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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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Each module monitors its battery charge current and compares it with the charge current provided by the other module. For V systems Static bypass isolator is mounted in auxiliary cubicles. Inverter will not turn ON configuration at this stage. Verify that the shipment is complete -e. In such an event the load is transferred to an unprocessed bypass supply as described later.

Reconnect the UPS input mains power. Connect one ribbon cable between sockets CN1 on one emersson and CN2 on the emerxon, and connect the second ribbon cable between the remaining CN1 and CN2 sockets.

Therefore when the first module is started the load will remain connected to its static bypass line. Once again, the voltage applied to these terminals must be generated by an external power source and not taken from the UPS internal low voltage supplies. LS6 – Load on Inverter: Your opinion is important to us.

The M Emersob manufactured before this 7400 have different serial numbers: The audible warning can be cancelled by the reset switch S5 but LS7 will only extinguish after the alarmed condition has reverted to normal. A terminal block is used for connecting the control cables to the battery circuit breaker and the external emergency stop facility.

Scheduled maintenance requirements, beyond ensuring that the environmental conditions remain suitably cool and clean, are therefore minimal.

Emerson User’s Manual |

If possible, check the battery autonomy time by opening the input isolator I1 with the UPS on-load. Pressing the reset push button cancels the audible warning but the alarm indications remain until the condition is rectified. This unit is always used in conjunction with Alarm interface PCBonly. Comments to this Manuals Your Name. The following information aims to provide a trained user with sufficient knowledge to understand the nature of a fault through the correct interpretation of the accompanying alarms and indications, and to carry out any necessary first aid repair action.


When this switch is pressed, the lower line of the LCD Display shows the battery voltage and current. Operator Control Panel 1. Table of Contents Add to my manuals Add. Under no circumstances should the UPS internal low voltage supplies be used for this purpose. When this switch is pressed, the lower line of the LCD Display shows the output phase voltage w. When shutting down the second module, the static bypass lines of both modules will be turned on as soon as its inverter is stopped.

This cable entry method allows the equipment to be positioned on a solid emersin without the need for cable trenching and also allows cables to pass from one module to the other when positioned side-by-side.

Connect one-plus-one parallel control ribbon cables between the Parallel Interface boards of both modules.


Cable connections for kVA, V, 1 Ph. Page 41 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. The battery circuit breaker will open automatically if the dc voltage falls below this level. RAM actually requires 16 such cores. Figure 19 shows the details of the power and control cable connections between the circuit breaker box and UPS itself.


When using mains-powered test equipment such as oscilloscopes in the UPS high voltage area, always use a differential mode of operation to avoid the need to disconnect the oscilloscope frame earth.

If you are unsure as to how to undertake the actions detailed – or if several LED indications are abnormal and you are unable to distinguish between the likely cause and affects – then seek immediate assistance from an approved service agent. Page of 86 Go.

When the equipment is located on a raised floor, and bottom cable entry is used, additional cooling air also enters the UPS via the floor void. Remove any packaging devices debris then visually examine the UPS and battery equipment for transit damage, both internally and externally.

If the mains power fails, the UPS continues to power the critical load from its battery source, leaving the load immune from power disturbances. LS3 ON If this led is OFF it signifies either that the bypass supply is not within acceptable tolerances or that the bypass supply isolator is open.

Emerson 7400M Series User Manual

Ensure that the UPS is totally powered down by checking for voltage at the mains input terminals, battery connection terminals, and output terminals and bypass mains input terminals in a split bypass configuration. All the user controls and indicators mentioned these in these procedures are identified in chapter 1. By rectifying the input AC power to DC power, emereon then converting it back to AC, any electrical noise present on the input mains supply line is effectively isolated from the UPS output, therefore the critical load sees only clean power.