MCC Panels

Automatic Transfer Switch (ATS) Panel for Renewable Energy

Automatic Transfer Switch (ATS) Panel assemblies engineered for Renewable Energy applications, addressing industry-specific requirements and compliance standards.

Automatic Transfer Switch (ATS) Panel for Renewable Energy

Overview

Automatic Transfer Switch (ATS) Panel assemblies for renewable energy applications are engineered to maintain continuity of supply between utility incomers, generator-backed auxiliaries, battery energy storage systems, and inverter-fed sources in solar, wind, and hybrid plants. In practice, the ATS is often integrated with an LV main distribution board, auxiliary transformer secondary, or plant service board to support critical loads such as SCADA, lighting, fire protection, communications, HVAC, security, and tracker drives. For renewable sites, the control philosophy must accommodate intermittent generation, frequent source changeover, and long unattended operation, while avoiding nuisance transfers caused by voltage dips, frequency excursions, or transient harmonics from VFDs and power electronic converters. Design is typically based on IEC 61439-1 and IEC 61439-2 for low-voltage switchgear assemblies, with component coordination to IEC 60947-1 and IEC 60947-6-1 for transfer switching equipment. Where the ATS supports photovoltaic or battery interfaces, the surrounding distribution may also require IEC 60364 considerations for wiring, earthing, and protection coordination. In hazardous or dust-laden renewable environments such as inverter rooms, battery containers, or offshore wind substations, enclosure selection may need IP54 to IP66 protection, corrosion-resistant powder coating, anti-condensation heaters, and, where applicable, IEC 60079 or IEC 61439-0 style environmental verification practices. If installed in facilities subject to fire risk or severe arc events, arc containment and test evidence in line with IEC 61641 may be specified. Typical ATS panel architectures use 2-pole, 3-pole, or 4-pole changeover devices, with current ratings commonly from 63 A up to 4000 A, depending on auxiliary supply and plant demand. For larger renewable plants, the ATS may be implemented using ACBs with motor operators and interlocked control logic, or MCCBs for compact feeder transfer duty. Advanced panels often include PLC-based logic, protection relays, voltage and frequency monitoring relays, metering, event logging, remote annunciation, and Modbus TCP or RS-485 integration to a plant SCADA system. Where motors or pump skids are involved, the ATS may feed downstream VFDs or soft starters, requiring careful assessment of inrush, regeneration, and harmonic distortion. As an engineered assembly, the ATS panel can be built in forms of separation such as Form 2, Form 3, or Form 4 depending on maintainability and personnel access requirements. Short-circuit withstand ratings are selected according to system fault levels, commonly 25 kA, 36 kA, 50 kA, 65 kA, or higher, with verification of busbar thermal and dynamic strength, protective device coordination, and conditional short-circuit ratings where applicable. Renewable projects with remote sites also benefit from lockable isolation, manual bypass facilities, remote/auto/test selectors, and source prioritization logic that can favor grid, generator, or storage depending on site operating mode. Patrion, the engineering and manufacturing team behind mccpanels.com in Turkey, designs ATS panels for EPC contractors, OEMs, and plant operators who need IEC-compliant assemblies with documented testing, clear schematics, and robust field performance. Whether the application is a solar farm, wind turbine substation, BESS auxiliary room, or hybrid microgrid, the ATS panel is tailored to match the site’s electrical topology, ambient conditions, redundancy expectations, and lifecycle maintenance strategy.

Key Features

  • Automatic Transfer Switch (ATS) Panel configured for Renewable Energy requirements
  • Industry-specific environmental ratings and protections
  • Compliance with sector-specific standards and regulations
  • Optimized component selection for industry applications
  • Integration with industry-standard control and monitoring systems

Specifications

PropertyValue
Panel TypeAutomatic Transfer Switch (ATS) Panel
IndustryRenewable Energy
Base StandardIEC 61439-2
EnvironmentIndustry-specific ratings

Other Panels for Renewable Energy

Main Distribution Board (MDB)

Primary power distribution from transformer to sub-circuits. Rated up to 6300A. Houses main incoming breaker, bus-section, and outgoing feeders.

Metering & Monitoring Panel

Energy metering, power quality analysis, and multi-circuit monitoring with communication gateways.

Power Factor Correction Panel (APFC)

Automatic capacitor switching for reactive power compensation. Thyristor or contactor-switched, detuned or standard configurations.

PLC & Automation Control Panel

Process and machine control panels housing PLCs, I/O modules, relays, HMIs, and communication infrastructure.

DC Distribution Panel

DC power distribution for battery systems, solar installations, telecom, and UPS applications. MCCB/fuse-based DC protection.

Capacitor Bank Panel

Fixed or automatic capacitor bank assemblies for bulk reactive power compensation in industrial and utility applications.

Custom Engineered Panel

Bespoke panel assemblies for non-standard requirements — special ratings, unusual form factors, multi-function combinations.

Other Industries Using Automatic Transfer Switch (ATS) Panel

Commercial Buildings

MDB, lighting distribution, APFC, ATS, metering, BTS, capacitor bank, BMS integration

Industrial Manufacturing

MCC, PCC, VFD panels, MDB, APFC, automation panels, soft starters, harmonic filters, capacitor banks — full range

Data Centers

High-reliability MDB, PCC, ATS (STS), metering, APFC, BTS, DC distribution

Healthcare & Hospitals

ATS (critical power), MDB, generator control, lighting, metering, APFC

Marine & Offshore

Marine-certified panels, MCC, generator sync, ATS, PLC, classification society compliance

Infrastructure & Utilities

MDB, ATS, metering, BTS, lighting distribution, DC distribution

Frequently Asked Questions

The primary standard is IEC 61439-1 and IEC 61439-2 for low-voltage switchgear assemblies. For the transfer equipment itself, IEC 60947-6-1 is the key product standard for automatic transfer switching devices. In renewable sites, designers also consider IEC 60364 for installation practices, earthing, and protective measures. If the panel is installed in harsh coastal, dusty, or battery-container environments, enclosure and environmental verification become critical. In fire-exposed areas, IEC 61641 may be requested for arc fault testing, and IEC 60079 applies where the installation is in a hazardous atmosphere. A properly documented ATS panel should include routine test records, short-circuit withstand data, and a declaration of conformity aligned with the final assembly verification requirements of IEC 61439.
The choice depends on the earthing system and neutral management strategy. A 3-pole ATS switches only the phase conductors and leaves the neutral commoned, which is often acceptable in certain TN systems. A 4-pole ATS switches the neutral as well, which can be preferable where source earthing differs, where generator and grid neutrals must be separated, or where backfeed and circulating neutral currents are a concern. In solar-plus-storage or generator-backed auxiliary systems, the neutral arrangement must be coordinated with protection relays and upstream bonding. IEC 60947-6-1 and IEC 61439 verification principles should be used to confirm the selected topology is safe, maintainable, and compatible with the site protection scheme.
Yes. Renewable energy ATS panels are commonly supplied with PLCs, intelligent relays, and metering devices that communicate over Modbus RTU, Modbus TCP, or Ethernet/IP, depending on the project standard. Typical signals include source availability, bus voltage, frequency, breaker position, transfer mode, alarms, and event timestamps. Integration with SCADA is especially valuable in solar farms, wind plants, and hybrid microgrids because it enables remote operation, alarm acknowledgement, and performance trending. For robust operation, the communication architecture should be designed alongside the control logic, with segregation between power and signal wiring, surge protection, and proper EMC practices. Patrion can configure these interfaces to match EPC and OEM control philosophies.
Short-circuit ratings depend entirely on the fault level at the installation point and the upstream protective devices. In practice, ATS panels for renewable energy are often specified at 25 kA, 36 kA, 50 kA, or 65 kA at 400/415 V, although higher ratings may be needed at large utility-interfaced plants. The assembly must be verified for thermal and dynamic withstand under IEC 61439, and the transfer device itself must have suitable conditional short-circuit performance under IEC 60947-6-1 when coordinated with upstream ACBs or MCCBs. Correct busbar sizing, cable termination design, and protective discrimination are essential, especially where large inverter arrays or transformer-fed auxiliaries can produce high fault contributions.
The panel control logic is usually programmed to select a preferred source hierarchy based on availability, voltage and frequency stability, maintenance mode, and site operating strategy. For example, grid may be the normal source, generator may be a standby source, and battery-backed inverter supply may bridge transients or serve critical auxiliaries during outages. The ATS controller monitors source health through voltage and frequency relays, timers, and permissive inputs. In renewable plants, source prioritization may also consider daylight generation, state of charge, or dispatch commands from the energy management system. Proper interlocking prevents parallel closure unless the system is designed as a closed-transition transfer scheme.
Renewable sites can expose panels to UV radiation, dust, salt mist, humidity, vibration, and wide temperature swings. For that reason, ATS panels are often built with IP54 to IP66 enclosures, anti-condensation heaters, thermostatic fans or filters, corrosion-resistant hardware, and UV-stable finishes. Offshore wind or coastal solar parks may require stainless steel or heavily coated enclosures, while containerized BESS and inverter rooms may need thermal management and airflow control. If the environment is classified as hazardous, IEC 60079 requirements may influence enclosure selection and device certification. Environmental measures must be matched to the installation location, not assumed from the panel type alone.
They can, but the transfer logic and protection coordination must be designed carefully. VFDs and soft starters introduce inrush, harmonics, and control sensitivities that can affect transfer stability. The ATS should verify that downstream drives are in a safe state before source transfer, and some applications require drive ride-through or controlled shutdown logic. If the ATS feeds essential motor loads such as cooling pumps, tracker systems, or fire pumps, the panel may need motor protection relays, bypass contactors, and dedicated incomer/outgoing coordination. IEC 60947 device ratings, harmonic mitigation practices, and the drive manufacturer’s recommendations should all be considered during engineering.
Forms of separation depend on the size of the assembly, maintenance philosophy, and personnel access needs. Form 2 is often sufficient for compact auxiliary ATS panels, while Form 3 or Form 4 may be preferred where multiple outgoing feeders, metering sections, or maintenance segregation are required. Form 4 provides the highest degree of internal separation and can improve service continuity by allowing work on one section without exposing adjacent circuits. The final choice must be verified under IEC 61439-2, including clearances, creepage distances, and compartment design. In renewable plants with limited outage windows, a higher form of separation can materially improve maintainability and operational safety.

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