Detection of phase-to-earth faults on 3-phase windings with earthed neutral, by comparison of residual current calculated from the 3 phase currents and residual current measured at the neutral point. Characteristics instantaneous tripping percentage-based characteristic with fixed slope and...

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 prevent overheating. Resolution: To calculate heat dissipation, multiply watts by 3.4192. The result...

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 transients.

Yes, Easypact MVS/CVS can be used in Prisma P panels while Easypact CVS can be used in either Prisma P or Prisma G panels. Please find attached test certificates mentioning the same. There is one condition we must consider in order to comply with the certification. We must use Masterpact NW front...

ProDiag Breaker is a Schneider Electric diagnosis tool. ProDiag Breaker compares the mechanical and electrical parameters measured during the full operation of circuit breakers with the data collected from our production facilities. This allows detecting possible failure in advance. It measures,...

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 intrinsically safe signal in most locations. Elimination of the voltage drop errors results from long...

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 standard 60364-5-54 illustrates how to size a protective earthing (PE) and neutral conductors. This...

The answer will be provided in an orderly manner, first Compact NSX MCCBs, then Compact NS MCCBs and finally Masterpact ACBs. 1. The Compact NSX breakers are UL listed according to UL508 for Manual Motor Controllers in file E186495. The correct term when dealing with UL is "listed", not...

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 breaking current is the RMS value of AC component of short circuit current at the instant of separation...

There is often confusion between the in-phase and the In-sync features of ASCO transfer switches. It is important to understand the difference between these features especially during the process of selecting transfer switches for different applications. In-Phase The in-phase monitor is a feature...

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 call "phantom voltage", its a known phenomenon with all high impedance power meters. These phantom...

Issue: What is an electrical "ground loop" and how does it affect my equipment? Environment: Ground loops can occur in any situation where multiple electrical devices are interconnected, especially when those devices are powered from different sources or located in different places with varying...

Issue: Having two different values for RL ( Lead resistance from the CT to the relay); RL from the phase CT to the relay and RL from the neutral point CT to the relay Environment: Protection Function ANSI 64ref High impedance differential Sepam 80 Current Transformer requirement Resolution: In any...

Issue: How do I remember the relationship of voltage, current and resistance in an electrical system? Environment: N/A Solution: Voltage (unit of measurement - volt) is like the water pressure in the pipe. When you turn on a faucet, the water pressure makes the water flow out. Similarly, voltage...

Register the Easy UPS with APC by Schneider Electric customer support. This is a one time process required to be done only during initial installation. The Easy UPS output cannot be turned on without successfully completing registration process. After successful completion of the registration...

Issue: What is Power Factor Correction (PFC) - Does it help conserve energy? Answer: Explanation 1: Power Factor Correction (PFC) doesn't directly reduce the overall electric consumption of a device or system, but it does play a role in optimizing the efficiency of electrical systems, which can...