The MULTI SENTRY Battery Care System optimises battery performance, to help extend their working life and ensure that the UPS can deliver its full-rated back-up time when called upon in an emergency.

Battery recharge: MULTI SENTRY is designed to work with VRLA AGM and GEL lead-acid batteries including open-vented types, in addition to Ni-Cads. Specific management features include:

• One-level recharge to meet the requirements of the most common VRLA AGM batteries
• Two voltage level recharge meeting the IU characteristic
• Restricted charging to reduce electrolyte consumption and extend the life of VRLA batteries

Temperature compensation: to avoid excessive voltage being applied to the batteries in a high ambient

Battery test: to detect performance degradation and predict battery failure. Deep discharge protection: to prevent the batteries being discharged below a level from which they cannot be recovered (especially when discharged over long periods with very low loads).

Low AC ripple current: from a high-frequency battery charger, to ensure the batteries are not subjected to this damaging element commonly experienced with some other UPS and power supply designs.

Wide input voltage range: from a rectifier that can work down to less than 40% of its nominal supply rating (at half load), removing the need to discharge the batteries.

MULTI SENTRY can be used for a wide range of applications, thanks to its configuration options, flexibility, accessories and performance levels:

• suitable for powering capacitive loads, for example Blade servers - without any reduction in active power, from 0.9 leading to 0.9 lagging
• modes of operation include: On-Line, Eco, Smart-Active and Stand-By/Off
• frequency conversion mode
• Power Share connections for priority-based load shedding when the mains power supply has failed
• cold-start facility to switch the UPS on even without a mains power supply present
• extensive back-up time options using battery extension cabinets
• optional battery cabinet temperature sensor to assist the temperature compensating charger
• optional battery chargers to optimize recharge times
• optional dual input supplies
• optional isolation transformers for Galvanic isolation and neutral connectivity

MULTI SENTRY has a large front panel graphic display providing information including: real-time measurements, operating status and alarms conditions - in eight different languages

• Advanced multiplatform communication, for all operating systems and network environments: PowerShield³ monitoring and shutdown software included with SNMP agent
• Compatible with TeleNetGuard for the remote assistance service
• RS232 or USB serial port
• Three communication slots for accessories including: network adapters and volt-free contacts
• REPO (Remote Emergency Power Off) to shut down the UPS remotely in an emergency
• Input for connection of an auxiliary contact for an external manual bypass
• Input for synchronisation with an external power source
• Graphic mimic panel display for remote connection.

The MULTI SENTRY design provides exceptional performance and efficiency levels, within a very compact footprint and overall case design:

• Lowest footprint in its category - 0.26m² for the 20kVA MULTI SENTRY with internal batteries.
• High efficiency up to 96% - saving up to 35% in dissipated energy in one year compared to a more traditional UPS (91%) resulting in a faster payback period of four years.
• High output power factor which at 0,9pF (1pF for models 160-200 kVA) provides up to 15% ( 20% for models 160-200 kVA) more active power compared to a more traditionally sized UPS - providing greater system expansion margin for further load increases.