33/0.415kV Oil-immersed Substation Earthing Transformer

US$10,000.00
1-9 Pieces
US$8,000.00
10+ Pieces
Port:
Ningbo, China
Production Capacity:
5000 Sets/ Year
Payment Terms:
L/C, T/T

Last Login Date:

Jul 02, 2025

Business Type:

Manufacturer/Factory, Trading Company

Main Products:

Transformer, Substation, Switchgear, Load Switch, Circuit Breaker, Insulated Switechgear, Furnace Transformer, Hv Disconnector, Ring Main Unit, Sf6 Circuit Breaker

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Product Description

Company Info

Basic Info.

Model NO.
DKS
Application
Phase
Cooling Method
Oil-immersed Type Transformer
Certification
Frequency Characteristics
Power Frequency
Shape of Core
Core
Brand
Tianan
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
Trademark
TIANAN
Transport Package
Wooden Pallet
Specification
IEC
Origin
China
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)-Znyn1Znyn1
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%7.57.5
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
kV3636
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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