CM-CU275
Diesel generator set built around the Cummins 6LTAA8.9-G2 engine, rated to ISO 8528-1.
- Standby rating
- 275 kVA
- Prime rating
- 250 kVA
- Engine platform
- 6LTAA8.9-G2
- Frequency
- 50 Hz
Commercial Buildings
Offices, hotels, retail centres and residential towers all need standby power that stays out of the way. Cunmi supplies super-silent sets designed for tight plant rooms, roof decks and below-ground car park levels.
The Challenge
Commercial Buildings power requirements
In a city centre there is rarely anywhere convenient to put a generator. The plant room is small, the delivery route is narrow, and the nearest occupied window is a few metres away. Our commercial packages are designed around those constraints rather than around the set.
Every unit is acoustically treated, modular enough to be crane-lifted into a restricted space, and supplied with the controls and changeover gear needed to protect lifts, life-safety circuits and building management systems during an outage.
Recommended Products
Ratings we specify most often for Commercial Buildings
Each rating below is a published row from the brand model tables. Open Size range for the full span, or View for the engine and alternator details.
CM-PK200
Diesel generator set built around the Perkins 1106A-70TAG3 engine, rated to ISO 8528-1.
- Standby rating
- 200 kVA
- Prime rating
- 180 kVA
- Engine platform
- 1106A-70TAG3
- Frequency
- 50 Hz
CM-SD313
Diesel generator set built around the SDEC SC10E380D2 engine, rated to ISO 8528-1.
- Standby rating
- 313 kVA
- Prime rating
- 275 kVA
- Engine platform
- SC10E380D2
- Frequency
- 50 Hz
Solution Highlights
What makes the difference in this application
Super-silent enclosure
Advanced noise attenuation for offices, hotels and residential sites.
Compact modular build
Sized to pass through service lifts, doorways and constrained plant rooms.
Crane and lift ready
Integrated lifting frame and four-point rigging as standard.
Changeover and BMS
ATS, LV switchgear and Modbus / BACnet signalling to the building system.
How projects are delivered
From load schedule to commissioning in commercial buildings
The same three stages run on every order, whatever the configuration: engineering before the quotation, a documented load test before packing, and support after the set is on site.
Step 01
Engineering and sizing
Load schedule, starting currents, ambient and altitude derating are worked through before a rating is proposed — the alternator is sized for the largest step, not the average.
Step 02
Factory build and load test
Assembly, wiring and paint in one works, then a four-point load bank run at 25 / 50 / 75 / 100 % with the test sheet serial-numbered to the set.
Step 03
Shipping, commissioning and support
Export packing, documentation and commissioning guidance, with spare-parts supply and remote diagnosis for the life of the installation.
Featured Project
Backup power for a mixed-use complex
A retail and office complex that could not afford a dark Saturday — what we installed and how it has performed since.
The brief
The complex already had an ageing set that failed its last load test, and the landlord wanted a replacement without closing a single trading hour — the changeover had to happen overnight.
What we supplied
Two 500 kVA silent sets installed in the existing plant room, a new AMF panel and fuel day tank, with the full cutover completed inside one night window.
On site today
The sets start on every monthly test, and the complex has not lost trading hours since handover. Our service team holds the maintenance contract.
- Units
- 2 × 500 kVA silent sets
- Duty
- Standby, auto-start
- Site
- Retail and office complex
- Scope
- AMF panel, day tank and service contract
Related Reading
Further reading on Commercial Buildings power
Technical articles and product updates relevant to this application.
Ready to buy?
Send us the load profile, site conditions and redundancy requirement. A Cunmi sales engineer will come back with a sized recommendation and budget quotation.
I'm ready to proceedHave a technical question?
Sizing, paralleling, noise limits or grid codes — our application engineers answer specification questions before you commit to a configuration.
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Consumables, long-lead items and overhaul kits for the twenty most common platforms, held in regional hubs and quoted with honest lead times.
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