Powering India's AI Data Centres: Switchgear & DC Distribution – What Specifiers Need to Know

India's AI build-out runs on switchgear

India is in the middle of a data centre construction wave. Hyperscalers, colocation operators and enterprises are adding capacity across Mumbai, Chennai, Hyderabad, Noida and Bengaluru, and a growing share of it is designed for AI training and inference.

GPUs get the headlines, but every one of them depends on the electrical path behind it: the medium-voltage intake, transformers, low-voltage switchboards, UPS systems, busways and rack-level distribution. When that path is undersized, poorly coordinated or hard to maintain, the most expensive compute in the building sits idle.

For specifiers, AI changes the brief. Loads are denser, power flows are shifting toward DC, and uptime expectations leave no room for nuisance trips or long maintenance windows. This guide covers what consultants, MEP designers and EPC teams should look for when selecting switchgear and DC distribution for AI-ready data centres in India.

How AI workloads change the power profile

AI racks draw several times the power of a conventional enterprise rack, and that changes every layer of the distribution system. The table below compares typical design ranges; exact figures vary by GPU platform and cooling approach.

Parameter	Traditional enterprise / cloud	AI training and inference
Rack density	~5–15 kW per rack	~40–130+ kW per rack, rising
Load behaviour	Relatively steady	Sharp, synchronised swings as GPU clusters ramp up and down
Cooling	Mostly air	Liquid / direct-to-chip, adding pump and CDU loads
Feeder currents	Moderate	Very high per row, pushing busway and breaker ratings up
Fault levels	Moderate	Higher, as larger transformers and parallel sources are added

Three consequences matter most for switchgear selection:

• Higher current ratings in less space. Main and feeder breakers, busbars and busways must carry more current without growing the electrical room.

• Tighter protection coordination. Large, fast-changing loads demand selectivity that isolates a fault at the lowest level instead of tripping an upstream breaker that feeds an entire hall.

• Fewer conversion stages. Every AC-DC-AC conversion loses energy and generates heat. At AI-scale loads, those losses justify rethinking the architecture, which is why DC distribution is back on the table.

  
  

The AC power chain: MV to rack

Most Indian data centres still follow an AC architecture, usually built in redundant 2N or N+1 blocks. Each stage carries its own switchgear decisions:

1. Utility intake and MV switchgear (11 kV / 22 kV / 33 kV). Ring main units or MV panels with vacuum circuit breakers receive the grid supply, often from two independent feeders. Specify for the site's fault level, with remote monitoring and interlocking for safe switching.

2. Transformers. Step-down to 415 V AC. Dry-type or oil-type units are sized for the IT load plus cooling, with headroom for future density increases.

3. LV main switchboards (PCC). Air circuit breakers (ACBs) serve as incomers, bus couplers and generator breakers. Automatic transfer between utility and DG sets happens here, so ACB reliability, short-time withstand (Icw) and communication are critical.

4. UPS input and output boards. MCCBs and ACBs protect UPS modules and battery strings, with bypass arrangements for maintenance.

5. Distribution to the white space. Busways or PDUs feed rows and racks. MCCBs and MCBs provide branch protection, with selectivity back to the PCC.

Two design principles run through every stage. First, selectivity: a fault in one rack should trip only its branch breaker, never the upstream ACB. Second, concurrent maintainability: withdrawable breakers and well-segregated panels let teams service one path while the other carries the load.

The shift to DC distribution

DC distribution removes conversion stages between the grid and the GPU, and the industry is moving toward it for AI halls. Servers already run internally on DC, and batteries store DC. Converting AC to DC once, close to the source, avoids repeated AC-DC-AC losses in UPS systems and rack power supplies.

The main approaches being discussed and piloted globally are:

• 380 V / ±190 V DC — an established data centre DC standard used in some facilities for years.

• 800 V DC (or ±400 V DC) — promoted by GPU and server platform makers for next-generation AI racks, where very high rack power makes lower currents and thinner conductors valuable.

• DC-coupled battery and solar — battery energy storage and on-site renewables connecting on a DC bus without extra inverters.

  
  

Why DC switchgear is different

AC current crosses zero 100 times a second at 50 Hz, which helps a breaker extinguish its arc. DC current never crosses zero, so arcs are harder to break and devices must be designed specifically for DC duty. An AC-rated breaker cannot simply be reused on a DC bus.

Key DC devices include:

• DC switch disconnectors — for safe isolation of battery strings, rectifier outputs and DC feeders during maintenance. Look for a rated DC voltage that matches the bus, utilisation category DC-21B or DC-22B as applicable, and visible or clearly indicated isolation.

• DC MCCBs and DC ACBs — for overload and short-circuit protection on high-current DC feeders, with interrupting ratings verified at the actual system voltage.

• DC fuses and surge protection — for battery and semiconductor protection.

For most Indian projects today, the practical path is hybrid: an AC backbone with DC sections around batteries, renewables and high-density AI halls. Specifying DC-ready switchgear now avoids a costly retrofit later.

How LS Electric India supports data centre projects

LS Electric India brings the global power distribution expertise of LS ELECTRIC, Korea, to Indian data centre projects, covering the full chain from MV intake to DC distribution.

• MV switchgear and transformers for reliable grid intake and step-down.

• Susol air circuit breakers for PCC incomers, bus couplers and DG changeover, with high short-time withstand and communication options.

• Metasol and Susol MCCBs for UPS, busway and PDU feeders, with selectivity support.

• IEC 61439-compliant LV panels designed for compact footprints and safe maintenance.

• DC solutions, including DC switch disconnectors and DC breakers for battery systems, rectifier outputs and DC distribution buses.

• Application engineering support for fault-level studies, selectivity coordination and DC-readiness planning.

With a local team in India and LS ELECTRIC's experience in power and DC systems worldwide, specifiers get both product depth and on-ground support from design through commissioning.

Frequently asked questions (FAQs)

What switchgear is used in a data centre?

A typical data centre uses MV switchgear at the utility intake, transformers, LV main switchboards with ACBs, UPS boards with MCCBs, and busways or PDUs with branch breakers. AI-ready facilities increasingly add DC switchgear for battery and DC distribution systems.

What is a DC switch disconnector?

A DC switch disconnector is a manually or remotely operated device that safely isolates a DC circuit, such as a battery string or DC feeder. It is designed to interrupt DC current, which has no natural zero crossing and is harder to break than AC.

Can AC circuit breakers be used on DC systems?

Not unless the manufacturer explicitly rates them for DC at that voltage. DC arcs are more persistent, so breaking capacity on DC can be far lower than the AC rating. Always check the DC rating and utilisation category.

Which standards apply to data centre switchgear in India?

LV assemblies typically follow IEC 61439, breakers and switches follow IEC 60947, and MV switchgear follows IEC 62271, along with applicable Indian Standards and BIS certification.

Why is DC power distribution gaining interest for AI data centres?

DC distribution reduces AC-DC conversion stages, cutting energy losses and heat at very high rack densities. It also simplifies integration of batteries and solar.

Build the power backbone for AI now

AI data centres need switchgear that handles higher currents, tighter coordination and a gradual move to DC, all within a compact, maintainable footprint. Decisions made at the specification stage will decide whether a facility can scale with the next generation of GPUs or needs an expensive rebuild.

Planning a data centre or upgrading for AI workloads? Talk to the LS Electric India team about MV and LV switchgear, ACBs, MCCBs, IEC panels and DC switch disconnectors for your project. Contact us for application support and technical submittals.