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What is the difference between voltage restrained overcurrent protection and voltage controlled overcurrent protection?
Voltage restrained overcurrent protection uses a fixed voltage threshold to trip the protection device when an overcurrent condition is detected. In contrast, voltage controlled overcurrent protection adjusts the trip threshold based on the system voltage level, allowing for more precise coordination with other protective devices and better protection of the equipment. The key distinction lies in the method of setting the trip threshold: fixed voltage for voltage restrained, and voltage-dependent for voltage controlled overcurrent protection.
What minimum size-grounding conductor is required if the circuit protection ahead is rated at 500 amps instantaneous?
For a circuit protection device rated at 500 amps, the minimum size of the grounding conductor is typically determined by the National Electrical Code (NEC) tables. According to NEC Table 250.122, for a circuit with overcurrent protection of 500 amps, the minimum grounding conductor size required is 3/0 AWG copper or 250 kcmil aluminum. Always ensure to check local codes and regulations, as they may have additional requirements.
Can you use transformer for DC supply?
No. Only Transformer could not be used for DC supply.If yoy need to have DC out put,then rectifier unit required .
Why line voltage at the secondary of transformer is above the required value?
ewan ko...................... ikaw ba alam mo
What is the current in 1KVA Transformer?
Tis question is incompleet.1000 va =1 kva.This is the power capacity of transformer. A transformer having 2 currents Primary current and secondary current . for that we required both voltage. Simply we can calculate by a formula Voltage x Current x 0.8(power factor)=1000.
What is the difference between voltage restrained overcurrent protection and voltage controlled overcurrent protection?
Voltage restrained overcurrent protection uses a fixed voltage threshold to trip the protection device when an overcurrent condition is detected. In contrast, voltage controlled overcurrent protection adjusts the trip threshold based on the system voltage level, allowing for more precise coordination with other protective devices and better protection of the equipment. The key distinction lies in the method of setting the trip threshold: fixed voltage for voltage restrained, and voltage-dependent for voltage controlled overcurrent protection.
Ring final circuits in domestic properties usually require a protective device which is rated at?
According to BS7671:2008, Requirements for Electrical Installations, an overcurrent protection device rated at either 30 A or 32 A is required.
What size overcurrent protection device is required to protect the secondary of a three phase 75kva and 208 v transformer supplying a 150 amp continuous load?
If you're asking about load sizing, I think you already have the answer (at least 150A, although you could go up to 208 for full load, and maybe higher if you can overload the transformer). If you're talking about short circuit rating, you have entirely the wrong information. Short circuit rating will tell you if the fuse (if you're using fusing) mounting is rated to interrupt the available fault current.
Can a water sprinkler system be used for transformer fire protection?
Yes, there is a well-defined standard for "water-mist" sprinkler systems for protection of electrical transformers and switch-gear, including required minimum spacing according to the voltages present.
What is the KVA rating required of the testing transformer?
Depends on the kva rating of the devices to be tested using a transformer.
What minimum size-grounding conductor is required if the circuit protection ahead is rated at 500 amps instantaneous?
For a circuit protection device rated at 500 amps, the minimum size of the grounding conductor is typically determined by the National Electrical Code (NEC) tables. According to NEC Table 250.122, for a circuit with overcurrent protection of 500 amps, the minimum grounding conductor size required is 3/0 AWG copper or 250 kcmil aluminum. Always ensure to check local codes and regulations, as they may have additional requirements.
What are the purposes of performing no load test for the transformer?
These two tests are performed on a transformer to determine (i) equivalent circuit of transformer(ii)voltage regulation of transformer(iii) efficiency of transformer. The power required for theseOpen Circuit test and Short Circuit test on transformeris equal to the power loss occurring in the transformer.
How much oil in liters required for sealed type 95 KV 1200mA - TR Set transformer?
That depends on the model of the transformer. I have seen transformers that required 7500 liters and some that needed 2,5 liters.
What are the components required for charging mobile using sound energy or noise?
transformer
Can you use transformer for DC supply?
No. Only Transformer could not be used for DC supply.If yoy need to have DC out put,then rectifier unit required .
Why zigzag connection in transformer is required?
A zigzag transformer is used in connection with 3 phase and is made up of 6 coils connected in a "Y" manner. Each leg of the "Y" is made up of a coil on a different phase leg of the transformer. The neutral formed by the zigzag connection is very stable. Therefore, this type of transformer, or in some cases an auto transformer, lends itself very well for establishing a neutral for an ungrounded 3 phase system. Many times this type of transformer or auto transformer, lends itself very well for establishing a neutral for an ungrounded 3 phase system. Many times this type of transformer or auto transformer will carry a fairly large rating, yet physically be relatively small. This particularly applies in connection with grounding applications. The reason for this small size in relation to the nameplate KVA rating is due to the fact that many types of grounding auto transformers are rated for 2 seconds. This is based on the time to operate an overcurrent protection device such as a breaker. Zigzag transformers used to be employed to enable size reductions in drive motor systems due to the stable wave form they present. Other means are now more common, such as 6 phase star.
What type of transformer is required for a LED strip light installation?
For LED strip light installations, a low-voltage transformer is required to convert the standard household voltage to the lower voltage needed for the LED lights to operate safely and efficiently.
