Power Transformer 100KVA 33/0.415KV
GZ Industrial Supplies is the distributor of Power Transformer 100KVA 33/0.415KV in Nigeria. We have a complete range of copper distribution transformers designed to grant the reliability, durability, and efficiency required in utility, industrial, and commercial applications.
Our distribution transformers are designed and manufactured to the highest quality standards to ensure enduring reliability, a characteristic necessary to foster peace of mind amongst customers and consumers. It is used for indoor or outdoor applications and can be provided with off-load and on-load tap changers.
Technical Specifications of Power Transformer 100KVA 33/0.415KV
- Product name Liquid-Filled Groundmount Transformer; 3PH, 100 kVA, HV 33000D , LV 415yn
- Rated Power: 100[kVA]
- Insulation Liquid Mineral Oil
- High Voltage: 33000[V]
- High Voltage tappings (DETC) +2 -2 2.5%
- Low Voltage at no load: 415 [V]
- High Voltage insulation level [kV] LI 170 / AC 70 / Um 36
- Low Voltage insulation level [kV] LI - / AC 3 / Um 1.1
- Frequency: 50[Hz]
- Number of Phases: 3
- Vector Group: Dyn11
- Ambient temperature max./monthly/annual average °C 40 / / 20
- Max. average temperature rise (Oil/Winding) [C/C] 60 / 65
- Surface treatment Painted, RAL 7033 Altitude (a.s.l.) [m] <1000
- Location Indoor/Outdoor
Frequently Asked Questions
What is a 100 kVA 33/0.415 kV power transformer and how does it work?
A 100 kVA 33/0.415 kV power transformer is a three-phase distribution transformer designed to step down high voltage (33 kV) to low voltage (0.415 kV) suitable for industrial and commercial power loads. Transformers work by electromagnetic induction between primary and secondary windings, transferring electrical energy efficiently while changing voltage levels to match user requirements.
Where are 100 kVA 33/0.415 kV transformers typically used?
These transformers are commonly used in:
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Industrial facilities and workshops
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Commercial buildings and complexes
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Power distribution substations
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Small to medium-sized industrial plants
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Sites requiring stable low-voltage supply from medium-voltage networks
Their 100 kVA rating strikes a balance between capacity and cost, making them suitable for applications where dependable stepped-down power is needed for motors, lighting, and heavy equipment.
How much current can a 100 kVA 33/0.415 kV transformer supply?
To estimate the maximum current capacity, you use the formula:
? Current (A) = Transformer rating (VA) ÷ Voltage (V)
For a three-phase 100 kVA transformer at 0.415 kV on the secondary side, this comes out to approximately:
≈ 277 A per phase
This means the transformer can safely supply up to around 277 A across three phases for balanced loads.
What are key technical features of a 100 kVA 33/0.415 kV transformer?
Important specifications typically include:
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Rated power: 100 kVA
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Primary voltage: 33 kV
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Secondary voltage: 0.415 kV
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Phase: Three-phase
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Cooling: Oil-immersed natural cooling (ONAN)
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Vector group: Often Dyn11 (HV delta / LV star with neutral)
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Temperature rise limits: Designed for continuous operation under load
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Standards compliance: Built to international/industrial standards (e.g., IS/IEC)
These features ensure reliable performance, efficient cooling, and compliance with power distribution norms.
What factors should I consider before choosing a 100 kVA 33/0.415 kV transformer?
When selecting a transformer of this rating, consider:
- Load requirements: Total kVA load and future expansion
- Voltage levels: Compatibility with utility supply (33 kV) and your equipment voltage (0.415 kV)
- Cooling method: Oil-immersed vs dry type based on environment
- Installation location: Outdoor vs indoor site and environmental exposure
- Compliance & standards: Adherence to relevant safety and electrical standards
- Maintenance and support: Accessibility of spare parts and service
Matching transformer specifications to your actual load and site conditions enhances efficiency, reduces losses, and prolongs service life.
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