SECTION 01 | THE PLATFORM CAMBRIDGEPORT.NET - PAGE 20 04 - POWER & RELIABILITY OPTIMIZED POWER CLEAN POWER AT THE FAN ARRAY Why integral Active Front End drives matter when you put a thousand EC fans on the critical bus. THE FAN FLEET IS A POWER-QUALITY LOAD <1% THDI - BELOW IEEE 519, NO EXTERNAL FILTERS 0.98 POWER FACTOR ACROSS THE RANGE 92% MOTOR + DRIVE EFFICIENCY | IE5 Ride-through NO DROPOUT ON POWER TRANSFER One EC fan is electrically trivial. A hyperscale hall carries thousands — each a nonlinear load pushing harmonic current back into the bus. With conventional passive-rectifier ECM fans, the fix gets bought elsewhere: oversized transformers, external filters, line reactors, stranded design margin. The cooling plant becomes one of the biggest power-quality liabilities on the bus that feeds it. Standard on every Guardian — not an adder, not an option code. One fan platform line-wide, from a 4-fan GFA to a 12-fan custom plenum array: one submittal, one harmonic study input, one spares position. CONVENTIONAL ECM FAN ARRAY Passive diode rectifier draws distorted current Harmonics accumulate across the fleet — THDi 30%+ per drive External harmonic filters + line reactors specified downstream Oversized transformers & neutrals · reactive capacity consumed Fans drop out on ATS transfer — airflow dips at the worst moment GUARDIAN | INFINITUM INTEGRAL AFE SiC Active Front End draws sinusoidal current at the motor THDi <1% at the unit — IEEE 519 solved component by component No external filters, reactors or filter panels on the one-line 0.98 PF — reactive capacity returned to the IT load Ride-through: fans stay up through the transfer window PART-LOAD EFFICIENCY — REPRESENTATIVE CURVES PER INFINITUM AIRCORE EC+ PRODUCT DATA INFINITUM AIRCORE EC+ — STAINLESS WHEEL, INTEGRAL SIC AFE DRIVE OPTIMIZED FOR THE SPEEDS YOU ACTUALLY RUN Most EC motors lose efficiency below 70% speed — exactly where a redundant CRAH fleet lives. Aircore EC+ holds ~92% motor + drive efficiency across the range, so N+1 turndown saves energy instead of squandering it — with fewer motors and fewer amps freeing bus capacity for IT load.
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