Transcript DLRO
New Product Launch
DLRO10HD
Paul Swinerd – Power Product Portfolio Manger
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Product Family
New addition to the DLRO10 series •
D
igital
L
ow
R
esistance
O
hmmeter
10
Amp
H
eavy
D
uty
DLRO10 New DLRO10HD DLRO10X
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Product Family - Existing Products
DLRO10 and DLRO10X key features: • Hang from neck operation – Great for difficult access or use up ladders • Power limited to 0.25W only – Will not heat test piece • Detachable battery pack – Continuous testing possible with optional additional battery • 600V input protection – Without blowing a fuse 3
Product Family - Existing Products
Main Differences DLRO10 • LED display – Visible in bright sunlight • Three test modes DLRO10X • LCD dot matrix backlit • Drop down menu operation • • • Settable test limits Result storage with memos Five test modes 4
New
DLRO10HD
Built for harsh conditions Always ready to test Quick, intuitive, reliable testing High Accuracy 5
New DLRO10HD Features
New tough case • • • • • • Built for harsh conditions At home on bench or floor Lid mounted pouch as std.
IP 65 with lid closed IP 54 in operation Smaller version of MIT / S1 case Quality look and feel • Elastomeric, soft touch designer front panel 6
New DLRO10HD Features
Rechargeable battery and mains operation • • High capacity 7Ah battery Mains operation for continuous use applications – Production environments • Always ready to test – Even with flat battery •
Important competitive feature
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New DLRO10HD Features
Rotary switches • Selecting range and test mode • • • Ease of operation Intuitive No learning time Backlit LCD display • Noise and external voltage indication –
Important competitive feature
DH4 indicator light operation • External voltage and test complete indication (as DLRO10) 8
New DLRO10HD Features
Low or high output power selection • Green = all <0.25W
• • • Red = 10A <25W Diagnostic tool
Important competitve feature
Five test modes • Same as DLRO10X • Includes – Auto start on contact – Auto current reversal – EMF cancelling 9
New DLRO10HD Features
100 10 1 0.1
0.01
0.001
0.0001
0.00001
0.000001
0 DLRO10HD 250mΩ Ranges High Power and Low Power Output Comparison 0.05
0.1
0.15
Resistance 0.2
0.25
25.0W Max Low Power 250mΩ Range High Power 250mΩ Range 0.0025W Max
Low or high output power selection • Helps to show up: – Contamination – Rough mating surfaces – Frayed damaged wired High duty cycle • 10A at 25W for <60 sec 10
New DLRO10HD Features
High Input Protection • <600V between any terminal • • Will not blow fuse Indicates external voltage and inhibits testing • Same as DLRO10 and DLRO10X •
Important competitive feature
<600V
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New DLRO10HD – Applications
During electrical manufacturing processes • Testing switches, connectors and relays – To ensure contact resistance is within specified values.
• Cable resistance – Too low means too much copper in cable (higher costs), too high means not enough copper (cables’ current carrying capacity compromised) • Motors – To determine heat rise under load, measure winding resistance, check for short circuits or open circuits.
• Generators – To determine heat rise under load, measure winding resistance, check for short circuits or open circuits.
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New DLRO10HD – Applications
During electrical manufacturing processes • Fuses – To ensure resistance is within specified values.
• Cable looms – Checking bonding and interconnections when installing in equipment, racks etc.
• UPS / Car batteries – Carrier to plate weld resistance, High resistance indicates poor weld quality that will restrict battery’s ability to carry current.
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New DLRO10HD – Applications
Aircraft assembly and maintenance • Main frame electrical and mechanical bonds – to ensure a stable “ground plan” to protect aircraft from static electricity and lightning strikes.
– Static wick bonding – Antenna bonds – Control linkage bonding – Battery connection and interconnection – Integrity of structure and exhaust system – Metallic coating resistance 14
New DLRO10HD – Applications
Railway / Railroad Industry • • • • Strap and wire bond between rail segments – maintaining performance of control and telephone system. Minimising power loss on three rail systems. However sometime higher test currents are specified.
Cable joints – power system efficiency.
Earth / ground bonds – e.g. lightning protection on structures. Ground mats, ground conductor rings, metal cladding, metal ceilings, metal floors, hand rails, seats etc. to limit step and touch potential.
Platform edge doors – Earth / ground bonding (mainly underground systems) 15
New DLRO10HD – Applications
Aluminium refineries • Graphite electrodes – to verify density Ship building or any metal structures • • Weld quality – measure at regular intervals along weld length looking for uniformity.
Installed equipment bonds – to steel structure / hull.
Raw material processing, e.g. cement plants • • Power carrying elements – installation and maintenance Ground bonds - cement is corrosive Automotive industry • Cable leads in robot spot welders work-harden through flexing causing strands to break. Results in poor weld quality.
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New DLRO10HD – Applications
Power Generation and Distribution • Bus bars – lap joint tests to maintain low resistance, and hence maintaining efficiency and reducing likely hood of fire.
• • Cable joints – including overhead lines. High impedance joint can explode.
Fuses – connections Uninterruptible Power Supply (UPS) • Battery straps – quality of connections. Preventing potential of fire and failure to operate • Carrier to plate weld resistance – High resistance indicates poor weld quality that will restrict battery’s ability to carry current.
Military vehicles – Trucks, tanks etc.
• Installed equipment such as radio equipment - ground bonding to vehicle chassis.
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New DLRO10HD – Applications
Buildings – wiring, lightning protection bonds • • Various bond, both for power distribution and earth grounding – check for step and touch voltage safety in fault condition.
Conduit continuity – metal conduit, detect corroded or loose threads etc.
Pipe lines • Cathodic protection – check connection etc. Tough environment ideal for the DLRO10HD Wind turbines • Lightning protection – wing tip to base, or component parts in manufacture. Long test leads available for this application.
• Earth ground bonds – various 18
DLRO10HD Customers
Power Utilities
• Maintenance and commissioning departments
Electrical Contractors
• • Contracted to Power Utilities Maintaining power systems
Testing Companies
• • Contracted to Power Utilities Maintaining power systems
Electrical Maintenance Companies
– Contracted to Power Utilities – Maintaining power systems 19
DLRO10HD Customers
Industrial/Manufacturing Plants
• Using and maintaining power systems and rotating machinery
Process Control Plants
• Industrial manufacturing plant
University / Colleges
• Research applications
Railways
Air lines
Aircraft manufacturers
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DLRO10HD Customers
Wind turbine manufacturers Wind turbine installation contractors Car manufacturers Bus, truck, light commercial vehicle manufacturing Electricians Defence / Government Cable Manufacturers Motor and generator manufacturers Fuse manufacturers
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DLRO10HD Customers
Battery / UPS manufacturers and installers
Electrical plant and equipment manufacturers
Electronics manufacturers
Aluminium refineries
Cement works
Ship builders
Military manufacturing
Pipe line installation contractors
Mining industry
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Sales tools
Data sheets • DLRO10, DLRO10X and DLRO10HD Guide to low resistance testing • Covers techniques and applications for DLRO products.
• Part No. AVTMDLRO/MEG-304_V03 ANSI/IEEE Standard C37.09
• Section 5.14: Electrical Resistance test.
NETA • Contact resistance test recommended in equipment procedure Megger Web Site • Electronic copies DLRO10HD Application note • Available on website 23