Piller Isolated Parallel (IP) System
An isolated parallel system (IP bus) gives each UPS its own load but connects all units to a common ring through chokes. It combines the advantages of isolated and parallel redundancy.
- Data centres requiring Tier IV
- Large sites where space and capital must be optimised
- Modular expansion in line with growth
Technical data
| Manufacturer | Piller |
| Type | Configuration |
| Certification | Tier IV Scheme Approved (Uptime Institute) |
| Efficiency | Modules near optimum efficiency (c. 97 %) |
| Size | Low voltage up to 20 MW |
| Installed | Over 500 MVA installed globally |
Source: www.piller.com.
Technology
How it works
On a fault or service at one UPS, its load is fed through the ring from the other units. The system balances naturally and avoids unnecessary switchgear operations during faults.
Because redundant units are kept to a minimum and none run in standby, the modules operate close to their optimum efficiency.
Application
Where it fits
- Data centres requiring Tier IV
- Large sites where space and capital must be optimised
- Modular expansion in line with growth
Versions and options
- With UBT+, UBTD+ or DeRUPS™
- Low or medium voltage
Service
Operation and maintenance
Concurrent maintainability means individual UPS units can be taken out for service while the load remains protected.
A rotary plant should always be load-tested at commissioning – stepped load, utility failures and transfer to engine.
Other models from Piller
Read more at Bluecircle
Norwerk’s partner Bluecircle has in-depth pages on the topic.
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