1. Safe work practices such as risk assessment and permitting are required to safely isolate circuits before working on electrical systems. The electrician must be qualified and take precautions to prevent hazards.
2. When finding a fault, the electrician should explain to the client what needs to be isolated and the estimated time, then explain how the fault will be fixed once found.
3. The client should be informed of any circuit issues in a clear manner, treated with respect to maintain good relations, and given accurate information to avoid wasted costs or false beliefs about the electrician's abilities.
Metrohm MET7A501C Safety Insulation Tester
LV HV Electrical Testing
Electrical Safety Testing In Hazardous Areas
Martindale Electric Flash Testers & Insulation Testers
Martindale Electric Metrohm MET7A501C Safety Insulation Tester Description
Martindale Electric Metrohm MET7A501C Safety Insulation Tester was originally designed for use in hazardous areas, such as mines and petrol sites. However, due to the new ATEX regulations, the device no longer meets the requirements for intrinsically safe products - BUT this product has been in active service for 45 years in hazardous areas, in the presence of methane, ammonia and hydrocarbons.
The Metrohn MET7A501C is a one of a kind tester and fully meets the ATEX requirements, therefore the use of this tester should be decided upon by a suitably qualified and knowledgeable person. Whilst the MET7A501C safety insuation tester does not qualify for ATEX approval, safety officers should evaluate the risks of failing to perform adequate electrical safety testing.
Martindale Electric Metrohm MET7A501C Safety Insulation Tester Specifications
Insulation Range: 0 - 50MΩ
Test Voltage: 500V DC +/- 10% across 1MΩ
Short Circuit Current: <2ma><26mA
Continuity Accuracy: +/- 1.6mm of scale arc length
Complies With: BS1259
Supply: 1.5V AA IEC batteries
Housing: Shatterproof ABS case
Dimensions: 32 x 82 x 60mm
Weight: 600g approx
Operating Temperature: 0 to 40°C
Storage Temperature: -20°C to 60°C
Martindale Electric Metrohm MET7A501C Safety Insulation Tester Contents
Case, test leads (DFK0113)
Safety tool to remove battery cover
Instruction manual
Thorne & Derrick UK are official distributors of the SebaKMT range of LV-HV Cable Fault Location instruments including cable sheath testers and cable sheath fault prelocation and pinpointing units. SebaKMT are the leading manufacturer of measurement equipment for the diagnosis of cable networks and for cable fault location. Cable faults are the ''natural enemy'' of reliability. The innovative SebaKMT products make it possible to quickly localise low and high voltage cable faults without causing damage to fault-free parts of the cable.
Metrohm MET7A501C Safety Insulation Tester
LV HV Electrical Testing
Electrical Safety Testing In Hazardous Areas
Martindale Electric Flash Testers & Insulation Testers
Martindale Electric Metrohm MET7A501C Safety Insulation Tester Description
Martindale Electric Metrohm MET7A501C Safety Insulation Tester was originally designed for use in hazardous areas, such as mines and petrol sites. However, due to the new ATEX regulations, the device no longer meets the requirements for intrinsically safe products - BUT this product has been in active service for 45 years in hazardous areas, in the presence of methane, ammonia and hydrocarbons.
The Metrohn MET7A501C is a one of a kind tester and fully meets the ATEX requirements, therefore the use of this tester should be decided upon by a suitably qualified and knowledgeable person. Whilst the MET7A501C safety insuation tester does not qualify for ATEX approval, safety officers should evaluate the risks of failing to perform adequate electrical safety testing.
Martindale Electric Metrohm MET7A501C Safety Insulation Tester Specifications
Insulation Range: 0 - 50MΩ
Test Voltage: 500V DC +/- 10% across 1MΩ
Short Circuit Current: <2ma><26mA
Continuity Accuracy: +/- 1.6mm of scale arc length
Complies With: BS1259
Supply: 1.5V AA IEC batteries
Housing: Shatterproof ABS case
Dimensions: 32 x 82 x 60mm
Weight: 600g approx
Operating Temperature: 0 to 40°C
Storage Temperature: -20°C to 60°C
Martindale Electric Metrohm MET7A501C Safety Insulation Tester Contents
Case, test leads (DFK0113)
Safety tool to remove battery cover
Instruction manual
Thorne & Derrick UK are official distributors of the SebaKMT range of LV-HV Cable Fault Location instruments including cable sheath testers and cable sheath fault prelocation and pinpointing units. SebaKMT are the leading manufacturer of measurement equipment for the diagnosis of cable networks and for cable fault location. Cable faults are the ''natural enemy'' of reliability. The innovative SebaKMT products make it possible to quickly localise low and high voltage cable faults without causing damage to fault-free parts of the cable.
Seaward has over 70 years experience in the design manufacture of market-leading electrical test equipment. Seaward’s unrivalled range of electrical test equipment serves a wide variety of safety testing and precision measurement applications. For 25 years Seaward has been developing market-defining portable appliance testers, software and accessories for the PAT testing market.
The Cropico and Clare ranges of precision instruments and industrial electrical test equipment bolster Seaward’s product offering and demonstrate the result of 70 years of technical expertise across a number of industries including manufacturing, utilities and aerospace.
The all-inclusive Seaward electrical test equipment range now encompasses:
PAT Testing
Installation Testing
Electrical Test Tools
High Voltage Testing
Industrial Testing and Measurement
Micro Ohmmeters
Hipot Testers
Resistance Standards
Decade Boxes
SEBA KMT MFM5-1 is the universal test instrument for cable sheath testing including prelocation and pinpointing of cable sheath faults - in sheath testing mode SEBA KMT MFM5-1 can detect minute cable sheath insulation damage on low and high voltage cable networks.
SEBA KMT MFM5-1 ensures fast and precise cable sheath fault location - the instrument is menu-driven and fully automatic sheath fault prelocation is accurately achieved by inputting total cable length. SEBA KMT ESG 80-2 can be combined with the MFM5-1 for earth fault location in LV-HV cables.
Cable Sheath Test & Fault Location SEBA KMT MFM5-1 Features : Sheath testing, fault prelocation and pinpointing combined in single unit, sheath testing up to 5kV, time saving prelocation of sheath fault.
Surge generator cable fault locators ("thumpers") provide pre-location and pinpoint cable fault location. Cable fault prelocation using ICE (Impulse Current Method) is preferred for extensive underground cable fault location and pinpointing cable faults in water damaged cable joints. Precise location of cable faults through surge generator fault locators (cable thumping) is very quick and limits expensive excavation by pinpoint accuracy.
D-SENSE
The accuracy of its performance parameters related to the safety of patients, must be through the corresponding detection equipment AED production of the performance parameters of the test and regular performance check.
Meditech D-Sense automated external defibrillator analyzer can simulate a variety of normal and abnormal ECG signals for defibrillator testing, test the ability of the defibrillator to analyze ECG signals, and display the defibrillator primary discharge energy and energy via the LED digital tube Discharge voltage values, the selection of ECG signals for different tests, and the display of voltage display or primary discharge energy are achieved by key operation. The overall operation of the instrument is simple and convenient.
Electrical test and measurement range of products from Josts ensures performance & reliability in power generation, transmission & distribution equipments
The TS100 Cable Fault Finder is the easy to use, competitively priced cable management solution that saves time and money while it simplifies many common tasks.
Seaward has over 70 years experience in the design manufacture of market-leading electrical test equipment. Seaward’s unrivalled range of electrical test equipment serves a wide variety of safety testing and precision measurement applications. For 25 years Seaward has been developing market-defining portable appliance testers, software and accessories for the PAT testing market.
The Cropico and Clare ranges of precision instruments and industrial electrical test equipment bolster Seaward’s product offering and demonstrate the result of 70 years of technical expertise across a number of industries including manufacturing, utilities and aerospace.
The all-inclusive Seaward electrical test equipment range now encompasses:
PAT Testing
Installation Testing
Electrical Test Tools
High Voltage Testing
Industrial Testing and Measurement
Micro Ohmmeters
Hipot Testers
Resistance Standards
Decade Boxes
SEBA KMT MFM5-1 is the universal test instrument for cable sheath testing including prelocation and pinpointing of cable sheath faults - in sheath testing mode SEBA KMT MFM5-1 can detect minute cable sheath insulation damage on low and high voltage cable networks.
SEBA KMT MFM5-1 ensures fast and precise cable sheath fault location - the instrument is menu-driven and fully automatic sheath fault prelocation is accurately achieved by inputting total cable length. SEBA KMT ESG 80-2 can be combined with the MFM5-1 for earth fault location in LV-HV cables.
Cable Sheath Test & Fault Location SEBA KMT MFM5-1 Features : Sheath testing, fault prelocation and pinpointing combined in single unit, sheath testing up to 5kV, time saving prelocation of sheath fault.
Surge generator cable fault locators ("thumpers") provide pre-location and pinpoint cable fault location. Cable fault prelocation using ICE (Impulse Current Method) is preferred for extensive underground cable fault location and pinpointing cable faults in water damaged cable joints. Precise location of cable faults through surge generator fault locators (cable thumping) is very quick and limits expensive excavation by pinpoint accuracy.
D-SENSE
The accuracy of its performance parameters related to the safety of patients, must be through the corresponding detection equipment AED production of the performance parameters of the test and regular performance check.
Meditech D-Sense automated external defibrillator analyzer can simulate a variety of normal and abnormal ECG signals for defibrillator testing, test the ability of the defibrillator to analyze ECG signals, and display the defibrillator primary discharge energy and energy via the LED digital tube Discharge voltage values, the selection of ECG signals for different tests, and the display of voltage display or primary discharge energy are achieved by key operation. The overall operation of the instrument is simple and convenient.
Electrical test and measurement range of products from Josts ensures performance & reliability in power generation, transmission & distribution equipments
The TS100 Cable Fault Finder is the easy to use, competitively priced cable management solution that saves time and money while it simplifies many common tasks.
AutoCAD portfolio:
- studying ,,AutoCAD 2015 and AutoCAD LT 2015 Esentials’’ book from Sybex, Author Scott Onstott
- Level 3 Course in 2D Computer Aided Design, East Berkshire College, UK
- AutoCAD 2015 Essential Training – www.Lynda.com
Electrical safety at work, peace of mind at worksumanlan
Working with electrical equipment poses various forms of danger and can lea d to very grave accidents if safety measures are not taken. These safety measures extend to the staff as well as the quality of the equipment being used
Here is a user guide for one of the screens from Elite
Elite screens are available from Dukane.
Dukane is an American company serving the education, corporate, government and house of worship markets for over 85 years.
For more information contact Dukane AV :
Phone: 800-676-2485
Fax: (630) 584-5156
Email: AVSales@Dukane.com
Website: www.Dukane.com/AV
Dukane AV
2900 Dukane Drive
St. Charles, IL 60174
4. 1. Safe isolationisrequiredtoensure anyone workingonthe circuitsare safe fromelectric
shock.Riskassessmentof the jobshouldbe done toensure all correctpreventionshave
beenputinplace to preventhazards.A permitto workshouldalsobe signedtoensure the
electricianisfullycapableandknowswhats/he knowswhatisneededtobe done ina safe
manner.
2. An agreementof whatneedstobe isolatedwithanestimatedtime itcouldtake.Once the
faultisfoundit shouldbe explainedtothe clientwithinformationonhow youare goingto
fix it.
3.
a. Everythingshouldbe explainedclearlytoensure the clientunderstandswhatis
goingon intheirproperty.
b. You musttreat themrespectivelytoensure youhave ahigherchance of future work
withthese clients.
c. You wantto be accurate toreduce cost of wastedproductsandto ensure youdon’t
give the clientfalse informationwhichcouldmake thembelieve youdon’tactually
knowwhatyou’re doing.✔
4. The clientshouldbe informedwhichcircuithasa problemandthat itneedsisolating.After
isolationthe till canbe placedina temporarylocationsothe store can still trade.(Unless
done duringclosinghours).The areayouare workinginthenneedstobe closedoff fromthe
publicviabarriers.
5. A visual checkonyour consumerunittocheck forany visible loseorworncables.Thenyou
wouldisolate the circuitwithaproblemandthendothe continuityandinsulationresistance
teststo testfor opencircuitandhighresistance withthe low resistance ohmmeterandthen
testfor shortcircuit or lowresistance withaninsulationresistance meter.
6.
a. If the RCBO onlytripswhenthe switchisturnedonthisindicatedthe faultisinthe
switch.Thiscouldbe due to the humidair causingcondensationtogatherinthe
back box causinga short circuitbetweenlineandcpc.
b. If the lightsdon’tturnoff withthe designedswitchthenthiscouldindicate a
possible faultyswitch. Orafaulton the switchwire.✔
7.
a. A highresistance readingcouldmeanthe cable hasn’tbeen tightlyterminated
properlyata socketor the circuitbreaker.
b. A lightningstickcouldcause ahighspike of voltage toflow throughthe circuits.
c. Havingto manyitemspluggedintoaradial circuitwhichtotal to more thanthe
ratingof the cable and circuitbreakercouldcause the circuitto overload.
8.
a. Terminalsmightnotbe tightenedenoughwhichcouldcause eitherahighresistance
or an opencircuitdue to the cablescominglose.
b. If several circuitsare all on at once a highamountof current will be passingthrough
the consumerunit. If the current istoo highforthe mainswitchto handle itwill trip
due to overload.
9.
a. Whenlone workingnoone knowswhere youare and soif you getintotrouble no
one will be able tohelpyou.Forexample fallingfromaladderandsprainingyour
5. ankle. Thiscouldbe preventedbyworkingwithanothercontractoror bytellinga
memberof staff where youare and yourexpectedreturntime.
b. All hazardsshouldbe safelymovedoutthe wayorcoveredand heldbya barrierto
reduce riskto the contractor fromfallingortrip hazards.Personal protective
equipmentshouldalsobe wornforexample hardhatstoreduce injury.
c. Fibre opticcablesshouldonlybe handledwhileusingglovesdue tothe cable being
made of shardsof glass.Alsothe terminatingendmustbe keptawayfromthe eye
due to the laserpossiblydamagingyoureye.
d. Electricdevisesshouldbe unpluggedfromthe circuittoensure youdon’tgetfalse
readingswhentestingforfaults.
e. IT equipmentwouldbe destroyedwhenyouuse aninsulationresistance meteron
the circuitwhile theyare pluggedin.Theyshouldall be unpluggedbefore testing.
f. Capacitorsneedtobe fullydischargedotherwise it couldcause damage tothe
testingequipment.
10. Usinga voltage indicatorandtestingbetweenline andcpc,neutral andcpc, andline and
neutral.✔
11.
a. Line and neutral conductorare switched.Thiscanbe testedbyvisuallycheckingthe
line andneutral are inthe correct terminalsinthe consumerunit.
b. Thiscouldbe due to the machine eitherhavingnovoltage poweringit.Orit couldbe
a faultymachine.Tocheckif itis gettinganyvoltage youshouldtestacrossall 3
pointsonthe machinessupplysocket/switch.If novoltage ispresentitcouldmean
the socketisn’tconnectedtothe supply.
c. Usinga phase rotationtestertestacrossall 3 phases.If the meterdoesn’tshow L1-
L2-L3 thenit needstohave the phase putin the correct terminal.
12. Missinginsulationdue toRodentsorweather
Overheatingof cable causinginsulationtomelt
Cable notcomplyingwithbuildingregulations
Lose connectionsattermination✔
If its insulationwasmissinginasmall sectionof the cable due to rodentsorweather thenit
couldeasilybe repaired,butif itisa massive lengthof cable missinginsulationitwouldbe
easiertoreplace the entire cable.If the cable isoverheatingitwill needreplacingwitha
cable capable of carrying the designcurrenttostop itoverheating.If the cablesdon’tcomply
withregulationstheymustbe replacedasyouwouldn’tknow if theyare trulysafe touse.If
lose connectionsinthe terminal thenmostlikelyitjustneedstightening.
13.
a. Code C1 – Danger Present.
Code C2 – PotentiallyDangerous.
Code C3 – RecommendedImprovement.
b. C1 isthe worst ratingwhichcouldcause harm to anyone unknowingaboutthe
problem. I.e.alive cable danglingoutof trunkingwhichisable tobe pulledbya
person givingthemanelectricshock.
C2 isfor risksthatcould cause dangerinthe nearfuture.Forexample acrackedplug
socket.It’ssafe to use fornow butit couldeventuallycause harmtothe user.✔