GP50PL 50 HP Rotary Phase Converter

Before Installation - Important Notes

• ⚠️ Crucial Step: Never start the phase converter with a load, including transformers.
• Verify incoming service KVA size with your electric company; it must be larger than the idler motor's HP.
• Use bolt-down lugs for all connections; do not use wire nuts.
• Ensure all connections, including factory connections to the power block, are secure. Recheck connections after a few weeks of use.
• If the idler motor does not reach full speed upon powering up, shut down the phase converter immediately to prevent potential damage to the idler motor, which would void the warranty. Consult a qualified electrician if unsure.
• Installation must be performed by a licensed industrial electrician. These guidelines do not supersede local and state laws.

Power Requirements and Breaker Sizing

You will need to use a motor load type breaker, not a quick blow or trip breaker.

Breaker Sizing Guidelines:

• For a single machine with an inductive load (motors): Double the machine's full load amperage (FLA). For example, if the equipment pulls 20 amps, use a 40 amp breaker.
• For multiple machines: Double the amperage of the largest machine and add the amperage of other machines that will run simultaneously. For example, a 20 AMP Lathe, a 9 amp saw, and a 6 amp milling machine would require: (20 AMP x 2) + 9 AMP + 6 AMP = 40 + 9 + 6 = 55 amps. In this case, use the next standard size breaker, which would be a 50 Amp two-pole breaker.

Refer to the following specifications for minimum and maximum breaker sizes:

Wire and Breaker Sizes for GP50:

• Single Phase Input Wire (under 50 feet): 3/0 AWG Copper
• Idler Motor Wire: 1 AWG Copper
• Recommended Breaker/Fuse Size: Minimum 80 Amps / Maximum 250 Amps

For rural areas, increase the minimum breaker size by 20%.

Connecting the Idler Motor Wires

The following describes wire connections. Use bolt-down lugs, not wire nuts.

Idler Motor Wiring Configurations:

• For motors with 9 leads: Connect Lead 1, 7 to L1; Lead 2, 8 to L2; Lead 3, 9 to L3; and Leads 4, 5, 6 together.
• For motors with 12 leads: Connect Leads 1, 7, 6, 12 to L1; Leads 2, 4, 10, 12 to L2; and Leads 3, 5, 9, 11 to L3.

Phase Converter Panel Connections

Installation must be performed by an industrial licensed electrician.

General Connections:

• The Motor Load Breaker should be sized twice the full load amps of your equipment.
• Phase Converter Panel Input: Connect to a Single Phase Circuit Breaker Panel.
• Phase Converter Panel Output: Connects to a Load Center, 3PH Breaker Panel, or Equipment.
• A disconnect switch should be used if the wire run from the panel to the converter is over 50 feet.

Voltage Specific Connections:

• 230V Connection: For NL and PL Models (low voltage).
• 460V Connection: For NH and PH Models (high voltage).

Dimensions

Dimensional information for the GP50PL is available. (Note: Specific dimensions were not detailed in the provided text, only a section title).

50 HP Rotary Phase Converter Components

Note: Some items marked with '*' in the original document are listed here. Specific SKU#s or item numbers may be missing for some components as per the source.