Modifications reserved
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PRD_LPS_31E_8K0_20K_1GB_V021.doc
Product Description
LP 31 Series
2.4 Bypass operation
The static switch provides transfer of the load to the line voltage without any interruption of the supply.
The transfer is initiated by a signal from the output converter protection circuit in case of an overload,
high temperature or output converter failure.
When the conditions return to normal the load is automatically transferred back to the output converter.
If the output converter is unable to deliver the demanded output power (overload, overtemperature) the
bypass switch will automatically transfer the load to the mains.
If bypass operation is caused by an overload situation, the UPS will switch back to output converter if
the load is reduced to less than 100%.
If bypass operation is caused by overtemperature, the unit will only switch back when the temperature
has dropped below alarm level.
When the normal situation is restored, the load will be transferred back to the output converter.
Figure 3 - Bypass operation
If a power failure occurs during bypass operation, load power is lost.
If the UPS functions under overload conditions it may not be able to protect the load.
