Who is Luse Thermal Technologies?Luse Companies started 1923. 4th generation is actively running the companyOur Primary Utility Services Include:Substation , Fossil, & Nuclear FirestoppingTransformer ProtectionPower Plant Heat Rate Recovery RepairsNuclear Mech. InsulationNuclear & Fossil Abatement
The Live Electric and Substation Environment WHY IS LTT QUALIFIED TO WORK IN YOUR FACILITY?LTT has installed fire protection in over 230 energizedsubstations during the past three years, withoutaccidents, injuries, or lost time incidents. Customersinclude ComEd, PG&E, PECO, DTE, Beta Steel, &Ameren to name a few. SAFETY IS LTT’s FIRST PRIORITY
FIRE: The uninvited guest to the dance of electrons PLANNING FOR FIRE EVENTS Proactive decisions help ensure the electrons keep flowing: ▪ Install fire protection enhancements. ▪ Learn from root cause lessons of others: When new cable is pulled, restore the fire protection system, (i.e., rebuild penetration seal). Plan for the restoration of fire protection items and schedule time for their repair, not just time to pull the new cable. Implement a periodic fire protection inspection program.
Planning For Fire Events FIRE: The uninvited guest to the dance of electronsUtilities are undertaking a proactive campaign to help ensure theelectrons keep flowing. Some first steps to take are: ▪ Learn from root cause lessons and review industry practices ▪ Implement a multi-year fire protection program Passive Fire Protection Fire Plans and Fire Department Training Detection Suppression
Planning For Fire EventsEvents Planning For Fire FIRE: The uninvited guest to the dance of electrons
LTT FortiFire® System restores Barrier Compartment SWITCHGEAR ROOM SUB-STATION BASEMENT LTT PROVIDES FIRE FIRE PROTECTION ENHANCEMENTS COMPARTMENTS HELP KEEP FIRE IN ROOM OF ORIGIN
Substations with Cable Space Areas Station Battery 12kV Circuit Breakers (DC Control Power) Cable 12kV Bus Space Hatch Grade Control Wire Cable Duct ToCable 12kV Power Cables in streetDuct Cable Space Tostreet
Dealing With ChallengesEnvironments can be challenging
Creative Problem Solving THE FIRE DOOR HAD A HOLE IN ITSome field conditions go beyond unique. This door opening was sealed with acombination of firestop materials restrained by steel plate (painted yellow) anddoor frame.The door closes against this seal assembly, providing an enhanced level offire resistance for this untested configuration.
The Live Substation Environment SAFETY IS BUILT INTO LTT WORK PROCESS Job Brief / Safety meeting 2 times a day Perform "lessons learned" job critique at end of shift Underground Electrician can be part of work crew if required Field survey spots unique design conditions prior to arrival of work crew Hazards identified before the work starts Use of designs and procedures, validated by years of hands-on experience LTT staff certifications include: OSHA 30 OSHA 1910.269 OSHA 1910.331-335 NFPA 70E Confined Space Entry CPR / First Aid
Stop - Think - Act - ReviewWORK SAFE AND SMARTRespect Equipment Zones
PENETRATION SEALS ARE THE LAST LINE OF DEFENSE IN A FIRE
Recognizing Fire Barrier Deficiencies THE DEGRADED FIRESTOP PROBLEM Problems:Sealant degradation Unqualified or missing penetration seals (firestops) degrade the fire rating of the floor separating the switchgear room from the basement. Examples of degraded fireNo seal installed barriers can allow passage of fire and smoke through the floor openings, creating problems for the operation of switchgear and/or the total loss of sub-station.Unqualified design Smoke can travel up to 420 feet per minute, making containment essential.Combustible material
New Penetration Seal Design Drawing Format LTT Firestop Instruction LTT ENHANCED FortiFire® DRAWINGS POWER CABLES THROUGH OPENING IN CONCRETE ON PAN DECKPHOTO OF EXAMPLE OPENING: SEAL FROM ABOVE AND BELOW FLOOR FIRE RATING: 3-HOURS Photographs are used to describe SMOKE SEAL: YES BARRIER TYPE: BARRIER LINING: CONCRETE ON PAN DECK CONCRETE W/ BEVELED EDGE field conditions, helping personnel to choose correct firestop design for the BARRIER THICKNESS: 7 INCH MINIMUM OPENING SIZE: ≤ 40 INCH X 30 INCH ABOVE OPENING: OPEN (NO CABINET) ANNULAR SPACE: PENETRANT(S): MINIMUM - 6" MAXIMUM - 20" specific field situation. THREE 69KV POWER CABLESPLACEMENT OF SEALANT MATERIALS: INSTALLATION INSTRUCTIONS: New installation directions are based 18 GAUGE SHEET METAL PLATE CUT SHEET METAL SO IT OVERLAPS ONTO PAN DECK A MINIMUM OF 2" AND STAYS AWAY FROM upon installing sealant from CABLE 2-1/2". USE 3/16" CONCRETE SCREW WITH 1-1/2" STEEL WASHER TO FASTEN PLATE(S). ONE FASTENER EVERY 8 INCHES. underneath the floor. MINERAL WOOL (4 PCF DENSITY) (2" THICK) PLACE MINERAL WOOL ON TOP OF SHEET METAL, MAKING SURE CABLES ARE ENCAPSULATED. FILL ENTIRE AREA OF OPENING WITH MINERAL WOOL. HILTI FS657 FIRE BLOCKS INSERT FIRE BLOCKS INTO FLOOR OPENING. Design limitations have been expanded by sealant manufacturer to USE 8" LENGTH AND COMPRESS BLOCK IN PLACE THE BOTTOM OF BLOCK SHOULD REST ON TOP OF MINERAL WOOL. NOTE: STAGGER FIRE BLOCK INSTALLATION (IE BRICK WALL). ACCURATE CUTTING OF THE FIRE BLOCK IS NECESSARY TO FIRMLY ABUT OPENING AND CABLES. CUT BLOCKS SO GAPS BETWEEN BLOCKS, encompass expected field conditions. CABLES AND OPENING ARE SMALL AS POSSIBLE. HILTI FS-ONE CAULK INSTALL CAULK INTO ALL GAPS BETWEEN CABLES AND CABLES CABLES AND FIRE BLOCKS CABLES AND OPENING FIRE BLOCKS AND FIRE BLOCKS FIRE BLOCKS AND OPENING INSTALL CAULK TO THE MAXIMUM EXTENT POSSIBLE .Based on Hilti Engineering Judgment xxxx DESIGN PD - 2
The Substation Basement UTILIZE NEW FIRESTOP DESIGNS Installation of firestopping in substation floor (ceiling of basement) to maintain the fire rating of the floor slab. Firestopping work performed from underneath the floor. Custom LTT/Manufacturer Firestop Designs Trained Installation Personnel Working safely is our first stepExample basement and fire barrier penetration seals
Testing is foundation of Penetration Seals TESTING FIRESTOPS Firestops are tested to ASTM standard E814. Test calls for temperatures of 1,000° F in first five minutes of test, climbing to 1,925° F at three hours. Cold side temperatures are monitored during test. Test slab being removed from furnace. Notethat cable bundle in center has burned through. After fire exposure, the test slab and seals are subjected to a powerful hose stream blast.
PENETRATIONSEALS Preview of Common Installation COLLAR HANGING ON SIDE OF CABLE TRAY IDENTIFIES CABLE LOADING WHERE A COLLAR WILL BE INSTALLED
PENETRATION SEALS Four Steps of Collar installation 1st step INSTALL FIRE BLOCKS/PILLOWS Three power cables penetrating hollow core floor, as shown below.Install Fire Blocks/Pillows into opening, so8" depth of goes through floor.Top of Fire Block/Pillow should reach upperportion of opening (area above hollow core).
PENETRATION SEALS Four Steps of Collar installation 2nd step INSTALL PREMIUM FIRESTOP CAULK Three power cables penetrating hollow core floor, as shown below.Install Caulk into allgaps between: cables and cables cables and fire blocks cables and opening blocks/pillows and blocks/pillows blocks/pillows and opening
PENETRATIONSEALS Four Steps of Collar installation 3rd step INSTALL FIRESTOP COLLAR Three power cables penetrating hollow core floor, as shown below. Install Firestop Collar
PENETRATIONSEALS Firestop Collars FASTENING COLLARS TO BARRIER Collars are connected to concrete barriers with concrete screws and washers. The fasteners should be evenly spaced around the collar. Approved sizes of fasteners and washers: 3/16 X 1-1/4 CONCRETE SCREW WITH 3/4" WASHER 1/4 X 1-1/4 CONCRETE SCREW WITH 3/4" WASHER LARGER SIZE WASHERS ARE ALSO ACCEPTABLE
PENETRATIONSEALS Four Steps of Collar installation 4th step CAULK INSIDE OF COLLAR Three power cables penetrating hollow core floor, as shown below.Install Caulk inside ofCollar
Large Openings are easily addressed with Hilti Firestop Materials FIRE BLOCKS/PILLOWS ARE BUILT TO PROVIDE FUNCTIONING INSTALLATIONS IN DIFFICULT ENVIRONMENTS 36" x 48" opening. White spots are concrete dust from drilling holes for 72" x 48" opening, prior to wire mechanical fasteners. mesh installation.
Problem Solving SEPARATING THE STAIRWAY FROM ELECTRICAL HAZARDSLTT constructed 2-hour fire rated walls around stairways, providing a safe havenand exit path for this building.This work included a 90° rotation of existing stairs to allow the construction of thenew wall in a congested area.LTT invites the opportunity to help solve problems in your facility.
Problem Solving DEALING WITH CHALLENGESProblem solving is part of LTT’s scope
Cable Splices FIRE CAUSED BY CABLE JOINT FAILUREProblem:Cable connections (joints / splices)have overheated and exploded.Loss:Fire and molten metal from cablefault knocked out adjacent cables,shutting down other power and CABLEcontrol circuits. JOINTS Circle shows area of previous joint failure. White material shows partial coverage of new EP3990 Wrap to protect adjacent cables.
Cable Splices POWER CABLE WRAP SOLUTION The Power Cable Wrap solution involves wrapping the joint (plus one foot on each side) and the adjacent cables above and below the joint. Upon exposure to fire, EP3990CABLE Wrap forms a char layer (similar toJOINTS ceramic cell structure) which helps protect the underlying cable. This wrap is not designed to contain an arc blast.
Protect the Control CablesBURNING POWER CABLES THREATEN CONTROL CABLES Control Cables Power Cables Problem: Burning power cables have damaged control cables routed above power cables, degrading ability to operate station.
Protect the Control Cables EACH SUBSTATION IS DIFFERENT When burning power cables are envisioned,the hot gasses will rise and then bedeflected by the FB3600-UT Silica Cloth.This installation prevents the cable tray fromacting like a large frying pan, where thecontrol cables are cooked.Talk about cooking!This hanging pile of spaghetti will take somethought to come up with an appropriatemethod of protection.
Protect the Control Cables CONTROL CABLE PROTECTION The FB3600-UT high temperature fabric provides thermal protection for control cables inside of cable tray. Air gap between fabric and cable tray shields cables from direct flame exposure. Cable drops / cableCABLEDROP bundles are individually covered. CONTROL CABLE PROTECTION
Protecting back-up Power SOLUTION: RADIANT ENERGY SHIELDOpen hatch in process of having Closed hatch with radiant heat shield.radiant heat shield fastened tosteel plate.
HATCH PROTECTION Hatch Protection ACCESS HATCHES ARE DIFFERENT STYLES The size and shape of access hatches varies. A single pattern does not cover each type of hatch.
Hatch Protection MAY USE MULTIPLE PIECES OF BOARD1 Multiple pieces of Firestop Board may be needed to cover the underside of a hatch. Due to obstructions (opening handle, hinge, hand holds, safety barrier hinge, etc.) the entire hatch will not be completely covered.2 Only portions of this example have wrap strip installed, because steel strengthening of hatch creates two compartments.3 4 5
Transformer Cable Drop Penetrations OIL INTRUSION PROTECTION Open cable penetrations below the transformer "dog house“ can provide a path for oil, water and fire to enter the substation basement. The sealants LTT uses to seal these openings are designed to resist oil, water and fire. Several solutions are available:
Cable Trough Water Mitigation Sealing THE NEED TO SEAL CABLE TROUGH Water inside of cable trough, moving toward opening in substation basement wall. Water cascading into basement and cable tray. Wooden board will stop a large rodent, but not water or oil.
Cable Trough Water Mitigation Sealing THE CABLE TROUGH SOLUTION This cable trough allowed rainwater to enter substation basement on regular basis. Shows installation of perforated PVC pipe embedded in grout dam. The drain pipe connects to station sump pump. Urethane foam was placed on top of grout. The foam allows for future cable pulling with no damage to grout dam. Side walls of trough show marks from “river” of water that flowed into substation basement.
Cable Trough Oil Mitigation SealingThe yellow arrows track the In the event of transformer rupture,potential path of oil that can the cable trough provides a path fordrain into the trough and then burning oil to enter the substationflow into the substation cable basement.space. As of 10.12.12, no products or engineered systems reviewed have been able to 100% resolve the burning oil problem while allowing for ease of cable removal & replacement.
Oil Filled Equipment Hazard Within 10 feet of Building OIL INTRUSION PROTECTION Auxiliary transformers often contain oil. During an abnormal event, oil can flow down conduits and enter the substation basement. Sealing these conduits to prevent burning oil from entering the cable space is a prudent action. Aftermath of auxiliary transformer event that propagated fire into substation basement. Oil leaked into basement following embedded conduits in concrete slab.
Oil Filled Equipment HazardSWITCHGEAR ROOM OIL INTRUSION PROTECTION AUXILIARY TRANSFORMER OR OIL FILLED EQUIPMENTSUBSTATION BASEMENT AUX POWER CABLES L EA LS AL IO RW ER EXT EXTERIOR WALL SEALS NEED TO BE OIL, WATER AND FIRE RESISTANT BELOW GRADE EXTERIOR WALL SEALS
New Compartments in Power Station TunnelsELECTRIC POWER STATIONS LTT Installs Fire Protection in live 138,000 volt environment
New Compartments in Power Station Tunnels FIRE AND PRESSURE RESISTANT SEALS Silicone Elastomer used to seal 138 kV Cables in new fire walls. 3-hour fire rating. Silicone elastomer provides considerable pressure resistance. SILICONE ELASTOMER SEALSilicone elastomer penetration seals were originally used innuclear plants. Project engineer specified the technology inthis T&D application, due to robust nature of seal design.
New Compartments in Power Station Tunnels FIRE AND PRESSURE RESISTANT SEALS Flexible boot seals allow for pipe movement. 3-hour fire rating. Flexible boot seals provide FLEXIBLE BOOT SEAL considerable pressure resistance. Flexible boot penetration seals were also used in nuclear plants
Weather Protection PREVENTING WATER LEAKAGE Silicone Sheet and Caulk provide leakage protection in concrete roof. Weatherproof seals cover fire rated sealants installed in plane of floor. Silicone materials provide excellent UV protection.Weather seals encapsulate 69 kVpower cables as they penetrateconcrete deck. Multiple electrical conduits penetrate slab
Structural Steel FireproofingMINERAL WOOL FIREPROOFING Mineral wool board fireproofingeliminates adhesion problems commonto spray applied fireproofing. "Dry" material is easily installed inretrofit applications.STEEL TRUSS IN PROCESS OFBEING COVERED
Fire Protection for New Sub-stations PASSIVE FIRE PROTECTION LTT personnel have decades of fire protection installation and management experience ELECTRICAL LTT has a quality program TRANSFORMER LTT has an excellent safety record T LT LTT can meet your schedule345 kV SWITCHGEAR BEFORE AFTER
Review of LTT Utility Services WHAT CAN LTT DO FOR YOUR UTILITY ?1. Firestopping of Live Cable Penetrations2. Power Cable Joint Protection (EP3990 Wrap)3. Control Cable Protection (FB3600-UT Cloth)4. Hatch Cover Protection (radiant energy shields)5. Transformer Cable Drop Penetrations6. Cable Trough Sealing7. Oil Filled Equipment Protection8. Silicone Elastomer Penetration Seals9. Flexible Boot Penetration Seals10. Weather Protection11. Transformer Failure Shield12. Specification, Procedure and Drawing Preparation13. Field Survey and Status Assessment14. Structural Steel Fireproofing15. General and Task Specific Training16. Fire Barrier Construction & Problem Solving17. Provide TurnKey install package or Certified Training of your personnel or contractor of choice.
LUSE THERMAL TECHNOLOGIESTHANK YOU FOR YOUR TIME !
Your information requests receive our highest priority! ASSET PROTECTION ENHANCEMENTS HERE TO HELPJim FordCell: 630.240.6381Email: firstname.lastname@example.orgJohn ProvencherCell: 708.363.3838Email: email@example.com