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1 Replies and 3399 Views CR4395 Max sensed current  3399  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
1 Replies and 3248 Views CR4395 on 50 Hz  3248  1 Started by  kirk kerekes Will the CR4395 function and be durable running on 50 Hz I recognize that the current threshold will probably be inaccurate, but that is not a concern. If it will work on 50 Hz, that would broaden your potential marketplace substantially.
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by  Tony HodgesJump to last post
06/24/2011 10:58 AM
1 Replies and 3678 Views CRD5170 How to calculate Power field for 3-phase  3678  1 Started by  Bud Wycoff Transducer Name: !04CRD5170-130-30 When requesting 'all data' from this DataStream transducer I receive the following data: >0.87500.50470.88110.50500.00000.00020.25430.15010.666759.973 From this data I calculate each field. Voltage1 = 130*0.8750 =113.75 Current1 = 30*0.5047 = 15.141 Voltage2 = 130*0.8811 =114.543 Current2 = 30*0.5050 = 15.15 Voltage3 = 130*0.0000 = 0.0000 Current3 = 30*0.0002 = 0.0006 Power = 30*130*0.2543 =991.77 When I calc watts ...
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by  Bud WycoffJump to last post
04/28/2011 12:27 PM
1 Replies and 3711 Views CR5210S-2-ND  3711  1 Started by  Gherson Florez What is the minimum value of DC current that can measure the Current Transducers CR5210S-2-ND Do you have a more specific data sheet for this reference Thanks, Gherson
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by  Tony HodgesJump to last post
04/01/2011 12:34 PM
1 Replies and 3723 Views CR4220 loop voltage  3723  1 Started by  Rene Huber The CR4200 devices specify a loop voltage of 24VDC. Would it be possible to operate this sensor at lower voltages, such as 12VDC. The load resistor is 75 ohm.
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by  Tony HodgesJump to last post
03/08/2011 8:08 AM
3 Replies and 5562 Views isolation amplifier 5210  5562  3 Started by  Rajesh Kallur hi! i have got CR 5210-10 and CR 5210-300 current transducer, and am building a test stand with DAQ. What I want to know is that when you say supply is 24V - 10 it means that there is an isolation amplifier/voltage regulator between the supply circuit and and the transducer circuit, right I need to make sure about this, as I don't want noise in the transducer output,given that my supply can have around 1V spikes at times. Please clarify this, else I need to think of routing the supply thro...
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by  Tony HodgesJump to last post
01/31/2011 9:57 AM
1 Replies and 4019 Views PNP OR NPN  4019  1 Started by  Anthony Rutland I have a Automation Direct PLC Do-06DR. DC inputs sinking or sourcing. I am switching 0VDC to the inputs and the 24VDC is connected to the input commons. I belive this means the inputs are sourcing. Which CR9321 current switch would I use How would it turn on with only 0VDC at its input and the other wire going to the plc input
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by  Tony HodgesJump to last post
12/20/2010 12:10 PM
1 Replies and 4236 Views CRD5110 Communications Issues  4236  1 Started by  Juan Mustelier I have been having some issues w/ the CRD5110-300-5 communications both in Windows XP & Windows 7. 1) Windows XP seems to be more reliable than Windows 7 when communicating w/ the CRD5110 device. 2) For some reason the USB to RS-232 to RS-485 to CRD5110 communications links sometimes seems to get jammed up requiring a machine boot, since there is no other way to bring the link back into a working state. Opening & closing the serial port from inside Windows does not revive the link, however, so...
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by  Tony HodgesJump to last post
07/22/2010 8:52 AM
6 Replies and 5314 Views CR9321-ACA  5314  6 Started by  Tony Hodges I have a CR9321 ACA. I want to use it as an initiate switch for a relay (S1). I've attached a .pdf for the relay. Will I need a snubber for this application Everything is 240VAC.
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by  Bob ZockoffJump to last post
06/15/2010 9:14 AM
2 Replies and 5039 Views CR5220-300 information  5039  2 Started by  Eyal Braude Dear Sir, We presently use your CR5220-300 transducer. Normally, the current is no more than 250A. Sometimes, for a period of few seconds, the current rises approximately to 1000A. What will be the current output of the transducer when this occurs Thank you. Eyal Braude
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by  Eyal BraudeJump to last post
06/02/2010 4:55 AM
2 Replies and 7828 Views CR8401-1000-G  7828  2 Started by  Tony Hodges We are looking for recommendations for a current sense and GFCI coils for our electric vehicle charging station. We use the Fairchild RV4141AN GFCI controller and are looking to understand the Ir rating on the three parts you offer. Does that number represent the maximum current that flows 180° out of phase in both directions through the coil or the maximum net difference that would appear as a result of a ground fault Our product will pass a maximum of 40A AC, but a dead short ground ...
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by  David LachanceJump to last post
03/12/2010 2:14 PM
1 Replies and 5874 Views Multiple CR5210 transducers on a single CRPS24VDC Power Supply?  5874  1 Started by  Marc Marshall I'm building a small device to measure several currents with CR5210-2 transducers, and it would be easiest to use a single 24V power supply to power all of them. However, I can't find any information on the max current (or power) that a CRPS24VDC-120 power supply can provide. Is this documented somewhere Alternately, what is the maximum number of CR5210-2 transducers that can be powered by a single CRPS24VDC-120
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by  Tony HodgesJump to last post
12/17/2009 8:13 AM
1 Replies and 5505 Views CR8401-1000-N  5505  1 Started by  Tony Hodges I am interesting in purchasing one of these ground fault current transformers: CR8401-1000-N CR8410-1000-N CR8420-1000-N I have a couple questions though. 1. We want to measure the current imbalance of 60Hz line pair. So I think if we used one of your transformers we would simply put the wire pair through the core and then what we measure out would be proportional to the current difference. I am not sure if the transformers above are all that you have or if they are the best so...
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by  Tony HodgesJump to last post
09/04/2009 9:07 AM
2 Replies and 4556 Views CR5400  4556  2 Started by  Tony Hodges I am interested in using the CR5400 in one of our inverter applacations. But I need more information.
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by  Tony HodgesJump to last post
09/04/2009 9:02 AM
2 Replies and 4913 Views CR4400 Series  4913  2 Started by  Tony Hodges I have a machine that is powered with a 20HP 480V motor that drives a nylon bristle abrasive brush that applies a sanded finish to a product. The nylon bristles are sensitive to pressure, too much pressure causes the bristles to melt, too little pressure does not finish the product. The pressure is regulated by an operator with a hand switch that either raises or lowers the bristles to the product. The operator observes an analog amp gauge and raises or lowers the bristles to try to maintain ...
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by  Tony HodgesJump to last post
09/04/2009 8:57 AM
1 Replies and 5456 Views CR3110-3000  5456  1 Started by  Tony Hodges have been purchasing your CR3110 CTs from Digikey for use in energy monitoring. I like the split core for all of the obvious reasons. Unfortunately the .4' opening is too small for the heavier wire gauges. 2/0, 3/0, 4/0. Do you make any split cores that have a bigger opening I don't want a massive CT as it won't fit into most electrical panels.
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by  Tony HodgesJump to last post
09/04/2009 8:44 AM
1 Replies and 6555 Views Current Transformer  6555  1 Started by  Tony Hodges Split Core CT for 30 amps primary and 333 mV secondary. The window could be the least dimensioned.
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by  Tony HodgesJump to last post
09/04/2009 8:41 AM
1 Replies and 4682 Views Coil Question  4682  1 Started by  Tony Hodges My company is working on a project that we need to know when a coil is pulled in. It is a 115vac coil and pulls .6 amps. I would like to have a simply inline switch that we could tie into a plc. I do have both legs of the 115 vac to work with.
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by  Tony HodgesJump to last post
09/04/2009 8:38 AM
1 Replies and 5422 Views Transducers  5422  1 Started by  Tony Hodges I'm looking for two different types of voltage transducers. Both would be used to provide analog inputs to a building management system. One transducer would be used for monitoring the voltage on a standard, single phase 120VAC circuit. One transducer would be used for monitoring the voltage on a bank of batteries (normal would be 48VDC) I'd prefer an output of 0-10vdc to the BMS system, but 0-5vdc, 0-20ma or 4-20ma would also work
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by  Tony HodgesJump to last post
09/04/2009 8:27 AM
1 Replies and 5245 Views DC Transducer  5245  1 Started by  Tony Hodges We are considering using a DC current sensor in an upcoming product for Solar Inverters. Here are the requirements: * Ability to sense DC current from 1 to 10A, with 5 or better accuracy. * Bandwidth from 0 to 10Hz. * Must be able to withstand fault currents up to 300ADC. * UL listed or recognized preferred. * Operating range from -20 to 60C.
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by  Tony HodgesJump to last post
09/04/2009 8:14 AM
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