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KESS Power Solutions Gmbh / www.kess.at / info@kess.at
4.5 oPTioNAL SUPPLiES
isolation transformator
The isolation transformer provides galvanic isolation in order to completely
isolate the output from the input and/or change neutral mode. The placement
of an electrostatic screen between the primary and secondary windings of the
transformer provides a high level of electrical noise attenuation.
The isolation transformer can be physically placed at the input or output of the
UPS depending on the technical conditions of the whole system (device supply
voltage and/or load voltage, characteristics or their type, etc.).
in parallel systems, it is not possible to operate with independent transformers
for each UPS. in contrary, it is necessary to have a single common element for
the total adequate power. in any event, it will always be supplied as a
peripheral component external to the device itself in a separate box.
External maintenance bypass
The purpose of this option is to electrically isolate the device from the mains
and the critical loads without cutting the power to the latter. in this way,
maintenance or repair operations on the device can be carried out without
interruptions to the power supply of the protected system, while preventing
unnecessary hazards for the technical personnel.
communication card
The UPS features a slot at the rear for inserting one of the following
communication cards:
•
integration using an SnMP-adapter:
Large computer systems based on LANs
and wANs that integrate servers in different operating systems must provide
the system manager with ease of control and administration. This facility is
obtained through an SNMP adapter. while the connection betwenn UPS
and SNMP is internal, the connection of the SNMP is made through a RJ45-10
base connector.
•
Relay interface card:
The UPS has an optional interface for relaycards
that provides digital signals in the form of potential-free contacts, with a
maximum applicable voltage and current of 240 V AC or 30 V dC and 1A. This
communication port enables a dialogue between the device and other
devices through the relays supplied in the terminal block (arranged on the
same card), with a single common terminal for all of them. from the factory, all
contacts are „normally open“ and can be changed one by one, as explained
in the information concerning the optional supplies. Please contact our KESS
Service for further information.