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3 Replies and 4183 Views cr9350-aca  4183  3 Started by  jim dayringer I'm using a cr9350-aca to energize a small interposing relay with a 120V coil and power draw of 9ma. Will I need a snubber circuit I found an old cut sheet for the cr9321-aca that showed a 2k ohm resistor and a .1uf capacitor as a recommended snubber. When I tried this it made the relay coil hum. The operation in either case was the same. Do I need the snubber to protect the current switch Thanks
3 4183
by  Tony HodgesJump to last post
04/29/2010 2:33 PM
2 Replies and 7055 Views CR8401-1000-G  7055  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 ...
2 7055
by  David LachanceJump to last post
03/12/2010 2:14 PM
1 Replies and 5202 Views Multiple CR5210 transducers on a single CRPS24VDC Power Supply?  5202  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
1 5202
by  Tony HodgesJump to last post
12/17/2009 8:13 AM
1 Replies and 4832 Views CR8401-1000-N  4832  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...
1 4832
by  Tony HodgesJump to last post
09/04/2009 9:07 AM
2 Replies and 3774 Views CR5400  3774  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 4271 Views CR4400 Series  4271  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 ...
2 4271
by  Tony HodgesJump to last post
09/04/2009 8:57 AM
1 Replies and 4787 Views CR3110-3000  4787  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.
1 4787
by  Tony HodgesJump to last post
09/04/2009 8:44 AM
1 Replies and 5895 Views Current Transformer  5895  1 Started by  Tony Hodges Split Core CT for 30 amps primary and 333 mV secondary. The window could be the least dimensioned.
1 5895
by  Tony HodgesJump to last post
09/04/2009 8:41 AM
1 Replies and 4039 Views Coil Question  4039  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.
1 4039
by  Tony HodgesJump to last post
09/04/2009 8:38 AM
1 Replies and 4759 Views Transducers  4759  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
1 4759
by  Tony HodgesJump to last post
09/04/2009 8:27 AM
1 Replies and 4651 Views DC Transducer  4651  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.
1 4651
by  Tony HodgesJump to last post
09/04/2009 8:14 AM
1 Replies and 4009 Views Frequency Transducer  4009  1 Started by  Tony Hodges I am looking for a FREQUENCY transducer that can meet the following requirements: 0 - 500hz 0 - 150Vac input. These are the maximum ranges. Can you provide some assistance on this issue.
1 4009
by  Tony HodgesJump to last post
09/04/2009 8:09 AM
1 Replies and 4471 Views Relay application question  4471  1 Started by  Tony Hodges This concerns your CR5395 current sensing relay system (the 'device'), applied to a charger system for an electric vehicle. The attached diagram reflects my current configuration, 'as built' (I contributed the diagram to Wikibooks). I will shortly be installing 8 small isolated chargers to float charge my 96 volt (16 x 6V) pack in order to reduce cooling fan wear and noise on the bulk charger. The in-vehicle bulk charger (K&W)is powered through a vehicle mounted relay ('Ry CP')whose purpose i...
1 4471
by  Tony HodgesJump to last post
09/04/2009 8:06 AM
1 Replies and 4389 Views 3 Phase Active Power Transducer  4389  1 Started by  Tony Hodges I am looking for a 3 phase active power transducer, for a test system. The transducer must be approved for use in branch circuit in a UL 508 controller. I want to measure active power for some 3 phase motors. Motor data: Voltage 3x480V or 3x208V Frequency 50-60HZ Current 0-7A Output 0-10V or 4-20mA Is this something you have in your product range
1 4389
by  Tony HodgesJump to last post
09/04/2009 8:01 AM
1 Replies and 4389 Views 3 Phase 4 Wire system  4389  1 Started by  Tony Hodges We have a 3-phase 4-wire system and would like to add the ability to measure individual line currents. This system operates at 400 Hz and we are expecting to never have to read over 15A per phase. This will be part of an automated test program. Currently we have 120 V 60Hz, 5VDC and 28VDC available as a power source. It would be greatly appreciated if you could point me to a part number that would work.
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by  Tony HodgesJump to last post
09/04/2009 6:50 AM
1 Replies and 4189 Views CR5310S  4189  1 Started by  Tony Hodges Does the S5310 DC Voltage Transducer come at the 100VDC measurement level with the 0-5VDC output Also, can we get the 28V option for Supply Voltage power
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by  Tony HodgesJump to last post
09/03/2009 9:20 AM
1 Replies and 4708 Views Frequency transducer with specific ranges  4708  1 Started by  CRMagnetics Staff I am looking for a FREQUENCY transducer that can meet the following requirements: 0 - 500hz 0 - 150Vac input. These are the maximum ranges. Can you provide some assistance on this issue
1 4708
by  CRMagnetics StaffJump to last post
08/04/2009 6:05 AM
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