The Multi Sentry series is ideal for protecting data centres and telecommunications systems, IT networks and critical systems in general, where the risks connected with poor energy supply can compromise the continuity of activities and services. The Multi Sentry series is available in 10-12-15-20 kVA models with threephase/ single-phase input and single-phase output, and 10-12-15-20 kVA models with three-phase input and output and on-line double conversion technology in accordance with VFI-SS-111 classification (as set out in standard IEC EN 62040-3). Multi Sentry is designed and built using state-of-the-art technology and components. It is controlled by a DSP (Digital Signal Processor)microprocessor, to provide maximum protection to the powered loads with no
impact on downstream systems, and optimised energy savings.

ZERO IMPACT SOURCE
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:

• low input current distortion – less than 3%
• high input power factor 0.99
• power walk-in function to achieve progressive rectifier start-up
• delayed start-up on mains power supply return

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.

BATTERY CARE SYSTEM
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.

SERIES TABLE

Model Rated  Power (kVA) Nominal Voltage – Input (V) Nominal Voltage – Output  (V) Number of phases – Output
MCM/MSM 10 BAT 10 380-400-415 Vac three-phase + N / 220-230-240 Vac single-phase + N 220-230-240 Vac single-phase + N (selectable) 1
 MCM/MSM 12 BAT 12 380-400-415 Vac three-phase + N / 220-230-240 Vac single-phase + N 220-230-240 Vac single-phase + N (selectable) 1
MCM/MSM 15 BAT 15 380-400-415 Vac three-phase + N / 220-230-240 Vac single-phase + N 220-230-240 Vac single-phase + N (selectable) 1
MCM/MSM 20 BAT 20 380-400-415 Vac three-phase + N / 220-230-240 Vac single-phase + N 220-230-240 Vac single-phase + N (selectable) 1
MCT/MST 10 BAT 10 380-400-415 Vac three-
MCT/MST 12 BAT 12 380-400-415 Vac three-phase + N 380-400-415 Vac three-phase + N (selectable) 3 + N
MCT/MST 15 BAT 15 380-400-415 Vac three-phase + N 380-400-415 Vac three-phase + N (selectable) 3 + N
MCT/MST 20 BAT 20 380-400-415 Vac three-phase + N 380-400-415 Vac three-phase + N (selectable) 3 + N
BAT Also available with internal batteries

SPECIFICATIONS TABLE

INPUT
Frequency 50/60 Hz
Frequency tolerance 40 – 72 Hz
Power factor at full load > 0.99
Current distorsion thdi ≤ 3%
BY PASS
Voltage tolerance 180 – 264 V (selectable)
Nominal Frequency 50 or 60 Hz (selectable)
Frequency tolerance ±5 (selectable)
Bypass Overload 125% for 60 minutes, 150% for 10 minute
OUTPUT
Power factor 0.9
Frequency Can be selected: 50 Hz or 60 Hz or self-learning
Static variation ± 1%
Dynamic variation ± 3%
Waveform Sinusoidal
Current crest factor 3 : 1 Ipeak/Irms
Frequency stability during battery
operation
0,01%
BATTERIES
Type VRLA AGM/GEL/NiCd/Li-ion/Supercaps
Typical recharge time 6 hours
ENVIRONMENTAL
Color Dark grey RAL 7016
Communication  3 slots for communications interface / USB / RS232
Safety compliance IEC EN 62040-1; EMC IEC EN 62040-2 C2
EMC conformance EMC 2004/108/CE electromagnetic compatibility Directive
Protection rating IP20
Smart Active efficiency up to 99%
Operating temperature 0°C / +40°C
Relative humidity < 90% not condensed
Dimensions (WxDxH) (mm) 320 x 840 x 930 (MCM/MCT version) / 440 x 850 x 1320 (MSM/MST version)

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