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1 Replies and 2299 Views Metering Class CTs  2299  1 Started by  Ed Lampe I see that the 50:5 CT's have a lower accuracy than the 100:5 CT's. Specifically the CR2DA series. Would I achieve higher accuracy by using a 100:5 and passing the metered wire through a second time thereby creating a 50:5 My max current will always be less than 50A. Thank You.
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by  Tony HodgesJump to last post
02/10/2012 11:34 AM
3 Replies and 2354 Views What to choose CR5411S-300 or CR5211S-300?  2354  3 Started by  johannes myhre I want to use CR5411S-300 for a battery testing setup (w. NI labView) Is this a good choice for automated measure of charging and discharging, 100ADC to -250ADC The input device (NI) has -10 10VDC diff. input. I read in your pdf info that CR5210/20S Series is 'ideal for battery charging applciations' But I don't think this will work good for my setup, with average DC value and simulated battery use (rapid changes charge/discharge) Please advice
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by  Tony HodgesJump to last post
02/03/2012 10:06 AM
1 Replies and 2324 Views Model 19 current transformer  2324  1 Started by  johannes myhre I have 10. model 19 transformers that I want to use with a standard IP67 LED http://no.farnell.com/cml-innovative-technologies/19010051/led-indicator-8mm-green-ip67/dp/1368960 Do I need some resistor or diode to get it to work I did not order the LED that is made for this, bacause I need it to be waterproof.
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by  Tony HodgesJump to last post
02/02/2012 11:50 AM
1 Replies and 2203 Views CR4110 supply voltage  2203  1 Started by  Pete Stoneberg We've got a bunch of CR products, like the 4110s, 4510's, and 6610's. I've got power supplies to give them 24v, but my Edaq can give 15v. The 24v power give a lot of noise on the freq and voltage transducers. I tried 'em at 15v Edaq power, andth esignal is much nicer. What are the problems running the transducers at lower supply voltage Thanks, Pete
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by  Tony HodgesJump to last post
02/02/2012 11:46 AM
1 Replies and 2385 Views LEM - HTFS 800-P - CURRENT TRANSDUCER  2385  1 Started by  michael golub I need something like this one: http://www.farnell.com/datasheets/65377.pdf got anything like it
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by  Tony HodgesJump to last post
01/23/2012 2:13 PM
1 Replies and 2382 Views 5210-5 Output Measures 24 V  2382  1 Started by  scott carden I have 24 V supplied to 3 5210-5 transducers. When I measure the output of the transducer I get 24V. Can you help Thanks in advance.
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by  Tony HodgesJump to last post
12/06/2011 10:00 AM
1 Replies and 2548 Views Phase angle error  2548  1 Started by  arun T Hello Sir, I am Arun studying Bachelor of Engineering in India. For my project i have to calculate phase angle error for a CT. How to calculate phase angle error in theoretically for resistive burden (Non inductive). Example : 1:500 Turns ratio, 10A/0.02A, Burden = 50 ohms, DCR = 27 ohms. For this example how to calculate phase angle error for this CT. Pls help with formula...Advance thanks for ur help.
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by  dave forsytheJump to last post
11/14/2011 9:27 AM
1 Replies and 2334 Views CR8348-2000 - Ks sensitivity Value  2334  1 Started by  Marcus Vinicius Zanon Castelo Branco Dears, I am using the CR8348-2000 Current Sensor and and i need the Sensitivity Value &91;V/A&93;parameter. This parameter is part of a formula that is shown at table 3, on page 19 in attached. Thank you. Marcus p.s. can i calculate it by the formula in attached 'formula.jpg'
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by  Tony HodgesJump to last post
11/10/2011 9:16 AM
3 Replies and 2373 Views Question on CR 5395 current relay  2373  3 Started by  Jeff McIntosh I am looking at this current relay in the DC version to be used in a circuit to sense the current going to a 1/8hp 90 VDC permenant magnet motor. The current will be 2 amps or less and need to energize a panel lamp when the motor is running along with a future interlock to shut the system doen on a motor interruption. Will the CR 5395 do this
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by  Tony HodgesJump to last post
11/02/2011 11:27 AM
3 Replies and 2615 Views CR series current transformer bandwidth  2615  3 Started by  Matthew Beasley We are looking at an application where we would like to monitor the line frequency harmonics. The fundamental signal would be at 50Hz or 60Hz, but we are interested in the frequency response up to 3kHz. How much phase and amplitude error is there at 3kHz
3 2615
by  Tony HodgesJump to last post
10/21/2011 11:34 AM
1 Replies and 2621 Views 603 series details  2621  1 Started by  Evran Zihnioglu I am interested in 603 series split core transformer. I have some questions about the product; 1. What is the difference between 603 and 603D. 2. In the datasheet, it is mentioned that the product can work 50-400Hz frequency range. I will use this transformer where maximum frequency could be 430Hz theoratically. So I am wondering that What will be the attenuation level above 400Hz. Could I use this product in the specified frequency 3. In the datasheet of the product, ...
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by  Tony HodgesJump to last post
10/12/2011 11:25 AM
2 Replies and 2523 Views CRM 3000-50  2523  2 Started by  Gene Boren I am new to your product line,Question: Is the CRM 3000-50 a completely self contained unit for producing an Digital display of Current being produced or are other additional devices required such as a current sensing transformer
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by  Gene BorenJump to last post
10/03/2011 2:44 PM
1 Replies and 2615 Views Directional AC current measurement  2615  1 Started by  Andrew Foss We are measuring AC current to combination load/generators and want to read directionally up to 100Amps, which CT would be appropriate
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by  Tony HodgesJump to last post
09/22/2011 3:30 PM
3 Replies and 3520 Views CR8300 spec  3520  3 Started by  Thuan Truong Dear Technical, I'm looking for the Phase angle error or phase shift, ratio error, standard Accuracy class, and nominal linearity . Where can I get these info Thank you. Best regard, Thuan Truong.
3 3520
by  Tony HodgesJump to last post
09/13/2011 3:00 PM
1 Replies and 2992 Views DC Hall Effect Current Transducer frequency response  2992  1 Started by  Chris Penrose The product I am testing produces 24V switched (PWM) at 20kHz to supply 200A DC current into a 0.12ohm load in series with a 1mH inductor. The current is a 20kHz triangle wave. To calibrate this current I am currently using a 200A / 100mV shunt into a 6.5 digit DMM (mV). I would like to use the CR5210-300 however I am concerned about what it will do with the 20kHz component. (Ideally it will provide a accurate average current). Any ideas
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by  Tony HodgesJump to last post
08/10/2011 10:48 AM
1 Replies and 2936 Views Split Core Transducer Temperature Ratings  2936  1 Started by  Evran Zihnioglu What is the operating temperature limits of 603 and 610 series And also, because these transformers are split core, what is the mechanism to fix the core. I am planning to use them in a modest vibration so the one that has better mechanical integrity is the one that I looking for. Regards.
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by  Tony HodgesJump to last post
08/03/2011 9:29 AM
3 Replies and 3033 Views 200A CT - CR8459?  3033  3 Started by  Chuck Brodeur Need a revinue grade CT capable of measuring 200A with a hole size > .700'. Will the CR8459 work If so, what ratios are available Thanks.
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by  Tony HodgesJump to last post
07/25/2011 2:07 PM
1 Replies and 2910 Views Are CR3100s insulated or raw metal on the outside?  2910  1 Started by  Chris Shearer Cooper Are CR3100s insulated or raw metal on the outside I'm thinking to put a few of these inside my breaker box to monitor electrical consumption but need to plan for safety ...
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by  Tony HodgesJump to last post
07/11/2011 8:27 AM
1 Replies and 2920 Views C4411 info  2920  1 Started by  Jehan Machado Hi! I'd like to know some additional info I can't find in the C4411 datasheet. Is the informed accuracy related to the measure point or to the upper range limit What is the value of threshold Thank you!
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by  Tony HodgesJump to last post
07/05/2011 11:13 AM
1 Replies and 3249 Views CR4395 Max sensed current  3249  1 Started by  kirk kerekes Is there any issue with transient currents passing through the sensing coil significantly in excess of the nominal maximum current My application is managing inrush current on a large 240VAC transformer.
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by  Tony HodgesJump to last post
06/24/2011 10:59 AM
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