Tokyo, Japan — Mitsubishi Electric today spotlighted its FW-S10L-3.0K, a high-performance uninterruptible power supply (UPS) from the FW-S series, featuring improved power quality, flexible configuration, and upgraded battery health monitoring.
Key Highlights
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10-minute internal backup: Built as an “L” variant, the FW-S10L-3.0K delivers approximately 10 minutes of runtime under rated load (~2.1 kW), offering users sufficient hold-over during brief power interruptions.
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Wide input voltage tolerance: It accepts AC input voltages from 85 V to 144 V and frequencies from 47.5 Hz to 63 Hz, allowing stable operation even under fluctuating supply conditions.
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Flexible, clean output: Outputs are clean sine wave, with selectable output voltage between 100-120V ±2%, and either synchronous mode (tracking input frequency) or fixed mode (50 or 60 Hz) to accommodate different usage environments.
New Battery Degradation Detection (Firmware Update)
Mitsubishi recently updated its battery degradation indication for small capacity UPS models in the FW-S line, including the FW-S10L-3.0K. As of June 2022 production, with firmware version 03.25 or later, battery health is now evaluated more precisely by factoring in ambient temperature, rather than simply elapsed service time.
In detail:
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Older units (firmware up to 03.11) would show a “BATTERY” lamp if a self-test diagnosed battery degradation, based mostly on usage. Newer units both light “BATTERY” and flash a “LOCK” indicator when the battery is judged to have reached its expected lifetime, adjusted for temperature.
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This aims to provide earlier warning in hotter environments where batteries degrade faster, improving reliability and reducing unexpected downtime.
Technical & Install Features
Additional features of the FW-S10L-3.0K include:
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Tower or rack-convertible form factor, with terminal block and outlet connections.
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Overload protection: capacity of 110% load for 30 seconds, 140% for 3 seconds, after which bypass or shutdown is triggered.
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Remote monitoring and control via RS-232C / USB, external signals (e.g. remote ON/OFF, bypass switching), and compatibility with Mitsubishi’s UPS configuration and logging software.
