Page 77 - E24 Electrical Notebook

UPS - HITEC DRUPS Design Guide - 73

System Description

HITEC Power Protection’s “Dynamic Rotary UPS” is synonymous with quality and reliability. It filters the incoming utility power and protects against power
interruptions in a simple and effective manner. The unique concept and design of the HITEC Power Protection DRUPS maximises reliability and provides
the customer with the highest possible availability. Depending on the size of the fuel reserve, the DRUPS can provide power for an indefinite period of time.

Kinetic Energy = No Batteries

The INDUCTION COUPLING or ETM and FLYWHEEL is the heart of HITEC Power Protection’s “Dynamic Rotary UPS” system. When utility fails, the
DRUPS retrieves power from the stored kinetic energy and this provides power for the connected load while the diesel engine starts and accelerates up
to full speed.

Alternator & Choke = Active Filter

The careful matching of the alternator and the choke provides a system that acts as a continuous filter which allows the DRUPS to maintain the output
voltage within the strictest tolerances. When mains power is available, the ALTERNATOR supplies reactive power to the load so that the utility sees a
near unity power factor.

HITEC Power Protection DRUPS Product Range

The Model “UPS” ranges from 500 KVA to 2200 KVA and the Model “QPS” ranges from 2500 KVA to 3000 KVA at 50Hz.

Technical Data HITEC Provides Complete Installation Solutions

Range (Single Module) 500 kVA HITEC can supply the complete DRUPS and associated equipment. For
3000 kVA example, our recent complete “End to End” turnkey installations have
From also included the design, supply and installation of:
To 380-415V, 50Hz
380, 440-480, 600V 60Hz • Exhaust silencers / flues, radiators & acoustic attenuation
Input also MV up to 33kV
± 10% • External acoustic housings
Input voltage 0.98
• Local fuel systems & complete bulk fuel storage & transfer systems
Voltage tolerance 380-415V, 50Hz
CosØ at rated voltage 380, 440-480, 600V 60Hz • Low Voltage & High Voltage (11kV) switchboards
also MV up to 33kV
Output ± 1% • HV to LV ‘power’ transformers
± 5-10% (depending on
Output voltage system configuration) • Fire detection & suppression systems
50-250 mS (depending on
Voltage tolerance steady state system configuration) • Complete mechanical & electrical installation of DRUPS & ancillaries
Dynamic state ± 1%
Max 2% • Offloading & erection at site
During With linear
0.8 • Commissioning & testing by our own personnel
Frequency tolerance 15 x rated current
Voltage asymmetry 97% (depending on system System Configurations & Features
Harmonic distortion configuration)
& non linear load • Parallel Redundant (PR): the simplest means of achieving
Power factor redundancy between UPS units and of supporting very large or
Efficiency up to multiple loads. This can be at either LV or MV.

Energy Storage Optimization Mode • Master / Slave (MS): This is a two module system that eliminates a
common UPS output busbar.
The energy storage optimization mode (ESO mode) reduces the
accumulated flywheel energy to the level that is needed to support the • Parallel Cross Link (CL): Normally operates as two separate parallel
critical load while the diesel engine starts. Hence at low load, the speed systems, but allows for automatically connecting the outputs together
of the energy store can be reduced, thus saving energy. to make one parallel system. On multi-UPS unit systems, requires
fewer UPS units to achieve required redundancy than two separate
Diesel Start Reduction Feature systems.

The diesel start reduction feature delays the starting of the diesel engine • Isolated Parallel (IP): No common paralleling busbar, each unit
for short interruptions of the mains supply, so saving diesel and reducing normally supports its own load. IP busbar for load sharing and
the resultant diesel engine emissions. redundancy. Overcomes fault level issues with isolating chokes.

• Isolated Redundant (IR): No common output busbar due to
separation of loads and UPS unit outputs. Redundancy provided by
stand-alone “redundant” module which switches without a break to
take the load of any single module.

• Distributed Redundant (DR): No common output busbar. Each load
centre is supplied from at least two separate DRUPS modules by a
static transfer switch. Hence the system redundancy is across all the
DRUPS modules.

Hitec Power Protection Ltd Tel : 01926 484535

Unit B21a Holly Farm Business Park Fax : 01926 484336

Honiley

Kenilworth Email : sales.uk@hitec-ups.com

Warwickshire CV8 1NP Website : www.hitec-ups.com