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Issue: How to calculate the heat dissipation in BTU per hour Product Line: All Schneider product lines Cause: The calculation to determine the BTU for adding a piece of equipment to a cabinet to...
IEC 60947 define ICS as the "rated service short-circuit breaking capacity" while ICU as the "rated ultimate short-circuit breaking capacity". The Ics is a percentage of Icu. For...
The earthing schemes and sizing differ according to the earthing scheme (TT,TN-C,TN-S,IT...etc). According to the required earthing scheme, you should size your earthing and neutral conductors. IEC...
Protection used to check that remanent voltage sustained by rotating machines has been cleared before allowing the busbar supplying the machines to be re-energized, to avoid electrical and mechanical...
The bottom span 4 mA expresses a minimum signal value than a broken wire. Since the loop current never falls to zero, it can be loop powered, allowing for a two-wire circuit. 20 mA is considered an...
Altivar process has integrated DC choke (in fact 2 of them). Altivar Process is compact drive design by SE to comply the IEC61000 - 3 standard with out using any external line or DC choke. The...
What is vector group for transformers? A vector group is the International Electrotechnical Commission (IEC) method of categorizing the high voltage (HV) windings and low voltage (LV) winding...
Phase-to-phase short-circuit protection, for generators. The current tripping set point is voltage-adjusted in order to be sensitive to faults close to the generator which cause voltage drops and...
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...
Issue: Testing phase loss on a meter doesn't result in a null voltage reading. Environmnet: EasyLogic Series Power Meters PowerLogic Series Power Meters Resolution: The voltage seen is what we...
The selection should be done after derating the Circuit Breaker taking into consideration voltage variation and capacitors tolerances that could increase nominal current up to 1.5In. The Derating...
