PDF Publication Title:
Text from PDF Page: 028
Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Technical Reference: Dual Mode System Controller (DMSC) The DMSC issues a trip command to a shunt trip device in M1, and receives feedback from auxiliary contacts in M1 that indicate the isolation switch position (Open or Closed). Logic in the DMSC monitors these switch position inputs, and activates a latching relay (LRL1) if M1 opens without the DMSC issuing a trip command to do so. The operator will then either need to reset M1 directly, or acknowledge the unexpected operation by pressing the MANUAL RESET button (S3) on the front of the DMSC. The purpose for this is to avoid repetitive cycling where M1 automatically opens on its own, due to a fault, and then the DMSC automatically recloses M1, leading to another automatic fault tripping of M1, and so on. Care must be taken in selecting and adjusting M1 and adjusting the DMSC UVR so that in no case will M1 and the DMSC both respond at the same time to a potential fault condition. If this were to happen, the DMSC logic will not prevent cycling and potential equipment damage may result. Figure 10 shows an example of a properly coordinated application where M1 is a circuit breaker with overcurrent protection and the DMSC UVR settings are adjusted to avoid overlap of the two protective curves. The UVR has adjustments for under voltage pickup level and associated time delay. Recommended settings are pickup level at 85% of nominal voltage and time delay of 3 seconds. The UVR settings are represented in Figure 10 as per unit fault current (compared with M1 rated current) and the time delay in seconds. The UVR will operate for any fault current and time duration in the cross-hatched area. Figure 10. Coordination of Circuit Breaker (M1) and DMSC UVR 410071 Rev D (January 2010) Page 28 of 71 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. Improper coordination of the M1 circuit protective functions and DMSC UVR settings can cause repetitive automatic reclosure of M1, and may result in damage to M1 or other equipment. Ensure that circuit protective settings do not allow simultaneous operation of M1 and the DMSC UVR under fault conditions. CAUTIONPDF Image | Dual Mode System Controller DMSC
PDF Search Title:
Dual Mode System Controller DMSCOriginal File Name Searched:
410071D_Dual_Mode_System_Controller_DMSC_TR.pdfDIY PDF Search: Google It | Yahoo | Bing
Capstone Turbine and Microturbine: Capstone microturbines used and new surplus for sale listing More Info
Consulting and Strategy Services: Need help with Capstone Turbine, sizing systems, applications, or renewable energy strategy, we are here to assist More Info
Container Lumber Dry Kiln: Since 1991 developing and innovating dry kilns using standard shipping containers More Info
Supercritical CO2 Lumber Dry Kiln: Compact fast drying in 3 days or less for small amounts of wood and lumber drying More Info
BitCoin Mining: Bitcoin Mining and Cryptocurrency... More Info
Publications: Capstone Turbine publications for microturbine and distributed energy More Info
FileMaker Software for Renewable Energy Developing database software for the renewable energy industry More Info
CO2 Gas to Liquids On-Demand Production Cart Developing a supercritical CO2 to alcohol on-demand production system (via Nafion reverse fuel cell) More Info
Stranded Gas for low cost power Bitcoin Mining Using stranded gas for generators may provide breakthrough low power costs for cryptocurrency miners. More Info
CONTACT TEL: 608-238-6001 Email: greg@globalmicroturbine.com (Standard Web Page)