Gold Member Since 2005
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Ningbo Tianan Group Co., Ltd.

Transformer, Earthing Transformer, Grounding Transformer manufacturer / supplier in China, offering 33/0.415kV Oil-immersed Substation Earthing Transformer, Oil Immersed Power Transformer Three Phase Electric Arc Furnace Transformer, 35kv~220kv Electric Transformer Substation and so on.

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Supplier Homepage Product Power Transformer 33/0.415kV Oil-immersed Substation Earthing Transformer

33/0.415kV Oil-immersed Substation Earthing Transformer

Purchase Qty.:
(Pieces)
1-9 10+
FOB Unit Price: US $10,000 US $8,000
Purchase Qty. (Pieces) FOB Unit Price
1-9 US $10,000
10+ US $8,000
Get Latest Price
Port: Ningbo, China
Production Capacity: 5000 Sets/ Year
Payment Terms: L/C, T/T

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Basic Info
  • Model NO.: DKS
  • Phase: Three
  • Cooling Method: Oil-immersed Type Transformer
  • Certification: ISO9001-2000
  • Frequency Characteristics: Power Frequency
  • Brand: Tianan
  • Environment: Outdoor
  • Insulation Oil: High Quality Grade Mineral Oil
  • Test Equipment: IEC Standard
  • Frequency: 50Hz
  • Transport Package: Wooden Pallet
  • Origin: China
  • Application: Power
  • Core: Core-type Transformer
  • Winding Type: Two-winding Transformer
  • Usage: Earthing
  • Shape of Core: Core
  • Altitude: up to 1, 000m Above Sea Level
  • Special Conditions: Depends on The Customer
  • Tap Changer: Regulate The Output Voltage
  • Typical Products: DKS-300/33
  • Trademark: TIANAN
  • Specification: IEC
  • HS Code: 850423110
Product Description
 
TECHNICAL DATA SCHEDULE
34.5 kV EARTHING CUM STATION SERVICE TRANSFORMER
 
ITEMDESCRIPTIONUNITSREQUIREDGUARANTEED
1.0Manufacturer--
 
1.1Type-Three-phase with 1 windingDKS-300/34.5
1.2Class
 
-
 
2.0Rated data and characteristics
 

 

 
2.1Rated 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
2.2Rated frequencyHz5050
2.3Connection of the 3 phase windings (group of vectors IEC)
-

Znyn1
Znyn1
2.4Rated capacity:
 

 

 
2.4.1Rated continuous neutral current of HV windingA2020
2.4.2Rated power of secondary windingkVA300300
2.5Cooling-ONANONAN
2.6Excitation current at rated voltageA-0.4
2.7Impedance--
 
2.7.1Zero-sequence impedance of HV windingohms2020
2.7.2Direct sequence impedance of LV winding at rated power%66
2.8Tolerance to be applied to the impedance, in terms of % the guaranteed value
%

7.5
7.5
2.9Short-circuit withstand--
 
2.9.1HV winding capacity to withstand external short-circuits:
- short-circuit duration
- short-circuit current withstand the   indicated period


Sec.
A RMS


10
3600


10
3600
2.9.2Short-circuit duration for LV windingsec22
2.10Guaranteed losses
 

 

 
2.10.1No-load losses at rated voltage and frequencykW-2.6
2.10.2No-load losses capitalized valueUS $/kW30003000
2.10.3Tolerance to be applied to no-load losses
(in % of the guaranteed value)
%+10+10
2.10.4On-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
2.10.5On-load losses  capitalized valueUS $/kW10801080
2.10.6Tolerance to be applied to no-load losses
(in % of the guaranteed value)
%+10+10
2.11Highest 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
2.12.2Basic impulse level:
 

 

 

 
- HV winding line terminal
- HV winding neutral point
- LV winding
kV (peak)
kV (peak)
kV (peak)
170
95
30
170
95
30
2.13Temperature 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
2.14Permissible 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%
2.15Oil:


- manufacturer
- type
- data sheet attached


-
-
-
NYNAS NYTRO 10XN (Inhibited)
-
-
-

(IEC 60296)
Karamay
DB-25
2.16Bushings--
 
2.16.1HV 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
2.16.2Neutral 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
2.16.3LVbushing:
- 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
2.17.2Maximum flux density in the yokes at:
- rated voltage
- 105% of the rated voltage

tesla
tesla

-
-

1.63
1.71
2.17.3Maximum current density at ONAN rated power and rated voltage tap:
- HV winding
- LV winding


A/mm2
A/mm2


-
-


0.172
2.83
2.17.4Winding resistance
- HV winding
- LV winding

ohms
ohms

-
-

1.191
0.001621
2.17.5Primary exciting current, LV side:
- at 0.01 second
- at 0.1 second

kA
kA

-
-

15.6
4.7
2.17.6Core type (core or shell)--core
2.17.7Winding conductor-CopperCopper
3.0Weights and dimensions
 

 

 
3.1Total weight of unit equipped for start-upkg-7000

 

 

 

 

 
3.2Weight:
- oil
- core and coil assembling
- tank and accessories
- net copper
- net core steel

kg
kg
kg
kg
kg

-
-
-
-
-

1750
4160
1090
1500
2280
3.3Maximum shipping weight (heaviest item)kg-7500
3.4Height 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
3.5Reactor dimensions:
- length
- width

mm
mm

-
-

2280
1880
3.6Layout no enclosed-To be enclosed
with bid

 
3.7Maximum shipping dimensions of tank:
- outside height
- outside width
- outside length

mm
mm
mm

-
-
-

2500
2080
2480
3.8Transportation drawing noenclosed--
 
4.0Current 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
4.1.5Ratio-1200-600 : 11200-600 : 1
4.1.6Short circuit withstand (3 seconds)A-63
4.1.7Continuous secondary current thermal limitA-1
4.2CT in LV neutral bushing-number of cores and class to be coordinatedNON
5.0Layout
 

 

 
5.1HV winding bushings-(3) Long. Axis(3) Long. Axis
5.2Terminal block connection drawing-As per enclosed drawingsAs per enclosed drawings
6.0Standards
 

 

 
6.1Manufacturing-IEC 60044
IEC 60137
IEC 60296
IEC 60815
IEC 60947
IEC 60044
IEC 60137
IEC 60296
IEC 60815
IEC 60947
6.2Quality assurance-ISO 9001 or Latest IEC StandardISO 9001 or Latest IEC Standard
7.0Installation-Outdoor in substation switchyardOutdoor in substation switchyard





 
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