REF542PLUS_IC_1VTA100004_ENA

　　Mounting and Installation

　　In this chapter you will find information:

　　on what to do first on delivery of the REF542plus the requirements for the installation location and the environmental conditions how to set up the REF542plus and integrate it into the bay and how to check the wiring to run the commissioning process.

　　Unpacking

　　The REF542 bay control and protection unit does not require special shipping protec-tion. The packaging is adapted for the shipping type and destination.

　　Please proceedas follows:

　　Visually inspect the unit and the packaging when unpacking it.Any shipping damage found in the packaging or the unit should be reported immedi-ately to the last shipper, who should be informed in writing of liability for the damage.Check the delivery for completeness using the order documentation.If there is anything missing or any discrepancies with the order documentation, con-tact the ABB sales office immediately.Mount the unit as described in the following section. If the unit is not for immediate use, store it in a suitable place in its original packaging.

　　Mounting

　　The REF542 plus consists of two parts, a Central Unit and a separate Human Ma chine Interface (HMI) as the Control Unit. The Central Unit contains the power supply,processor and analog and binary Input and Output (I/O) modules, as well as optional modules for supplementary functions. The HMI Control Unit is a stand-alone unit with its own power supply. It can be installed on the Low Voltage (LV) compartment door or in a dedicated compartment close to the Central Unit. The HMI is normally used toset the protection parameters and to locally operate the switching devices in the switchbay. An isolated and shielded twisted pair according to the RS485 standard in terface shall be used for the connection of the HMI as the Control unit to the Central Unit.

　　Set-up Area and Required Environmental Conditions

　　Please note the following information regarding the set-up area:

　　Allow sufficient space for access to the. The connections must be easily accessible.

　　Access to the Central Unit in the LV compartment must be easy for the following rea-sons:

　　to replace the unit,

　　to expand the unit,

　　to replace specific electronic equipment boards and

　　to replace specific modules if necessary.

　　Because the unit is sensitive to non-permitted severe environmental conditions,

　　please observe the following:

　　The set-up area must be free of excessive air contamination (dust, aggressive sub- stances…).

　　The natural air circulation around the unit must be free.

　　The set-up area must maintain the specified environmental conditions

REF542plus_ic_1VTA100004_ENa.pdf

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