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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In a redundant module configuration the system is sized such that the potential load can be provided by just one of the two modules. These precautions should be followed implicitly at all times. Open the battery circuit breaker. Information concerning prevailing load conditions can prove useful when discussing problems with the service agent – for example, details of any particular load being started or shed at the time that the fault occurred. In general, batteries require a well ventilated, clean and dry environment at reasonable temperatures to obtain efficient battery operation.

However, a well documented periodic program of inspection and preventive maintenance, as suggested below, will help to ensure optimum equipment performance and may serve to detect certain minor malfunctions prior to them developing into a major fault. 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. 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.

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. It is usual in larger installations to provide an alternative UPS input power source from a stand-by generator when the mains supply fails. A battery can present a risk of electric shock or burn from high short circuit currents.

Under no circumstances should the UPS internal low voltage supplies be used for this purpose. Options include windows which show status information and windows which permit data to be entered, or parameters for equipment control to be set.


The cable connection details for the same are given in figures 15 — See figure 12 — Post ads for free Login Register How to partner with Clasf. The inverter synchronisation inhibit feature is most often used if the UPS is powered from a stand by generator when the input mains supply fails and the generator frequency is unstable.

In addition to the D-type connectors, the AS Interface Board also contains a number of volt-free relays whose contacts provide a duplicate set of volt-free alarm outputs that are connected to terminal block M1 -as shown in figure As a safety precaution remove the battery fuse in the module until the arrival of the emerdon engineer.

Pressing this switch turns OFF the inverter and causes the load to be transferred to the static bypass supply. Shut down the UPS following the recommended operating procedure. Ensure that LS3 is illuminated on the eemrson panels indicating that the static bypass supply is healthy.

Accept terms and conditions and privacy policy. Carry out a spot check of the operator control panel; ensuring that all mimic LED indications are normal, all metered parameters are normal and no warning or alarm messages are present on the display panel.

Input isolator is closed.

Three Phase Emerson 60 KVA Hardly Used UPS, 7400M

Figure 19 shows the details of the power and control cable connections between the circuit breaker box and UPS itself. As a safety precaution, remove the battery fuse in the UPS before making the battery circuit breaker power connections.

Measure and record the battery float charge voltage. This 24 volts supply is required to be looped on interface PCB as shown with star marked connections. Measure and record the UPS output line currents.

This green led situated near the inverter ON switch illuminates when the inverter is selected ON. Page 2 It is our constant endeavour to partner you for the growth and success of your business. Free Classified ads in India. LS4 – Inverter-output OK: When the second module is started its static bypass line is totally inhibited due to the first module being on line, and the second module will not be connected to the load until its inverter is operational and fully synchronised with the first module.


Measure and record the UPS output voltage on emerosn three phases.

Emerson User’s Manual |

The load will be transferred to the static bypass lines in both modules simultaneously as soon as the inverter stops in the first module to be shut down.

This indicates that RAM is ready for operation. This 2 pin malefemale type connector is marked as N L. Page of 86 Go. Check a b c d the following: By using Clasf, you agree to our use of cookies.

If their removal is necessary, ensure that sufficient manpower is available; otherwise use adequate mechanical handling equipment. Receive the latest offers by email. 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. If this is your first Liebert UPS, we hope it is the beginning of a long relationship which delivers value to your organisation.

The power switch locations in the various models are shown in Figure 3. Check that the bypass supply isolator is closed, the supply is available and within specifications. If you are emerskn as to how to undertake the actions detailed — Accept the terms, conditions and privacy policy to continue.