IP Ratings

IP protection ratings for fans and motors explained, from IP54 to IP66, plus what the rating does not cover in wet, dusty or outdoor installations.

EC condenser fan entering fan standby mode below the 1.2V threshold
By longwell / July 27, 2026 / Engineering Case Studies

Below 1.2 Volts, This Fan Deliberately Stops

Everyone specifies the top of the control range. The bottom of it — wh...

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Fan filter kit adapting a 120mm axial fan to a 150mm cabinet cutout
By longwell / July 25, 2026 / Engineering Case Studies

The Cutout Is the Requirement, Not the Fan

The customer asked for a 150mm fan that barely exists. What their cabi...

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By longwell / May 11, 2026 / Engineering Case Studies

The Regulation Chose the Motor Before We Did

We usually explain why EC beat AC on the merits. In this order, the la...

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Fan terminal block for field wiring on a 310 VDC axial fan
By longwell / May 9, 2026 / Engineering Case Studies

No Flying Leads: Why the Customer Demanded a Terminal Block

Loose wires are fine on a bench. Across a thousand units wired in the ...

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longwell-lwbd3g310-092nh-02-pr
By longwell / May 6, 2026 / Engineering Case Studies

Battery System Cooling: Sourcing a 48V DC Centrifugal Fan

Learn how upgrading the impeller on a 48V DC centrifugal fan cuts acou...

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longwell-wi-6983620135-project
By longwell / May 6, 2026 / Engineering Case Studies

380V Industrial Blower: Upgrading a Unit to a 400W IP55 Limit

Read how our team built a custom 280mm centrifugal fan. It delivers 22...

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longwell-wi-6981494893-project
By longwell / April 30, 2026 / Engineering Case Studies

Compact Electronics Cooling with a 5V DC blower fan

Read how our engineering team met aggressive airflow and acoustic targ...

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longwell-wi-6980887054-project
By longwell / April 29, 2026 / Engineering Case Studies

Integrating a 25 m/s Industrial Air Curtain

Learn why direct-wiring a magnetic door switch to a 3.3 kW industrial ...

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By longwell / April 29, 2026 / Engineering Case Studies

24V Paired DC Cross Flow Fan System for Tight Spaces

Learn how we built a paired DC cross flow fan system. This exact 24V s...

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longwell-lwad17251hh-23-projec
By longwell / April 29, 2026 / Engineering Case Studies

Adding PWM Speed Control to a 48V Telecom Rack Fan

Read how we modified a standard 48V DC cooling fan to include 20kHz PW...

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