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1 Replies and 6902 Views part information  6902  1 Started by  Shane O'Neill Hi,I am from Ireland and need a bit of information, We work on 230v ac system,I am looking for a current relay that will switch 230v ac 1 to 2 amps when 10amps or more passes throught the relay, or some thing similar.Could you please recommend 1 of your products that will handle this setup.As i will hopefully be ordering plent, regards shane
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by  Tony HodgesJump to last post
01/20/2015 2:30 PM
1 Replies and 2531 Views CR9580 - Signal Out (Volts)  2531  1 Started by  Will Charlton On the datasheet for the CR9580-&91;10,20,50&93; Current Sensor, there are two values for the Voltage on the Signal Out. - Signal Out: 0 -5 VDC - Max. Signal Out: 12VDC Is the maximum 5 or 12 V I understand that we're talking about RMS values, but I'd like to understand under which conditions would I see a 12VDC value on the output of this device. Datasheet: http://www.crmagnetics.com/Products/Assets/ProductPDFs/CR950020Series.pdf
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by  Tony HodgesJump to last post
01/06/2015 10:53 AM
1 Replies and 2653 Views CR9321-NPN current switch issue  2653  1 Started by  Jonathan Barry Hi, I have a monitoring system on my home that uses the CR9321-NPN current switch to let me know how much energy I am using in a number of areas. In this case my hot water tank is reading as if the current is constantly on (when I know it isn't). Please see the website here for my home system and the hot water tank reading at 3.5kW constant. http://welserver.com/WEL0304/ In this system I am using a monitoring device called a WEL (Web Energy Logger). It is a great little device and ...
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by  Tony HodgesJump to last post
10/22/2014 3:29 PM
3 Replies and 5614 Views CR5210-2 overcurrent questions  5614  3 Started by  first last Greetings, I have two small servo motors that I’m attempting to monitor current draw at the operators station with inexpensive panel meters. The average current draw is around 400mA with peaks in the 1.25A region, but in an overload/binding situation, the motor/drive briefly spike to approx 8A before faulting out, destroying the ammeter(s). Will the CR5210-2 tolerate overcurrent conditions with no ill effects to the transducer, and/or whatever is connected to the transducers output ...
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by  Tony HodgesJump to last post
08/08/2014 9:23 AM
1 Replies and 2725 Views CR3110 with 5ADC to 75ADC  2725  1 Started by  Bret Beringer I need to be able to detect the presence (not level) of DC current over a range of 5A to 75A with surges of up to 300A. I am having trouble finding a burden resistor that will allow enough voltage to detect the low range and stay under the Vmax rating of the part. The max is an RMS value, so how does this play in for DC Any other suggestions are welcome.
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by  Tony HodgesJump to last post
07/22/2014 2:53 PM
3 Replies and 3747 Views CR5210-100 Bidirectional IO  3747  3 Started by  Kyle Fodchuk I'm spec'ing the CR5210-100 to monitor battery bank charging and discharging. Does the 10V output indicate 100A and -10V output indicate -100A
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by  Tony HodgesJump to last post
07/17/2014 12:03 PM
3 Replies and 2421 Views CR6620-60-500  2421  3 Started by  Ryan Blackmon This transducer is being used in an application to monitor a typically 60 Hz frequency. Where can I find instructions to properly calibrate this transducer Have you heard of this transducer having an issue with drifting
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by  Tony HodgesJump to last post
07/17/2014 12:01 PM
0 Replies and 2760 Views CR8320-1600  2760  0 Started by  Horacio Estabridis Hello, I just like to know the parameters tolerances for this part Thanks
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07/09/2014 10:14 AM
0 Replies and 2484 Views Maximum Input Current  2484  0 Started by  Kristin Chew Hi, May i know what is the maximum input current for CR4850-500 Will it get burnt if i connect my aircond of 4A as a load for example Thanks Regards, Kristin
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07/07/2014 9:07 AM
0 Replies and 3130 Views cr8350-2000  3130  0 Started by  David Porat what are the accuracy and percent errors of CR8350-2000
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06/17/2014 12:21 PM
1 Replies and 3182 Views Input Impedance of two voltage sensors  3182  1 Started by  Michael Clarke Hello CR Magnetics. We're looking for the input impedance values for the CR4580-250 AC voltage and CR5320-600 DC voltage sensors. The purpose is to determine how much voltage loss we expect in certain lengths of input sensor wire. Thanks very much, Michael, Kingston Ontario, Can.
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by  Tony HodgesJump to last post
06/04/2014 8:49 AM
1 Replies and 2167 Views cr4395  2167  1 Started by  Bill Napier I would like to use multiple external current transformers all looping through the 4395. My question is this: if the relay is rated 1-10 amps, and multiple motors are running through multiple external current transformers add to more than 10 amps, how will this effect the 4395 Thanks.
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by  Tony HodgesJump to last post
05/22/2014 2:10 PM
3 Replies and 2226 Views CR4395 - Wound rotor motor plugging relay  2226  3 Started by  Sylvain Raymond We would like to use a CR4395 to limit plugging torque on a wound rotor motor. During plugging (commanding the opposing rotating direction) the output relay would drop on overcurent, preventing the secondary accelerating resistors from being shorted (and limiting the counter torque at the motor). The frequency at the rotor varies from very low frequency at nominal speed to 120Hz at start of plugging. Plugging inhibit is removed as the motor passes through zero speed and the rotor current freq...
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by  Tony HodgesJump to last post
05/12/2014 9:20 AM
1 Replies and 2424 Views Nuisance trip with CR4395  2424  1 Started by  jyothish rk Hi, We are facing problem using CR4395.The problem is with the tripping time. The part no of the current sensing relay that we are using is CR4395-LH-120-110-B-CD-ELR-I. The tripping time that we set is usually around 3 or 4 seconds, but due to motor inrush current the relay trips immediately.Our doubt now is, whether the tripping time dial, provided in the model is for setting the inhibit time or the delay for the relay to actuate in case of fault or is common for both. Or is it that, we ar...
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by  Tony HodgesJump to last post
10/29/2013 10:39 AM
1 Replies and 2310 Views Help choosing the right part  2310  1 Started by  raj aryan 1. I am using CR8348-2500-N 2. My input current is 0.1A to 2A typical. 3. I would like to get DC voltage out to my microprocessor. Preferably 0.1V for 0.1A. can i get better range 4. Can you recommend a ckt to get the above. 5. What should my burden resistor be
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by  Will LowesJump to last post
10/02/2013 2:16 PM
1 Replies and 2312 Views Help in choosing current switch  2312  1 Started by  Mark Prairie I have attached a diagram showing the application of a Magnacraft brand of current sensing relay. This circuit is intended to control an electric pump with the operation initiated by the momentary push button with the motor current maintianing operation until the current drops due to lack of water for the pump. Motor data: Full load current 9.9 amps, No load (no water) current 1.8 amps. Start current 37 amps. The Magnicraft uses a shunt for sensing and is prone to failure. What product ...
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by  Tony HodgesJump to last post
08/29/2013 10:17 AM
3 Replies and 2021 Views Preventive Maintenance  2021  3 Started by  Johann Jiménez Please can you give me which is the appropriate preventive and predictive maintenance or the maintenance instructions appropiate for: - VOLTAGE TRANSDUCER CR MAGNETIC 4520-24 - VOLTAGE TRANSDUCER CR MAGNETIC 5320-50 Thank you.
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by  Tony HodgesJump to last post
08/23/2013 10:49 AM
1 Replies and 2022 Views Question on CR6260-500-5 Output Range  2022  1 Started by  Kalam Puckett We purchased the CR6260-500-5 to monitor the power of a 230V/3Ph motor with a power factor of 74. I'm trying to determine the range of the 4-20ma output of the transducer. I'm making the assumption that 4ma (zero) is wattage at 0vac/0amps and 20ma (span) is wattage at 500vac/5amps. Then I'm thinking that the power factor would be applied in our DCS. Am I on the right track or totally off Thank you in advance. Kalam Puckett Xcel Energy
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by  Tony HodgesJump to last post
08/23/2013 9:41 AM
5 Replies and 2203 Views current sensing relay  2203  5 Started by  Jon Beaumont Hello, I am trying to come up with a system that can sense current lose in heaters. I was thinking that a current sensing relay would be ideal...using the relay to turn on LED lights to inform operators of a heater lose and thereby possibly saving a run...this application would be on an autoclave, I'm just concerned that the heaters basically turn on and off to maintain temperature during process an that this would cause false alarms, also the autoclaves themselves do not run 24hrs a day...how w...
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by  Tony HodgesJump to last post
08/15/2013 10:54 AM
1 Replies and 2144 Views CR6240-500-50 question  2144  1 Started by  Tim Yau Hi, I'm trying to add a CR6240-500-50 inside an Allen Bradley MCC bucket. Due to space constraint, the transducer is mounted after the overload relay. Should I feed pin 1, 2, and 3 of the transducer with 3-phase 480VAC after the overload relay (see Option1) or after the circuit breaker (see Option2) My concern is if the starter is off, would the transducer still be generating the 4mA output I'm not sure if the transducer needs the 480VAC to generate its 4-20mA output or if it's sole...
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by  Tony HodgesJump to last post
08/06/2013 3:42 PM
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