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My question is about Heat shrinks method used in covering control wires for indoor installations , is it an acceptable standard method according to Canadian Electric Code ?

How can I know the subtransient reactance for an induction motor if it is not mentioned in the motor data sheet ?

DO these types of motor (Line Started Permanent Magnet ) can work efficiently with VFD ?

I was thinking to install the two check wires in parallels to be connected to the Zener diode inside the pump from one side and to the relay from the other side .

Well, you mean that even if we will install two cables , the zener and relay should be connected to only one cable ( one of the two cables ) ?

Hi all collogues, We are installing a 5.6 volt Zener diode connected to ground inside a junction box of a motor for GROUND CHECK purpose , this Zener diode has its own wire inside the power cable ( GC wire )and then this wire should be connected to a ground fault monitoring relay in the...

Thanks all for your inputs, I found this formula and it seems simple to use and applicate : Starting time = ( moment of inertia x rpm ) / ( 9.55 x acceleration torque ) -where acceleration torque = 1.5 motor torque – load torque Not sure it is the same above or maybe similar.

Thanks, motor starting time mainly depends on the load torque so I wonder if there is a table or a chart that can figure the approx. starting time for each load type. my answer to your question why ? this is to know the exact time setting for the vfd parameter " run0up time "

I need a simple formula I can use to calculate the starting time for induction motor to be set up into VFD parameter in a correct way not random selection

Thanks for the reply , thinking about (e) as well but not sure what is meant by liquids not more hazardous than water ? for ( i) : talking about hot oil piping , the lubrication system consists of pipes, fittings , vessels ( reservoir )shall this apply to ? for ( m) : no mention for pressure or...

A lubrication system for pumps using oil working pressure = 35 psi , does it require CRN ? in which category the oil can be exempted / classified as per the technical standard and safety act ? as Hydraulic fluid ? or oil for non-fuel application ? or liquid not more hazardous than water ?