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What is meant by thermal current rating (Ith) for Contactor "D" or "F"...

It means the rated current that this contactor can switch for Load category AC1 (thermal loads), Example: LC1D09 is 9 A on AC3 and its thermal current (Ith = 20 to 25 A) (this means it can switch up...

A 415V motor, class F insulation with dv/dt capability of 1 KV/μS, Can can...

Generally the motor with Class F insulation is considered as VFD graded motor, but it is specified that the dV/dT withstand capacity is 1 KV/μS. Hence we can not consider this motor as VFD graded...

What is the difference between flush and non flush mountable sensor ?

The difference between flush and non flush mountable sensor is as below : Flush-style sensors actually have a shield that restricts the magnetic field so that it only radiates out of the face of the...

Can we use RCBO as sub-main breaker to protect outgoing breakers instead...

Yes you can use RCBO as a replacement to MCB and RCB. In general, RCBO is basically circuit breaker in addition to residual current device. It provides over current, short circuit as well as earth...

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What is meant by Symmetrical and Asymmetrical breaking currents?

issue: Customer wants to know the value of the symmetrical and asymmetrical breaking current of the circuit breaker and what do they mean. Environment: Circuit Breaker Resolution: - Symmetrical...

Why are some products double coded with two IP ratings (like IP65 / IP67)?

The second characteristic numeral in an IP designation indicates the degree of protection provided by enclosures with respect to harmful effects on the equipment due to the ingress of water. 5 =>...

Can I install bypass contactor for Altivar process drives?

Bypass contactors are not supported by ATV process LV drives (ATV600, ATV900). It is not possible to bypass the drive by external contactors because there is no synchronization of output voltage with...