Signature Series VFD's
3LH Signature and Performance Chassis

Commercial and Agriculture AFE VFD

3LH Series drives have a unique active switching input module that does not produce high levels of harmonic distortion. These drives are IEEE-519 compliant with no additional harmonic filter required. The active front end also provides the added benefit of power conditioning for the VFD output. This allows the user to set the output voltage and control both the pump and pivot without concern for utility power fluctuations.

Optional voltage doubling on the 3LH Series drive utilizes a three-phase active front end to boost the 208-240V input and generate 460V three-phase output. This innovative capability eliminates the cost of a transformer and provides significant cost reduction in submersible or long lead applications by reducing the size of down-hole motor cables. Phase Technologies now manufactures optional factory-installed sine filters at a fraction of industry cost to further reduce expenses associated with long lead installations.

See the 3LH Enterprise for applications requiring less than 20 horsepower or 230 V output.

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System setup with Perfect Pressure requires only a few minutes and is capable of controlling complex pump systems with ease.

The 3LH Series VFD's control pressure consistently regardless of demand. The pump system runs smoothly with fewer instances of short cycling.


1LH Signature

The Phase Technologies 3LH is an industrial-grade product designed for harsh conditions.

Easy Installation

Service and Support

Standard 2-Year Warranty

230 V → 460 V Voltage Doubling Model Comparison

Models Horsepower Rated Input Rated Output Chassis
3LHS220R, 3LH220R 20 HP 61 A 31 A Signature, Performance
3LHS230R, 3LH230R 30 HP 91 A 46 A Signature, Performance
3LHS240R, 3LH240R 40 HP 121 A 61 A Signature, Performance
3LHS250R, 3LH250R 50 HP 142 A 77 A Signature, Performance
3LHS260R, 3LH260R 60 HP 172 A 91 A Signature, Performance

460 V Model Comparison

Models Horsepower Rated Input Rated Output Chassis
3LHS420R, 3LH420R 20 HP 31 A 31 A Signature, Performance
3LHS430R, 3LH430R 30 HP 46 A 46 A Signature, Performance
3LHS440R, 3LH440R 40 HP 61 A 61 A Signature, Performance
3LHS450R, 3LH450R 50 HP 77 A 77 A Signature, Performance
3LHS460R, 3LH460R 60 HP 91 A 91 A Signature, Performance
3LHS475R, 3LH475R 75 HP 107 A 107 A Signature, Performance
3LHS4100R, 3LH4100R 100 HP 142 A 142 A Signature, Performance
3LHS4125R, 3LH42125R 125 HP 172 A 172 A Signature, Performance
3LHS4150R, 3LH4150R 150 HP 198 A 198 A Signature, Performance
3LHS4200R, 3LH4200R 200 HP 250 A 250 A Signature, Performance
3LH4250R 250 HP 304 A 304 A Performance
3LH4300R 300 HP 362 A 362 A Performance
3LH4350R 350 HP 415 A 415 A Performance
3LH4400R 400 HP 478 A 478 A Performance
3LH4500R 500 HP 590 A 590 A Performance
3LH4650R 600-700 HP 680-730 A 680-730 A Performance


MCCB & Service Rated Disconnect

An external service disconnect and integral breaker for ease of maintenance or installations that require it to meet electrical code.

Surge Protection

Available factory-installed surge protection options include ProTec, single event MOV type, as well as Strikesorb. Strikesorb provides class-leading multiple hit protection ensuring continuous protection of your critical equipment.

Output Filter

460 V installations other than those with short lead lengths often require output filtering to protect the motor from damage.

Hand/Off/Auto (HOA) Switch with Speed Potentiometer

Externally mounted HOA switch and speed potentiometer. Used to switch between user or automatic control and adjust motor speed on the output of the drive.


Drive your pivot with the same solution used to control your pump using optional AuxPower, available on drives configured with a Performance Series chassis.

Extended Warranty

Although durable and robust in design, a little extra peace of mind never hurts. Phase Technologies is happy to offer an extended warranty for all of those applications that demand a bit extra.

About the Panel Shop

The options available for 3LH Enterprise VFD's are built-to-order in our UL 508A panel shop. Every drive is a custom drive at Phase, options typically do not impact lead times.

Read More about the Panel Shop


3LH Series

Contact our sales department for terms and pricing on 3LH Series variable frequency drives.

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