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78 Terminal Arrangement HV

LV

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4

3

4

5

1

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3

Rated current of H.V.( Amps ) 27.99 (Line current)

Rated current of L.V.( Amps ) 2133.41

c.Voltage of each step 412.5V

Vector Symbol Dyn11

Tapingsa. No.of positions 17 (16 Steps)

b. Range + 5 % to - 15 % in steps of 1.25 %

a. H.V. Winding Delta

b. L.V. Winding Star

c. Neutral brought out for earthing Yes

Over load capacity As per IS : 6600

1.04. WINDING CONNECTION DETAILS

Connections

Max. Temperature rise in oil by 50

thermometer above 50 C ambient

Temperature (Deg.C)

Max.Temperature rise above 50 C ambient 55

temperature of winding by resistancemethod. (Deg.C)

1.03. RATING

Rated Voltage of H.V.( Volts ) 33000

Rated voltage of L.V.(Volts) 433

Frequency Variation + / - 3 %

Combined Voltage and Frequency variation + / - 10 %Bare Bushings

Bus duct

No. Of Phases 3

Frequency ( Hz ) 50

Voltage variation + / - 10 %

1.02. SYSTEM PARTICULARS

Nominal Voltage (V) 33000

Highest System Voltage (V) 36000

Specifications and Standard as per IS IS 2026

Type of Cooling ONAN

Wound Copper Double Wound

Make SERVOMAX INDIA LTD.

Type Core Type Oil ImmersedLocation Outdoor

TECHNICAL SPECIFICATION OF TRANSFORMER

The transformer will be designed and manufactured as per IS:2026-1977 and will be supplied with first filling

of oil to IS:335 of 1993.

1.01. GENERAL SPECIFICATIONS

Rated KVA 1600

Service & Duty Continuous

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1 UPF 0.8 P.F.

98.87 98.59

99.07 98.84

99.22 99.03

99.18 98.98

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3

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L.V Winding (KV) 3

b.One minute power Frequency

withstand voltage

H.V Winding (KV ) 70

withstand voltage

H.V Winding (KV peak) 170

L.V Winding (KV Peak) N.A

In oil 7

Out of oil 201.12. TEST VOLTAGES

a.Impulse (1.2 / 50 micro second wave)

In oil 60

Out of oil 355

L.V. to Earth (mm)

d.Between LV Winding and core Solid Cylinder

1.10. TYPE OF JOINTS IN WINDING Brazed

1.11. MINIMUM CLEARANCES

H.V to Earth (mm)

a.HV Winding turn Insulation DPC

b.LV Winding turn Insulation DPC

c.Between HV and LV Winding Oil Duct + Solid Cylinder + Oil Duct

1.08. WINDING INSULATION LEVEL

a.HV Winding (KV uniform) 36

b.LV Winding (KV uniform) 1.1

1.09. INSULATION OF CONDUCTORS

Type of Winding

a.HV Winding Continuous disc

b.LV Winding Helical

Type of Construction Core Type

Insulation between laminations Carlit

Type of joint between core limb and yoke Mitered

Maximum efficiency (Percentage) 99.25

Load at which Max.efficiency occurs KVA 606.56*Subject to IS tolerance

1.07. CONSTRUCTIONAL DETAILS

b. 75% Full Load

c. 50% Full Load

d. 25% Full Load

Regulation at full load at 75 Deg.C 0.8 u.p.f 4.59%

1.06. EFFICIENCY

Efficiency at 75 Deg.C.

a. 100% Full Load

normal Tap 6.25

Regulation at full load at 75 Deg.C u.p.f 1.19%

Copper losses at rated current and rated

frequency at 75 deg.C(Watts)At Normal Tap. 16000Percentage Impedance at 75 Deg.C at

1.05. LOSSES AND OTHERS

No load losses at rated frequency and

voltage (Watts) 2300

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5 Length Breadth Height

3100 2550 2550

S.N

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Yours faithfully,

for SERVOMAX INDIA LTD.

[MARKETING INCHARGE]

1.18. TESTS

ROUTINE TESTS

As per IS : 2026 all the Routine tests are carried out by our work , in the presence ofyour representative.

We now look forward to receive your valued order

Thanking you,

RTCC PANEL One

1.17. PAINTING

Surface preparation By Grit Blasting

Paint Enamel Light Grey, Shade No. 631, of IS : 5

OTI One

WTI One

MARSHALLING BOX One

Uni- directional Flat Rollers Four

Separate Neutral Bushing OneGOR One

Filter valve with blanking plate One

Explosion vent with Diaphragm One

Radiators (Detachable) Adequate

Air release device One

Thermometer Pocket One

Drain valve with blanking plate One

Oil filling hole with cap One

Oil Level Indicator One

Dehydrating Silicagel Breather One

Lifting Lugs Four

OLTC OneConservator with Drain plug One

1.16. STANDARD FITTINGS AND ACCESSORIES

DESCRIPTION QTY

Rating and terminal marking plate One

Earthing Terminals Two

Total Weight of Transformer (Kg.) 6415

Overall dimensions of the transformer

(approx.) in mm

1.15. Parts to be detached for transport Rollers, Breather & Radiators

(Core and windings with clamps )Volume of insulating oil (Ltr.) 2355

Tank and fittings (Kg.) 1895

Thickness of cover plates (mm) 6

Thickness of radiator (pipes or sheets) 1.25 mm

1.14. WEIGHTS AND DIMENSIONS (APPROX.)

Net untanking weight (Kg.) 2515

1.13. DETAILS OF TANK AND MATERIALS M.S

Thickness of side plates(mm) 5

Thickness of bottom plates (mm) 6