EATON 93PM Three-Phase UPS Hong Kong

Why the voltage version gets its own page

Because it is the easiest thing to get wrong and the hardest to fix in high-power UPS procurement.

A three-phase UPS is not plug-and-play. 208 V, 400 V and 480 V correspond to different distribution systems and different protection designs. Specify the wrong version and:

The unit arrives and will not connect to the site distribution.
You need an extra transformer, adding losses, heat and cost.
Protection coordination has to be redone; breakers and cables may all be wrong.
The schedule slips, and so does the date the room goes live.

There is one basis for the decision: the site's actual input voltage and distribution. That is why we ask for a single-line diagram or site photographs before quoting, and survey on site when it is warranted.

Five things we settle on a project this size

Input voltage and distribution — single feed or dual? Is there a generator?
Actual load and expected growth — today's figure, and the figure in three years.
Redundancy level — single unit, N+1, or higher.
Runtime target — waiting for the generator to start, or riding through a period.
Maintenance arrangements — bypass, on-site staff, remote monitoring.

Only once these five are settled does a configuration mean anything. Skipping them and comparing prices lands you with a system that looks well specified and does not fit.

Key features

Three-phase online double-conversion with the output isolated from the mains

208 V and 480 V versions, matching different regional distribution conventions

High operating efficiency for machine rooms that run continuously

Parallel redundant configurations supported

Integrates with machine-room monitoring

Suited to mid to large data centres and critical equipment rooms

Where it fits

A 208 V site distribution

Keep the existing voltage standard and avoid reconfiguring the distribution system.

A 480 V supply

For sites distributed at 480 V, with the full protection coordination that implies.

A mid-size data centre

Three-phase capacity without stepping up to a large modular frame.

Frequently asked questions

How do I choose between the 208 V and 480 V versions?

From the site distribution, not from preference. What matters is the incoming voltage, the existing panel rating, the transformer arrangement and what the equipment itself expects. Specify the wrong version and the unit either will not connect or needs another transformer stage. We confirm this before quoting and will ask for a single-line diagram or site photographs.

Can I just use a transformer?

Technically yes, but it adds losses, heat and cost, and it adds a failure point. Unless the site genuinely leaves no alternative, specify the version that matches the supply.

What is the difference between the 93PM and the 93T?

Both are three-phase online. The 93PM offers several voltage versions for different regional distribution habits; the 93T leans towards standard high-power configurations. Settle the voltage first, then compare capacity and architecture.

Specifications

Capacity range	Mid to large three-phase models (by model — confirm with us)
Architecture	Three-phase online double-conversion
Voltage versions	208 V / 480 V and others — confirm the site distribution first
Output waveform	Pure sine wave
Redundancy	Parallel redundancy supported
Maintenance	Maintenance bypass recommended
Typical sites	Mid to large machine rooms, data centres

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 93PM series three-phase online UPS