EATON 9SX online UPS

When the load draws a surge the moment it starts, the UPS's overload capacity — not its rated VA — decides whether it survives.

EATON 9SX series product photo — Appearance for reference only; actual specification and accessories follow the quotation.

Brand: EATON
Type: Online double-conversion (high overload)
Typical use: Machine rooms, industrial loads, motors and pumps
Models covered: 9SX700I, 9SX1000I, 9SX1500I, 9SX2000I, 9SX3000I, EATON 9SX 5000i, EATON 9SX 6000i
Category: UPS systems / EATON

Product details Specifications

The load decides, not the catalogue

The 9SX exists because a subset of loads punishes ordinary UPS units: anything with a motor, a pump or a compressor draws a start-up surge far above its running current. Where a standard online unit would drop to bypass on every start, the 9SX rides through.

Sizing note

Size the 9SX on continuous load plus worst-case inrush, not on nameplate current. We measure or itemise the load before proposing a capacity — it is free, and it is the difference between a unit that works and one that trips every morning when the compressor kicks in.

Key features

Online double-conversion — output isolated from the mains
High overload capacity — rides through the inrush of motors, pumps and compressors without dropping to bypass
Wide input voltage window for sites with a visibly unstable supply
Rack/tower convertible to fit the existing room
Expandable battery modules and network monitoring supported
Suited to un-airconditioned or hot industrial spaces

Where it fits

Industrial and line control

PLCs, control panels and servo drives — large inrush on start, needs a UPS that rides through it.

Lab and test equipment

Compressor- or pump-driven instruments carry the same start-up surge.

Harsh equipment rooms

No air-conditioning, high ambient temperature or dust — a unit built to tolerate it.

Frequently asked questions

Why does overload capacity matter so much?

A motor can draw 3–7 times its running current for a second or two at start-up. An UPS with modest overload tolerance sees that as a fault and transfers to bypass — the load then runs on raw mains, which is exactly what the UPS was bought to prevent. The 9SX is built to absorb those starts.

9SX or 9PX — how do I choose?

Same online architecture. Choose the 9SX when the load includes motors, pumps or compressors, or the room is hot and un-airconditioned. Choose the 9PX for pure IT loads where rack density and the lithium option matter more.

Related models & accessories

EATON 9PX series

The mainstream choice for server rooms: online double-conversion keeps the output fully isolated from the mains, with efficiency and serviceability at practical levels.

View details

EATON DX / DX RT series

The workhorse of rack machine rooms: online architecture, rack installation, capacity configured after the load is actually measured.

View details

APC Smart-UPS RT / SRT external battery pack (192 V)

The right way to extend runtime: add the matching battery pack, rather than stringing together batteries of different specifications.

View details

Specifications

Capacity	0.7–6 kVA (by model)
Architecture	Online double-conversion
Overload capability	Higher than typical for the class — suits loads with inrush
Input voltage window	Wide-range design for unstable supplies
Output waveform	Pure sine wave
Form factor	Rack or tower, convertible
Runtime	Depends on load and external battery packs — sized against the actual load
Typical loads	Room equipment, industrial control, lab devices, motor-driven loads

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.

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