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Min. Order / Reference FOB Price | |
---|---|
1 Piece | US $2000000.00/ Piece |
Local Area: | Ningbo, Zhejiang, China |
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R&D Capacity: | OEM, ODM, Other |
Payment Terms: | LC, T/T, PayPal |
Application: | Power |
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Phase: | Three |
Core: | Core-type Transformer |
K. 400/200kV POWER UNIT DATA Required Offered
TRANSFORMERS (AIS-AIS)
1
POWER TRANSFORMER
1.1
Manufacturer & Place of
manufacturing
HEMG
1.2
Type designation
OSFSZ-200000/400
1.3
Type
Three phase Autotransformer, oil-immersed, core type with tertiary winding
Yes
1.4
Standards
IEC 60076, 60137, 60214
1.5
Altitude
m
216
1.6
Ambient temperature
- Maximum
ºC
40
- Annual average
ºC
30
1.7
Mounting
Outdoor
1.8
Rated voltage ratio
kV
400
220
11
1.9
Rated frequency
Hz
50
1.1
Vector group (3 phase group connection)
YNa0d11
1.11
Cooling- 2-stage
ONAN/ ONAF1/ ONAF2
1.12
Function of tertiary winding (TV)
Aux. supply
1.13
Method of earthing
- HV winding
Solid
- LV winding
Solid
- TV winding
-
1.14
Type of windings (graded/ non-graded)
- HV winding (Series)
Graded
- LV winding (Common)
Graded
- TV winding
Non-graded
1.15
Rated voltage of windings (Ur)
- HV winding
kV
400
- LV winding
kV
220
- TV winding
kV
11
Note*: approximate; to manufacturer's preference
1.16
Highest voltage for equipment (Um)
- HV winding
kV
420
- LV winding
kV
245
- TV winding
kV
12
1.17
Rated lightning impulse withstand voltage at:
- HV terminal
kV
1425
- LV terminal
kV
1050
- Neutral terminal
kV
480
- TV winding
75
1.18
Rated switching impulse voltage
- HV terminal
kV
1050
- LV terminal
kV
850
1.19
Rated power frequency withstand voltage at
- HV terminal (design value)
kV
630
- HV test value (ACLD U1)
kV
436
- HV test value (ACLD U2 PD measurement)
kV
388
- LV terminal (design value)
kV
460
- Neutral terminal
kV
70
- TV terminal
kV
28
1.2
Rated power at site conditions (ONAF2 or OFAF), HV & LV
MVA
200
1.21
Rated power at site conditions (ONAN)
MVA
120
1.22
Rated power of tertiary at site conditions (Full cooling)
MVA
70
1.23
Maximum temperature rise at rated power at:
- Windings
K
55
Marikani
- Hot spot of windings
K
68
Marikani
- Top oil
K
50
Marikani
- Oil at inlet of cooler
K
Approx 22
- Oil at outlet of cooler
K
Approx 50
- Core
K
Approx 75
1.24
Temperature of winding due to short circuit duration of 2s at rated load
- HV side short circuit rating of 31.5kA
ºC
250
- LV side short circuit rating of 31.5kA
ºC
250
1.25
No-load losses at rated voltage and rated frequency
kW
45
1.26
Load losses at 75ºC, and rated frequency:
- ONAF2 or OFAF rated power and principal tapping
288
- ONAF2 or OFAF rated power and maximum voltage ratio
- ONAF2 or OFAF rated power and minimum voltage ratio
278
- At onAN rated power and principal tapping
350
105
1.27
Total auxiliary losses at fully load
kW
Approx 10
1.28
Maximum current density at rated power:
- HV winding
A/mm2
Approx 2.0
- LV winding
A/mm2
Approx 2.0
- TV winding
A/mm2
Approx 3.6
- Tapping
A/mm2
Approx 3.6
1.29
Symmetrical short circuit through current (duration 2s) at system fault rating
- HV terminals (31.5kA)
kA
31.5
- LV terminals (31.5kA)
31.5
1.3
Magnetising current (HV winding)
- At 90% rated voltage
A
Approx0.7
- At 100% rated voltage
A
Approx0.9
- Ar 110% rated voltage
A
Approx6.8
1.31
Maximum flux density in iron at rated voltage, power frequency and principal tapping at:
- Wound limbs
T
Approx1.7
- Unwound limbs
T
Approx1.7
- Yokes
T
Approx1.7
- Shields
T
Approx1.7
1.32
Maximum flux density in iron at power frequency, principal tapping and 105% rated voltage at:
- Wound limbs
T
Approx 1.78
- Unwound limbs
T
Approx 1.78
- Yokes
T
Approx 1.78
- Shields
T
Approx 1.78
1.33
Type pf tap changing
On-load
On-load
1.34
Manufacturer of on-load tap changer
MR
1.35
Type designation of on-load tap changer
M500-72.5/C-10193W
1.36
Tapped winding
HV
HV
1.37
Type of flux voltage variation
V.F.V.V
V.F.V.V
1.38
Tapping range
-1
-1
1.39
Tapping step
1.25%
1.25%
1.4
Number of steps (positions)
16 (17)
16 (17)
1.41
Arrangement of tappings (Linear, Coarse/ Fine, Reversing)
Reversing
1.42
Automatic voltage control
Yes
Yes
1.43
HV - LV Impedance voltage range at 75°C, rated frequency and full rating:
- At principal tapping
%
>14%
>14%
- At maximum voltage ratio
%
>14%
>14%
- At minimum voltage ratio
%
>14%
>14%
1.44
Impedance voltage HV-TV (principle tapping) at 70MVA
%
Approx 22.5
1.45
Resistance of winding at 75ºC and principal tapping:
- HV side
Ω/phase
Approx 0.53
- LV side
Ω/phase
Approx 0.58
- TV
Ω/phase
Approx 0.029
1.46
Terminal connection
- HV terminal
Outdoor bushing
Outdoor bushing
- LV terminal
Outdoor bushing
Outdoor bushing
- Neutral terminal
Outdoor bushing
Outdoor bushing
- TV terminal
Outdoor bushing
Outdoor bushing
1.47
Bushing Creepage Distance (IEC class IV=31mm/kV)
- HV terminal (420kV)
mm
13020
13020
- LV terminal (245kV)
mm
7595
7595
- Neutral terminal (36kV)
mm
≥900
≥900
- TV terminal (12kV)
mm
372
372
1.48
Cable box insulation
- HV terminal
N/A
N/A
- LV terminal
"
N/A
- HV Neutral terminal
"
N/A
- LV Neutral terminal
"
N/A
- Tertiary
"
N/A
1.49
Isolating links for test purposes
- HV terminal
N/A
N/A
- LV terminal
"
N/A
- Tertiary terminal
"
N/A
1.5
Current transformers
HV- Bushing turrets
Refer to Tender Drawings
- Number of cores
3
- Rated extended primary current
500, 1000/500, 1000/500
- Ratio (TR= turns ratio)
•I core
A
500/1
•II core
A
1000/500/1
•III core
A
1000/500/1
- Class
•I core
5P20
•II core
5P20
•III core
5P20
- Knee point voltage (Ek)
•I core
V
1665
•II core
V
3330/ 1665
• III core
V
3330/ 1665
- Exciting current (IE) at EK
•I core
mA
Will provide measured value
•II core
mA
Will provide measured value
•III core
mA
Will provide measured value
- Rated output (Burden to be 25-100% rated burden)
•I core
VA
30
•II core
VA
30
•III core
VA
30
LV line (only AIS connections)
- Number of cores
3
- Rated extended primary current
1500, 750,750
- Ratio (TR= turns ratio)
"
1500/750/1; 750/1; 750/1
- Class
"
5P20
- Knee point voltage (Ek)
"
4995, 2498, 2498
- Exciting current (IE) at Ek
"
Will provide measured value
- Rated output (Burden to be 25-100% rated burden)
"
30
Neutral (HV REF)
- Number of cores
1
- Rated extended primary current
500
- Ratio (TR= turns ratio)
* I core
A
500/1
- Class
* I core
5P20
- Knee point voltage (Ek)
* I core
V
1665
- Exciting current (IE) at Ek
* I core
mA
Will provide measured value
- Rated output (Burden to be 25-100% rated burden)
* I core
VA
15
Neutral - ends
- Number of cores
1
- Rated extended primary current
500
- Ratio (TR= turns ratio)
•I core
A
500/1
- Class
•I core
5P20
- Knee point voltage (Ek)
•I core
V
1665
- Exciting current (IE) at Ek
•I core
mA
Will provide measured value
- Rated output (Burden to be 25-100% rated burden)
•I core
VA
15
All class PX CTs shall have a rated secondary current, ISN
A
1
Tertiary
- Number of cores
N/A
- Rated extended primary current
A
N/A
- Ratio (TR= turns ratio)
* I core
N/A
* II core
N/A
- Class
* I core
N/A
* II core
N/A
- Knee point voltage (Ek)
* I core
V
N/A
* II core
V
N/A
- Exciting current (IE) at Ek
* I core
mA
N/A
* II core
mA
N/A
- Rated output (Burden to be 25-100% rated burden)
* I core
VA
N/A
* II core
VA
N/A
1.51
Number of coolers per transformer
Approx 10
1.52
Number of stand-by coolers
N/A
1.53
Number of stand-by fans
1
1.54
Rating of each cooler
kW
0.75
1.55
Oil
- Manufacturer
Nynas Nitro
- Type designation
GBN1
- Standards
IEC 60296
IEC 60296
- Minimum flash point
ºC
140
- Viscosity
* at 20ºC
mm2/s
IEC 60296
* at 50ºC
mm2/s
IEC 60296
* at 80ºC
mm2/s
IEC 60296
- Maximum dielectric strength for 1 min.
kV
70
- Dielectric factor
0.005
- Acidity (neutralization value)
mgKOH/g
0.01
1.56
Oil preservation system
Air-bag
Air-bag
1.57
Types and arrangement of winding:
- HV winding
Disc
- LV winding
Disc
- TV winding
Disc
- Regulating
Disc
- Windings arrangement (i.e. Core/ TV/ LV/ HV/ Taps)
Core/ TV/Taps/ LV/ HV/
1.58
Conductor material (e.g., copper, work hardened copper, etc.)
- HV windings
Work hardened copper
- LV windings
Work hardened copper
- TV windings
Work hardened copper
- Regulating windings
Work hardened copper
- Connecting leads from winding to tap changer
Work hardened copper
1.59
Conductor insulation:
- HV windings
Paper
- LV windings
Paper
- TV windings
Paper
- Regulating windings
Paper
- Connecting leads from winding to tap changer
Paper
1.6
Calculated thermal time constant
- onAN cooling
min
Oil:210 windings:10
- Full cooling
min
Oil:90 windings:7
1.61
Oil circulation (i.e., natural/ partially directed/ directed)
To the windings:
- HV windings (Series)
Natural
- LV windings (Common)
Natural
- Regulating windings
Natural
- TV windings
Natural
Through the windings:
- HV windings (Series)
Derected
- LV windings (Common)
Derected
- Regulating windings
Natural
- TV windings
Derected
1.62
Core construction:
- Taped/ banded/ bolted limbs
Banded limbs
- Taped/ banded bolted yokes
Banded yokes
- Taping / banding material
Epoxy-bound bandage
- Number of limbs
3
- Number of limbs wound
3
- Type of joint in magnetic core (90% butt, overlap, mitre, etc.)
Overlap
- Type of core steel
23RK85
- Specific loss of core steel at 1.5 tesla
W/kg
Approx 0.7
1.63
Thickness of transformer tank
- Sides
mm
10
- Bottom
mm
10
- Top
mm
25
1.64
Material of transformer tank
Q235
1.65
Thickness of radiator plates
mm
1
1.66
Total volume of conservator
Litre
Approx 4000
1.67
Minimum volume of conservator between highest and lowest levels as percentage of total cold oil at 15ºC volume of transformer
7.50%
7.50%
1.68
Volumetric expansion of oil from 0ºC to 90ºC
m3
Approx 5.7
1.69
Pressure increase inside tank due to expansion of oil
N/A
1.7
Masses of transformer
- Core and coils
kg
Approx 93000
- Total mass excluded oil
kg
Approx 140000
- Oil mass * in tank
kg
Approx 61000
* in radiators
kg
Approx 2500
* total
kg
Approx 81000
- Total mass
kg
Approx 221000
1.71
Mass of transformer as arranged for transport (heaviest part)
kg
Approx 120000
1.72
Dimensions of transformer arranged for transport
- Height
m
- Width
m
- Length
m
1.73
Filling medium of transformer tank for shipment
Dry air
1.74
Maximum sound pressure level (NEMA TR1- 5dB(A))
dB(A)
82
82
1.75
Conservator vessel, radiators, fan grilles, control boxes or cubicles and pipework anticorrosion protection
Hot dip galvanized and painted
Hot dip galvanized and painted
1.76
Tank anticorrosion protection
Painted
1.77
Supply voltage for transformer auxiliaries
V
415/ 240 AC
415/ 240 AC
1.78
Control/ Protection voltage
V
110 DC
110 DC
1.79
Manufacturer quality assurance
Yes
Yes
- According to ISO 9000, 9001, 9002, 9003 and 9004
validity
validity
1.8
Type test certificate to be issued by:
- Independent laboratory or independently witnessed type test certificate
Yes
Yes
1.81
Special Tests to be performed:
As Type test= T
As Routine test= R
- Dielectric test- Chopped wave lightning impulse
Yes (R)
Yes (R)
- Dielectric test- Short duration AC (ACSD)
No
No
- Measurement of zero-sequence impedance
N/A
N/A
- Determination of sound levels
Yes (T)
Yes (T)
- Measurement of harmonics of no-load current
Yes (R)
Yes (R)
- Measurement of power of fan motors & oil pumps
Yes (T)
Yes (T)
- Determination of capacitance, windings to earth and between windings
Yes (R)
Yes (R)
- Measurement of insulation resistance to earth and loss angle of insulation system capacitances
Yes (R)
Yes (R)
- Vibration test
No
No