33kv/66kv/132kv 50Hz/60Hz Power Transformer up to 120mva

• Customization: Available
• Application: Power
• Phase: Three
• Model NO.: SZ10
• Cooling Method: Oil-immersed Type Transformer
• Winding Type: Two-winding Transformer
• Certification: ISO9001-2000, ISO9001
• Usage: Single-phase Transformer, Rectifier Transformer, Combined Transformer, Power Transformer, Distribution Transformer
• Frequency Characteristics: High Frequency
• Shape of Core: U
• Transport Package: Carton with Wooden
• Specification: 33KV/72.5KV/123KV/132KV/145KV
• Trademark: HEMG
• Origin: China
• Production Capacity: 10000

Product Description

 
POWER TRANSFORMER TECHNICAL SCHEDULE
 
One three phase transformer, oil immersed, outdoor installation, with on-load tap-changer, has the following characteristics:
 
1.     RATED CHARACTERISTICS
 
1.1 - Rated power input (MVA):
ONAN cooling:....................................... 80
ONAF cooling:...................................... 120
1.2 - Rated voltage (kV):
HV: ........................................................ 132
LV: .......................................................... 33
1.3 - On load tapping range at HV winding: +4*1.25%, -12*1.25%
1.4 - Connection symbol:........................ .Dyn1
1.5 - Rated frequency (Hz):........................... 50
1.6 - Standards:........................................... IEC
1.7 - Altitude of the installation: lower than 1000 M
2.     GUARANTEES
 
2.1 - Losses at rated frequency and principal tapping (kW):
2.1.1 - No load loss at rated voltage..............................70
2.1.2 - Load loss, with voltage ratio 132/33kV (HV/LV), (reference temperature 75°C): at 120MVA (input) (ONAF cooling) ...........................410
2.1.3 - Total loss at 75°C (with voltage ratio HV/LV) ..................…480
2.2 - Impedance voltage (%), base 120MVA (ONAF):
Ratio 132/33 kV: .…...…...…...…...…..…...….................10%
2.3 - Insulation level:
HV                 LV
Power frequency test (kV rms)                230                  70
Full wave impulse test (kV peak)            550                 170
2.4 - Temperature rise at 120 MVA (input), ratio 132 / 33kV, under site conditions:
Top oil (by thermometer):................. .60°C
Windings (by resistance): ............... ..65°C
3.     TANK AND COOLING SYSTEM
3.1 - Tank:
- Tank with detachable radiators (radiators can be isolated from transformer tank by disc valves).
- The tank is vacuum proof and withstands an internal overpressure of not less than 0.7 kg/cm² (at cover level).
3.2 - Cooling system:
-Oil circulation attached radiators.
-Air circulation attached motor fans.
4.     ON LOAD TAP CHANGER
Provided an off circuit tap changer, for automatic or manual operation, for regulation on the HV winding.
Manufacturer:....................... MR, Germany
Type:................ R III 1200-145/C-10193W
5 - BUSHING:
 

	HV	LV
Manufacturer	CHINA	CHINA
Type	BRDLW-145/800	BJL-35/3000

 

 
6.-ACCESSORIES
 
Oil conservator equipped with a rubber cell, two silicagel breather and two dial type oil level gauges.
Buchholz relay with twin-float (alarm and tripping) for transformer tank.
Dial type thermometer for top oil temperature indication with 2 sets of adjustable contacts for alarm and tripping.
One thermal image system, with dial type thermometer for local winding hot spot temperature indication. The system is equipped with 2 sets of adjustable contacts for alarm ant tripping purposes. Current transformer is included and installed on LV bushing.
Weather proof terminal cabinet with heater.
Draining, filtering and sampling valves.
Lifting, untanking and pulling lugs.
Pressure relief device with tripping contact.
Grounding pads.
Jacking pads.
Skid base bottom allowing movement in any direction.
 
7. TESTS
 
7.1 - Routine tests - according to IEC 60076:
7.1.1 - Measurement of winding resistance.
7.1.2 - M35-500 kV Seriel• Oil Immersed Power Transformer has .pt,mlzed design using advance techn.the resistance t. sh.rt circuit capacity. Advance design are ore used f.,elect,.magnetic calcion and de.,gn of transformer. while 3·.2·0 CAD softwares for design ensure suffic,ent sa'ety margin during short circuit peri.d This is based on in depth th!.retical and experimental studies .n magnetic, thermal, mechar,,cat strength and sh." circuit strength. To ensure reliability .t the transformer the insulation are decided based .n ca easurement of voltage ratio and check of voltage vector relationship.
7.1.3 - Measurement of impedance voltage.
7.1.4 - Measurement of load loss.
7.1.5 - Measurement of no load loss and no load current.
7.1.6 - Measurement of insulation resistance.
7.1.7- Routine dielectric tests (according to IEC 60076):
Induced overvoltage withstand test.
Separate source power frequency voltage withstand test.
7.1.8 - Tests on bushings - and OLTC:
-The routine tests on the bushings and on the OLTC will be done by the respective manufacturers.
 
8. MASS AND OVERALL DIMENSIONS (APPROX.)
8.1 - Mass (kg):
Total oil:.......................................... 30000
Complete transformer with oil:....... 130000
8.2 - Overall dimensions of the complete transformer (mm):
Length:................................................ 6710
Width:.................................................. 4590
Height:................................................. 6080
8.3 - Transportation mass and dimensions of the heaviest and largest transformer part (approx.):
Mass with oil (kg):.......................... 110000
Dimensions (mm):
       - Length:....................................... 5370
        Width:........................................ 1830
       Height:....................................... 3860