Maximum accessibility, lowest cost per kVA
The table below compares the three enclosure types at equal electrical rating.
| Technical Parameter | Open Type | Silent Type | Containerized |
|---|---|---|---|
| Typical power range | 10 – 4,000 kVA | 10 – 4,000 kVA | Up to 4,000 kVA |
| Enclosure | None — open skid | Galvanised acoustic canopy | 10 / 20 / 30 / 40 / 45 ft container |
| Ingress protection | IP21 (control panel IP54 optional) | IP54 | IP54 (IP55 optional) |
| Ambient design temperature | 40 °C (50 °C optional) | 40 °C (50 °C optional) | 40 °C / 50 °C |
| Best suited to | Indoor plant rooms, container frames, OEM integrations | Hospitals, hotels, offices, telecom, residential standby | Data centres, plants, offshore, rapid deployment projects |
| Factory testing | Load tested at 25 %, 50 %, 75 % and 100 % load | Load tested at 25 %, 50 %, 75 % and 100 % load | Load tested at 25 %, 50 %, 75 % and 100 % load |
Cunmi open-type sets are built on a heavy-gauge steel skid with anti-vibration mounts, an integrated fuel tank and a fully wired control panel. They are the right answer for plant rooms that already provide their own acoustic treatment and ventilation.
Open framing exists to be worked on. Filters, belt drive and the control panel sit behind a single service side, and the engine arrives fully wired, so commissioning is connection rather than fabrication.
The skid adapts to the building instead of fighting it: anti-vibration mounts as standard, the fuel tank integral or remote, and heat rejection handled by the site radiator when the room cannot supply enough cooling air.
Every component visible. Every service point within reach.
Reference deployments showing the rating, voltage and engine platform behind each configuration — the same build standard we apply to every order.
5 × 1.2 MW · 400 V · 50 Hz
Mitsubishi S12R-PTAA2-C + Leroy Somer LSA50.2 L8
Five open-skid sets running as the prime source for oil-extraction operations, where the skid format keeps every service point accessible between shifts.
2 × 1.6 MW · 400 V · 50 Hz
MTU 16V4000G23 + Leroy Somer LSA52.3 S7
Two heavy-duty MTU-powered sets delivering continuous energy for critical field operations, deployed quickly and maintained on site without a building around them.
2 × 1.8 MW · 11 kV · 50 Hz
Mitsubishi S16R2-PTAW-C
An 11 kV open-skid pair feeding high-load distribution directly, removing the need for a separate step-up transformer at the well site.
Send us the site plan, noise limit and ambient conditions. We will recommend the enclosure type and confirm the acoustic performance.
