FINAL YEAR PROJECT SEMESTER 2/2013

Analouge Meter

 

 For some reason, i have to change the from digital meter to analogue meter due the high cost of digital meter. It is about RM 1+++. Actually there is no different with digital meter as long as i can get the same accurate output at the display.futhermore in my project using rotation sensor which is more suitable using analogue meter.

For some reason, i have to change the from digital meter to analogue meter dGeneral Description

• The Single-phase Kilowatt-hour Meter Type DD28 is an instrument of induction type, used for measuring the singlephase.A.C. energy of rated frequency 50Hz.The instrument is novel design, attractive appearance, compact and sturdy construction. The instrument features high.accuracy, over wide load range and a long service life. All the components of this meter are of selected material and the metal ones electroplated or finished with baking enamel. The casing and terminal block with gasket are properly treated against mould, moisture and dust.

Technical Characteristics
a. Sensitivity
When the meter is running with 0.5% rated current at rated voltage and frequency and unity power factor, the rotor willrotate ceaselessly.

b. Running with No Loading
With no current in the current circuit, the rotor will not make a complete revolution at any voltage between 80% and110% of rated voltage.

c. Power Consumption
With no current in the current circuit, the power consumption of the voltage circuit is within 1.5W at rated voltage and frequency.With rated current circuit, the power consumption of the current circuit is within 2VA at rated frequency.

d. Insulation Test
With the specified ambient temperature and relative humidity below 85%, the insulation between the casing and all the circuits can withstand a test of 2kV, 50Hz for 1 min.