0
hii due to the following cause it ocuurs
(1) Dirt (on the disk; in the air
gaps)
(2) Magnetic particles (in the per-
manent-magnet air gaps).
(3) Gummy oil and/or dirt in bear-
ings.
(4) Broken jewels.
(5) Disk rubbing in air gap.
in which
(6) Improper mesh of gears or dirty
gearing.
(7) Improperly adjusted bearings.
(8) Vibration of the meter mount-
ing.
(9) Creeping.
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∙ 12y ago
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How much error is acceptable in analog PF meter?
Old type, analog power factor meters may be considered 2% instruments.
How do digital electric meters work?
measures amount of electricity usedIt depends on what kind of meter you are talking aboutone meter is on the side of your house witch measures how much eletricity you use.another kind is a voltage meter witch can tell you how many volts, amps,watts,and ohms are being pumped through a eletrical wire.AnswerWhat is colloquially known as an 'electric meter', or 'electricity meter', is correctly termed an energy meter. As the name implies, an energy meter is used to measure the amount of energy (not 'electricity', which is not a quantity!) purchased from the electricity supply company for the purpose of billing its customers. This energy is measured in units called kilowatt hours (kW.h) and, for this reason, energy meters are sometimes referred to as 'kilowatt hour meters' or 'watt hour meters'.
How do you calculate multiplying factor in 3 phase 4 wire energy meter?
mf is ratio of CT ration of meter box to CT ration written on meter. ex: CT meter box: 30/5, Meter ct ration 1/1. MF : (30/5)/(1/1)= 6
What to read from electricity meter i have following readings 1. Positive active energy A plus total kWh 2. Negative active energy A- total kWh 3. Absolute active energy A total kWh?
Electricity Meter. I've never heard that term. The other terms are also foreign to me and I have been using measuring equipment for over 40 years. I have never seen a meter that will actually show kWh. An electrical USE meter (like what is on your home) shows kWh used. More explanation in the question would help.
What height does Tom Daley dive from?
He normaly dives from 10m meter platform. He does both single and syncro. In minor compotitions he will sometime compete in syncro 3m springboard
What are different types of error in energy meter?
Fast and slow error based on the formula stated below: Accuracy(%) = (EDUT - EREF)/(EREF)*100 EDUT - Energy recorded/seen by Device Under Test EREF - Energy recorded/seen by Reference Standard
What are shading bands and why are they provided in energy meters?
shading bands are used to increase the magnetic field in shunt magnet in single phase energy meter. They also used for reduce the friction error.
What do you mean by phase error in induction type energy meter?
IT means when torque is not zero even at zero power factor?? are you in IPU??
What are the safety precautions when installing a single phase energy meter?
If you do not know, and wish to stay alive, employ a qualified electrician :)
How would a three phase meter reading compare to three single phase meters connected to the same service?
The reading on the 3-ph meter would equal the sum of the three separate readings on the single-phase meters. The neutral sides of the single phase meters do not need to be connected to the neutral wire as long as they are connected together.
Is watt meter the other name of energy meter?
A wattmeter measures power, which is the rate of doing work, expressed in watts.An energy meter measures the amount of energy consumed, usually in kilowatt hours.The meter on the wall of your house is an energy meter.
What is the percent error of an error of one meter in a kilometer?
0.1%Work is shown here:What_is_the_percent_error_of_an_error_of_1_meter_in_a_kilometer
How do you calibrate single phase energy meter by phantom loading?
The phantom loading is that no external load is connected in actual sense and the current and pressure coils are connected seperatly so that it will consume only less power. In this connection the voltage across pressure coil will be supply voltage even if the variac is in minimum position. CONNECTION Connect a single phase supply through a single phase variac. Connect the currect coil of wattmeter M and energy meter c1 and an ammeter in series to phase terminal of singlephase variac. The pressure coil of both wattmeter and energymeter should be shorted and connected to phase of supply (not to the variac). The terminal V of wattmeter and p2, c2 of energy meter should be connected to neutral terminal of variac. PROCEDURE Keeping the variac in minimum position and switch on supply. Adjust the variac to get different reading in ammeter and note the time for 5 Revolution of energy meter disc and obtain the wattmeter reading. FORMULAE %error = (R.E - A.E)*100/A.E , WHERE, R.E is the recorded energy = n/N (n=5 & N=energymeter const.) A.E is the actual energy A.E= (wattmeter reading*time)/(3600*1000) while plotting a error graph it will be having a zig-zag shape. Normally the error can be upto 10%. Winston Netto SSET-SCMS Engineering college.
Why is my true result meter showing a e-4 error?
According to the handbook, it is a meter error and you should call the toll-free number given on the box or inside the handbook. They will probably send you a new meter.
Why three phase meter is better than single phase meter?
A three-phase meter can be used for single phase while the reverse is not the case.
What is meant by creeping in energy meter?
Hii creep is a phenomenon that can adversely affect accuracy, that occurs when the meter disc rotates continuously with potential applied and the load terminals open circuited. A test for error due to creep is called a creep test.
How energy meter works?
eletrical energy into mechanical energy
