Auto Phase ChangeoverPhase Protection · Auto Phase Changeover
Get Best Price- Model Type
- Auto Phase Changeover · Phase Protection
- Operation
- Auto Phase Changeover · Shifts load to healthy phase automatically during phase fail
- Rating Range
- 40 A - 100 A
- Best Suited For
- Single Phase Output
Auto Phase Changeover panel automatically shifts the load to a healthy phase when one phase fails or voltage drops/spikes. Ideal for single-phase loads on 3-phase supply.
What is Auto Phase Changeover?
Auto Phase Changeover is a auto phase changeover phase protection panel from Subtech (S S Power System), covering 40 A HP to 100 A HP. It is part of Subtech's power and energy managment range and is commonly used for induction motors, pumps, compressors and other industrial and agricultural machinery. Protection features include overload and short-circuit protection.
Key Specifications at a Glance
Quick reference before you scroll through the full spec sheet
Why Choose Auto Phase Changeover?
What actually matters when you put this on your line
Automated Operation
Reduces manual switching and operator error by handling the start-up sequence on its own.
Wide HP Range
Covers 40 A - 100 A HP, so one series can standardise across multiple motor sizes on site.
Built for Industrial & Pump Applications
Designed for the duty cycles seen in pumps, compressors, HVAC systems and general industrial motor loads.
Custom Panel Manufacturing Support
Subtech can adapt enclosure size, ratings and add-ons to project-specific requirements on request.
Rust-Resistant, Field-Ready Enclosure
Powder-coated GI/GPSP enclosures are built for Indian site conditions — dusty factory floors, outdoor pump houses and agricultural sheds alike.
Backed by Subtech's Sales & Service Network
25+ years of panel manufacturing and a pan-India dealer network stand behind every unit.
How Auto Phase Changeover Works
Step-by-step operating sequence
- 1
Start Command Given
The panel receives a manual or automatic start signal.
- 2
Contactor Engages the Motor
The switching element connects the motor to the supply per this series' configuration.
- 3
Motor Runs Under Load
The motor operates at its rated duty for the connected application.
- 4
Protection System Monitors Faults Continuously
Built-in protections (see specification table) continue monitoring the motor throughout the run.
How to Select the Correct Model
Match your motor's HP rating to the correct reference number
| HP | Ref. No. | kW | Relay Range (A) | Protection | Size (mm) | MRP |
|---|---|---|---|---|---|---|
| 40 A HP | APC40 | — | — | — | — | On Request |
| 63 A HP | APC63 | — | — | — | — | On Request |
| 100 A HP | APC100 | — | — | — | — | On Request |
Common Problems This Solves
Real failure modes on the motor side, and how this panel prevents them
Frequent Tripping From Wrong Model Selection
Use the selection guide above to match your motor's HP and relay range to the correct reference number — an undersized relay setting is a common cause of nuisance tripping.
Description▾
Auto Phase Changeover panel automatically shifts the load to a healthy phase when one phase fails or voltage drops/spikes. Ideal for single-phase loads on 3-phase supply.
Additional Information▾
- Auto Corrects In Healthy Phasing
- Auto Cut Off On Under Voltage & Over Voltage
- Switching Time Is 3 Second
- Operating Voltage: 140-290 VAC
- Microcontroller Technology With Pre-Program Interlocking
- Minimum Heat Dissipation & Energy Losses
- Powder Coated GI Box
- Heavy Duty Connection Terminal (DMC)
- Load shifts to healthy phase during fail or low/high voltage
- Tamper Proof And Maintenance Free
Models & Pricing
3 models| Ref. No. | HP | MRP |
|---|---|---|
| APC40 | 40 A | On Request |
| APC63 | 63 A | On Request |
| APC100 | 100 A | On Request |
Who Should Buy Auto Phase Changeover?
This product is ideal for the following users and industries
Industrial Units & Factories
Manufacturing plants, processing units, and industrial facilities requiring reliable motor control and automation solutions.
Agricultural & Farming
Farmers and agricultural businesses using water pumps, irrigation systems, and motor-driven equipment for daily operations.
Contractors & Builders
Electrical contractors, panel builders, and construction professionals who need dependable motor starting solutions.
Commercial Establishments
Hotels, hospitals, offices, and commercial buildings with HVAC, lift, and pump motor control requirements.
Applications & Use Cases
Where you can use Auto Phase Changeover effectively
Water Pump Motor Control
Submersible, centrifugal, and booster pump motor starting, protection, and automation for residential and commercial use.
Compressor & HVAC Systems
Air compressors, chillers, and HVAC blower motor control in factories, commercial buildings, and cold storage units.
Conveyor & Material Handling
Belt conveyors, rollers, and material handling equipment motors used in manufacturing and logistics.
Irrigation & Agriculture
Drip irrigation, sprinkler systems, and tube well motors for farms and agricultural land management.
Generator & ATS Panels
Auto transfer switch panels and generator motor control for seamless power backup solutions.
CNC & Machine Tools
Lathe machines, drilling machines, and CNC equipment requiring precise motor starting and protection.
Frequently Asked Questions
Common questions about Auto Phase Changeover
What is the warranty on Auto Phase Changeover?▾
Subtech provides a standard manufacturer warranty on this product. Warranty terms may vary based on the specific model and configuration. Contact our sales team for detailed warranty information.
Can I get a customized version of Auto Phase Changeover?▾
Yes, Subtech specializes in custom panel manufacturing. We can modify specifications, ratings, enclosure types, and features as per your specific requirements. Share your needs through the quote form above.
What is the delivery time?▾
Standard models are typically available within 3-5 working days. Customized configurations may take 7-15 working days depending on complexity. We deliver across India.
Is installation support available?▾
Yes, Subtech provides installation guidance and technical support. For bulk orders, on-site commissioning support is also available. Our service team can assist with wiring diagrams and configuration.
Can I buy this product in bulk for my project?▾
Absolutely. We offer competitive bulk pricing for dealers, distributors, contractors, and project orders. Request a quote with your quantity for the best price.
Downloads
Technical documentation for this model
Related Technical Articles
Applicable Standards & Design Considerations
- IEC/IS 60947: Low-voltage switchgear and controlgear — general design reference for contactors, starters and protective devices, where applicable to the components used.
- IS/IEC 60529: Enclosure ingress protection (IP) ratings — referenced for enclosure design where an IP rating is specified for a given model.