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Welcome to the Schneider Electric Website

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What does Internal Arc Classification A-F, A-FL and A-FLR mean?

Internal Arc Classification IAC A-F, A-FL and A-FLR are defined in IEC 62217-200 and help to define internal arc performance of medium voltage or high voltage switchgear. The following definitions...

What is the difference between Class 0.5 and Class 0.5s for Current...

For Current Transformers: Class 0.5s is more accurate when you got low values of current. For class 0.5s and with a current between 1-5% In, you got on class 0.5s a 0.75% error. For class 0.5 and...

What is the maximum earth loop Impedance Zs value for the circuit breakers...

The maximum earth loop Impedance figures can be found on the attached pdf files. 16A to 250A The standard MCCB's used for ratings of 16A to 250A with part numbers beginning with...

What is the definition of the dials/ selector switches of the Micrologic...

Standard IEC 60947-2 defines the names of the selector switches. The meanings of the screen-printed items on the selector switches of the trip units are: Ir: adjustment of the long time (or thermal)...

What is the difference between AC-7a and AC-7b when choosing a iCT...

These utilization catagories determine what load the contactors are switching: AC-7a are for slightly inductive loads for household appliances for example mixers and blenders AC-7b are for...

Why is the kW (Active Power) showing a negative reading on the Powerlogic...

A negative kW reading is usually due to one of 2 things The Current transformers (CT's) have been fitted onto the cable or busbar the wrong way round. The P1 side of the CT should be towards the...

What size overload do I use with a star delta starter ?

In the majority of cases, the overload of a star delta starter is fitted below the delta contactor with wiring connections to one side of each of the motor windings. The other side of the windings...

What are the differences between 380v AC, 400v AC and 415v AC Mains...

For many years, mainland Western Europe has used a mains, 3 phase, electricity supply nominally rated at 380v AC 50Hz while the UK used 415v AC 50Hz. Currently, all Western European 3 phase supplies...

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Learn more through our General Knowledge FAQsGeneral Knowledge

Apa alternatif replacement battery UPS SURT15KRMXLI jika APCRBC140 tidak...

Apa alternatif replacement battery UPS SURT15KRMXLI jika APCRBC140 tidak ready stock? ======================================================================= Untuk alternatifnya bisa menggunakan...

How to identify the M172 that I am using in the program?

In order to identify in our code which M172 model we are using we need to use the two (2) internal variables located in "Operators and blocks". The variables are Par_POLI (Polycarbonate...

Which is the software to program the Modicon M171O (Optimized)?

The software to program the Modicon M171O (optimized) is EcoStruxure Machine Expert HVAC. The software can be downloaded from our website:...

What is the difference between PNP and NPN when describing 3 wire...

Most industrial proximity sensors (inductive, capacitive, ultrasonic and photo electric) are solid state. The term solid state refers to the type of components used within the sensor. Solid state...

Voltage, Current and Resistance Explained

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...

What are the differences between 220VAC, 230VAC and 240VAC Mains Supplies...

For many years, mainland Western Europe has used a mains electricity supply rated at nominally 220VAC 50Hz while the UK used 240VAC 50Hz. In 1994, the European Union state members decided to proceed...

What are the differences between 380v AC, 400v AC and 415v AC Mains...

For many years, mainland Western Europe has used a mains, 3 phase, electricity supply nominally rated at 380v AC 50Hz while the UK used 415v AC 50Hz. Currently, all Western European 3 phase supplies...

What size overload do I use with a star delta starter ?

In the majority of cases, the overload of a star delta starter is fitted below the delta contactor with wiring connections to one side of each of the motor windings. The other side of the windings...

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