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