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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The UPS modules do not require back-access for maintenance servicing; but, where space permits, a clearance of approximately 4 feet 1. If a reverse current is detected the inverter on the affected module is immediately shut down and load transferred emerzon the bypass supply depending on the system redundancy configuration.

It also has a magnetic trip facility for overload protection. Critical load power is maintained under these conditions until the battery is fully discharged, whereupon the UPS shuts down. 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.

Step Action Response 1.

Fault Reporting Irrespective of whether fault rectification is successful or not, report the fault occurrence to the nearest service agent – who will then forward the details to the manufacturer.

Mimic and Alarm Connections Refer figure 25 and This will contain following items: Note that during this procedure the load will be unprotected against mains supply disturbances once the inverter s emeeson been switched off. Being designed to furnish a well regulated 3 phase output power supply under all rated load and input supply conditions, the system offers the user the following advantages: See the UPS specification for weight details. Shut down the UPS following the recommended operating procedure.


Free Classified ads in India. Maintenance procedures appropriate 7400mm both, valve-regulated and un-sealed batteries vary, and should be obtained from the battery manufacturer. Figure 19 shows the details of the power and control cable connections between the 7400m breaker box and UPS itself. Measure and record the battery charge current. This 24 volts supply is fmerson to be looped on interface PCB as shown with star marked connections.

Please do give us feedback to help us realise our Mission. Fitted to the UPS Logic Board, the reset switch is used by the operator to retransfer the load to the inverter following a detected overload or overtemperature fault.

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Such a condition can arise if a module develops an internal power fault or if for some reason the two modules become unbalanced, and is liable to further damage 7040m module and also degrade the load supply.

Note that if this supply is not available, RAM will not function 3. Your opinion is important to us. This type of customer feedback is an important factor in maintaining high product reliability, and also provides important data concerning the equipment field performance.

Emerson User’s Manual |

Close the input isolator immediately the DC busbar voltage falls to V note that at V the battery circuit breaker will trip and the load will transfer to bypass.

This is the normal response of the boost charge facility: This equipment electrical codes. Bypass AC Input supply present: To print the manual completely, please, download it. When this switch is pressed, the lower line of the LCD Display shows the output current. The batteries are connected to emersoj UPS through a circuit breaker which wmerson manually closed and electronically tripped via the UPS control circuitry.

Press the battery metering selector switch [B] S4. 74000m 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. Your opinion is important to us. All UPS models have a stabilising bar fitted to the output transformer T1 and input choke L1 during shipment.


In such an event the load is transferred to an unprocessed bypass supply as described later. All equipment maintenance and servicing procedures involve internal access and should be carried out only by trained personnel. USF, 24 core, 1. It is our constant endeavour to partner you for the growth and success of your business. 74000m


Start the UPS and transfer the load to the inverter following the appropriate operating procedure. Page of 86 Go. Please do give us feedback to help us realize our Mission.

The following information aims to provide a trained user with sufficient knowledge emerosn 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. Ensure that LS3 is illuminated on the mimic panels indicating that the static bypass emwrson is healthy.

It is usual in larger installations to provide an alternative UPS input power source from a stand-by generator when the mains supply fails.

Three Phase Black White Emerson 7400 M Series UPS 30Kva, Commercial

LS7 alarm should extinguish. If the above checks prove unsatisfactory then seek qualified assistance. In a domestic environment, this product may cause radio interface in which case the user may be required to take additional measures.