Substation distribution transformers have covered primary and secondary bushings and may be equipped with on-load tap-changers (LTC). They are usually connected directly to overhead utility power lines.
Unit substation distribution transformers are often tightly coupled to switchgear, motor controls, bus ducts, or other types of incoming and outgoing equipment.
GNEE's proven design provides superior mechanical strength, which has been proven through years of service and special testing. GNEE uses a low-frequency heating insulation drying process, where the insulation material dries in its own tank and is never exposed to the atmosphere after drying.
Product scope
Rated power: up to 10,000 kVA
Rated voltage: up to 33 kV
Cooling type: ONAN / ONAF
Available fluids: mineral oil and ester fluids (natural and synthetic)
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Technical Data Of YB Pre-installed Substation
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HV
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Ltem
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Unit
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Date
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Rated Frequecy
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Hz
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50
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Rated Voltage
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kV
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6 10 35
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Max Working Voltage
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kV
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6.9 11.5 40.5
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Industrial Requency Voltage-resisting
Time／isolationBallisticVoltage-resisting |
kV
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32/36 42/48 95/118
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Thunderand Lighting Ballistic
Voltage-resistingTime／isolation SectionalPort |
kV
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60/70 75/85 185/215
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Rated Current
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A
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400 630
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Rated Brief-period Current-resisting
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kA
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12.5(2s) 16(2s) 20(2s)
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Rated Crest Value Current-resisting
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kA
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32.5 40 50
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LV
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Rated Voltage
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V
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380 220
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Rated Current Of Major Return Circuit
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A
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100-3200
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Rated short-circuit Current-resisting
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kA
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15 30 50
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Rated Crest Value Current-resisting
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kA
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30 63 110
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Branch Circuit
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A
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10-800
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Quantity Of Branch
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line
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1--12
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Compensation Circuit
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kVAR
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0-360
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Transtorming
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Rated Capacity
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kVA
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50-2000
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Short-circuit Impendance
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%
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4 6
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Scope Of Branch Connection
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±2x2.5% ±5%
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Vector Group
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Yyn0 Dyn11
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Substation Transformer | Outdoor Indoor |
Used Substation Transformers Feature
Voltage Transformation:
The primary function of substation transformers is to transform voltage levels. They can step up voltage for long-distance transmission or step down voltage for distribution to consumers.
Types of Substation Transformers:
Power Transformers: These transformers are used for bulk power transmission and are typically located at the generating stations and major substations.
Distribution Transformers: These transformers are deployed in distribution networks to step down voltage for supply to homes, businesses, and other end-users.
Step-Up and Step-Down Transformers:
Step-Up Transformers: Increase the voltage from the generator output to the transmission voltage level.
Step-Down Transformers: Decrease the voltage to distribution levels suitable for supplying power to homes and businesses.
Three-Phase Configuration:
Most substation transformers are designed to work with three-phase electrical systems, providing a balanced and efficient power distribution solution.
Cooling Systems:
Transformers generate heat during operation, and efficient cooling is essential. Cooling systems can include natural convection, forced air, or oil circulation methods to dissipate heat and maintain optimal operating temperatures.
Oil-Immersed Transformers:
Many substation transformers are oil-immersed, where the transformer core and windings are immersed in a cooling and insulating oil. The oil provides both insulation and aids in dissipating heat.
Dry-Type Transformers:
In some cases, substations may use dry-type transformers, where the core and windings are not immersed in oil. Dry-type transformers are often chosen for environmental or safety reasons.
GNEE's distribution transformers are designed for a variety of utility, contractor and industrial applications and are manufactured under strict quality control and standards compliance for high reliability. We use state-of-the-art technology in our design and manufacturing systems and quality assurance programs to provide you with reliable and cost-effective transformer products that meet your system requirements.
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The company is mainly engaged in the production of epoxy resin dry-type transformers, three-dimensional triangular wound core transformers, power transformers and intermediate frequency furnace transformers. Products include SCB10, SCB12, SCB13, SCB14, SCB18, S11-M, S13-M, S13-MRL, S20 and S22 series distribution transformers.
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