Hitec Power Protection - LV & MV UPS Systems

MV Rotary Diesel - UPS - Benefits - Dual Output - Data Centre Ride Through Systems

Data Centre Solutions

Hitec’s UPS Rotary Diesel Output (DRUPS) system is currently the only UPS to have gained Uptime Institute ‘Tier’ certification at a data centre application within the UK, Europe and the whole of the EMEA.

Low Voltage or Medium Voltage System

For relatively lower power UPS applications, low voltage ups systems are the most effective means of connecting modules together to meet the required load and provide redundancy. However, as the load grows, the number of modules that can be connected together, in a parallel configuration, becomes restricted by the fault current limitations of both LV circuit breakers and switchgear. To overcome this, Hitec has developed other solutions for multi-module LV systems such as isolated redundant and distributed redundant. In fact Hitec has several installations of up to 12 modules operating together in an isolated redundant configuration.

Benefits of an MV Uninterruptible Power Supplies System - MV Diesel Rotary UPS Systems

Many customers with large critical load requirements require the simplicity and flexibility offered by parallel systems. To meet this requirement, Hitec offers Medium Voltage parallel systems; these are most commonly at 11kV in the UK but voltages up to 24 kV have been used Worldwide.

Reasons to use MV DRUPS Systems include:

• Low fault current compared to both standard circuit breaker & switchboard ratings
• A greater number of modules can be connected together in parallel
• Lower operating currents allows the use of smaller size MV cables
• More cost effective installation for substantial facilities & sites covering a large area

Active Redundancy Control - Continuous Support of IT & Cooling Critical Loads with MV UPS Systems

With the current trend being to use high density IT (Blade Servers) in data centre applications, the continued operation of the cooling system has increasingly become a critical issue, even as critical as the continued operation of the IT equipment itself. So much so that even very short supply failures to the cooling plant can cause the server racks to overheat. To overcome this problem Hitec’s Active Redundancy Control makes full use of the “spare” capacity of the redundant module to provide a No-Break electrical supply to the cooling system from the DR-UPS system, while in no way compromising the security of the IT loads.

Ride-Through Systems

Hitec’s Ride-Through system has been developed to bridge short interruptions in the mains voltage. It provides 15 seconds of Ride-Through power at full load, which is sufficient to overcome the majority of power disturbances of the Utility supply. The Ride-Through system can also bridge the gap between a power outage and the time required to start a standby diesel genset and so it can be used as part of a complete power protection system as the system also continuously conditions the power to the critical load. Its main application will be for customers who have already sufficient back up power from standby diesel gensets but require continuous and conditioned power for their mission critical processes and so avoid downtime.

Ride-Through modules are rated at 1250 kVA (1000 kW) and can operate at up to 22 kV. Modules can be paralleled to give both higher output power systems and longer ride through durations.