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Publication Title | SB0037 Model C30 Software Version 4.76 Release Notes

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Text | SB0037 Model C30 Software Version 4.76 Release Notes | 001


Service Bulletin

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

Date: From: Subject:


All Model C30 Capstone MicroTurbines.


Version 4.76 software has been released to support the Model C30 MicroTurbine systems. This release offers the following changes:

1. Properly initialize the current limit in the inverter DSP software for Stand Alone, MultiPac operation to prevent faults when a MultiPac Disabled unit joins a MultiPac already in the Load state. This service bulletin corrects the issue documented by Service Bulletin 000035 MultiPac Over Current faults.

2. Protective relay functions now support negative as well as positive phase sequencing. Previous versions of software supported anti-islanding functionality for positive (123) phase sequence, but not for negative (132) phase sequence. Systems operating in Grid Connect mode should verify that a positive phase sequence is being used or upload this latest software version. All dual mode units should already be connected with positive phase sequence due to the relay in the Dual Mode Controller and do not require this update.

3. All Foil Bearing RFC units must update to software version 4.76 to correct the fuel ramp rate.

4. Allow troubleshooting commands to be issued to a MultiPac Disabled unit as an individual unit. A disabled unit will not listen to the Master’s commands when it is MultiPac disabled.

5. Automatic retry logic was implemented to reduce incidents of 9011 GDSP Handoff faults providing higher system availability. Five attempts at rotation will be performed before a 9011 GDSP Handoff fault is reported.

6. Protective relay testing functionality has been implemented to be used in conjunction with the Protective Relay Test Adapter (PN 513390). Note that this hardware is not yet released.

This upgrade shall be performed on all C30 MicroTurbines in operation and before initial operation of any C30 system upon commissioning. Contact visit to download this latest and perform this software upload. If you have additional questions, please contact:

Capstone Technical Support

June 2002

Capstone Technical Support

SB0037: Model C30 Software Version 4.76 Release Notes



Toll Free Telephone:


(818) 407-3600 (818) 734-1080 (877) 282-8966

450001-001 (June 2002) Page 1 of 1 SB0037

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 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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