Astana Gas-Fired Boiler House is a heat-generation facility in the capital of Kazakhstan. Devpan supplied the power distribution for this project, from Dev24/36 medium-voltage switchgear down to the motor control centres.
Electrical Profile of the Project
- LocationAstana, Kazakhstan
- Building typePower plant
- Installed power≈ 2,500 kVA
- Transformer configuration2 × 1,250 kVA
- Main busbar rated current2 × 1,600 A
- Short-time withstand current (Icw)50 kA / 1 s
- Devpan scopeMedium voltage switchgear, low voltage switchboards and engineering
- Verification standardIEC 61439-1, IEC 61439-2
About the Project
Astana is one of the coldest capitals in the world, with winter temperatures that can reach -40 °C. In this climate a boiler house outage is far more than a comfort issue: it risks frozen pipework and serious damage to the district heating network. Circulation pumps, burner fans and feedwater pumps must run without interruption, while large motor starts must not cause voltage dips on the supply. Dust, humidity and temperature swings in the plant rooms also shape equipment selection.
In a typical configuration the 10 kV incoming supply is distributed through Dev24/36 modular panels to approximately 2 × 1,250 kVA transformers. On the low-voltage side, DevPanel boards with a 2 × 1,600 A main busbar operate as two half-busbars with a bus coupler, so critical loads can be fed from the remaining transformer if one is lost. DevControl MCCs drive pump and fan motors through variable speed drives and soft starters. A generator of around 800 kVA carries the priority loads needed to keep circulation running during a grid outage.
Devpan Scope and Switchboard Architecture
Devpan’s scope runs from the medium-voltage intake to the motor and auxiliary feeders of the boiler house.
- MV switchgear (Dev24/36): 10 kV incomer, metering and transformer protection panels in a metal-enclosed modular design with 24 kV rated insulation.
- Main distribution boards (DevPanel): 2 × 1,600 A main busbar, 50 kA / 1 s, Form 3b, bus coupler and generator changeover.
- Motor control centres (DevControl): VSD and soft-starter feeders for circulation pumps, burner fans and feedwater pumps, IP54-IP55.
- Power factor correction (DevComp): stepped, detuned reactive power compensation for a motor-dominated load profile.
- Sub-distribution boards (DevBox): lighting, trace heating, control room and auxiliary service supplies.
Technical Configuration
| Installed power | ≈ 2,500 kVA |
|---|---|
| Transformer configuration | 2 × 1,250 kVA |
| Medium voltage level | 10 kV (Dev24/36) |
| Low voltage / frequency | 400 / 230 V, 50 Hz |
| Main busbar rated current | 2 × 1,600 A |
| Short-time withstand current (Icw) | 50 kA / 1 s |
| Form of internal separation | Form 3b |
| Degree of protection (IP) | IP54 – IP55 |
| Generator back-up | 1 × 800 kVA |
| Verification standard | IEC 61439-1, IEC 61439-2 |
Devpan Products Used in This Project
Project-Specific Engineering Topics
Heating continuity
Circulation and feedwater pumps are defined as priority loads, and the generator picks them up within seconds of a grid failure.
Motor start management
Large pump and fan motors are started via VSDs or soft starters to limit voltage dips and mechanical stress.
Harmonic control
Because of the drive-heavy load profile, compensation steps use detuned reactors to reduce the risk of resonance.
Cold-climate conditions
Anti-condensation heaters and thermostats protect equipment outside heated rooms, while IP54-IP55 enclosures guard against dust and moisture.
Frequently Asked Questions
What is the installed power of a facility like Astana Gas-Fired Boiler House?
For a gas-fired boiler house of this scale the installed power is approximately 2,500 kVA, with a typical transformer configuration of 2 × 1,250 kVA. The main busbar is typically rated 2 × 1,600 A with a short-time withstand of 50 kA / 1 s, and the medium-voltage level is 10 kV.
Why use Dev24/36 MV switchgear in a boiler house?
The metal-enclosed modular design provides transformer protection on a 10 kV network in a compact footprint, and the 24 kV insulation level adds a safety margin against voltage fluctuations.
How is heating maintained during a grid outage?
Typically a generator of around 800 kVA takes over priority loads such as circulation pumps, burner controls and control systems through automatic changeover, while secondary loads are reconnected step by step.
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