Liebert Series Uninterruptible Power System (UPS) for the Single Module The Series UPS has been designed for Commercial/Industrial use only. Single Phase UPS system S i n g l e m o d u l e a n d ‘1 + N’ (e x p a n d a b l e) UNINTERRUPTIBLEPOWERSYSTEM User Manual EMERSON Network Power. Single phase ups system • Read online or download PDF • Emerson User Manual.

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If a non-redundant mode is selected the two static switch sections are effectively locked together in that both the static switches are turned off or on by a single control signal.

In a Non-Redundant module system both modules must be running before the load is transferred to their paralleled inverters.

If this type of battery is used in your installation you may notice 7400mm the battery charger voltage will be greater than its nominal Vdc when the mains supply returns from a prolonged outage.

Recondition Emerson Online UPS, Model No.: 7400M

Close the Maintenance Isolator on both modules. It is our constant endeavour to partner you for the growth and success of your business. These o o o o o options are: Differences are shown below. The battery circuit breaker will open automatically if the dc voltage falls below this level. Verify that the UPS room satisfies the environmental conditions stipulated in the equipment specification, paying particular attention to the ambient temperature and air exchange system.

Pressing this switch activates the inverter and causes the load to be transferred to the inverter side of the static switch after the inverter voltage has had time to stabilise. Do not switch OFF the inverter when this alarm is active or the load will experience a millisecond power break. Chapter 4- Optional Equipment 4. When using the above contacts for remote alarm annuciation, the power supply for the remote indicators must be provided from an external power source.

Switch S4 B – Battery: Check a b c d the following: Input filter In addition to these options, it is possible for the customer to use an RS extension of the operator control panel fitted as standard for external indications. However, it is important to maintain a regular record of the UPS meter indications, as suggested in the maintenance instructions, in order that any change in the system or load characteristics are readily identified.


Due to the fact that the UPS power supplies are fed by the input circuit breaker, this message will disappear if the input isolator is opened and bypass isolator opened on a split bypass system while the load is on maintenance bypass supply. Magnetic components – Check for signs of overheating, security of fixture and signs of delamination. A battery can present a risk of electric shock or burn from high short circus currents.

Chapter 6 -troubleshooting Chapter 6 -Troubleshooting Troubleshooting UPS Systems The UPS contains complex electronic control circuits that require a firm understanding in order to carry out comprehensive fault diagnosis and repair of the equipment.

In general, batteries require a well ventilated, clean and dry environment at reasonable temperatures to obtain efficient battery operation. When starting a redundant module system the load is transferred from the bypass to the inverter of the first module as soon as the first module is started and its inverter is brought on line.

Pressing the reset push button cancels the audible warning but the emersson indications remain until the condition is rectified. This is located inside the battery cabinet if used or is otherwise located adjacent to the battery racks Mimic panel LED LS2 should illuminate and LS7 alarm should extinguish. A DIP switch fitted to the display microprocessor board enables the displayed language to be easily selected to English, French, Italian, Spanish or German.

The battery not available indicator 4 will light amber and the battery bar graph LED’s will all extinguish.

Liebert – Emerson Series Ups System – Energetic Sales & Services, Dehradun | ID:

Emersoj manufacturer offers customer training, at a nominal fee, if required. This means that although it is not impossible to modify an existing module to form part of a one-plus-one system it is not a straightforward proposition.

Control switches Seven tactile switches are located on the Operator Panel, together with an emergency stop push button which is fitted with a safety cover to prevent inadvertent operation. Switch S3 Io – Output current: UPS using the most direct route possible Emerson Network Power offer a purpose-designed remote battery circuit breaker box, containing the circuit breaker and its necessary control board, as a standard option kit.


This manual does not provide servicing instructions and the options accessed from these windows are therefore not shown on the menu map in figure 1- 7. In all cases, the message automatically resets when the alarmed or warning condition reverts to normal.

Because every site has its peculiarities, it is not the aim of this eerson to provide step-by-step installation instructions, but to act as guide as to the general procedures and practices that should be observed by the installing engineer. The supply is rated to approximately 10 watts and hence can be tapped from any suitable source. Listen for any noticeable change in audible noise.

We therefore strongly recommend that the annual service is carried out by trained personnel. This entails working inside the equipment in regions containing fmerson voltages. Shut down the UPS following the recommended operating procedure.

The alarm led and messages will remain active if a detected fault condition is still present. This circuit breaker is closed manually, but it contains an undervoltage release coil which enables it to be tripped from the UPS control electronics following certain detects for faults. As the outputs from both UPS modules are connected together to provide a single load supply, it is imperative that the inverters are fully synchronised both in frequency and phase.

When this switch is pressed, the lower line of the LCD Display shows the output phase voltage w.

RAM actually requires 16 such cores. Use one connector only -i. The UPS modules do not require back-access for maintenance servicing; but, where space permits, a clearance of approximately 4 feet 1.