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What does 1 way, 2 way and intermediate light switching mean?

There are 3 basic types of switches that are used for domestic purposes: 1 Way Switches: If a light switch is ‘1 way’ this means it is just an on/off switch. This is the simplest type of switch that you can get. The single switch controls a single light (or lighting circuit). 2 Way Switches: A ‘2...

Are there any standards for sizing the neutral/PE bars?

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...

How to upload and convert a Modicon Micro 110CPU612xx Modsoft application to Unity.

Use the following steps to upload the application using Modsoft: Start Modsoft. Click on Transfer Select 'PLC to File'. Select 'New Program'. Type in a filename. Hit ENTER Type in a location for saving the application or just use the default location. Hit ENTER Type in the Modbus...

What are the G1, G2, G3 and Gx classifications for the ANSI Standard, ANSI/ISA S71.04-1985, “Environmental Conditions for Process Measurement and Control...

The G3 specification references the ANSI Standard, ANSI/ISA S71.04-1985, “Environmental Conditions for Process Measurement and Control Systems: Airborne Contaminants,” . The G reference refers to the severity and classification of the test and it can be G1 (Mild, Moderate, Harsh and Severe (G1, G2,...

How to recover from Windows services that is stuck in starting or stopped state?

Issue When an attempt is made to stop or start a Window service it may get stuck in stopping, starting state or prompts with Error 1053: The service did not respond to the start or control request in a timely fashion. Product Line ION Enterprise 6.0, Power Monitoring Expert 7.x, 8.x, 9.x...

What is the earth fault impedance?

Earth fault loop impedance is the path followed by fault current when a low impedance fault occurs between the phase conductor and earth, i.e. “earth fault loop”. Fault current is driven round the loop by the supply voltage. The higher the impedance, the lower the fault current will be and the...

What is meant by vector group for transformers and why is it important?

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 configurations of three-phase transformers. The vector group designation indicates the windings...

How can I calculate the dissipated power (heat loss) inside a Blokset panel?

The amount of heat loss depends on the constituents of the panel (horizontal busbars, vertical busbars, circuit breakers, capacitors for power factor correction...etc). According to the heat dissipated from the panel. The attached calculator is a spread sheet used to calculate the heat loss in...

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Popular Video FAQsPopular Videos
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Learn more through our Generic Knowledge FAQsGeneral Knowledge
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 breaking current is the RMS value of AC component of short circuit current at the instant of separation...

Apa alternatif replacement battery UPS SURT15KRMXLI jika APCRBC140 tidak ready stock?

Apa alternatif replacement battery UPS SURT15KRMXLI jika APCRBC140 tidak ready stock? ======================================================================= Untuk alternatifnya bisa menggunakan battery pack type SURT192XLBP sebanyak 2 sets, karena didalam 1 set SURT192XLBP terdapat 2 sets battery...

In a 3 phase system, why does the meter still show voltage reading on one of the phases even after breaking the phase circuit?

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...

What is Power Factor Correction (PFC) - Does it help conserve energy?

Issue: What is Power Factor Correction (PFC) - Does it help conserve energy? Answer: 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 indirectly lead to...

Which RL(lead resistance from CT to relay) is to be used in Knee Voltage calculation if Current Transformers (CTs) used in High Impedance Restricted Earth...

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...

What is an Electrical "Ground Loop" - How does it affect my equipment?

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...

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 pipe. When you turn on a faucet, the water pressure makes the water flow out. Similarly, voltage...

What is the selection criterion of Circuit Breakers for the Capacitor bank application.

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 factor of 1.5In Where In = Q/ ( Square root of 3 ) Un Q = Capacitor Power Un = Nominal Voltage...

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