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Publication Title | Torque Requirements on Electrical Connections Capstone 60 MicroTurbines

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Capstone

Service Bulletin

Date: From: Subject:

September 2001

Capstone Customer Service

Torque Requirements on Electrical Connections Capstone 60 MicroTurbines

Capstone Customer Service Toll Free Phone: (877) 282-8966 E-mail: service@capstoneturbine.com Phone: (818) 734-5325 • Fax: (818) 734-1070

Introduction

This document provides instructions on applying torque to the Isolated Gate Bipolar Transistor (IGBT) electrical connections on the Capstone 60 MicroTurbine. Be sure to read and comply with these instructions.

Affected

All Capstone 60 MicroTurbines with Serial Numbers 001935 and lower will be affected. Adherence to torque requirements will serve to ensure top performance of your MicroTurbine.

Summary

It has been found that the IGBT DC bus connections on Capstone 60 MicroTurbines have not been tightened to the specified torque value. The existing torque used is 21 lb-in. The specified torque value is

45 lb-in.

Over time, these connections may become loose and contribute to the IGBT failures. The following procedure explains how to re-tighten the IGBT connections to the specified torque value of 45 lb-in.

513016-001 (Sept 2001) Page 1 of 8 Service Bulletin SB0026.

Capstone Turbine Corporation reserves the right to change or modify without notice the design, the equipment 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.

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