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Oil-Immersed Transformer
33/0.415kV Oil-immersed Substation Earthing Transformer
Port:
Ningbo, China
Production Capacity:
5000 Sets/ Year
Payment Terms:
L/C, T/T
Zhejiang, China
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
Winding Type
Certification
Usage
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 | ||||
---|---|---|---|---|
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 |
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