Vertiv
™
|Liebert
®
MBSM
™
User Manual | 2
NOTICE
Overvoltage Protection: The Liebert MBSM must be protected against overvoltages deriving from input
utility supply. The device was developed in accordance with the product normative IEC EN 62040-2,
which relates to the IEC 1000-4-5. Overvoltages must be planned for in the power supply system,
including those caused by lightning strikes and those produced internally as the result of switching
inductive or capacitive loads, such as power transformers or capacitor banks, or as the result of short-
circuit shutdowns.
In addition to the warnings, cautions and notices in this document, pay particular attention to the
following:
• When selecting a location for the device and before operation, observe the notices concerning
environmental conditions.
• When disconnecting input power, the connected loads continue to be supplied with voltage by the battery,
and return voltage is present at the input terminals of the UPS.
• Data transfer cables must not be connected or disconnected during thunderstorms.
• Ensure that no objects (e.g., metal shavings, screws, etc.) are left inside of the device.
WARNING
Risk of electric shock. Can cause property damage, injury and death.
When the Liebert MBSM is closed, parts that carry voltage must not be touched. After
removing the protective panels or terminal field covering, the connection terminals and
rails, as well as exposed metal parts and other components carrying dangerous voltages
are no longer protected against accidental contact.
Safety measures must be observed when working on an open UPS or accessory.
WARNING
Risk of electric shock. Can cause equipment damage, injury and death.
The area around the Liebert MBSM must be kept free of puddles of water, excess moisture
and debris.
This equipment contains circuits that are energized with high voltage. Only test equipment
designed for troubleshooting should be used. This is particularly true for oscilloscopes.
Always check with an AC and DC voltmeter to ensure safety before making contact or
using tools. Even when the power is turned Off, dangerously high potential electric charges
may exist in the Liebert MBSM.
All power and control wiring must be installed by a properly trained and qualified
electrician. All power and control wiring must comply with the NEC and applicable local
codes.
When performing maintenance with any part of the equipment under power, service
personnel and test equipment must be standing on rubber mats. The service personnel
must wear insulating shoes for isolation from direct contact with the floor (earth ground).
One person should never work alone, even if all power is disconnected from the equipment.
A second person should be nearby to assist and to summon help in case of an accident.
NOTE
Materials sold hereunder cannot be used in the patient vicinity (e.g., use where UL, cUL or IEC
60601-1 is required). Medical applications such as invasive procedures and electrical life support
equipment are subject to additional terms and conditions.
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