Industrial-Frequency Power UPS — S-Series Single-Phase External Wall-Mount for Power-System Rooms

Some power-system rooms do not have a slot for the UPS inside the protection cabinet. Some have wall space, a clean floor footprint, and a clear service corridor. The S-series external tier delivers the same industrial-frequency online UPS platform with a true output isolation transformer — packaged for wall-mount or floor-standing installation next to the cabinet, not inside it. It is the right answer when the room architecture calls for a separate UPS enclosure.

Built for the rooms that need a separate UPS enclosure

The external tier is engineered for power-system rooms where the UPS belongs as its own enclosure — wall-mounted in tight rooms or floor-standing in larger ones — with front-accessible terminations, predictable thermal behaviour, and a service model that respects the realities of separate-enclosure service. The industrial-frequency online topology with a true output isolation transformer delivers the galvanic isolation and inrush tolerance the rooms expect.

Where it makes the difference

• Substation DC battery rooms where the UPS is wall-mounted alongside the DC panel.

• Plant-control rooms with separate UPS enclosures next to the DCS panel.

• Power-distribution automation rooms with a dedicated UPS enclosure.

• Rail-power and traction substation control rooms with separate UPS provisions.

• Energy-management and metering rooms where a separate UPS enclosure is the architectural choice.

What you gain

• An industrial-frequency online UPS with a true output isolation transformer, packaged for wall-mount or floor-standing installation.

• Front-accessible terminations and engineered thermal behaviour for separate-enclosure operation.

• DSP-based digital control with strong overload capability and inrush tolerance.

• Comprehensive self-diagnostics and a clear local display for the panel team.

• Standard communication interfaces — RS232, RS485, and dry contacts — for plant SCADA integration.

• An optional SNMP card for higher-level monitoring stacks.

• Compliance with industry-standard design codes for power-system environments.

How the platform works for you

The external tier uses the same industrial-frequency online double-conversion platform as the built-in tier, with a true output isolation transformer and an enclosure engineered for wall-mount thermal and service realities. The result is a clean sine output with galvanic isolation, predictable inrush behaviour, and a service model that respects the way separate-enclosure UPS systems are built and serviced.

Service, integration, and lifecycle

External units are supported by the same global field-engineering network as the SDL line, with regional spares and power-system-trained service teams. Integration with plant SCADA, DCS, and BMS is straightforward via standard interfaces, firmware updates are routine, and the enclosure is engineered for control-board upgradeability across generations.

Frequently Asked Questions

• Why external rather than built-in? When the power-system room does not have a slot inside the cabinet, a separate-enclosure UPS respects the room architecture.

• Does it provide true galvanic isolation? Yes — the output isolation transformer separates the load from the upstream distribution.

• Can it start heavy protection loads? Yes — strong overload capability and inrush tolerance are engineered in.

• What communication options are available? RS232, RS485, dry contacts, and an optional SNMP card.

• Is there a bypass for service? Yes — a maintenance bypass is provided for safe service on a live system.

• How is service handled? Regional spares, factory-trained power-system engineers, and predictable maintenance schedules.

• Is it future-proof? Modular firmware and a field-replaceable control board extend useful life across generations.

• What warranty and service options exist? A standard multi-year warranty with extended and on-site plans.

Information Security and Data Protection

Role-based access, audit-friendly event logs, and encrypted remote communication where supported by your plant SCADA or management platform protect operational data. Telemetry stays inside your plant network boundary by design.

Explore the Industrial-Frequency Power UPS Family

• Industrial-Frequency Power UPS — SDL Single-Phase Line for Power Plants and Substations

• Industrial-Frequency Power UPS — S-Series Single-Phase Built-In for Power-System Rooms

• Industrial-Frequency Power UPS — S-Series Three-Input Single-Output Built-In for Power-System Rooms