Transformer explosion protection | Kazakhstan 2026

Project Background

    The 25-YD238 project involves a reactor installation at the 110 kV Zhanaozen Thermal Power Plant (ТЭЦ) substation in the South Kazakhstan power grid, Kazakhstan. For this project, Zhejiang Rsafele Electric Co., Ltd. supplied a Transformer Explosion Protection solution designed to improve fire safety for oil-filled high-voltage electrical equipment.

     In regions such as Kazakhstan, where winter temperatures can drop to -40°C, reliable transformer explosion protection and fire prevention are important considerations for power infrastructure. Fire protection equipment must be carefully evaluated for low-temperature operating conditions, control system reliability, and compatibility with substation remote monitoring systems.

     The supplied transformer explosion protection system uses an oil-draining and nitrogen-injection fire extinguishing design to help suppress transformer fires and reduce the risk of fire escalation. During the customer acceptance process, technical discussions covered low-temperature operating reliability, remote monitoring signal integration, and on-site installation and commissioning requirements.

    The engineering team also demonstrated the explosion-proof diaphragm pressure relief mechanism, control system integration, and key component operation using a physical demonstration unit. These activities provided an opportunity to review the system's design features and control logic for the project's demanding application environment.

Technical Specification

Drawings

Oil gas separation tank

The oil-gas separation tank is an important component of the Transformer Explosion Protection system. It is designed to support the separation and controlled handling of oil and gas during emergency oil drainage. With a robust tank structure, it helps ensure coordinated operation of the oil-draining and nitrogen-injection fire extinguishing system, providing reliable fire protection for oil-filled transformers and other power equipment.

Shut-off valve

The counterweight-type flow shut-off valve is a key mechanical component of the Transformer Explosion Protection system. Its counterweight mechanism controls oil flow in the drainage pipeline according to the designed operating sequence. With a straightforward mechanical structure, the valve supports coordinated system operation and reliable oil flow control during transformer fire protection.

     During the factory acceptance inspection of the Transformer Explosion Protection system, Zhejiang Rixin Electric worked closely with the customer's technical team to carry out 27 routine test procedures in accordance with the project's specified requirements and the referenced NFPA 850 series standards. The tests covered visual inspection, electrical performance, mechanical operation, and interlock protection functions.

    For the coating inspection, the team first verified the calibration certificates of the measuring instruments and checked their accuracy using reference blocks. The measured paint coating thickness exceeded 120 μm, surpassing the project's minimum requirement of 100 μm. This coating thickness helps improve corrosion protection and supports the long-term durability of the transformer explosion protection equipment.

    The FAT help verify product quality, mechanical functionality, and protection system performance before delivery, providing customers with greater confidence in their transformer fire protection solutions.

    The successful customer acceptance activities for the Kazakhstan 110 kV reactor project highlighted the importance of reliable Transformer Explosion Protection in high-voltage power facilities. Designed for oil-filled electrical equipment, the solution combines oil drainage, nitrogen injection, and diaphragm-based pressure relief to help control transformer fire incidents and mitigate the risk of explosion-related damage.

    During the acceptance process, the customer reviewed the transformer explosion protection system's pressure relief structure, control logic, and manufacturing quality. The engineering team also addressed practical considerations related to remote monitoring integration, on-site installation, and commissioning under extreme cold-weather conditions.

    For power utilities, substations, and industrial facilities, an effective transformer fire protection system is an important part of electrical equipment safety management. Zhejiang Rsafele Electric provides transformer explosion protection solutions for oil-filled power equipment, with a focus on practical system integration, dependable design, and ease of maintenance. This project demonstrates the company's experience in supporting specialized fire protection requirements for high-voltage power infrastructure in challenging environments.

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