At UL training for 61010-1, the trainer stated that software could not be used to prevent an electrical or shock hazard unless the software was designed and documented to certain other safety standards. For example, such software could not be relied upon to sense that a door was open and turn...
I am designing a piece of machinery for factory production of electronic parts. I have always been taught that it is "bad" to have unbalanced 3 phase loads, but my supervisor has suggested that I steal power frr the 120V circuits off one of the phases of the 3 phase input.
My supervisor is not...
I got tasked to build a suitcase demo for our marketing guys. Absolutely has to go to layout tomorrow evening. There is no time for a micro.
-I have 4 discrete inputs which must be mapped to 5 digital outputs...this is not high speed at all..the inputs come from analog comparators.
-The outputs...
I am using an emergency stop controller. When the emergency stop control is triggered, the output from the control should open a 2 pole contactor carrying split-phase 240VAC and a 3 pole contactor carrying 3ph power. Because I cannot find an e-stop control with any pilot duty ratings (ie UL508...
We have a piece of equipment with 480V 3phase (no neutral) and 240 L1/L2 running into it for a total of 5 wires. Isn't there some rule that you have to break all 5 ungrounded conductors with one disconnection switch, instead of having one switch for the 240V and another switch for the 480V...
We are designing a piece of equipment that will have a UL nameplate rating of 24O VAC because this is standard voltage at all of our customers. However, the equipment will contain a motor with a 230VAC on its nameplate because we cannot find a UL-recognized motor at 240VAC.
Past experience...
We are making a piece of equipment that will be certified to UL-610101-1 for North America. We also want to sell it Singapore.
We cannot find any Singaporean rules with the same purpose as the low-voltage directive or machinery directive for EU. We have only found they require an SG product...
Does anyone have a pointer to app notes or papers which goes through the necessary requirements to put Chinese Japanese Korean fonts on a display. I am looking for a complete document which describes everything from the different dialects of each language, to the minimum number of characters...
I have to choose a motor for a conveyor, but I cannot make the choice until I have measured torques with the conveyor belt fully loaded. So I have to get the conveyor in house first.
1) Is there some NEMA or IEC standard that defines how the motor/gear is coupled to the conveyor ?
2) Has...
Could someone recommend a primer in order to help me answer the following question. My background is analog circuit design for data acquisition and embedded programming.
I need to specify a motor to operate a conveyor. Torque and ratings are TBD However this is known:
-the motor is enclosed in...
