety systems.
Alstom Propulsion Control Units (PCU)
Onboard power management and control electronics for electric and hybrid trains. Common issues include firmware corruption, CAN bus communication loss, and power distribution relay failures.
Alstom Pantograph Control Electronics
Overhead contact system (OCS) interaction control boards for electric trains. Faults include sensor signal loss, solenoid driver failures, and voltage regulation circuit breakdowns.
Alstom Gate Drive Boards (GDB)
IGBT gate drive and PWM generation circuits for power converters. Failures include optocoupler burnout, timing circuit drift, and short-circuit protection relay malfunctions.
Alstom Rectifier and Charging Modules
DC bus rectification and onboard charger control boards for battery-electric trains and metro systems. Common faults include diode failures, transformer saturation, and output voltage regulation loss.
Why Choose Synchronics for ALSTHOM 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 ALSTHOM 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 ALSTHOM Equipment Faults We Fix
Based on 30+ years of repair data, these are the most frequent failure modes we see in ALSTHOM equipment arriving at our workshop.
- ✓IGBT module thermal runaway and gate short circuit — Alstom MITRAC inverters experience IGBT junction temperature overshoot due to inadequate heatsink cooling, moisture ingress in baseplate solder joints, or parasitic inductance causing voltage overspill. Gate drive isolation layer breakdown under high dV/dt transients is common in high-speed train propulsion cycles.
- ✓CAN bus communication timeouts and node lockup — Alstom SMARTLOCK and PCU modules experience CAN transceiver isolation loss or microcontroller firmware hangs during high-frequency message bursts on metro train networks. Improper termination resistors and ground plane discontinuities aggravate protocol stack failures.
- ✓Capacitor dry-out and electrolyte leakage in inverter DC buses — Alstom MITRAC and PCU units deployed in high-ambient Indian railway environments experience electrolytic capacitor aging at 80-100 deg C. Ripple current stress and voltage transients during regenerative braking cycles accelerate dielectric breakdown and ESR rise.
- ✓Pantograph contact loss and solenoid driver failures — Alstom OCS controller solenoid drivers fail due to back-EMF voltage spikes during pantograph separation on overhead lines. Diode clamping circuit degradation and gate driver over-current shutdown are typical failure modes in Indian railway electrification zones.
- ✓Rectifier module diode failure and AC-side short circuit — Alstom rectifier and charger modules in fast-charging depots experience diode junction degradation from thermal cycling during multi-train charging cycles. Transient overvoltage from pantograph arc ignition can cause catastrophic diode failure, leading to AC-side phase-to-phase faults.
- ✓Firmware corruption and watchdog timer reset cycles — Alstom signalling and propulsion control modules experience flash memory corruption due to power supply ripple, ESD during maintenance, or EMI from traction inverter switching near control cables. Watchdog timer functionality degrades, causing periodic processor resets.
How We Repair Your ALSTHOM 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 ALSTHOM Equipment
We serve plant maintenance teams across all major industries where ALSTHOM automation is deployed.
Frequently Asked Questions — ALSTHOM Repairs
Do you repair Alstom equipment anywhere in India?+
Yes. Synchronics repairs the full Alstom product range — traction inverters, propulsion control units, signalling modules, and pantograph electronics. We offer PAN India door pickup from Mumbai, Delhi, Pune, Chennai, Hyderabad, Ahmedabad, Bangalore, Kolkata, and all other cities. Same facility in Vadodara, Gujarat. Turnaround time for Alstom traction systems is typically 10-15 working days.
What is Alstom MITRAC inverter repair and how long does it take?+
MITRAC inverters are high-power semiconductor modules controlling train motor acceleration and speed. Common repairs include IGBT module replacement, capacitor bank refurbishment, gate drive circuit reconstruction, and firmware reprogramming. Synchronics stocks original-spec IGBT modules and performs full thermal and electrical characterization. Standard repair takes 12-14 days; express service available for Indian Railway emergency calls.
Do you repair Alstom signalling system modules like SmartLock and CBTC?+
Yes. Synchronics specializes in repairing Alstom SMARTLOCK interlocking and CBTC (Communication Based Train Control) modules. We handle microcontroller reprogramming, CAN transceiver replacement, relay logic reconstruction, and trackside/onboard controller failures. Metro rail operators across India trust Synchronics for zero-downtime repairs. We maintain stock of critical Alstom signalling spare boards.
What kind of Alstom PCU (Propulsion Control Unit) faults can Synchronics repair?+
Alstom PCU units manage onboard power distribution, traction control, and auxiliary systems in electric trains. Synchronics repairs firmware corruption, CAN communication loss, relay driver failures, DC-DC converter faults, and power management circuit breakdowns. We also refurbish battery charger modules in hybrid trains. All repairs include 6-month warranty and carry original Alstom firmware validation.
How do I know if my Alstom equipment needs repair?+
Warning signs include intermittent speed fluctuations in trains, loss of pantograph contact or propulsion dropout, signalling system timeouts, error codes on the HMI, or brown-out restarts. Contact Synchronics with your equipment model, fault code, and symptom description. Our 180+ engineers will provide remote diagnostics within 2 hours for Indian Railways and metro operators, with on-site support available in major cities.
How do I send my ALSTHOM 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 ALSTHOM 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 ALSTHOM 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 ALSTHOM 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.
ALSTHOM Repair Catalog
Showing 1–7 of 7 ALSTHOM products
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Back in Action — Fast
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
No obligation
48hr Turnaround
Fastest in India
6-Month Warranty
Every repair
No Fix, No Charge
Zero risk policy
Pan-India Pickup
Doorstep service