BESS
BESS.COM.UA Energy Systems
UA
Power Distribution Grade

POWER GRID.
TRANSFORMED.

Power transformers from 25 to 2500 kVA and complete transformer substations KTP/KTPN/KTPB with a voltage of 0.4-10 kV. Dry for indoor use, oily for heavy loads.

Design according to DBN. Obtaining technical specifications from OSR. Turnkey installation and commissioning.

0.4-10 kV voltage
IEC 60076 Standard
IP54+ Protection
Power transformers and complete substations of KTP 0.4-10 kV
Voltage Class 10/0.4 kV IEC 60076 Certified
Power Range 25-2500 kVA Dry & Oil-Filled
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Problems of electricity supply in Ukraine

Aging transformer infrastructure, growing loads and new regulatory requirements create critical business risks. Old TPs cannot withstand modern capacities.

Worn out transformers

80% of transformers in Ukraine are older than 25 years. Increased losses, risk of accidents, oil leaks. The equipment is working at the limit of the resource.

Quality of electricity

Voltage drops, harmonic distortion, phase asymmetry. Sensitive equipment goes out of order, the number of defects increases.

Power limitations

Business is growing, but technical specifications do not allow to increase capacity. The old KTP has no reserve, and a new connection costs months of waiting.

New Grid Code requirements

The updated Connection Rules and the Code of Networks require the modernization of the RZA, accounting and automation. Non-compliance can result in fines and suspension.

/// Transform_Solution

Modern transformer solutions

The full cycle: from the inspection of the existing TP to the commissioning of the new equipment. Certified equipment, design according to DBN, warranty up to 5 years.

Dry transformers

No oil, no risk of fire. Ideal for premises: shopping centers, hospitals, data centers. Insulation class F/H. Minimal maintenance, service life 30+ years.

Oil transformers

Proven reliability for outdoor installation. Optimal price for capacities from 100 kVA. Hermetic and of expansion tank. GOST and IEC.

KTP turnkey

Complete transformer substations KTPN (external) and KTPB (block). Transformer + RP 10 kV + cabinets 0.4 kV + accounting + AVR automation in one housing.

Increasers for SES

Step-up transformers 0.4/10 kV for solar power plants. Coordination of the power of inverters by the point of connection to the OSP network.

Technical characteristics

Dry transformers

100-2500 kVA / 10/0.4 kV

  • • Insulation class F (155°C) / H (180°C)
  • • Degree of protection IP23 - IP54
  • • XX losses: 0.15-0.25% of Rn
  • • Fire safety, without oil

Oil transformers

25-2500 kVA / GOST, IEC

  • • Hermetic / of expander
  • • Transformer oil: class I
  • • Service life: 25-30 years
  • • TM, TMG, TMZ series

KTP (KTPN / KTPB)

Complete substations

  • • Kiosks (KTPK) up to 1000 kVA
  • • Blocks (KTPB) up to 2x2500 kVA
  • • IP54 outdoor installation
  • • Factory ready 95%

Switching equipment

RP 10 kV / Cabinets 0.4 kV

  • • Vacuum switches 10 kV
  • • AVR for 2 inputs + section
  • • ASKOE (electricity accounting)
  • • Microprocessor RZA

What is included in "Turnkey"?

  • Examination of the existing TP
  • Design according to DBN
  • Obtaining technical specifications from OSR
  • Delivery by special transport
  • Installation and connection
  • Testing and tuning
Project budget
Upon request

The price depends on the type of transformer, capacity and configuration of the KTP.
Free visit of the engineer to the facility.

We will send a survey letter for calculation.

Certification
Special delivery
Decision Matrix

How to choose a transformer

Comparison of dry-type and oil-type transformers by key parameters for your facility

Parameter
Dry
Oily
Fire safety
High (F1)
Needs an oil pan
Service
Minimal
Oil analysis annually
Cost (kVA)
30-50% higher
Optimal
Noise level
< 55 dB
60-75 dB
Placing
Inside the building
Outside / in a separate TP
Overload capacity
Up to 120% / 2 hours
Up to 150% / 2 hours
Term of service
30+ years
25-30 years

Application matrix

Rooms

Shopping center, shopping center, data center
Dry

Outside / Factory

Industrial zone, Warehouse
Oily

Solar SES

Step-up 0.4/10 kV
Elevating

Hospital

Critical infrastructure
Dry + UPS
Power Calculator

Transformer selection

Select the object parameters for preliminary calculation

400 kVA
100 kVA 2000 kVA
Recommended type Oil TMG
Transformer power 630 kVA
Estimated budget $12 000 - $18 000

For the plant, an oil transformer with an external installation of an oil receiver is recommended.

FAQ

Frequently Asked Questions

A dry transformer does not contain flammable oil, so it is fire-safe and can be installed directly in the building without an oil receiver. It requires minimal maintenance (no oil analysis), runs quieter and has a longer lifespan (30+ years). The main disadvantage is the higher cost (by 30-50%) and lower overloading capacity compared to oil.
The cost of a turnkey KTP depends on the power, type of transformer, completeness of distribution devices and installation conditions. Approximate: KTPN of oil transformer 400 kVA - from $25,000, of dry 630 kVA - from $45,000. Block KTPB for 2x1000 kVA - from $80,000. The price includes design, equipment, delivery, installation, adjustment and commissioning. Exact calculation - according to the results of the inspection of the object.
To replace the transformer without increasing the capacity, the following are required: technical conditions from OSR (distribution system operator), power supply project (EO section), delimitation of balance ownership, test protocols of new equipment. If the capacity is increased - an additional agreement on connection and payment for capacity. We undertake all permit documentation and interaction of OSR.
Typical terms: design -- 2-4 weeks, equipment manufacturing -- 4-8 weeks, obtaining technical specifications from OSR -- 2-6 weeks (in parallel), installation and commissioning -- 1-3 weeks. A total of 8 to 16 weeks depending on the complexity. Transformer replacement without power change - from 4 weeks. We provide a work schedule with clear deadlines at the stage of signing the contract.
Yes. Installation of electrical installations with a voltage of more than 1000 V (and the KTP works with a voltage of 10 kV) requires a license to perform electrical installation works. Our company has all the necessary licenses and permits, including a certificate for high-risk work and an electrical laboratory for testing. The customer does not need a license - we perform all work under our own permit documents.
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6 stages of connection: from audit to launch.
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Ecosystem Integration

Adjacent solutions

Solar + BESS

Industrial SES

Solar power plants of energy storage systems. Step-up transformers 0.4/10 kV for supplying power to the network.

Go to solution
60 - 600 kW

Industrial UPS

Uninterruptible power supplies for critical infrastructure. Uninterrupted power supply during input switching and network failures.

Go to solution