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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Telephone: (818) 734-5300 • Fax: (818) 734-5320 • Web: www.capstoneturbine.com

Service Bulletin SB0108

Date: From: Subject:

April 2011

Capstone Technical Support APS-145 Rewire for DMSC Power

Systems Affected

Capstone APS-145 units with serial number 100217 and lower and used in conjunction with a DMSC.

Summary

A wiring issue on the APS-145 will cause a connected DMSC to lose power when a grid outage occurs. The rewire procedure described in this document reroutes power to correct this issue.

Required Action

Affected APS-145 units must be rewired at commissioning as follows. (Refer to Capstone Advanced Power Server (APS) Model 145 Technical Reference (410079) for terminal locations.)

1. Prepare for rewire as follows.

a. Issue stop command to all connected turbines from APS panel PC.

b. Isolate APS from all external power sources.

c. Open APS door.

d. Turn off UPS by holding down button for ~5 seconds.

e. Use digital multimeter to verify that there is no voltage in APS circuits.

2. Rewire APS-145 as follows. See Figure 1.

a. Disconnect DC + (red) from terminal 1-3 power supply TB1 and connect DC + to top terminal 2-5 on TB2.

b. Disconnect DC - (black) from terminal 1-4 on power supply TB1 and connect DC - to bottom terminal 2-10 on TB2.

450110 Rev A (April 2011) Page 1 of 3

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. Copy is uncontrolled; user is responsible for verifying current revision.

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