Transcript The Model 505 CT/PT Analyzer

Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
The Model 505
CT/PT Analyzer
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
Welcome & Thank You!
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•
•
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3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Model 505 – What is it?
Testing Capabilities
CT/PT – Why Test?
Value in Purchase
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
What is it?
• The Model 505 is a Current
Transformer and Potential
Transformer Analyzer
– It’s a small portable tester for testing CT’s and
PT’s in- or out of-service
– It provides test data to determine if the CT’s or
PT’s are bad
– It helps diagnose installation issues
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
What is a CT?

A Current Transformer that reduces high primary current to
5 amps for measurement by a revenue meter.

A CT is designed to make this reduction accurately when
driving the secondary current into a known burden.

If the secondary burden is exceeded, the CT’s accuracy
will be compromised.
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
CT Accuracies
What is meant by +/- 0.3 % Between the Burdens of 0.1 and 0.5 ohms? – 2.0 RF
0.6%
0.3%
10%
200% or Rating Factor
100%
-0.3%
-0.6%
Current
•Below 10% and Above Rating Factor Current – Accuracy is not Guaranteed
•Above 0.5 ohms of Total Circuit Burden – Accuracy is not Guaranteed
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
What is BURDEN?
The total amount of resistance in Ohms and
inductance in Milli-Henries which may be
connected to the secondary without causing a
measurable error greater than specified by the
CT’s accuracy classification.
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
What Makes Up The Burden?
• Electricity Meter Current Coils
• Meter Socket
• Test Switch Components
• Wire Gage
• All compression connections
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
Installation Issues?
•Mis-Wired Installation
•Wrong Nameplate Information
•Wrong system Multipliers
•Lightning strike causes shorted windings or
magnetizes the core.
•Open Secondary causes failed insulation in CT
windings or magnetizes the core
•CT age causes Insulation Failure
•Installation age/location causes excessive Circuit
Burden
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
Model 505 CT/PT
Testing Capabilities
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
Model 505
Admittance Test
•Tests CT’s in Circuit or out of Circuit (with & without Load)
•Easily checks for Open Circuits, Shorted CT’s, Bad CT
Windings – all from the Test Switch – Does not Magnetize the
CT
–Because of sensitivity of the Admittance Testing, large changes in results
will be seen on circuits with minor problems.
•Results are very repeatable and independent of load.
•Results are evaluated by comparing the results to the other CT
readings and also comparing the previous results
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
Model 505
CT Burden Test
•A Meter Circuit Burden Test is accomplished by inserting a
know load (resistance) and comparing the Before and After
secondary current measurement. A burden tests helps determine
the capability (VA) of the CT.
•Acceptable Burden Tests require a reasonable load to be present
(50% of rating).
•Burden Test Results significantly vary based on the load and
require a knowledgeable person to interpret.
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Model 505
Demag
Power and Energy Measurement Specialists
8.0
4.0
2.0
1.0
0.5
0.2
0.1
Time
•Utilizes the Burden Resistance to take the CT into
saturation and then bring it out of saturation
•To ensure the CT is properly Demagged, the CT
should be loaded to 50% or more of rating (typically
2.5 amps)
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
Model 505
CT Ratio Test
•A Ratio Test determines the Current Ratio and Phase
Angle between the Primary and Secondary Currents on
the CT
•A Primary Current Probe is utilized for direct primary
current measurement
•Accurately Measures Actual Ratio and Phase angle
between the Primary / Secondary Service
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
Model 505
PT Burden Test
•A PT Burden test is used to determine whether a PT
has enough VA capability to drive the attached load and
provide an accurate voltage to the measurement circuit
•To perform the test, varying Burdens (Resistance) are
applied to the PT. The Before and After Burden
Application is compared. If a change is realized, either
the PT is rated too small, significant Burden is in the
measuring circuit or too much load (relays, etc..) is
‘hung’ on the PT.
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
Model 505
Service Wiring Test
•The 505 includes an Accurate Single Phase Digital Volt
/ Amp / Phase Angle Meter
•By Taking a few Measurements – A Tester can
accurately determined if the Service is properly Wired
•All measurements taken from test switches
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
Why Test CT’s and PT’s?
• CT’s and PT’s ratio down the real power for
easy measurement and isolation
– Directly involved with billing of consumer
• High error tolerances allow for large revenue loss
– Transformers installations are gaining attention due to high
loss capabilities
– CT’s and PT’s are utilized on large consumers
• Typically 80% , or more, revenue comes from large
Consumers
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
• Utilities
– Common Trends
• Down Sizing Personnel
• Limited Resources
• Tight on Budget
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
Why the 505?
• The 505 is Ideal!
• Less People doing more work
– 505 is Quick and Simple
» Limited test time, no problem – short and simple or
complex investigation
» Focus on top 10 power consumers for immediate payback
– 505 is Unique and Powerful
» Admittance testing, Ratio Testing, Burden Testing all in
one test kit
• Payback comes from finding lost Revenue
– 505 is Low cost with High ROI
» Easily find wiring errors and CT problems -- $$$$$
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
• Application Note
– Learn how the using the 505 can
benefit your company
• Admittance Testing
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Me
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
Value in Purchase
How can I justify the cost?
• Test CT’s to find lost Revenue
– Pays for itself and beyond It Pays your Company
• Test Ratio, Burden and Admittance
– Many ways to diagnose a problem
• Admittance test allows a way to test with or
without an energized site
– Prevents wasted trips to customer site
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
Value in Purchase – Cont
• Ability to Demagnetize CT’s
– Recover CT’s without disconnecting customer
– Recover lost revenue caused by a magnetized CT
• Radian Research - 2 year warranty
– No more worry about equipment failure
• Onsite or PowerPoint Training
– Easy Out of box operation
• Experience and knowledgeable support staff
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
Available Model 505 Configurations
• 505-000
– With CT/PT Burden Option
• 505-100
– Without CT/PT Burden Option
• Extended Lid
– 505-020
• Gives extra room to store additional cables
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
505 Accessories
• Accessories for Admittance and Burden
Testing
– 505-02 CT Test Leads
• 7½ foot lead terminated with Superior test switch safety
probe.
– 505-03 CT Test Leads
• 7½ foot lead terminated with Westinghouse test switch
safety probe.
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
505 Accessories – Cont
• Accessories for Ratio Testing
– JM 875 Current Probe
• AC Clamp-on Current Probe - Current Ranges - 0-30A;
30-300A; 300-3000A.
– MR521 Current Probe
• CT Clamp-on current probe. 1-150 / 1500 ampere range
– Model 3000 Rope CT
• Lightweight with a measurement range of 5 to 3000A
rated at 1000 V max.
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
505 Accessories – Cont2
• Accessories for High Voltage Ratio Testing
– LW2000-15 AC Current Probe
• Fiber optic coupled CT current probe for primary
measurements. 0-2000 ampere range. Maximum cable
diameter 1.8” Accuracy ±1.5%
– LW2000-16 AC Current Probe
• Maximum cable diameter 3.8”
• Rated to 150kV Line to Line
3852 Fortune Drive
Lafayette, Indiana USA
www.radianresearch.com
Radian
Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
All Utilities need a Model 505!
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Research, Inc.
Radian Research,
Inc.
www.radianresearch.com
an employee owned company
Power and Energy Measurement Specialists
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3852 Fortune Drive
Lafayette Indiana 47905
www.RadianResearch.com
Phone: 765-449-5500
Fax: 765-448-4614
3852 Fortune Drive
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www.radianresearch.com
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