Every cooling motor is a potential point of failure. Protect your equipment from VFD-induced bearing damage and keep downtime off the table.
Data centers run on uptime, and uptime runs on cooling. Nearly every motor in a data center cooling plant is driven by a variable frequency drive (VFD), and those same drives quietly destroy the bearings that keep your cooling running.
That’s where SGS shaft grounding systems come in: they divert damaging shaft current away from the bearings, protecting the equipment that protects your data.
In most facilities, a failed motor bearing is a maintenance ticket. In a data center, it’s a threat to everything the facility exists to protect. When a cooling motor drops offline unexpectedly, temperatures climb fast, and the racks and the workloads running on them are at risk within minutes.
VFD-induced bearing damage is especially dangerous because it fails on its own schedule: bearings can degrade in months and give way with little warning, and the cost of that unplanned outage dwarfs the cost of the motor many times over.
Why the Risk Is Higher in a Data Center
A single facility can run dozens or hundreds of VFD-driven motors, and every one is a candidate for electrical bearing damage. Pair that density with zero tolerance for downtime, plus cooling loads climbing as AI and high-density racks move in, and unprotected bearings become one of the most avoidable risks in the building.
If you want to learn more, here’s how VFDs cause the damage.
SGS shaft grounding eliminates the electrical cause before it can reach the bearings, across your entire cooling plant.
Where Bearing Damage Happens
Anywhere a motor runs on a drive, shaft voltage can develop. In a data center cooling plant, that means:
- Computer room air handlers and air conditioners (CRAH/CRAC units)
- Chillers and chilled-water pumps
- Condenser-water pumps and cooling-tower fans
- Air-handling units and fan-wall arrays
- Coolant distribution units (CDUs) and pumps for liquid-cooled, high-density racks
The SGS Shaft Grounding Solution
SGS Shaft Grounding Systems divert shaft current safely to the motor frame, away from the bearings, across every type of cooling equipment:
- CR Series: axially mounted, sealed-brush system for standard NEMA and IEC frame motors. The fit for most cooling motors: CRAH/CRAC units, pumps, fans, and air handlers.
- SR Series: split-ring system for large-frame motors, grounding both shaft ends where circulating currents are a concern. Suited to large chiller and cooling-tower drives.
- DR Series: solid-ring system for motors that can be uncoupled, ideal for scheduled retrofits during planned maintenance windows.
Why SGS: Protection Without Downtime
You never take cooling offline to service it. The CR Series brush is sealed and field-serviceable, inspected and replaced in under a minute while the motor is still running. For a facility that can’t schedule a cooling shutdown, that sets SGS apart from ring-based devices that require the motor to be stopped and often disassembled.
- Fast availability: same-day shipping within the US and rapid international delivery, so a protective part is never the reason a repair waits.
- Built for continuous duty: long service intervals and simple rebuild kits.
- Proven and US-made: 40 years of shaft grounding experience, manufactured in the USA.
New Builds and Retrofits
SGS shaft grounding devices can be used for new or existing units.
For new facilities, SGS shaft grounding can be specified into cooling motors at the design stage, so protection is in place from commissioning.
For existing data centers, our systems are installed in the field as a retrofit, protecting the motors you already run without waiting for a failure to force the decision.
FAQs
Can shaft grounding be installed without shutting down the fab?
Yes. The CR Series brush is field-serviceable and can be installed or replaced in under a minute while the motor runs, so you protect cleanroom and process motors without taking the systems they serve offline.
Can shaft grounding be installed without shutting down the fab?
Yes. The CR Series brush is field-serviceable and can be installed or replaced in under a minute while the motor runs, so you protect cleanroom and process motors without taking the systems they serve offline.
Can shaft grounding be installed without shutting down the fab?
Yes. The CR Series brush is field-serviceable and can be installed or replaced in under a minute while the motor runs, so you protect cleanroom and process motors without taking the systems they serve offline.
Protect the Equipment That Protects Your Data
Tell us about your cooling equipment and motor frame sizes, and we'll recommend the right shaft grounding solution for your facility.