EATON 93PX and 93PR Modular UPS Hong Kong

What modular actually solves

A traditional high-power UPS carries three long-term problems:

Capacity bought up front — but the business grows gradually, so the early years run at low load: poor efficiency, wasted energy.
A fault means repairing the whole unit — long downtime, and spares at full-unit level.
Expansion means replacement — equipment in good order scrapped because it is out of capacity.

Modular separates those three: the power modules set capacity, the frame sets the ceiling. Need more, add modules; a module fails, swap it on line — the load never notices.

What we ask before sizing

What is the load today, and where will it be in three years? That sets the initial module count.
What redundancy level? N+1 is the usual starting point; higher availability needs separate design work.
Is there dual supply or a generator? It shapes the overall architecture and the runtime design.
Floor loading and cooling? High-power equipment has definite requirements for floor loading and air-conditioning capacity; confirm them first.
Who maintains it? With no on-site engineer, remote monitoring and alarming become mandatory rather than optional.

Quoting without settling these is guesswork. Our sequence is survey, then design, then price.

Key features

Modular architecture — power modules are added as capacity demand grows

On-line maintenance: a failed module is replaced without interrupting the load

N+1 and higher redundancy configurations supported

High operating efficiency, cutting long-run energy and cooling cost in a large room

Integrates with machine-room monitoring, with SNMP and remote alarms

Suits phased data-centre builds that expand with the business

Where it fits

A phased data centre

You do not have to buy full capacity on day one. Add modules as racks go live — easier on both capital and space.

A high-availability critical site

Needs N+1 or better, and needs maintenance to happen without dropping the load.

An energy-sensitive room

High efficiency cuts both the power bill and the cooling load — a visible difference over years of operation.

Frequently asked questions

Modular costs more than a monolithic unit — is it worth it?

Look at total cost of ownership. Modular lets you expand to actual demand, avoiding capital tied up in capacity you are not using and the poor efficiency of running a large unit at very low load. Maintenance replaces a module rather than the whole unit, so downtime risk and spares cost are lower. For phased builds that usually outweighs the initial premium. If the capacity requirement is fixed and known from day one, a monolithic unit is cheaper up front.

Is running at low load really wasteful?

Yes, and it is routinely overlooked. A high-power UPS loses efficiency sharply at very low load, which is energy wasted for years. One of the real values of modular is matching the number of active modules to the actual load, instead of backing a small load with one large frame.

What are the lead times and the construction sequence?

High-power equipment is normally ordered from the factory, with lead time depending on model and configuration, so plan early. Construction covers distribution and busway work, positioning, energisation testing, on-load acceptance and transfer testing. We provide the full schedule and the test records.

Specifications

Capacity range	Large three-phase, set by module configuration and redundancy design (confirm with us)
Architecture	Three-phase modular online double-conversion
Redundancy	N+1 and above supported
Maintenance	Power modules replaced on line, load uninterrupted
Output waveform	Pure sine wave
Expansion	Add power modules; the frame stays
Typical sites	Large data centres, cloud rooms, critical infrastructure

Specifications follow the manufacturer's latest data. Actual configuration must be sized against the site load, required runtime and distribution environment — this table is for selection reference only.

EATON 93PX / 93PR three-phase modular UPS