Signature Series VFD's
1LH Signature and Performance Chassis

Commercial and Agriculture phase converting AFE VFD

The 1LH Series VFD is our active frontend (AFE), IEEE-519 compliant, phase-converting solution for commercial, and agricultural constant pressure installations. The 1LH offers simple setup, rugged hardware, and NEMA Type 3R enclosures. These VFD’s are easy to configure for pumping, irrigation, motor control, and soft start applications. Common applications include agricultural, municipal, or commercial pumping.

See the 1LH 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 1LH 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 1LH 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
1LHS220R, 1LH220R 20 HP 97 A 31 A Signature, Performance
1LHS230R, 1LH230R 30 HP 139 A 46 A Signature, Performance
1LHS240R, 1LH240R 40 HP 196 A 61 A Signature, Performance
1LH250R 50 HP 226 A 77 A Performance

460 V Model Comparison

Models Horsepower Rated Input Rated Output Chassis
1LHS420R, 1LH420R 20 HP 60 A 38 A Signature, Performance
1LHS430R, 1LH430R 30 HP 72 A 46 A Signature, Performance
1LHS440R, 1LH440R 40 HP 98 A 61 A Signature, Performance
1LHS450R, 1LH450R 50 HP 121 A 77 A Signature, Performance
1LHS460R, 1LH460R 60 HP 143 A 91 A Signature, Performance
1LHS475R, 1LH475R 75 HP 170 A 107 A Signature, Performance
1LHS4100R, 1LH4100R 100 HP 226 A 142 A Signature, Performance
1LH4125R 125 HP 273 A 172 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 1LH 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.

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1LH Series

Contact our sales department for terms and pricing on 1LH Series variable frequency drives.

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