St. Vladimir Children’s Clinical Hospital in Moscow is a paediatric healthcare facility where power continuity is critical. Devpan supplied the main distribution, motor control, power factor correction and floor boards for the project.
Electrical Profile of the Project
- LocationMoscow, Russia
- Building typeHospital
- Installed power≈ 6,400 kVA
- Transformer configuration4 × 1,600 kVA
- Main busbar rated current2 × 3,200 A
- Short-time withstand current (Icw)65 kA / 1 s
- Devpan scopeLow voltage switchboards, engineering and site coordination
- Verification standardIEC 61439-1, IEC 61439-2
About the Project
In a children’s hospital, intensive care, neonatal units and operating theatres cannot tolerate even a short interruption. Moscow’s 10 kV urban network is generally dependable, yet the long, harsh winters place heavy and sustained demand on heating, ventilation and pumping systems. For a hospital of this scale the installed power is typically around 6,400 kVA, and a large share of the load consists of medical devices and sensitive electronics. The distribution architecture therefore has to combine high continuity of supply with selective isolation of any fault, so that a local problem never becomes a building-wide outage.
The typical answer is a split main distribution board rated 2 × 3,200 A, fed from four 1,600 kVA transformers and divided by a bus coupler. If a transformer or incoming feeder is lost, the coupler transfers the load to the healthy section. A 2 × 1,250 kVA generator set picks up life-safety loads in a defined priority order, while theatre and ICU circuits are bridged by uninterruptible power supplies. Form 4a – Form 4b segregation lets maintenance proceed on one functional unit while neighbouring outgoing circuits stay energised.
Devpan Scope and Switchboard Architecture
Devpan’s scope covers the low-voltage system from the transformer outgoing terminals to the final distribution points on the clinical floors.
- Main distribution boards (DevPanel): 2 × 3,200 A, 65 kA / 1 s, dual section with bus coupler and generator changeover.
- Motor control centres (DevControl): Drive and starter feeders for air handling units, chillers and heating pumps.
- Floor and service boards (DevBox): Sub-distribution for clinical floors, laboratories and administrative areas.
- Power factor correction (DevComp): Stepped, detuned reactive power compensation.
- Lighting and power panels (DevPower): General and emergency lighting circuits plus small power supplies.
Technical Configuration
| Installed power | ≈ 6,400 kVA |
|---|---|
| Transformer configuration | 4 × 1,600 kVA |
| Medium voltage level | 10 kV |
| Low voltage / frequency | 400 / 230 V, 50 Hz |
| Main busbar rated current | 2 × 3,200 A |
| Short-time withstand current (Icw) | 65 kA / 1 s |
| Form of internal separation | Form 4a – Form 4b |
| Degree of protection (IP) | IP31 – IP41 |
| Generator back-up | 2 × 1,250 kVA |
| Verification standard | IEC 61439-1, IEC 61439-2 |
Devpan Products Used in This Project
Project-Specific Engineering Topics
Redundant supply with bus coupler
Two independent busbar sections are linked by a coupler breaker, so a transformer failure is covered by automatically transferring load to the other section.
Life-safety load priority
When the generators start, ICU, theatre and neonatal loads are restored first and secondary loads follow in stages.
Selectivity across levels
Protective devices from the main board down to floor boards are coordinated so that a fault opens only the affected circuit.
Harmonics and power quality
Harmonics from imaging equipment and variable speed drives are limited by detuned compensation, keeping voltage quality within limits.
Frequently Asked Questions
What is the installed power for a hospital like St. Vladimir Children’s Clinical Hospital?
For a children’s hospital of this scale the installed power is approximately 6,400 kVA, with a typical transformer configuration of 4 × 1,600 kVA. The main busbar is typically 2 × 3,200 A with a short-time withstand of 65 kA / 1 s, fed from a 10 kV medium-voltage network.
How is the hospital supplied during a grid outage?
Typically a 2 × 1,250 kVA generator set starts through automatic changeover, while critical clinical circuits ride through the generator start-up on uninterruptible power supplies.
Why is Form 4 segregation used in hospital switchboards?
Form 4a – Form 4b segregation allows work on one outgoing unit while the others remain energised, so clinical services continue during maintenance.
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Skolkovo Operating Theatre and Intensive Care BuildingHospital · Moscow, RussiaDo you have a project of a similar scale?
Send us your single-line diagram, your transformer rating or simply your load list. Our engineering team runs the short-circuit and discrimination study and defines the form of separation and busbar cross-section with you.
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