Lookout Brook Hydro Plant Refurbishment (Clustered), p. 4 of 96, $2,155,000

Size: px
Start display at page:

Download "Lookout Brook Hydro Plant Refurbishment (Clustered), p. 4 of 96, $2,155,000"

Transcription

1 Requests for nformation PUB-NP-6 NP 2010 CBA Lookout Brook Hydro Plant Refurbishment (Clustered), p. 4 of 96, $2,155,000 Q. n the report provided in Tab 1.2 Lookout Brook Hydro Plant Refurbishment, page 7, NP mentions arc flash zone of influence. f NP has investigated the extent of arc flash exposure in its facilities please provide the report that has been prepared. f not, please provide reasons why this investigation has not been undertaken. A. Newfoundland Power has not prepared a formal report on arc flash exposure for all of its facilities. Newfoundland Power has investigated the extent of arc flash exposure and completed arc flash hazard studies for all of its substation and hydro plant high voltage switchgear. Such studies are completed to current industry standards under the supervision of qualified professional engineers. Attachment A provides the arc flash study for Lookout Brook Plant. The arc flash zone of influence for the switchgear at Lookout Brook Plant is 633 inches or 16 metres. Newfoundland Power Capital Budget Application Page 1 of 1

2 Requests for nformation PUB-NP-6 Attachment A NP 2010 CBA Lookout Brook Arc Flash Hazard Study Newfoundland Power Capital Budget Application

3 ELECTRCAL ENGNEERNG ARCFLASHHAZARDSTUDY REASON FOR ARC FLASH HAZARD STUDY Arc Flash Hazard calculal ons to be done for all Metal Clad Swltrchgear Study revlslted after 403L. conversion.. from33;~ lo 66kV -- PONTS TO NOTE 1. PPE level class.. >4... at 16 ~nches (working :nside swilchgear), 2. PPE lgvei class 3 a1 36 inches (racking out breake!) - -

4 2.4kV 2.4kV LBK-T -Dl LBK-T -D2 LBK-01 -F N LL - OUTDOORS "1 ge- NDOORS LOCAL FEEDEF + & FOREBAY LNE 2ph Delta 2.4 kv 2.4kV 2.4kV LBK-G3-D LBK-PT-6-FD LBK-PT-6 LBK-PT-5-FD LW-PT-5 LBK-PT-3 LBK-S/S-0 LBK-PT-2 LBK-PT-1 S LBK-G3-B LBK-PT-2-FD --(,LBK-G~-GP PROTECTON -FD LBK-PT-1 SURGE LBK-PT-4-FO 1 LBK-PT-4 3OOOkVA 2889kVA 90% P.F. LBK-G3-DN Lorne W. - NEWFMlUDUWD ==k==== SNGLE LNE DAGRAM POWER A FORTS COMPANY PROMNCE - Of NEWWNDLAND PERMT HOLDER --r Dote: SWATURE hb Pnnn Urn LOOKOUT -- bw h "",& d *. BROOK Page 1 Of 1 -Yarw.,umL!Ex -*ruar=b-m APP: SLD NO ?

5 Rev 1.0 3/5/2008 Recheck of LBK-T fuse size; Steps to select power transformer fuse: 1. Select voltage rating 2. Check interrupting rating. 3. Select ampere rating and speed. 4. Check co-ordination with loadside device. 5. Check co-ordination with source side device. Fuse Voltage Rating Selection... HV system voltage (kv) Voltage rating selected should always be in excess of the system phase-to-phase voltage. Recall that in all likelihood one of any two fuses carrying fault current will melt before the other. Thus a full phase-to-phase recovery voltage will appear across the blown fuse. Fuse manufacturer Select holder type Select voltage rating Fuse interrupting rating... LLL maximum fault level at fuse Angle 3-phase. XR ratio for above. Assymetryfactor based on XR ratio (See graph window) Assymetrical L3 fault level Phase-to-ground maximum fault level at fuse location. Angle- phase-to-ground.

6 XR ratio for above. Assymetry factor based on XR ratio Assymetrical LG fault level S & C kv asymmetrical interrupting rating (MVA) S & C kv symmetrical interrupting rating (MVA) (f the rating is higher than the fault levels above, the selected fuse can interrupt these faults. A lower XR ratio for the fault levels above will allow a higher safety margin.) Determine fusing ratio /111//1///1/1111////1//1/1/1/1/1/111/1/1~ Fusing ratio = Fuse rating / Xfmr self-cooled MVA rating Transformer self-cooled MVA rating Full load amps at kv Transformer MVA rating with full cooling Full load amps at kv Select a fuse size Fuse letter code Fusing ratio with above Corresponding rating (MVA) Simple overload capacity (Transformer FL 12 x fuse rating) (A fuse will normally carry approximately 2X its current rating before it will start to melt.) mpedance limited secondary faults may reduce the short circuit current to the order of % of the transformer rated full-load current. Overcurrents of this magnitude definitely accelerate transformer aging and should be cleared promptly. This basically requires a low fusing ratio. S&C recommends that fusing ratios should be less than 1.5 and no greater than 2.0.

7 L 0 C AT 1 0 N Device Fuse Manufacturer Manufacturer's designation kv rating Size Fuse speed rating Holder type Manufacturer's catalog number Curve numbers Lookout Brook LBK-T-FD S&C SMD-1 A 69 80E Standard SMD-1A COMMENTS: L 0 C AT 0 N Lookout Brook Relay type MCGG22 System kv CT Ratio:l 20 CT connection Y Rated current of the CT secondary (n) 5 DEVCE ---> Relay range (increments of 0.05) Range in secondary amps (s) (relay range x n) Pickup setting (s/ln) Pickup setting, sec. amps (s) (pickup x n) Time multiplier (0.025-l)(increments of 0.025) MVA setting Operating Cuwe DEVCE ---> Relay range (increments of 1) Range in secondary amps (relay range x s) Pickup setting Pickup setting, sec. amps (pickup x s) MVA setting LBK-T -51 N LBK-T -50NLV 1-31 (5-155) X s > Very nverse COMMENTS Change the Pickup setting from 0.4 (2.3 33KV) to 0..2 ( KV).

8 Convert 403L to 66 KV Phase Settings 1>1 Function EC E nverse 1>1 Direction Non-Directional 1>1 Current Set A 1>1 TMS 100.Oe-3-1>1 treset 0 s s2 Function ~Tabled s3 Status Enabled 1>3 Direction Non-Directional 1>3 Current Set A r3 Time Delay fosf 1>4 Status Disabled > Blocking OOl-ll -. > Char Angle deg V CONTROLLED VCO Status Disabled. Change 14 Function from EC v nverse to EC E nverse. 2. Change 1>1 TMS from to Change 14 Current from 201 amps to 111 amps. 4. Change 1>3 Current set from 1359 amps to 795 amps. Page 3 of 6

9 Maximum Generation Fault LBK 2.4 kv Global Current Report Faulted Bus LBK 02 LBK 02 Branch id 403L(B) 403L(B) Type Line Line Fault type LLL LLL Branch Side ROB 403L-D3 LBK T-A la [A] la [deg] b [A] lb deg] c [A] lc [deg] n [A] 0 0 n [deg] 0 0

10 Minimum Generation Fault LBK 2.4 kv. LBK plant on. LBK 02 LBK G1 Generator 2.4 LLL Global Current Report l~aulted ~~~~~-~ Bus L8K 02 LBK 02 Branch id 403L(B) 403L(B) Type Line Line Fault type LLL LLL Branch Sid~ 41 ROB LBK T-A la [deg] lb [A] b [deg] lc[a] c [degl n [degl 0 0

11 Breaker clearing time Max Gen Breaker clearing lime Min Gen Fuse clearing lime Max Gen. Fuse clearing lime Min Gen. PLOTTNG VOLTAGE:66 kv BY: D. Jones beg-?hfd~#w ~f Plol shows miscoordinalion belween B ewr and Fuse. DATE: Sll~u- X.\COMM\Arc Flash\Planls\LBK\LBK 2009 Ravisw\LBK Mln Gen tcc

12 Breaker clearing time Max Gen PLOTTNG VOLTAGE:66 kv Breaker clearing time Min Gen Fuse clearing lime Max Gen. Stodv: X\COMM\Arc Flash\Planls\LBK\LBK 2009 Review\LBK Max Gen cc BY: D. Jones Fuse clearing lime Min Gen. LGrC l4 r(j FitV~r Plot shorn miscoordinalion behveen B ewr and Fuse. DATE:

13 Arc Flash Hazard LBK 2.4 kv with 80E fuses installed on LBK-T transformer. 403L converted to 66 kv EEE standard Faulted Bus LBK 2.4 LBK 2.4 Generation Max Min Fault LLL LLL Fault Current CT CT Plus Fuses Working Distance Flash Hazard Boundry cal cm PPE Level 4 >4 L.A.B " R.A.B P.A.B. 7" 7" Faulted Bus LBK 2.4 LBK 2.4 Generation Max Min Fault LLL LLL Fault Current CT CT Plus Fuses Working Distance Flash Hazard Boundry callcm PPE Level 3 3 L.A.B " R.A.B P.A.B. 7" 7" *Arc Flash Calculated for Switchgear and fixed conductor. Software won't supply Arc Flash results for clearing times over one second. L.A.B. R.A.B. P.A.B. Limited Approach Boundry Restricted Approach Boundry Prohibited Approach Boundry Miscoordination between STG-403L-B and LBK-T fuses for 2.4 kv bus fault. Used fuse Clearing Time for Arc Flash Study as this would be worst case.

14 EEE 1584 based arc flash calculator EEE 1584 Based Arc Flash Calculator and Warning Label Creator Eguivment Class between Conductors 104 mm. Grounding Type Grounded Working Distance mm. Available 3 Phase Bolted Current ka System Voltage 2400 Volt 1 agree to be bound with Terms & Conditions of this website. E Calculate Boundaries Equipment Type: Switchgear Typical Gap bw. Electrodes: 104mm. Grounding: Grounded Work Distance: mm. Arc Predicted Arcing Current: sec. Arc 15% Reduced Arc Current : sec. Available 30 Bolted Current: ka Predicted 30 Arcing Current: A System Voltage L-L: 2400 Volt Calculation Ma!! ncident Energy Exposure Protection Level Boundary ilyofep! (ca'/cm2) 100% Arcing Current % Arcing Current

15 EEE 1584 based arc flash calculator EEE 1584 Based Arc Flash Calculator and Warning Label Creator Equipment Class Swltchgear Gap between Conductors 104 mm. Groundtng T s Grounded Working Distance mm. (( Available 3 Phase Bolted Current ka System Voltage 2400 Volt H agree to be bound with Terms & Conditions of this website. Calculate Boundaries 3 Equipment Type: Switchgear Typical Gap bw. Electrodes: 104mm. Grounding: Grounded Work Distance: mtn. Arc Predicted Arcing Current: sec. Arc 15% Reduced Arc Current : sec. Available 3 0 Bolted Current: ka Predicted 3 0 Arcing Current: A System Voltage L-L: 2400 Volt ncident Ener~y Calculation Exposur-e Protection M e Boundary ofppe (cal/cm2) 100% Arcing 85% Arcing Current

16 EEE 1584 based arc flash calculator EEE 1584 Based Arc Flash Calculator and Warning Label Creator Equipment Class Switchgear J Gap between Conductors 104 mm. Groundine Tyw Grounded Working Distance mm. A-vacable 3 Phase Bolted Current ka System Voltage 2400 Volt agree to be bound with Tenns & Conditions of this website. Calculate Boundaries Equipment Type: Switchgear Typical Gap bw. Electrodes: 104m1n. Grounding: Grounded Work Distance: mm. Arc Predicted Arcing Current: see. Arc 15% Reduced Arc Current : sec. Available 30 Bolted Current: ka Predicted 30 Arcing Current: A System Voltage L-L: 2400 Volt Calculation Mode ncident Enerm Exposure (callcm :) Flash Protection Level Boundary dlpe 100% Arcing 85% Arcing Current

17 EEE 1584 based arc flash calculator EEE 1584 Based Arc Flash Calculator and Warning Label Creator Equip~nent Class Sw~tchgear Gap between Conductor$ 104 mm. Grounding Typ_e Grounded WorkingDistance mm, Available 3 Phase Bolted Current ka System Voltage 2400 Volt 3 1 agree to be bound with Terns & Conditions of this website. Calculate Boundaries 1 Equipment Type: Switchgear Typical Gap bw. Electrodes: 104mm. Grounding: Grounded Work Distance: mm. Arc Predicted Arcing Current: sec. Arc 15% Reduced Arc Currcnt : sec. Available 30 Bolted Currcnt: ka Predicted 30 Arcing Current: A System Voltage L-L: 2400 Volt Calculation Mode ncident Energy Exposure (callcm 2) Protection Level Boundary ofpee 100% Arcing 85% Arcing Current

18 A WARNNG 1 Arc plasn ana anock nazara Appropriate PPE Required Flash Hazard Boundary 44.1 cal cm2 Flash Hazard at 406 mm >4 PPE Level De-energize Switchgear or Change Protection Settings to Reduce Hazard Category nside Any Switchgear Cubicle Compartment VAC Shock Hazard l~~ui~ment Name LBK 2.4kV A WARNNG Arc Flasn ana anocn nazaru Appropriate PPE Required Flash Hazard Boundary 20.0 call cm2 Flash Hazard at 914 mm 3 PPE Level Flash Suit or nsulated Pants and Jacket; Hard Hat; Safety Glasses; Flash Suit Hood; Hearing, Hand & Foot Protection Breaker Operation - Open or Close Breaker Operation - Racking 2400 VAC Shock Hazard Equipment Name LBK 2.4kV Arc Flash and Shock Hazard Appropriate PPE Required 3 m Flash Hazard Boundary 8 cal cm2 Flash Hazard at 914 mm 2 PPE Level Flash Suit or FR Work Shirt With Either Flash Pants or FR Coverall & Denim Pants Hard Hat; Safety Glasses; Arc Rated Face Shield; Hearing, Hand &Foot Protection Breaker Operation With Cubicle Door Fully Secured 2400 VAC Shock Hazard Equipment Name LBK 2.4kV

Electrical Arc Hazards

Electrical Arc Hazards Arc Flash Analysis 1996-2009 ETAP Workshop Operation Notes Technology, 1996-2009 Inc. Operation Workshop Technology, Notes: Arc Inc. Flash Analysis Slide 1 Electrical Arc Hazards Electrical Arcs can occur

More information

AN EXAMPLE OF A STANDARD ARC FLASH PPE LABELING STRATEGY

AN EXAMPLE OF A STANDARD ARC FLASH PPE LABELING STRATEGY The Electrical Power Engineers Qual-Tech Engineers, Inc. 201 Johnson Road Building #1 Suite 203 Houston, PA 15342-1300 Phone 724-873-9275 Fax 724-873-8910 www.qualtecheng.com AN EXAMPLE OF A STANDARD ARC

More information

AN EXAMPLE OF A STANDARD ARC FLASH PPE LABELING STRATEGY

AN EXAMPLE OF A STANDARD ARC FLASH PPE LABELING STRATEGY The Electrical Power Engineers Qual-Tech Engineers, Inc. 201 Johnson Road Building #1 Suite 203 Houston, PA 15342-1300 Phone 724-873-9275 Fax 724-873-8910 www.qualtecheng.com AN EXAMPLE OF A STANDARD ARC

More information

ARC FLASH PPE GUIDELINES FOR INDUSTRIAL POWER SYSTEMS

ARC FLASH PPE GUIDELINES FOR INDUSTRIAL POWER SYSTEMS The Electrical Power Engineers Qual-Tech Engineers, Inc. 201 Johnson Road Building #1 Suite 203 Houston, PA 15342-1300 Phone 724-873-9275 Fax 724-873-8910 www.qualtecheng.com ARC FLASH PPE GUIDELINES FOR

More information

STANDARDIZING ARC FLASH PPE LABELS

STANDARDIZING ARC FLASH PPE LABELS The Electrical Power Engineers Qual-Tech Engineers, Inc. 01 Johnson Road Building #1 Suite 03 Houston, PA 1534-1300 Phone 74-873-975 Fax 74-873-8910 www.qualtecheng.com STANDARDIZING ARC FLASH PPE LABELS

More information

{40C54206-A3BA D8-8D8CF }

{40C54206-A3BA D8-8D8CF } Informative Annex D Incident Energy and Arc Flash Boundary Calculation Methods This informative annex is not a part of the requirements of this NFPA document but is included for informational purposes

More information

Arc Flash and NFPA 70E

Arc Flash and NFPA 70E Arc Flash and NFPA 70E Presented by: J.D. Kyle Safe Work Practices Wearing Proper PPE? OSHA 1910.333 (a) (1) not to work hot or live except : 1. De energizing introduces additional or increased hazards

More information

Arc Flash Analysis and Documentation SOP

Arc Flash Analysis and Documentation SOP Arc Flash Analysis and Documentation SOP I. Purpose.... 2 II. Roles & Responsibilities.... 2 A. Facilities Maintenance (FM).... 2 B. Zone Supervisors/ Shop Foremen... 2 C. PMCS & CPC... 2 III. Procedures...

More information

Steve Kovach District Sales Engineer

Steve Kovach District Sales Engineer Steve Kovach District Sales Engineer 630-740-7463 Steveekovach@Eaton.com Institute of Electrical and Electronics Engineers American Society of Safety Engineers 1 Electrical Hazards Electrical Hazards Shock

More information

First Draft Language

First Draft Language 110.16 First Draft Language (B) Service Equipment. In addition to the requirements in (A), service equipment shall contain the following information: (1) Nominal system voltage (2) Arc flash boundary (3)

More information

NOTICE ER Roland Flood Pumping Station Arc Flash Study

NOTICE ER Roland Flood Pumping Station Arc Flash Study NOTICE This document contains the expression of the professional opinion of SNC-Lavalin Inc. (SLI) as to the matters set out herein, using its professional judgment and reasonable care. It is to be read

More information

2018 Consultant s Handbook Division 26 Electrical ARC Flash Hazard Analysis

2018 Consultant s Handbook Division 26 Electrical ARC Flash Hazard Analysis 1 Summary 1.1 Provide a complete Arc Flash Hazard Analysis for the project indicated in the accompanying RFP. The Analysis may be performed: independent of the construction project in concert with the

More information

Arc Flash Calculation Methods

Arc Flash Calculation Methods Arc Flash Calculation Methods Course No: E04-033 Credit: 4 PDH Velimir Lackovic, Char. Eng. Continuing Education and Development, Inc. 9 Greyridge Farm Court Stony Point, NY 10980 P: (877) 322-5800 F:

More information

NFPA-70E. Electrical Safety in the Workplace. Standard for Edition

NFPA-70E. Electrical Safety in the Workplace. Standard for Edition NFPA-70E Standard for Electrical Safety in the Workplace 2015 Edition NFPA-70E 90.1 Purpose. The purpose of this standard is to provide a practical safe working area for employees relative to the hazards

More information

SECTION POWER SYSTEMS STUDIES

SECTION POWER SYSTEMS STUDIES PART 1 - GENERAL 1.1 RELATED SECTIONS: Refer to Division 15 for Mechanical requirements. Refer to Division 16 for Electrical requirements. 1.2 OBJECTIVE: A. The short-circuit study is to calculate the

More information

Arc Flash Hazard and Mitigation 2 nd Workshop on Power Converters for Particle Accelerators June 14 16, 2010

Arc Flash Hazard and Mitigation 2 nd Workshop on Power Converters for Particle Accelerators June 14 16, 2010 Arc Flash Hazard and Mitigation 2 nd Workshop on Power Converters for Particle Accelerators June 14 16, 2010 Paul Bellomo June 14-16, 2010 2nd Workshop on Power Converters for Particle Accelerators - Arc

More information

3Ø Short-Circuit Calculations

3Ø Short-Circuit Calculations 3Ø Short-Circuit Calculations Why Short-Circuit Calculations Several sections of the National Electrical Code relate to proper overcurrent protection. Safe and reliable application of overcurrent protective

More information

Short Circuit Current Calculations

Short Circuit Current Calculations Introduction Several sections of the National Electrical Code relate to proper overcurrent protection. Safe and reliable application of overcurrent protective devices based on these sections mandate that

More information

SECTION SHORT CIRCUIT, COMPONENT PROTECTION, FLASH HAZARD AND SELECTIVE COORDINATION STUDY

SECTION SHORT CIRCUIT, COMPONENT PROTECTION, FLASH HAZARD AND SELECTIVE COORDINATION STUDY SECTION 16075 - SHORT CIRCUIT, COMPONENT PROTECTION, FLASH HAZARD AND SELECTIVE COORDINATION STUDY PART 1 GENERAL 1.1 SUMMARY A. Section Includes: 1. Provide a short-circuit, component protection, flash

More information

SECTION OVERCURRENT PROTECTIVE DEVICE COORDINATION STUDY

SECTION OVERCURRENT PROTECTIVE DEVICE COORDINATION STUDY PART 1 - GENERAL 1.1 DESCRIPTION SECTION 26 05 73 OVERCURRENT PROTECTIVE DEVICE COORDINATION STUDY SPEC WRITER NOTE: Delete between // -- // if not applicable to project. Also, delete any other item or

More information

This section applies to the requirements for the performance of power system studies by both the Design Engineer and the Contractor.

This section applies to the requirements for the performance of power system studies by both the Design Engineer and the Contractor. Basis of Design This section applies to the requirements for the performance of power system studies by both the Design Engineer and the Contractor. Background Information A Short Circuit and Coordination

More information

U I. Time Overcurrent Relays. Basic equation. More or less approximates thermal fuse. » Allow coordination with fuses 9/24/2018 ECE525.

U I. Time Overcurrent Relays. Basic equation. More or less approximates thermal fuse. » Allow coordination with fuses 9/24/2018 ECE525. Time Overcurrent Relays More or less approximates thermal fuse» Allow coordination with fuses Direction of Current nduced Torque Restraining Spring Reset Position Time Dial Setting Disk Basic equation

More information

THREE PHASE PAD MOUNTED DISTRIBUTION TRANSFORMER ARC FLASH TESTING JUNE 23, 2009 FERRAZ SHAWMUT HIGH POWER LABORATORY NEWBURYPORT, MA

THREE PHASE PAD MOUNTED DISTRIBUTION TRANSFORMER ARC FLASH TESTING JUNE 23, 2009 FERRAZ SHAWMUT HIGH POWER LABORATORY NEWBURYPORT, MA THREE PHASE PAD MOUNTED DISTRIBUTION TRANSFORMER ARC FLASH TESTING JUNE 23, 2009 FERRAZ SHAWMUT HIGH POWER LABORATORY NEWBURYPORT, MA Witnessed by: Jim Phillips, PE, Consultant Craig DeRouen, ERMCO Director

More information

ADDENDUM NO. 2 PROJECT: COURTLAND PUMP STATION CONTRACT: IFB NO COM.00030

ADDENDUM NO. 2 PROJECT: COURTLAND PUMP STATION CONTRACT: IFB NO COM.00030 ADDENDUM NO. 2 PROJECT: COURTLAND PUMP STATION CONTRACT: IFB NO. 2018-008-COM.00030 To: Prospective Bidders of Record Date: December 17, 2018 The following changes, additions, revisions, and/or deletions

More information

Ft Worth IEEE-PES. Presented by: Doug Harris Specifications Engineer Dallas, TX. Arc-Flash Hazard Mitigation & Selectivity

Ft Worth IEEE-PES. Presented by: Doug Harris Specifications Engineer Dallas, TX. Arc-Flash Hazard Mitigation & Selectivity Ft Worth IEEE-PES Presented by: Doug Harris Specifications Engineer Dallas, TX Arc-Flash Hazard Mitigation & Selectivity Electrical hazards Energized circuit/conductor Today s power system engineer must

More information

Electrical Overcurrent Studies

Electrical Overcurrent Studies Electrical Overcurrent Studies 11-01-2011 Deliverables associated with electrical overcurrent studies are as follow : a. Draft Reports i. Construction Related Projects have the following draft reports

More information

Paul Dobrowsky Innovative Technology Services

Paul Dobrowsky Innovative Technology Services Significant Changes to NFPA 70E -2009 Edition Paul Dobrowsky Innovative Technology Services 2008 IEEE PCIC 1 Repeat Presentation This has been previously presented 2008 IEEE Electrical Safety Workshop

More information

Electrical Safety Policy Health and Safety FCX-HS03 Release 07/2018 Version 1

Electrical Safety Policy Health and Safety FCX-HS03 Release 07/2018 Version 1 Electrical Safety Policy Health and Safety FCX-HS03 Release 07/2018 Version 1 POTENTIAL FATAL RISKS Exposure to Electrical Hazards CRITICAL CONTROLS Access Control Barriers and Segregation Electrical PPE

More information

Arc Flash Mitigation An Overview. Gus Nasrallah, P.E. Electroswitch May 30, 2013

Arc Flash Mitigation An Overview. Gus Nasrallah, P.E. Electroswitch May 30, 2013 Arc Flash Mitigation An Overview Gus Nasrallah, P.E. Electroswitch May 30, 2013 Agenda Origin of Modern Arc Flash studies Why Now more than before NFPA 70E Standards Protection Zone IEEE 1584 2002 IEEE

More information

NATIONAL ELECTRIC SAFETY CODE 2012 EDITION

NATIONAL ELECTRIC SAFETY CODE 2012 EDITION NATIONAL ELECTRIC SAFETY CODE (ANSI C2 / NESC) 2012 EDITION Jim Tomaseski IBEW Director of Safety and Health EEI Safety and Health Committee Conference NESC 2012 IMPORTANT DATES SEPTEMBER 1, 2009 - Preprint

More information

Webinar: An Effective Arc Flash Safety Program

Webinar: An Effective Arc Flash Safety Program Webinar: An Effective Arc Flash Safety Program Daleep Mohla September 10 th, 2015: 2pm ET Agenda Arc Flash Defined and Quantified NFPA 70E / CSA Z 462 - Recent Updates What is the ANSI Z10 Hierarchy of

More information

2015 NFPA 70E. SESHA 2015 ARIZONA MINI CONFERENCE December 10, 2015 Intel Corporation

2015 NFPA 70E. SESHA 2015 ARIZONA MINI CONFERENCE December 10, 2015 Intel Corporation 2015 NFPA 70E SESHA 2015 ARIZONA MINI CONFERENCE December 10, 2015 Intel Corporation Introduction Jeffrey A. Pugh, P.E. Pugh Engineering LLC Bachelor of Science Degrees in Electrical Engineering and Computer

More information

Cause, Effect & Mitigation Strategies

Cause, Effect & Mitigation Strategies WSU HANDS ON RELAY SCHOOL 2019 Arc Flash Fault Cause, Effect & Mitigation Strategies Joe Xavier, Technical Manager West Region Arc Flash Fault - Agenda What is an Arc Flash? Why and when does Arc Flash

More information

TABLE OF CONTENT

TABLE OF CONTENT Page : 1 of 34 Project Engineering Standard www.klmtechgroup.com KLM Technology #03-12 Block Aronia, Jalan Sri Perkasa 2 Taman Tampoi Utama 81200 Johor Bahru Malaysia TABLE OF CONTENT SCOPE 3 REFERENCES

More information

Topic 6 Quiz, February 2017 Impedance and Fault Current Calculations For Radial Systems TLC ONLY!!!!! DUE DATE FOR TLC- February 14, 2017

Topic 6 Quiz, February 2017 Impedance and Fault Current Calculations For Radial Systems TLC ONLY!!!!! DUE DATE FOR TLC- February 14, 2017 Topic 6 Quiz, February 2017 Impedance and Fault Current Calculations For Radial Systems TLC ONLY!!!!! DUE DATE FOR TLC- February 14, 2017 NAME: LOCATION: 1. The primitive self-inductance per foot of length

More information

DC ARC FLASH. THE IMPLICATIONS OF NFPA 70E 2012 ON BATTERY MAINTENANCE

DC ARC FLASH. THE IMPLICATIONS OF NFPA 70E 2012 ON BATTERY MAINTENANCE DC ARC FLASH. THE IMPLICATIONS OF NFPA 70E 2012 ON BATTERY MAINTENANCE William Cantor, P.E. TPI Exton, PA 19341 Phil Zakielarz TPI Exton, PA 19341 Mario Spina Verizon Wireless Uniontown, OH 44685 Abstract

More information

Arc Flash Analysis Training

Arc Flash Analysis Training Arc Flash Analysis Training Contact us Today for a FREE quotation to deliver this course at your company?s location. https://www.electricityforum.com/onsite-training-rfq An arc flash analysis study is

More information

Key factors to maintaining arc flash safety

Key factors to maintaining arc flash safety APPLICATI TE Key factors to maintaining arc flash safety Arc flash and blast When an arc fault occurs, the result is a massive electrical explosion. The light and heat emitted by the explosion is known

More information

1960 Research Drive, Suite 100, Troy, Michigan with. REVISION: December 10, 2007 (Supersedes previous versions) Prepared by:

1960 Research Drive, Suite 100, Troy, Michigan with. REVISION: December 10, 2007 (Supersedes previous versions) Prepared by: ENGINEERING SERVICES 1960 Research Drive, Suite 100, Troy, Michigan 48083 ARC FLASH REDUCTION with SEPAM RELAY ZONE SELECTIVE INTERLOCKING REVISION: December 10, 2007 (Supersedes previous versions) Prepared

More information

REDUCING ARC FLASH HAZARD BY REMOTE SWITCHING

REDUCING ARC FLASH HAZARD BY REMOTE SWITCHING The Electrical Power Engineers Qual-Tech Engineers, Inc. 21 Johnson Road Building #1 Suite 23 Houston, PA 15342-13 Phone 724-873-9275 Fax 724-873-891 www.qualtecheng.com REDUCING ARC FLASH HAZARD BY REMOTE

More information

DESIGN STANDARD DS 29

DESIGN STANDARD DS 29 Assets Delivery Group Engineering DESIGN STANDARD DS 29 VERSION 1 REVISION 2 MAY 2018 FOREWORD The intent of Design Standards is to specify requirements that assure effective design and delivery of fit

More information

Distribution/Substation Transformer

Distribution/Substation Transformer Distribution/Substation Transformer Type VFI, Vacuum Fault Interrupter Transformer Option Functional Specification Guide Functional specification for 15 kv, 25 kv, or 35 kv vacuum fault interrupter distribution/substation

More information

Selection of PPE Practical experience of different arc assessment methods and their comparison

Selection of PPE Practical experience of different arc assessment methods and their comparison Selection of PPE Practical experience of different arc assessment methods and their comparison Dr.-Ing. Thomas Jordan Markus Kauschke Slide 1 ICOLIM 2017 Selection of Arc Flash PPE BSD Electrical Safety

More information

COMMON SOURCES OF ARC FLASH HAZARD IN INDUSTRIAL POWER SYSTEMS

COMMON SOURCES OF ARC FLASH HAZARD IN INDUSTRIAL POWER SYSTEMS COMMON SOURCES OF ARC FLASH HAZARD IN INDUSTRIAL POWER SYSTEMS Joost Vrielink Hans Picard Wilbert Witteman Eaton Eaton SABIC-IP Europalaan 202 7559 SC Hengelo Europalaan 202 7559 SC Hengelo Plasticslaan

More information

Arc Flash Study Principles & Procedures for below 15 kv AC Systems. Xuan Wu, Dennis Hoffman, Ronald Wellman, and Manish Thakur

Arc Flash Study Principles & Procedures for below 15 kv AC Systems. Xuan Wu, Dennis Hoffman, Ronald Wellman, and Manish Thakur Arc Flash Study Principles & Procedures for below 15 kv AC Systems Xuan Wu, Dennis Hoffman, Ronald Wellman, and Manish Thakur Agenda Arc Flash Study Purposes Introduction of Arc Flash Arc Flash Risk Locations

More information

3. (a) List out the advantages and disadvantages of HRC fuse (b) Explain fuse Characteristics in detail. [8+8]

3. (a) List out the advantages and disadvantages of HRC fuse (b) Explain fuse Characteristics in detail. [8+8] Code No: RR320205 Set No. 1 1. (a) Explain about Bewley s Lattice diagrams and also mention the uses of these diagrams. [6+2] (b) A line of surge impedance of 400 ohms is charged from a battery of constant

More information

CHANGEABILITY OF ARC FLASH PARAMETERS AND ITS IMPACT ON HAZARD MITIGATION IN LOW VOLTAGE POWER SYSTEMS

CHANGEABILITY OF ARC FLASH PARAMETERS AND ITS IMPACT ON HAZARD MITIGATION IN LOW VOLTAGE POWER SYSTEMS CHANGEABILITY OF ARC FLASH PARAMETERS AND ITS IMPACT ON HAZARD MITIGATION IN LOW VOLTAGE POWER SYSTEMS by Abdeslem Kadri Bachelor of Engineering, Boumerdes University INELEC, 1996 A thesis presented to

More information

POWER SYSTEM ANALYSIS TADP 641 SETTING OF OVERCURRENT RELAYS

POWER SYSTEM ANALYSIS TADP 641 SETTING OF OVERCURRENT RELAYS POWER SYSTEM ANALYSIS TADP 641 SETTING OF OVERCURRENT RELAYS Juan Manuel Gers, PhD Protection coordination principles Relay coordination is the process of selecting settings that will assure that the relays

More information

ETAP PowerStation 4.0

ETAP PowerStation 4.0 ETAP PowerStation 4.0 User Guide Copyright 2001 Operation Technology, Inc. All Rights Reserved This manual has copyrights by Operation Technology, Inc. All rights reserved. Under the copyright laws, this

More information

S&C Vista Underground Distribution Switchgear Outdoor Distribution

S&C Vista Underground Distribution Switchgear Outdoor Distribution The offers superior overcurrent coordination. Among the features that provide excellent overcurrent coordination are unique coordinating speed tap and main time-current characteristic curves, which provide

More information

Arc Flash Hazard Standards:

Arc Flash Hazard Standards: Arc Flash Hazard Standards: The Burning Question Presented by Sesha Prasad Specialist Power System Engineer Welcon Technologies At IDC Electrical Arc Flash Forum Melbourne April 14th & 15th 2010. Session

More information

Poly Canyon Cogeneration System

Poly Canyon Cogeneration System Poly Canyon Cogeneration System By Jaideep Gill Senior Project Electrical Engineering Department California Polytechnic State University San Luis Obispo 2011 ii Table of Contents Section Acknowledgements

More information

ARC FLASH & PPE UPDATE. Michael Olivo, P.E. Aaron Ramirez, E.I.T.

ARC FLASH & PPE UPDATE. Michael Olivo, P.E. Aaron Ramirez, E.I.T. ARC FLASH & PPE UPDATE Michael Olivo, P.E. Aaron Ramirez, E.I.T. What is Arc Flash? Arc Flash is the release of heat and light produced when electrical current flows through an air gap between two conductors

More information

ARC FLASH HAZARD ANALYSIS AND MITIGATION

ARC FLASH HAZARD ANALYSIS AND MITIGATION ARC FLASH HAZARD ANALYSIS AND MITIGATION J.C. Das IEEE PRESS SERIES 0N POWER ENGINEERING Mohamed E. El-Hawary, Series Editor IEEE IEEE PRESS WILEY A JOHN WILEY & SONS, INC., PUBLICATION CONTENTS Foreword

More information

Design Approaches for Hospital Distribution Systems With Considerations for Future Expansion, Operator Safety, and Cost

Design Approaches for Hospital Distribution Systems With Considerations for Future Expansion, Operator Safety, and Cost Design Approaches for Hospital Distribution Systems With Considerations for Future Expansion, Operator Safety, and Cost Adam T. Powell, PE President Emerald Engineering, Inc. Jeffrey L. Small, Sr. Senior

More information

MV network design & devices selection EXERCISE BOOK

MV network design & devices selection EXERCISE BOOK MV network design & devices selection EXERCISE BOOK EXERCISES 01 - MV substation architectures 02 - MV substation architectures 03 - Industrial C13-200 MV substation 04 - Max. distance between surge arrester

More information

DISTRIBUTION DEVICE COORDINATION

DISTRIBUTION DEVICE COORDINATION DISTRIBUTION DEVICE COORDINATION Kevin Damron & Calvin Howard Avista Utilities Presented March th, 08 At the 5 th Annual Hands-On Relay School Washington State University Pullman, Washington TABLE OF CONTENTS

More information

Note: The let-through of the protective device must be equal to or less than the short-circuit current rating of the component being protected.

Note: The let-through of the protective device must be equal to or less than the short-circuit current rating of the component being protected. CONDUCTOR SHORT-CIRCUIT PROTECTION Introduction: This paper analyzes the protection of wire from fault currents. It gives the specifier the necessary information regarding the short-circuit current rating

More information

POWER SYSTEM PRINCIPLES APPLIED IN PROTECTION PRACTICE. Professor Akhtar Kalam Victoria University

POWER SYSTEM PRINCIPLES APPLIED IN PROTECTION PRACTICE. Professor Akhtar Kalam Victoria University POWER SYSTEM PRINCIPLES APPLIED IN PROTECTION PRACTICE Professor Akhtar Kalam Victoria University The Problem Calculate & sketch the ZPS, NPS & PPS impedance networks. Calculate feeder faults. Calculate

More information

NERC Protection Coordination Webinar Series June 9, Phil Tatro Jon Gardell

NERC Protection Coordination Webinar Series June 9, Phil Tatro Jon Gardell Power Plant and Transmission System Protection Coordination GSU Phase Overcurrent (51T), GSU Ground Overcurrent (51TG), and Breaker Failure (50BF) Protection NERC Protection Coordination Webinar Series

More information

Motor Protection. May 31, Tom Ernst GE Grid Solutions

Motor Protection. May 31, Tom Ernst GE Grid Solutions Motor Protection May 31, 2017 Tom Ernst GE Grid Solutions Motor Relay Zone of Protection -Electrical Faults -Abnormal Conditions -Thermal Overloads -Mechanical Failure 2 Setting of the motor protection

More information

Protection Introduction

Protection Introduction 1.0 Introduction Protection 2 There are five basic classes of protective relays: Magnitude relays Directional relays Ratio (impedance) relays Differential relays Pilot relays We will study each of these.

More information

SHORT CIRCUIT ANALYSIS OF 220/132 KV SUBSTATION BY USING ETAP

SHORT CIRCUIT ANALYSIS OF 220/132 KV SUBSTATION BY USING ETAP SHORT CIRCUIT ANALYSIS OF 220/132 KV SUBSTATION BY USING ETAP Kiran V. Natkar 1, Naveen Kumar 2 1 Student, M.E., Electrical Power System, MSS CET/ Dr. B.A.M. University, (India) 2 Electrical Power System,

More information

PREFACE ********************************************************** IT IS NOT INTENDED THAT THESE STANDARDS BE COPIED AND USED AS A SPECIFICATION!

PREFACE ********************************************************** IT IS NOT INTENDED THAT THESE STANDARDS BE COPIED AND USED AS A SPECIFICATION! PREFACE This publication has been prepared as a guide for Architectural and Engineering (A&E) firms in the preparation of documents for the design and construction of new structures and the remodeling

More information

Notes 1: Introduction to Distribution Systems

Notes 1: Introduction to Distribution Systems Notes 1: Introduction to Distribution Systems 1.0 Introduction Power systems are comprised of 3 basic electrical subsystems. Generation subsystem Transmission subsystem Distribution subsystem The subtransmission

More information

A Guide to Establish an Arc Flash Safety Program for Electric Utilities

A Guide to Establish an Arc Flash Safety Program for Electric Utilities A Guide to Establish an Arc Flash Safety Program for Electric Utilities by Craig Clarke, P.E. Eaton Corporation 50 Soccer Park Rd. Fenton, MO 63026 (636) 717-3406 CraigClarke@Eaton.com Ilanchezhian Balasubramanian,

More information

Addendum to Instructions for Installation, Operation and Maintenance of Digitrip 3000 Protective Relays

Addendum to Instructions for Installation, Operation and Maintenance of Digitrip 3000 Protective Relays Dual-Source Power Supply Addendum to I.B. 17555 Addendum to Instructions for Installation, Operation and Maintenance of Digitrip 3000 Protective Relays Table of Contents Page 1.0 Introduction...1 2.0 General

More information

Generator Protection GENERATOR CONTROL AND PROTECTION

Generator Protection GENERATOR CONTROL AND PROTECTION Generator Protection Generator Protection Introduction Device Numbers Symmetrical Components Fault Current Behavior Generator Grounding Stator Phase Fault (87G) Field Ground Fault (64F) Stator Ground Fault

More information

APPLICATION: The heart of the system is a DSR 100 Digital Static Regulator used in conjunction with standard SCR based rectifier bridges.

APPLICATION: The heart of the system is a DSR 100 Digital Static Regulator used in conjunction with standard SCR based rectifier bridges. APPLICATION: Basler Electric offers a New Line of digitally controlled brush (static) or brushless excitation systems designed for use with existing Hydro, Gas as well as Diesel driven generators requiring

More information

Mica Element Support High Current Interruption Element. Welded Element Joints

Mica Element Support High Current Interruption Element. Welded Element Joints Construction A 3/8-16 UNC 2B Thd..75 Deep 1.00 (25.4) Brass Caps Low Current Interruption Element (Includes Patented Damage Sensor Resin-Rich Filament Wound Glass/Epoxy Body Length B C Compacted Quartz

More information

APPENDIX A MATLAB CODE FOR CALCULATION OF MOTOR TORQUE

APPENDIX A MATLAB CODE FOR CALCULATION OF MOTOR TORQUE APPENDIX A MATLAB CODE FOR CALCULATION OF MOTOR TORQUE Table 1 MATLAB code for calculating motor torque[1] %Definition of Motor Parameters V=4000/sqrt(3); %Phase voltage NoPh=3; %Number of Phase NoPo=2

More information

Relion 605 series. Self-Powered Feeder Protection REJ603 Application manual

Relion 605 series. Self-Powered Feeder Protection REJ603 Application manual Relion 605 series Relion 605 series Relion 605 series Self-Powered Feeder Protection REJ603 Application manual Document ID: 1MDU07206-YN 6 2 4 This document and parts thereof must not be reproduced or

More information

Module 10. Initiation Code RELIABILITY ACCOUNTABILITY

Module 10. Initiation Code RELIABILITY ACCOUNTABILITY Module 10 Initiation Code 1 M10 Initiation Code This is not the Initiating cause code The Outage Initiation Codes describe where an Automatic Outage was initiated on the power system. Element-Initiated

More information

Electrical Measurement Safety. Sponsored By:

Electrical Measurement Safety. Sponsored By: Electrical Measurement Safety Sponsored By: About the Viewer Panel Slides: Go to the Links tab at the top and click on the link to download the PDF of the slides If you re watching the archive version,

More information

7. INSPECTION AND TEST PROCEDURES

7. INSPECTION AND TEST PROCEDURES 7.1 Switchgear and Switchboard Assemblies A. Visual and Mechanical Inspection 1. Compare equipment nameplate data with drawings and specifications. 2. Inspect physical and mechanical condition. 3. Inspect

More information

MV ELECTRICAL TRANSMISSION DESIGN AND CONSTRUCTION STANDARD. PART 1: GENERAL 1.01 Transformer

MV ELECTRICAL TRANSMISSION DESIGN AND CONSTRUCTION STANDARD. PART 1: GENERAL 1.01 Transformer PART 1: GENERAL 1.01 Transformer A. This section includes liquid filled, pad mounted distribution transformers with primary voltage of 12kV or 4.16kV (The University will determine primary voltage), with

More information

CHAPTER 2 ELECTRICAL POWER SYSTEM OVERCURRENTS

CHAPTER 2 ELECTRICAL POWER SYSTEM OVERCURRENTS CHAPTER 2 ELECTRICAL POWER SYSTEM OVERCURRENTS 2-1. General but less than locked-rotor amperes and flows only Electrical power systems must be designed to serve in the normal circuit path. a variety of

More information

How to maximize reliability using an alternative distribution system for critical loads

How to maximize reliability using an alternative distribution system for critical loads White Paper WP024001EN How to maximize reliability using an alternative distribution system for critical loads Executive summary The electric power industry has several different distribution topologies

More information

Protection Basics Presented by John S. Levine, P.E. Levine Lectronics and Lectric, Inc GE Consumer & Industrial Multilin

Protection Basics Presented by John S. Levine, P.E. Levine Lectronics and Lectric, Inc GE Consumer & Industrial Multilin Protection Basics Presented by John S. Levine, P.E. Levine Lectronics and Lectric, Inc. 770 565-1556 John@L-3.com 1 Protection Fundamentals By John Levine 2 Introductions Tools Outline Enervista Launchpad

More information

IDAHO PURPA GENERATOR INTERCONNECTION REQUEST (Application Form)

IDAHO PURPA GENERATOR INTERCONNECTION REQUEST (Application Form) IDAHO PURPA GENERATOR INTERCONNECTION REQUEST (Application Form) Transmission Provider: IDAHO POWER COMPANY Designated Contact Person: Jeremiah Creason Address: 1221 W. Idaho Street, Boise ID 83702 Telephone

More information

WAVEFORM CORRECTOR (WAVEFORM CORRECTORS) REPLACES SURGE PROTECTION DEVICES (SPD) PREVIOUSLY KNOWN AS (TVSS)

WAVEFORM CORRECTOR (WAVEFORM CORRECTORS) REPLACES SURGE PROTECTION DEVICES (SPD) PREVIOUSLY KNOWN AS (TVSS) WAVEFORM CORRECTOR (WAVEFORM CORRECTORS) REPLACES SURGE PROTECTION DEVICES (SPD) PREVIOUSLY KNOWN AS (TVSS) 1 PART 1: GENERAL This section describes materials and installation requirements for low voltage

More information

Electrical Systems - Course 135 COMPOSITE ELECTRICAL PROTECTIVE SCHEMES: PART I

Electrical Systems - Course 135 COMPOSITE ELECTRICAL PROTECTIVE SCHEMES: PART I Electrical Systems - Course 135 COMPOSTE ELECTRCAL PROTECTVE SCHEMES: PART BUSES AND TRANSFORMERS L.0 ntroducton Following on from lesson 135.03-1, this lesson shows componte protective schemes for buses

More information

Distribution System Development & Preliminary Studies

Distribution System Development & Preliminary Studies Distribution System Development & Preliminary Studies IEEE CED January 27, 2016 (second night) 2016 KBR, Inc. All Rights Reserved. Agenda Distribution System Development Modeling Data Studies Overview

More information

high RESISTANCE GROUNDING SYSTEM the power to protect www. ElectricalPartManuals. com Instruction Manual C-102

high RESISTANCE GROUNDING SYSTEM the power to protect www. ElectricalPartManuals. com Instruction Manual C-102 G e m i n i high RESISTANCE GROUNDING SYSTEM the power to protect Instruction Manual C-102 HIGH RESISTANCE GROUNDING SYSTEM Gemini is a unique, fail safe, all-in-one neutral grounding system, combining

More information

EELE 354 Lab Assignment 5: Fuse and Ground Fault Current Interrupter (GFCI) Operation

EELE 354 Lab Assignment 5: Fuse and Ground Fault Current Interrupter (GFCI) Operation EELE 354 Lab Assignment 5: Fuse and Ground Fault Current Interrupter (GFCI) Operation EELE 354 Lab Assignment 5 1 Lab Overview: In electrical circuits, it is often necessary (either through code or just

More information

STRAY FLUX AND ITS INFLUENCE ON PROTECTION RELAYS

STRAY FLUX AND ITS INFLUENCE ON PROTECTION RELAYS 1 STRAY FLUX AND ITS INFLUENCE ON PROTECTION RELAYS Z. GAJIĆ S. HOLST D. BONMANN D. BAARS ABB AB, SA Products ABB AB, SA Products ABB AG, Transformers ELEQ bv Sweden Sweden Germany Netherlands zoran.gajic@se.abb.com

More information

NERC Protection Coordination Webinar Series June 16, Phil Tatro Jon Gardell

NERC Protection Coordination Webinar Series June 16, Phil Tatro Jon Gardell Power Plant and Transmission System Protection Coordination Phase Distance (21) and Voltage-Controlled or Voltage-Restrained Overcurrent Protection (51V) NERC Protection Coordination Webinar Series June

More information

The NOVA Recloser shall be designed and tested in accordance with the following standards as applicable:

The NOVA Recloser shall be designed and tested in accordance with the following standards as applicable: Reclosers NOVA Three-Phase Recloser Functional Specification Guide Functional specification for NOVA three-phase recloser 1. Scope This specification describes the features and ratings of the NOVA recloser.

More information

IC800SSD Hardware Manual Pub 348R5. for models. A publication of

IC800SSD Hardware Manual Pub 348R5. for models. A publication of IC800SSD Hardware Manual Pub 348R5 for models IC800SSD104S1A IC800SSD104RS1A IC800SSD107S1A IC800SSD107RS1A IC800SSD407RS1A IC800SSD216S1A IC800SSD216RS1A IC800SSD420RS1A IC800SSD228S1A IC800SSD228RS1A

More information

A Tutorial on the Application and Setting of Collector Feeder Overcurrent Relays at Wind Electric Plants

A Tutorial on the Application and Setting of Collector Feeder Overcurrent Relays at Wind Electric Plants A Tutorial on the Application and Setting of Collector Feeder Overcurrent Relays at Wind Electric Plants Martin Best and Stephanie Mercer, UC Synergetic, LLC Abstract Wind generating plants employ several

More information

The Importance of the Neutral-Grounding Resistor. Presented by: Jeff Glenney, P.Eng. and Don Selkirk, E.I.T.

The Importance of the Neutral-Grounding Resistor. Presented by: Jeff Glenney, P.Eng. and Don Selkirk, E.I.T. The Importance of the Neutral-Grounding Resistor Presented by: Jeff Glenney, P.Eng. and Don Selkirk, E.I.T. Presentation Preview What is high-resistance grounding (HRG)? What is the purpose of HRG? Why

More information

ENGINEERING DATA SUBMITTAL For the Interconnection of Generation System

ENGINEERING DATA SUBMITTAL For the Interconnection of Generation System WHO SHOULD FILE THIS SUBMITTAL: Anyone in the final stages of interconnecting a Generation System with Nodak Electric Cooperative, Inc. This submittal shall be completed and provided to Nodak Electric

More information

Education & Training

Education & Training Distribution System Operator Certificate This program provides you with a proficient working knowledge in modern electric power distribution systems. These four classes are designed to walk students through

More information

Transformer Protection

Transformer Protection Transformer Protection Transformer Protection Outline Fuses Protection Example Overcurrent Protection Differential Relaying Current Matching Phase Shift Compensation Tap Changing Under Load Magnetizing

More information

EARTH FAULT PROTECTION VIS-A-VIS GENERATOR GROUNDING SYSTEM

EARTH FAULT PROTECTION VIS-A-VIS GENERATOR GROUNDING SYSTEM EARTH FAULT PROTECTION VIS-A-VIS GENERATOR GROUNDING SYSTEM BY MR. H. C. MEHTA AT 1 ST INDIA DOBLE PROTECTION AND AUTOMATION CONFERENCE, NOV 2008 POWER-LINKER Wisdom is not Virtue but Necessity hcmehta@powerlinker.org

More information

NOVEL PROTECTION SYSTEMS FOR ARC FURNACE TRANSFORMERS

NOVEL PROTECTION SYSTEMS FOR ARC FURNACE TRANSFORMERS NOVEL PROTECTION SYSTEMS FOR ARC FURNACE TRANSFORMERS Ljubomir KOJOVIC Cooper Power Systems - U.S.A. Lkojovic@cooperpower.com INTRODUCTION In steel facilities that use Electric Arc Furnaces (EAFs) to manufacture

More information

2014 NEC Changes Part 1

2014 NEC Changes Part 1 www.garyklinka.com Page 1 of 8 Instructions: Fee $20 1. Print these pages. 2. Circle the correct answers and transfer them to the answer sheet. 3. Page down to the last page for the verification forms

More information

high RESISTANCE GROUNDING SYSTEM the power to protect SLEUTH Instruction Manual C-408EM

high RESISTANCE GROUNDING SYSTEM the power to protect SLEUTH Instruction Manual C-408EM SLEUTH high RESISTANCE GROUNDING SYSTEM SLEUTH the power to protect Instruction Manual C-408EM HIGH RESISTANCE GROUNDING Sleuth Protecting your equipment and processes from damaging ground faults, a resistor

More information

Phase and neutral overcurrent protection

Phase and neutral overcurrent protection Phase and neutral overcurrent protection Page 1 ssued June 1999 Changed since July 1998 Data subject to change without notice (SE970165) Features Two-phase or three-phase time-overcurrent and earth fault

More information

1 INTRODUCTION 1.1 PRODUCT DESCRIPTION

1 INTRODUCTION 1.1 PRODUCT DESCRIPTION GEK-00682D INTRODUCTION INTRODUCTION. PRODUCT DESCRIPTION The MDP Digital Time Overcurrent Relay is a digital, microprocessor based, nondirectional overcurrent relay that protects against phase-to-phase

More information