Multi Sentry

Multi Sentry UPS are easy to install, especially on sites where there is limited power capacity available, a standby generator and potentially harmonic compatibility issues:

Multi Sentry also performs the role of a high specification filter, protecting its power supply sources (mains or generator) from any harmonics and reactive power generated by the loads it is powering.

• low input current distortion - less than 2.5%;
• high input power factor 0.99;
• power walk-in function to achieve progressive rectifier start-up;
• delayed start-up on mains power supply return.

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-Cd. Specific management features include:

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.

• 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.

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 STANDBY 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 multi-platform communication, for all operating systems and network environments: PowerShield³ monitoring and shutdown software included with SNMP agent;
• Compatible with Riello Connect (remote monitoring 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:

• 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.