11kV-34.5kV Earthing Grounding Transformer Zigzag Transformer
| Price: |
US $ 8000-10000/Piece |
| Min Order: |
1/Piece |
| Pay Type: |
L/C,T/T |
TECHNICAL DATA SCHEDULE
34.5 kV EARTHING CUM STATION SERVICE TRANSFORMER
|
|---|
| ITEM | DESCRIPTION | UNITS | REQUIRED | GUARANTEED |
|---|
| 1.0 | Manufacturer | - | - |
|
| 1.1 | Type | - | Three-phase with 1 winding | DKS-300/34.5 |
| 1.2 | Class |
| - |
|
| 2.0 | Rated data and characteristics |
|
|
|
| 2.1 | Rated voltage:
- HV winding
- LV winding
- Manual off-load taps |
kV
V
% |
34.5 kV
415 V
±2 x 2.5% on LV winding |
34.5 kV
415 V
±2 x 2.5% on HV winding |
| 2.2 | Rated frequency | Hz | 50 | 50 |
| 2.3 | Connection of the 3 phase windings (group of vectors IEC) |
- |
Znyn1 | Znyn1 |
| 2.4 | Rated capacity: |
|
|
|
| 2.4.1 | Rated continuous neutral current of HV winding | A | 20 | 20 |
| 2.4.2 | Rated power of secondary winding | kVA | 300 | 300 |
| 2.5 | Cooling | - | ONAN | ONAN |
| 2.6 | Excitation current at rated voltage | A | - | 0.4 |
| 2.7 | Impedance | - | - |
|
| 2.7.1 | Zero-sequence impedance of HV winding | ohms | 20 | 20 |
| 2.7.2 | Direct sequence impedance of LV winding at rated power | % | 6 | 6 |
| 2.8 | Tolerance to be applied to the impedance, in terms of % the guaranteed value |
% |
7.5 | 7.5 |
| 2.9 | Short-circuit withstand | - | - |
|
| 2.9.1 | HV winding capacity to withstand external short-circuits:
- short-circuit duration
- short-circuit current withstand the indicated period |
Sec.
A RMS |
10
3600 |
10
3600 |
| 2.9.2 | Short-circuit duration for LV winding | sec | 2 | 2 |
| 2.10 | Guaranteed losses |
|
|
|
| 2.10.1 | No-load losses at rated voltage and frequency | kW | - | 2.6 |
| 2.10.2 | No-load losses capitalized value | US $/kW | 3000 | 3000 |
| 2.10.3 | Tolerance to be applied to no-load losses
(in % of the guaranteed value) | % | +10 | +10 |
| 2.10.4 | On-load losses at rated voltage and frequency and copper temperature rise at 75°:
- HV winding at maximum neutral current
- LV winding at rated power |
kW
kW |
-
- |
40
0.9 |
| 2.10.5 | On-load losses capitalized value | US $/kW | 1080 | 1080 |
| 2.10.6 | Tolerance to be applied to no-load losses
(in % of the guaranteed value) | % | +10 | +10 |
| 2.11 | Highest voltage for equipment:
- HV winding |
kV |
36 |
36 |
2.12
2.12.1 | Rated insulation level:
Short time power frequency withstand:
- HV winding line terminal
- HV winding neutral point
- LV winding |
kV RMS
kV RMS
kV RMS |
70
38
10 |
70
38
10 |
| 2.12.2 | Basic impulse level: |
|
|
|
| - HV winding line terminal
- HV winding neutral point
- LV winding | kV (peak)
kV (peak)
kV (peak) | 170
95
30 | 170
95
30 |
| 2.13 | Temperature rise limits at continuous neutral current and rated voltage:
- top oil al ambient temperature
- average copper at ambient temperature
- hot spot windings |
K
K
K |
50
55
68 |
50
55
68 |
| 2.14 | Permissible overload in emergency cases:
- permanent permissible overload based on highest winding temperature which exceeds by 5oC the guaranteed limit |
A |
- | 130% |
| - permanent permissible over voltage based on the maximum top oil temperature which exceeds by 5oC the guaranteed limit at rated power (in % of the rated voltage) | % |
| 110% |
| 2.15 | Oil:
- manufacturer
- type
- data sheet attached |
-
-
- | NYNAS NYTRO 10XN (Inhibited)
-
-
- |
(IEC 60296)
Karamay
DB-25 |
| 2.16 | Bushings | - | - |
|
| 2.16.1 | HV bushings:
- class
- manufacturer
- rated current
- short circuit withstand (3 seconds)
- basic insulation level
- power frequency withstand for 1 minute
- connectors for
- creepage distance |
kV
-
A
kA RMS
kV (peak)
kV RMS
-
mm/kV |
36
-
-
-
170
70
-
31 |
36
Pingxiang Porcelain Co.
400A
2.5kA
170
70
-
31 |
| 2.16.2 | Neutral bushings:
- class
- manufacturer
- rated current
- short circuit withstand (3 seconds)
- basic insulation level
- power frequency withstand for 1 minute
- connectors for
- creepage distance |
kV
-
A
kA RMS
kV (peak)
kV RMS
-
mm/kV |
24
-
-
125
50
-
31 |
24
Pingxiang Porcelain Co.
400A
2.5kA
125
50
-
31 |
| 2.16.3 | LVbushing:
- class
- manufacturer
- rated current
- short circuit withstand (3 seconds)
- basic insulation level
- power frequency withstand for 1 minute
- connectors for
- creepage distance |
kV
-
A
kA RMS
kV (peak)
kV RMS
-
mm/kV |
-
-
-
-
-
-
31 |
1
Pingxiang Porcelain Co.
630
6
-
5
-
31 |
2.17
2.17.1 | Design data:
Maximum flux density in the columns at:
- rated voltage
- 105% of the rated voltage |
tesla
tesla |
-
- |
1.63
1.71 |
| 2.17.2 | Maximum flux density in the yokes at:
- rated voltage
- 105% of the rated voltage |
tesla
tesla |
-
- |
1.63
1.71 |
| 2.17.3 | Maximum current density at ONAN rated power and rated voltage tap:
- HV winding
- LV winding |
A/mm2
A/mm2 |
-
- |
0.172
2.83 |
| 2.17.4 | Winding resistance
- HV winding
- LV winding |
ohms
ohms |
-
- |
1.191
0.001621 |
| 2.17.5 | Primary exciting current, LV side:
- at 0.01 second
- at 0.1 second |
kA
kA |
-
- |
15.6
4.7 |
| 2.17.6 | Core type (core or shell) | - | - | core |
| 2.17.7 | Winding conductor | - | Copper | Copper |
| 3.0 | Weights and dimensions |
|
|
|
| 3.1 | Total weight of unit equipped for start-up | kg | - | 7000 |
|
|
|
|
|
| 3.2 | Weight:
- oil
- core and coil assembling
- tank and accessories
- net copper
- net core steel |
kg
kg
kg
kg
kg |
-
-
-
-
- |
1750
4160
1090
1500
2280 |
| 3.3 | Maximum shipping weight (heaviest item) | kg | - | 7500 |
| 3.4 | Height from foundation to:
- highest point of HV bushing
- highest point of tank
- highest point of conservator tank
- highest point of lifting hook to remove
core and coil assembly |
mm
mm
mm
mm |
-
-
- |
2080
1560
2460
4100 |
| 3.5 | Reactor dimensions:
- length
- width |
mm
mm |
-
- |
2280
1880 |
| 3.6 | Layout no enclosed | - | To be enclosed
with bid |
|
| 3.7 | Maximum shipping dimensions of tank:
- outside height
- outside width
- outside length |
mm
mm
mm |
-
-
- |
2500
2080
2480 |
| 3.8 | Transportation drawing noenclosed | - | - |
|
| 4.0 | Current transformer incorporated into the reactor |
|
|
|
4.1
4.1.1
4.1.2
4.1.3
4.1.4 | CT in HV neutral bushings:
Number of cores per bushing
Primary rated current
Secondary rated current
Accuracy class - protection |
-
A
A
- |
2
1200-600
1
Core-1 : PX
Core-2 : 5P20, 15 VA |
2
1200-600
1
Core-1 : PX
Core-2 : 5P20, 15 VA |
| 4.1.5 | Ratio | - | 1200-600 : 1 | 1200-600 : 1 |
| 4.1.6 | Short circuit withstand (3 seconds) | A | - | 63 |
| 4.1.7 | Continuous secondary current thermal limit | A | - | 1 |
| 4.2 | CT in LV neutral bushing | - | number of cores and class to be coordinated | NON |
| 5.0 | Layout |
|
|
|
| 5.1 | HV winding bushings | - | (3) Long. Axis | (3) Long. Axis |
| 5.2 | Terminal block connection drawing | - | As per enclosed drawings | As per enclosed drawings |
| 6.0 | Standards |
|
|
|
| 6.1 | Manufacturing | - | IEC 60044
IEC 60137
IEC 60296
IEC 60815
IEC 60947 | IEC 60044
IEC 60137
IEC 60296
IEC 60815
IEC 60947 |
| 6.2 | Quality assurance | - | ISO 9001 or Latest IEC Standard | ISO 9001 or Latest IEC Standard |
| 7.0 | Installation | - | Outdoor in substation switchyard | Outdoor in substation switchyard |
| Prod Model: |
DKS |
| Altitude: |
up to 1, 000m Above Sea Level |
| Environment: |
Outdoor |
| Special Conditions: |
Depends on The Customer |
| Insulation Oil: |
High Quality Grade Mineral Oil |
| Tap Changer: |
Regulate The Output Voltage |
| Test Equipment: |
IEC Standard |
| Typical Products: |
DKS-300/33 |
| Frequency: |
50Hz |
| Application: |
Power |
| Phase: |
Three |
| Coil: |
Core-type Transformer |
| Cooling Method: |
Oil-immersed Type Transformer |
| Winding Type: |
Two-winding Transformer |
| Usage: |
Earthing |
| Shape Of Coil: |
Core |
| Brand: |
Tianan |
Ningbo Tianan (Group) Co., Ltd. Was founded in 1969, is a national large
Enterprise, national key high-tech enterprise, industry key enterprises and Zhejiang provincial leading enterprise in power transmission and transforming
Industry. Under the company there are 1 R&D center, 10 specialized subsidiary
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Now the products include 126kV GIS combination apparatus, SF6 circuit breaker, 126kV&252kV power transformer, 252kV and below 252kV outdoor HV disconnecting switch and transformer, boxtype substation below 40.5kV, ring main unit
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