It’s not everyday you get to see one of these. It’s a 2300V, 400HP, 2 pole compressor motor in a 447TY frame. This one was proactively pulled due to excessive temperatures and showed eccentricity in the airgap. It was determined that some of the air inlet screens were completely clogged up, housings had TIR to register fits and shaft had excessive TIR for a 2 pole motor. This motor will be rewound with Class H insulation, both end brackets bored and sleeved to true up housings to fits and a new shaft made.
Here’s some in process pictures of a 560kW water cooled 4 pole motor. This one has been a fun wind. A very long and narrow bore. Our rewind on this motor will exceed the IEC standard for electrical testing of an IVIC code D. Just putting inverter duty wire in it isn’t enough. The high potential test values required exceed the 2E + 1kV norms and it must be PD free to a higher value than norms. EEMSCO’s inverter duty windings are up to that task.
Here are some before and after pictures of a 1000HP, 575V definite purpose VFD driven motor after a complete refurbishment including a rewind with magnetic wedges. Our team at EEMSCO, INC. takes pride in making the equipment look better than new when it is returned. Not only does it look better than new, it will perform as good or better than new. This particular motor is an IEC frame. The coil insulation scheme from the OEM requires that the motor be tested to higher than standard values on it’s electrical tests, due to the VFD configuration it is connected too.
All rewinds at EEMSCO are tested at values that meet or exceed the NEMA MG-1 Part 31 or IEC 60034-18-41 standards for inverter duty rated systems. The acceptance criteria has changed in 2024 and 2025. This means that our surge test and high potential test values are higher than the normal values. We conduct partial discharge testing on the windings to ensure they are PD free up to the values required by the standards. Part of meeting the IEC 60034 standard states that the motor must pass it’s high potential test completely assembled and all wires terminated on terminal blocks. These tests don’t ensure a quality rewind, they prove it. You can’t test quality into your process, but you can surely validate quality work by testing properly.
As the industry continues to advance, so do we. Just as we have over the last 100+ years.
Thank you team for your dedication to serving your internal and external customers with excellence. That is the EEMSCO “way”!
200/200HP, 4/6 pole, 2.3kV motor with 72 slots. It’s not a PAM winding and has 2 sets of leads (one for each speed). Coils only have 1 pitch and 2 coils per slot like a standard form coil would. Connection for each winding is 1Y. ...
A rush 2300V, 1179RPM, 450HP, high starting torque fan motor rewind. This sleeve bearing machine needed a rush rewind. In 3 weeks, we had it back to the customer. This could have been done a week quicker, but we require sample coils and fully fit and test them prior to a rewind.
It’s not everyday you get to see one of these. It’s a 2300V, 400HP, 2 pole compressor motor in a 447TY frame. This one was proactively pulled due to excessive temperatures and showed eccentricity in the airgap. It was determined that some of the air inlet screens were completely clogged up, housings had TIR to register fits and shaft had excessive TIR for a 2 pole motor. This motor will be rewound with Class H insulation, both end brackets bored and sleeved to true up housings to fits and a new shaft made.
#EEMSCO #trustedpartner #ACmotor #mediumvoltage #rewind ...
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Here’s some in process pictures of a 560kW water cooled 4 pole motor. This one has been a fun wind. A very long and narrow bore. Our rewind on this motor will exceed the IEC standard for electrical testing of an IVIC code D. Just putting inverter duty wire in it isn’t enough. The high potential test values required exceed the 2E + 1kV norms and it must be PD free to a higher value than norms. EEMSCO’s inverter duty windings are up to that task.
#EEMSCO #trustedpartner #VFD #rewind #acmotor ...
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Always enjoyable when people walk through our shop and comment on how nice the new motors look and you let them know those are ones we’ve repaired.
Our team is taking great pride in making sure our customers assets are as good as new when they leave, both inside and out!
#EEMSCO #trustedpartner #motorrepair #acmotor ...
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Nice looking fan reconditioned, balanced, and ready to head back to our customer! ...
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Here are some before and after pictures of a 1000HP, 575V definite purpose VFD driven motor after a complete refurbishment including a rewind with magnetic wedges. Our team at EEMSCO, INC. takes pride in making the equipment look better than new when it is returned. Not only does it look better than new, it will perform as good or better than new. This particular motor is an IEC frame. The coil insulation scheme from the OEM requires that the motor be tested to higher than standard values on it’s electrical tests, due to the VFD configuration it is connected too.
All rewinds at EEMSCO are tested at values that meet or exceed the NEMA MG-1 Part 31 or IEC 60034-18-41 standards for inverter duty rated systems. The acceptance criteria has changed in 2024 and 2025. This means that our surge test and high potential test values are higher than the normal values. We conduct partial discharge testing on the windings to ensure they are PD free up to the values required by the standards. Part of meeting the IEC 60034 standard states that the motor must pass it’s high potential test completely assembled and all wires terminated on terminal blocks. These tests don’t ensure a quality rewind, they prove it. You can’t test quality into your process, but you can surely validate quality work by testing properly.
As the industry continues to advance, so do we. Just as we have over the last 100+ years.
Thank you team for your dedication to serving your internal and external customers with excellence. That is the EEMSCO “way”!
#EASA #ACMOTORS #REWIND #VFD #RELIABILITY ...
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Happy 4th everyone!! ...
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Here’s a fun one!
200/200HP, 4/6 pole, 2.3kV motor with 72 slots. It’s not a PAM winding and has 2 sets of leads (one for each speed). Coils only have 1 pitch and 2 coils per slot like a standard form coil would. Connection for each winding is 1Y. ...
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A rush 2300V, 1179RPM, 450HP, high starting torque fan motor rewind. This sleeve bearing machine needed a rush rewind. In 3 weeks, we had it back to the customer. This could have been done a week quicker, but we require sample coils and fully fit and test them prior to a rewind.
Very proud of our team!
Well done everybody! ...
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