TECHNICAL PERTICULAR FOR 1.6 MVA 6.6/0.433 KV SERVICE TRANSFORMER 1.00.00 GENERAL 1.01.00 Service SERVICE 1.02.00 Make ASHOK/VOLTAMP/DANKE/CGL 1.03.00 Type CORE 1.04.00 Location OUTDOOR 1.05.00 Specification and Standards 1.06.00 Type of cooling ONAN 1.07.00 Fitting and accessories included as per specification 1.08.00 Design and ambient temp. 50 DEG CENTEGRADE (Deg C.) 1.09.00 System particulars 2.00.00 RATING 2.01.00 Rated KVA at design 1.6 MVA ambient on ONAN cooling 2.02.00 Rated voltage of HV(KV) 6.6 2.03.00 Rated voltage of LV(KV) 0.433 2.04.00 Rated frequency (Hz) 50 2.05.00 Maximum temp. rise above design ambient of winding by resistance method on ONAN cooling ((deg C.) 50 2.06.00 Maximum temp. rise in oil by 40 thermometer above design ambient (deg C) 2.07.00 Overload capacity for As per IS 2026 specified time 2.08.00 Short circuit rating (Sec) for As per IS 2026 time 3.00.00 WINDING 3.01.00 Connections 3.01.01 HV winding DELTA
3.01.02 LV winding STAR 3.01.03 Vector group Dyn11 3.02.00 Tapping on HV winding 3.02.01 Number 6 3.02.02 Range +/-7 ½ % 3.02.03 Value of each step 2 ½ % 3.03.00 Current density 3.03.01 HV winding (A/mm 2 ) 3 A/mm 2 3.03.02 LV winding (A/mm 2 ) 3 A/mm 2 3.04.00 Conductor area 3.04.01 HV winding (mm 2 ) To be furnished 3.04.02 LV winding (mm 2 ) To be furnished 4.00.00 Losses 4.01.00 No Load losses at rated frequency 4.01.01 100% rated voltage To be furnished 4.01.02 110% rated voltage To be furnished 4.02.00 Copper losses at current,frequency,75degre e centigrade 4.02.01 OFAF NA 4.02.02 ONAF NA 4.03.00 ONAN To be furnished 5.00.00 Efficiency 5.01.00 Efficiency at 75 degree centigrade and Unity P.F / 0.8P.F 5.01.01 100% 98.91% / 98.64% * 5.01.02 75% 99.09% / 98.87% * 5.01.03 50% 99.22% / 98.87% * 5.02.00 MAXIMUM EFFICIENCY % 99.02% * 5.03.00 Load at which maximum efficiency occurs 0.64 * Note:- Efficiency values shall be nearer or higher as mentioned above.
6.00.00 Constructional Detail 6.01.00 Type of construction CORE 6.02.00 Insulation between INORGANIC laminations 6.03.00 Type of joint between core Mitred type limb and yoke 6.04.00 Bolt insulation test voltage 2 KV one minute 6.05.00 Type of winding 6.05.01 Hv winding LAYER 6.05.02 Lv winding LAYER 6.06.00 Winding insulation 6.06.01 Hv winding (kv UNIFORM uniform/graded category 6.06.02 Lv winding (kv uniform) UNIFORM 6.07.00 Insulation material 6.07.01 Hv winding turn insulation PAPER 6.07.02 Lv winding turn insulation PAPER 6.07.03 Between HV and LV winding PAPER BOARD 6.07.04 Between LV winding and PAPER BOARD Core 6.08.00 Type of joint in winding BRAZED 6.09.00 Minimum clearance 6.09.01 Between phases 1. in oil (mm) 2. out of oil (mm) 6.09.02 HV tolv 1.in oil (mm) 2.out of oil (mm) 6.09.03 HV to Earth 1.in oil (mm) 2.out of oil (mm) 6.09.04 LV to Earth 1.in oil (mm) 4 10 MIN 178 MIN 9 NOT APPLICABLE 25 115
2.out of oil (mm) 25 6.10.00 Terminal Arrange ment 6.10.01 High Voltage CABLE BOX 6.10.02 Low voltage CABLE BOX 7.00.00 Transformer constants 7.01.00 Positive sequence To be furnished percentage impedance at principle tap, rated frequency and seventy-five degree centigrade temperature on rated MVA base 7.02.00 Maximum flux density in core at rated frequency 7.02.01 Hundred percent rated volts To be furnished 7.02.02 Hundred ten percent rated To be furnished volts 7.03.00 Noise level maximum 65 7.04.00 Test voltage 7.04.01 Impulse (1.2/50 microsecond wave)withstand voltage 1.HV winding (KV peak) 2.LVwinding (KV peak) 7.04.02 One minute power frequency withstand 1.HV winding (KV peak) 2.LVwinding (KV peak) 7.05.00 No load current at rated frequency and 7.05.01 100% rated voltage TO BE SUBMITTED (= or < 2%) Amp 7.05.02 110% rated voltage TO BE SUBMITTED (= or < 7%) Amp 7.06.00 No load power factor at rated voltage and frequency 60-22 3 TO BE SUBMITTED
7.07.00 Percentage impendence at rated current, rated frequency and seventy five degree centigrade on rated MVA base 7.07.01 Positive sequence at 8 maximum tape +/-10 % 7.07.02 Positive sequence at 7.6 minimum tape +/-10 % 7.08.00 Percentage resistance and reactance at rated current and frequency on rated MVA base 7.08.01 HV to LV reactance % 7.9 7.08.02 Resistance HV winding % 0.5 7.08.03 Resistance LV winding % 0.4 7.09.00 Percentage regulation at full load, seventy five degree centigrade and 7.09.01 Unit power factor % 1.2 7.09.02 0.8 lag power factor % 5.6 8.00.00 Bushings 8.01.00 Type Indoor Indoor Indoor 8.02.00 Voltage class KV HV LV LVN 7.2 1.0 1.0 8.03.00 Rated current 250 2500 2500 8.04.00 Momentary power frequency -- -- -- dry withstand voltage 8.05.00 Visible discharge power 5.5 - - frequency voltage 8.06.00 One minute power frequency withstand voltage 8.06.01 Dry (kv) 27 3 3
8.06.02 Wet (kv) 27 3 3 8.07.00 Under oil flash over or NOT APPLICABLE puncture withstand power frequency voltage 8.08.00 Full wave (1.2/50 microsecond) withstand impulse voltage 8.08.01 Positive(kv peak) 60 8.08.02 Negative (kv peak) 60 8.09.00 Under oil flashover or puncture(1.2/50microseco nd) withstand impulse voltage 8.09.01 Positive(kv peak) NOT APPLICABLE 8.09.02 Negative (kv peak) NOT APPLICABLE 8.10.00 Creep age distance in air 8.10.01 Total (mm) 115 8.10.02 Protected(mm) NOT APPLICABLE 8.11.00 Recommended tap setting NOT APPLICABLE 8.12.00 Weight of assembled TO BE FURNISHED bushing (kg) 9.00.00 Details of tank and materials 9.01.00 Thickness of side plates 5 (mm) 9.02.00 Thickness of bottom plates 6 (mm) 9.03.00 Thickness of cover plates 6 (mm) 9.04.00 Thickness of radiator (pipes TO BE SUBMITTED or sheets) 9.05.00 Material of tank plates MILD STEEL 9.06.00 Material of cooling tubes - 9.07.00 Material of radiator PRESSED STEEL
9.08.00 Material and thickness of CRGO-0.028 core sheet 9.09.00 Are the following designed for filling under full vacuum? 9.09.01 Tank YES 9.09.02 Radiator YES 9.09.03 Conservator YES 9.09.04 Bushings YES 10.00.00 On load tape changer NA 10.01.00 Make 10.02.00 Type 10.03.00 Descriptive Bulletin no (attached) 10.04.00 Connected to 10.05.00 Rating 10.05.01 Rated voltage 10.05.02 Rated current 10.05.03 Tap voltage 10.05.04 Number of steps 10.06.00 Control function provided 10.06.01 Local manual mechanical operation 10.06.02 Non automatic local electrical independent control 10.06.03 Non automatic remote electrical independent control 10.06.04 Non automatic remote electrical simultaneous parallel control 10.06.05 Automatic voltage control 10.07.00 Auxiliary supply(v)
10.08.00 Protective devices 10.09.00 Approximate overall weight (kg) 10.10.00 Approximate overall dimensions 10.11.00 Approximate overall qty of oil (liters) 11.00.00 Off circuit tap switch 11.01.00 Make TO BE FURNISHED 11.02.00 Type MANUALLY,EXTERNALLY,GANG OPERATED 11.03.00 Descriptive Bulletin no (attached) 11.04.00 Connected to CENTRE OF WINDING 11.05.00 Rating 11.05.01 Rated voltage 7200 V 11.05.02 Rated current 100 A 11.05.03 Tap voltage 165 11.05.04 Number of steps 6 12.00.00 Cooling equipment for NOT APPLICABLE OFAF/ONAF/ONAN Type transformer 12.01.00 Number of group of coolers 12.02.00 Number of group of spare coolers 12.03.00 Capacity of each group of coolers (%) 12.04.00 Power consumption per cooler (kw) 12.05.00 Fan and pump details 12.05.01 Number 1.Total : 2. Running: 3. Standby:
12.05.02 Type 12.05.03 Rating (kw) 12.05.04 Speed(rpm) 12.05.05 Motor details 12.06.00 Input (kw) 12.07.00 supply 12.08.00 Type of cooling equipment control 12.09.00 Temperature range over which control is adjustable 12.10.00 Total surface area of each cooler 13.00.00 Weight and dimensions To be furnished 13.01.00 Net weight of core(kg) To be furnished 13.02.00 Net weight of copper To be furnished 13.02.01 HV winding To be furnished 13.02.02 LV winding To be furnished 13.03.00 Net untanking weight (cover To be furnished with core and winding) (Tm) 13.04.00 Net weight of insulating oil To be furnished ( ) 13.05.00 Volume of insulating To be furnished oil(liters) 13.06.00 Total weight of To be furnished transformer 13.06.01 With out oil (Tm) To be furnished 13.06.02 With oil (Tm) To be furnished 13.07.00 Total weight of cooling To be furnished equipment i.e. Radiators 13.08.00 Total weight of transformer To be furnished and ancillary equipment (Tm) 13.09.00 Shipping weight of largest To be furnished
package (Tm) 13.10.00 Crane lift(excluding slings To be furnished for untanking cover with core and windings) 13.11.00 Crane lift(excluding slings To be furnished for removal of HV bushings 13.12.00 Overall dimensions of the transformer 13.12.01 Under base to the top most point (mm) 13.12.02 Under base to bushing mounting flange (mm) 13.12.03 Overall width (mm) 13.12.04 Overall length (mm) 13.13.00 Overall shipping dimensions To be furnished of the largest package 13.14.00 Gross shipping weight to be To be furnished handled 13.15.00 Gross shipping volume to be To be furnished handled 13.16.00 Parts detached for transport To be furnished * Note : - Drawings must be approved prior to order commencement. AS PER DRAWING APPROVED * AS PER DRAWING APPROVED * AS PER DRAWING APPROVED *