11 kV INDOOR METERING SET

11 kV INDOOR METERING SET

1. Name and address of Manufacturer : Twiclo Electrical Industries, Raipur
2. Type :  Outdoor, Oil filled, Vacuum Impregnated : MOD/CB
3.  Nature of service :  Outdoor *
4.  Type of Cooling :  ON *
5.  System characteristics :
     a. Rated system voltage :  11 kV
     b. Highest system voltage :  12 kV
     c. Rated system frequency :  50 Hz
6.  Oil
     a. Specification :  To IS 335 *
     b. Quantity for First Filling :  Approx. 60 liters.
7.  Total weight with oil :   Approx. 200 Kgs.
8.  Outline dimensional drawing with mounting details :  As per drawing
9.  Mounting Details :  As per drawing
10.  Overall dimensions :  As per drawing
a.) Voltage Transformer
1.  Rated voltage ratio :  (11000) / (110) *
2.  Winding Connections :  Star-Star
3.  Rated Burden :  10 VA *
4.  Class of Accuracy :  0.2*
5.  Rated voltage factor and time :  1.2 continuous *
6.  Limits of ratio and phase error :  Within limits specified by IS
7.  Temperature rise of top oil at 1.2 times rated primary voltage with rated secondary :  Within limits specified by IS
8.  H.V. Bushing Characteristics
     a. Type :  Outdoor/ Indoor, Glazed Porcelain *
     b. Make :  Suitable indigenous
     c. Electrical characteristics :  To IS 2099 / 1996 *
9.  One-minute power frequency withstand test on primary winding kV rms :  28 *
10.  One-minute power frequency withstand test on secondary winding kV rms :  3 *
11.  High voltage impulse withstand test on primary windings kV peak :  75 *
12.  Reference specification to which the equipment conform :  IS 3156 / 1992
b.) Current Transformer
1.  Rated Voltage/Highest Voltage :  11 kV / 12 kV *
2.  Rated Primary Current :  Amps *
3.  Secondary Core details
     a. Rated Secondary Current :  5 Amp *
     b. Rated Output :  Rated Output
     c. Class of accuracy :  0.2S *
     d. Accuracy limit factor :  NA *
4.  Turns Ratio :  Nominally same as transformation ratio
5.  Short time thermal current & its duration :  To suit system fault level
6.  Rated dynamic current (peak value) :  2.5 * Short Time Current Rating
7.     a. Rated continuous thermal current :  120% of rated primary current *
        b. Temperature rise over ambient :  Within limits prescribed by IS. *
8.  Impulse withstand test voltage kV Peak :  75 *
9.  One-minute power frequency dry/wet withstand test voltage on primary kV rms :  28 *
10.  One-minute power frequency withstand test voltage on secondary kV rms :  3 *
11.  Reference specification to which the equipment conform :  IS 2705 / 1992

Note: Only items marked * are guaranteed. All others are indicative and subject to change.