1 / 18

Electric Power Voltage Sag Solutions: Coil-Hold-in-Devices (Coil-Locks)

Electric Power Voltage Sag Solutions: Coil-Hold-in-Devices (Coil-Locks). Presented by: Power Quality Solutions, Inc. (PQSI) Knoxville, Tennessee USA. February 2009. Symptoms of Electric Power Quality Problems. Power Quality problems are … … failure or misoperation

jamespjones
Télécharger la présentation

Electric Power Voltage Sag Solutions: Coil-Hold-in-Devices (Coil-Locks)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Electric Power Voltage Sag Solutions:Coil-Hold-in-Devices (Coil-Locks) Presented by: Power Quality Solutions, Inc. (PQSI) Knoxville, Tennessee USA February 2009

  2. Symptoms of Electric Power Quality Problems Power Quality problems are … … failure or misoperation … of customer end-use equipment … caused by voltage, current or frequency deviations

  3. The Voltage Sag Solution: PQSI Coil-Locks A cost-effective, low intrusive way to protect your vital equipment from voltage sags and dips.

  4. Energy User Surveys* Typical Number of Facility Voltage Incidents/Year Your Text Most devices will operate here Devices protected by a Coil-Lockswill operate here *Electric Power Research Institute (EPRI), Canadian Electric Associations (CEA), and National Power Laboratory (NPL)

  5. Typical Number Facility Voltage Sag Events* The PQSI Coil-Lock is not time based, therefore it maintains operation during sag events. *Electric Power Research Institute (EPRI), Canadian Electric Associations (CEA), and National Power Laboratory (NPL)

  6. Typical Voltage Sags in RMS Terms Your Text Power Quality Variation Category Example of a Voltage Sag RMS Variation Voltage Sags (RMS Disturbance) Your Text Method of Characterization Your Text • Magnitude & Duration Your Text Typical Causes Your Text • Utility System Faults • Motors Starting • Load Variations • Weather Conditions

  7. Duration (4 Cycles) 1 0.5 – 0 -0.5 – -1 – 8 0 1 2 4 5 6 7 3 Magnitude (50% of Nominal) Typical Voltage Sag Events* in Real-Time Terms * Voltage sag 50% depth with duration that can vary from 8 milliseconds to > 3 seconds due to across the line motors starting in industrial processes, air conditioners, and utility activities.

  8. Process Solenoid Relay & Contactor OperatedDevices that can “trip” with 25% Voltage Sag Events

  9. PQSI Coil-Lock Coil-hold-in-DeviceProtects for 75% Deep Sags(i.e. 25% Remaining Voltage)

  10. PQSI Coil-Lock Coil-hold-in-DeviceProvides SEMI F47 Voltage Sag Immunity Duration of Voltage Sag in Seconds 0.1 100 0.02 1 10 0.01 100 90 80 70 60 50 40 30 20 10 0 Equipment required to Operate in this region Percent of Equipment Nominal Voltage * See Note 1 for Explanation of this Pass/fail point Legend Pass Fail, but not required to pass Fail Equipment not required to Operate in this region * Area included in Specification 0.05 to 1 Second Voltage Sag Immunity – SEMI F47 SEMI Stepper/Washer, 240V 50 Hz power Model 2200, SN 99SW4502, 5/00 Note 1: This point (50% sag for 12 cycles) initially failed for L3-L1 sags with a “High Velocity Pressure Sprayer” fault, but passed for L1-L2 and L2-L3 sags.

  11. 2 3 PQSI Coil-Lock Applications 1 Coil-Locks Eliminate Weak Links … Relays, contactors, and motor starters are used extensively in commercial and industrial facilities to control business machines and process equipment. These devices often have a low tolerance to electric service voltage sags, and are frequently diagnosed as “weak links” in automated production lines. Coil-Locks Eliminate Costly Equipment Shutdown … During common voltage sags, the solenoid coils in these motor-driven systems may de-energize long enough to cause the power circuit mechanical contacts to open (chatter), and the connected electrical equipment to shutdown. The Coil-Lock eliminates costly process shutdown, installs in minutes, and can be a cost-effective alternative to other voltage sag protection methods. Coil-Locks Eliminate Disruption of Operations … This situation can impact an entire manufacturing facility The Coil-Lock is available in different models to be compatible with most solenoid operated relays and contactors, and is ideal for protecting master control relays, and E-stop circuits. .

  12. Good Place to Begin “Hardening”:Emergency Off (EMO) Circuit (Simplified)

  13. PQSI Coil-Lock: Simple Installation

  14. Coil-Lock Coil-Lock Coil-Lock Coil-Lock PQSI Coil-Lock: Field Installations NEMA Size 1 NEMA Size 3 NEMA Size 5 SEMI F47 Equipment

  15. PQSI Coil-Lock: 120Vac & 240Vac Models Coil-Lock 120Vac Models Coil-Lock 240Vac Models

  16. PQSI Coil-Lock: Selective Power Conditioning

  17. Summary Power line variation impacts such as Voltage sags can be minimized with PQSI Coil-Locks. Strategy Challenges Forward History

  18. Thank You! Special Thanks to: EPRI, CEA, and NPL Corporations for use of their ongoing Power Quality System Compatibility Research Prepared by Power Quality Solutions, Inc. Knoxville, TN USA

More Related