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1 Replies and 2792 Views
CR4220-400 2792 1
Started by Paul Rogers
About 6 months ago we installed a CR4220-400 and the FLC of the motor it is on is 130A (checked with a handheld ampmeter) but the HMI display reads up to 424A. We have checked out the analog input card and it is ok and checked and double checked the ratio for the 4-20ma signal and it is ok. This CR4220 is on the motor side of a soft start instead of an across the line starter, we just wanted to know if this might be causing any problems before we replace the CR4220. Any advice Thanks
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2792 |
by Tony Hodges 03/22/2012 10:30 AM |
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1 Replies and 2914 Views
High Thermal Drift of CR5310-600 2914 1
Started by Arseniy V
We have a few CR5310-600 voltage transducers that are rated at 200ppm/C but we measured much higher thermal drift (we used calibrated oven, calibrated Fluke 8842A DMM, and calibrated powersupply). Here are a data points from our measurements (also attached as JPG file): Vin=608.41V Vout=5.0256V &91;54.1C&93; Vin=608.40V Vout=4.9974V &91;44.0C&93; Vin=607.14V Vout=4.7806V &91;33.5C&93; Vin=607.74V Vout=4.5974V &91;23.9C&93; Clearly you can see a significant ther...
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2914 |
by Tony Hodges02/23/2012 12:22 PM |
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1 Replies and 2812 Views
Windings in CR8348-2500-N 2812 1
Started by Wolf Homma
I recently cut open a CR8348-2500-N. It appears that the windings are brought on in layers. From examining the design I concluded that there must be an 'upper' copper layer close to the hole on the CT. Naturally, this layer is closer to the bus bar going through the hole than the 'buried' layers underneath. From that it should follow that the CT is not a perfectly symmetrical component, if you consider the capacitance from the primary (high-voltage) bus bar to the 'upper' copper winding being hi...
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2812 |
by Tony Hodges02/16/2012 8:43 AM |
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1 Replies and 2707 Views
Metering Class CTs 2707 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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2707 |
by Tony Hodges02/10/2012 11:34 AM |
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3 Replies and 2793 Views
What to choose CR5411S-300 or CR5211S-300? 2793 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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2793 |
by Tony Hodges02/03/2012 10:06 AM |
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1 Replies and 2762 Views
Model 19 current transformer 2762 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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2762 |
by Tony Hodges02/02/2012 11:50 AM |
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1 Replies and 2641 Views
CR4110 supply voltage 2641 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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2641 |
by Tony Hodges02/02/2012 11:46 AM |
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1 Replies and 3795 Views
LEM - HTFS 800-P - CURRENT TRANSDUCER 3795 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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3795 |
by Tony Hodges01/23/2012 2:13 PM |
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1 Replies and 2821 Views
5210-5 Output Measures 24 V 2821 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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2821 |
by Tony Hodges12/06/2011 10:00 AM |
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1 Replies and 2973 Views
Phase angle error 2973 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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2973 |
by dave forsythe11/14/2011 9:27 AM |
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1 Replies and 2775 Views
CR8348-2000 - Ks sensitivity Value 2775 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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2775 |
by Tony Hodges11/10/2011 9:16 AM |
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3 Replies and 2817 Views
Question on CR 5395 current relay 2817 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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2817 |
by Tony Hodges11/02/2011 11:27 AM |
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3 Replies and 3040 Views
CR series current transformer bandwidth 3040 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
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3040 |
by Tony Hodges10/21/2011 11:34 AM |
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1 Replies and 3057 Views
603 series details 3057 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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3057 |
by Tony Hodges10/12/2011 11:25 AM |
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2 Replies and 2950 Views
CRM 3000-50 2950 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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2950 |
by Gene Boren10/03/2011 2:44 PM |
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1 Replies and 3057 Views
Directional AC current measurement 3057 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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3057 |
by Tony Hodges09/22/2011 3:30 PM |
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3 Replies and 4004 Views
CR8300 spec 4004 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.
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4004 |
by Tony Hodges09/13/2011 3:00 PM |
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1 Replies and 3434 Views
DC Hall Effect Current Transducer frequency response 3434 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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3434 |
by Tony Hodges08/10/2011 10:48 AM |
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1 Replies and 3387 Views
Split Core Transducer Temperature Ratings 3387 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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3387 |
by Tony Hodges08/03/2011 9:29 AM |
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3 Replies and 3463 Views
200A CT - CR8459? 3463 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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3463 |
by Tony Hodges07/25/2011 2:07 PM |