APC by Schneider Electric SY250K500D Scalable 250kW to 500kW Three-Phase Tower UPS

Overview

The APC by Schneider Electric SY250K500D is a 250kW (250 kVA) three-phase modular UPS in a tower form factor, scalable up to 500kW — purpose-built for data centers and large enterprise facilities where uptime is non-negotiable and power infrastructure must grow with the load. Unlike fixed-capacity systems that force a full replacement when requirements change, the SY250K500D lets you add capacity incrementally, protecting the capital you've already committed. This unit ships without a maintenance bypass or distribution frame, which suits installations where those components are already present or specified separately.

The Symmetra PX platform sits in a class of infrastructure that security architects, IT directors, and facilities engineers take seriously: commercial-grade UPS systems built for continuous operation under demanding environmental and electrical conditions. If you're specifying power protection for a multi-rack deployment, a critical surveillance operations center, or a manufacturing automation backbone, the SY250K500D belongs in your evaluation.

Key Features

• 250kW Output, Scalable to 500kW: Starting at 250kW (250 kVA) output capacity means you can right-size the initial investment and add power modules as load grows — no forklift upgrade required. For a new data hall coming online in phases, this is meaningful CapEx control over a 5–7 year lifecycle.
• 96% Efficiency: At 96% efficiency, losses across this system are approximately 10.4kW at full load — lower than most comparable three-phase UPS systems in the same power band. Over 8,760 hours of annual operation, that difference compounds directly into your facility's power cost and cooling load. Every percentage point of efficiency at 250kW scale matters on the utility bill.
• Output Voltage THD ≤ 6%: A total harmonic distortion of 6% on the output means sensitive downstream equipment — including networking gear, storage arrays, and precision instrumentation — receives clean, stable power. Excessive THD causes transformer heating, logic errors in sensitive electronics, and premature component wear; 6% is within the tolerance of virtually all commercial IT and AV equipment.
• Hot-Swap VRLA Batteries: Sealed Lead Acid (VRLA) batteries are field-replaceable without powering down the load. In a 24/7 facility, that means a degraded battery string gets swapped during business hours without scheduling a maintenance window or risking a planned outage. Battery recharge time of 3.5 hours after a full discharge event ensures the system is back to full runtime capacity before the next potential utility disturbance.
• 54 dB Noise Level: At 54 dB, this unit is quieter than many comparably sized three-phase UPS systems. For deployments in mixed-use spaces — raised-floor data rooms adjacent to occupied offices, or command centers with both rack equipment and staff — acoustic profile is a real installation consideration, not a footnote.
• Operating Temperature 0–40°C (32–104°F): Full-rated operation across a 40-degree Celsius window accommodates both well-controlled data center environments and less-conditioned industrial or utility spaces. The extended storage temperature range (down to -15°C) means units can be warehoused or staged in cold facilities without damage before commissioning.
• 0–95% Operating Relative Humidity (Non-Condensing): Broad humidity tolerance supports deployment in coastal facilities, warehouse environments, or regions with significant seasonal humidity variation. This isn't a