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How do you connect ammeter with ct in single phase?
If it's a split-phase system with centre-tapped transformer, then two ammeters are needed, one on each side.
What is the role of magnetizing current in transformer?
connect 3 - phase supply to transformer primary winding.....keep transformer secondary winding open..... apply 3-phase voltage i.e.400v ac, and measure the amount of current flowing in each phase of the transformer primary winding...this current is the transformer magnetising current..... we can keep multimeters in series with the source....so we can measure directly the current readings.....(keep multimeters in current mode, and generally magnetising current will come in terms of milli amps for 400 v )
What is the current of 1MVA transformer?
This depends on the voltage, and whether it is a three phase or single phase transformer.
How do you determine no load current and core loss of a single phase transformer?
It's easily done if you can measure the power drawn at the normal working voltage but with no load on the transformer (open-circuit secondary). All the power is core loss with the exception of a (very) small amount of resistive loss in the primary winding.
What is phase angle error of current transformer?
The angle between the expected and actual secondary current is known as phase error.
How do you connect ammeter with ct in single phase?
If it's a split-phase system with centre-tapped transformer, then two ammeters are needed, one on each side.
How many 16 Amps per phase welding outlet can you install to a 30 KvA rating transformer?
..the questions does not say wether the 30kVA transformer is 3 phase transformer or single phase transformer..but it is implying that a single phase welding load at 16A per phase is to be connect to it, it is assumed then that the transformer is 3 phase transformer..we assume load is rated 240V.. ..though not much details is given about the transformer voltage specs. but if is rated 3 phase 415/240V, the approx full load current per phase is given by 30KVAx1.3912=41.736A.. ..but if the transformer was rated single phase 240V say, the approx full load current FLC=30000/240V gives 125ampers.. ..if you further devide the FLC by the intended load current.. ..Recommended no of welders per for a 3 phase 415V transformer and assuming single welding sets =41.736/16=2.6..so you can connect max two welding sets to this transformer per phase,..max 6 weld sets can connect at an approx load factor of 76%.. ..for the single phase transformer, FLC/16=125/16, gives 7.8 but is also recommended not to connect more than 6 welding sets to such transformer for the same reasons..
What is ammeter selector switch?
A selector switch is normally used in a place to avoid 3 ammeters usage and instead measuring current in all the 3 phases using 1 ammeter only. Motto: SAVE MONEY.. :D The selector switch provided for ammeter is to check the amount of current taken from each phase supply. (ie) R,Y and B. Each phase supply should be covered with a current transformer with the rated amps capacities. The two leads of the the each phase CT are connected to the respective leads in the selector switch of the ammeter.
What is the role of magnetizing current in transformer?
connect 3 - phase supply to transformer primary winding.....keep transformer secondary winding open..... apply 3-phase voltage i.e.400v ac, and measure the amount of current flowing in each phase of the transformer primary winding...this current is the transformer magnetising current..... we can keep multimeters in series with the source....so we can measure directly the current readings.....(keep multimeters in current mode, and generally magnetising current will come in terms of milli amps for 400 v )
What is the current of 1MVA transformer?
This depends on the voltage, and whether it is a three phase or single phase transformer.
How do you zero phase current tranformer test?
How do you zero phase current transformer test
How do you find out magnatising current of transformer?
apply 3 phase voltage(415V) to the winding whose magnetising current is to be found and open circuit another winding. now measure current using tong tester or connecting an ammeter in series between supply and winding.
Does a clamp-on ammeter measures voltage?
No, it will only measure the current through a single phase.
How do you connect an earthing transformer with delta connected secondary?
You have to connect each phase (R,Y & B respectively) of earthing transformer zig zag winding to each phase of power transformer delta secondary respectively. Then the zig zag winding of earthing transformer star point to be earthed.
How do you determine no load current and core loss of a single phase transformer?
It's easily done if you can measure the power drawn at the normal working voltage but with no load on the transformer (open-circuit secondary). All the power is core loss with the exception of a (very) small amount of resistive loss in the primary winding.
What is phase angle error of current transformer?
The angle between the expected and actual secondary current is known as phase error.
How do you measure the circulating current in 3 phase parallel system?
The clamp on amp meter has to go around both of the parallel conductors to get an accurate reading of the line current. If you are using a current transformer, both wires have to go through the centre hole in the transformer.
