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Publication Title | Model C30 Generator Terminal Block Torque Requirements

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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Telephone: (818) 734-5300 • Facsimile: (818) 734-5320 • Website:

Service Notice SN0004

Date: From:

Safety Precautions

Only Capstone Authorized Serviced Providers should open the MicroTurbine and other equipment connected to the MicroTurbine. The systems can include multiple sources of power. Observe and adhere to the Safety Instructions contained within the MicroTurbine User’s Manual.


Model C30 Generator Terminal Block stud material was changed from brass to stainless steel on 04/26/01. This material change resulted in a requirement to increase torque from 20 inch-pounds to 35 inch-pounds on the 11/32-inch nut at the 3-phase connections for all affected units. The ground terminal torque requirement remains at 30 inch-pounds.

Capstone recommends that the new torque be verified on affected field units containing the stainless steel generator terminal blocks at the next regularly scheduled service interval due to the high voltage nature of the connection.

All units shipped prior to May 2001 that have the old generator terminal block with brass studs do not require retorquing to the new 35 inch-pound requirement.


It is the responsibility of Capstone to provide this Service Notice to Authorized Service Providers.

It is the responsibility of the Authorized Service Providers to contact the customer and schedule a service visit.

After completion of the task, it is the responsibility of the Authorized Service Providers to provide Capstone with a Field Service Report.

If you have additional questions, please contact Capstone at:

450032-001 Rev B (February 2004) Page 1 of 1

This information is proprietary to Capstone Turbine Corporation. Neither this document nor the information contained herein shall be copied, disclosed to others, or used for any purposes other than the specific purpose for which this document was delivered. Capstone reserves the right to change or modify without notice, the design, the product specifications, and/or the contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction.


Systems Affected

February 2004

Capstone Technical Support

Model C30 Generator Terminal Block Torque Requirements All existing Capstone Model C30 MicroTurbine systems shipped after May 2001.

Capstone Technical Support

Toll Free Telephone: (877) 282-8966 Service Telephone: (818) 407-3600 Facsimile: (818) 734-1080


Capstone Technical Support (Japan)

Service Telephone: (818) 407-3700 Facsimile: (818) 734-1080


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