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1 Replies and 1892 Views CR3110 with 5ADC to 75ADC  1892  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.
1 1892
by  Tony HodgesJump to last post
07/22/2014 2:53 PM
3 Replies and 2545 Views CR5210-100 Bidirectional IO  2545  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
3 2545
by  Tony HodgesJump to last post
07/17/2014 12:03 PM
3 Replies and 1847 Views CR6620-60-500  1847  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
3 1847
by  Tony HodgesJump to last post
07/17/2014 12:01 PM
0 Replies and 1908 Views CR8320-1600  1908  0 Started by  Horacio Estabridis Hello, I just like to know the parameters tolerances for this part Thanks
0 1908
07/09/2014 10:14 AM
0 Replies and 1749 Views Maximum Input Current  1749  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
0 1749
07/07/2014 9:07 AM
0 Replies and 2339 Views cr8350-2000  2339  0 Started by  David Porat what are the accuracy and percent errors of CR8350-2000
0 2339
06/17/2014 12:21 PM
1 Replies and 1490 Views Input Impedance of two voltage sensors  1490  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.
1 1490
by  Tony HodgesJump to last post
06/04/2014 8:49 AM
1 Replies and 1615 Views cr4395  1615  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.
1 1615
by  Tony HodgesJump to last post
05/22/2014 2:10 PM
3 Replies and 1624 Views CR4395 - Wound rotor motor plugging relay  1624  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...
3 1624
by  Tony HodgesJump to last post
05/12/2014 9:20 AM
1 Replies and 1945 Views Nuisance trip with CR4395  1945  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...
1 1945
by  Tony HodgesJump to last post
10/29/2013 10:39 AM
1 Replies and 1832 Views Help choosing the right part  1832  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
1 1832
by  Will LowesJump to last post
10/02/2013 2:16 PM
1 Replies and 1814 Views Help in choosing current switch  1814  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 ...
1 1814
by  Tony HodgesJump to last post
08/29/2013 10:17 AM
3 Replies and 1565 Views Preventive Maintenance  1565  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.
3 1565
by  Tony HodgesJump to last post
08/23/2013 10:49 AM
1 Replies and 1516 Views Question on CR6260-500-5 Output Range  1516  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
1 1516
by  Tony HodgesJump to last post
08/23/2013 9:41 AM
5 Replies and 1710 Views current sensing relay  1710  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 w...
5 1710
by  Tony HodgesJump to last post
08/15/2013 10:54 AM
1 Replies and 1653 Views CR6240-500-50 question  1653  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...
1 1653
by  Tony HodgesJump to last post
08/06/2013 3:42 PM
1 Replies and 1534 Views CR9580 output conversion  1534  1 Started by  Eric Buchanan I can not find the factors to convert the output voltage into the measured current. Is it simply linear from 0 VDC = 0 AAC to 5 VDC = rated AAC Thanks.
1 1534
by  Tony HodgesJump to last post
07/23/2013 8:42 AM
1 Replies and 1701 Views Difference between CR8348-2000 and CR8349-1000  1701  1 Started by  Sunil Sawant I want to measure 30 Amp inrush (surge) current for 3 secs. I have shortlisted CR8349-1000 and CR8348-2000 for the purpose. Both CTs are rated at 50 Amp. As per datasheet (CR8300 Series.pdf); Vmax rms, Te (typ) and DC Resistance of both CTs is different for same rated current. 1. What is the difference between both CTs from application point of view 2. Which CT is suitable for above mentioned application 3. Are both CTs interchangable in above mentioned ...
1 1701
by  Tony HodgesJump to last post
06/13/2013 8:33 AM
2 Replies and 1765 Views Monitor AC motor Currents on Conveyor  1765  2 Started by  Larry Laster I would like to know the best product available. What we are trying to do is monitor current on a conveyor that has a history of breakage. The idea is to monitor the current of the AC motor into the PLC analog card(0-10)vdc and then stop the conveyor before major damage. The motor is 460 3 phase 15 horsepower 17.22 amps. When starting the conveyor the current rises to 80 amps and once the conveyor is moving the current draw is around 6 amps. We are looking at your model CR4211. Does this require...
2 1765
by  Larry LasterJump to last post
06/07/2013 8:44 AM
4 Replies and 1543 Views CR4395 with CRGFS-100 Application Question  1543  4 Started by  Tim Mik Is there a limit to wire length from a CR4395 Module to the CRGFS-100 Also should shielded cable be used for interconnection Thanks, Tim
4 1543
by  Tim MikJump to last post
06/06/2013 8:52 AM
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