Network/Generator Application; Generator/Generator Application; Load Management With The Atc6500 - Siemens SENTRON ATC6500 Manual

Transfer switching equipment and load transfer switches 3kc transfer control device

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Applications

3.1 Transfer control

3.1.2

Network/generator application

For the network/generator application the load is normally connected to the main source

(Source 1). Following a deviation in the voltage or frequency, and after the defined delay

time, a start signal is sent to the generator (Source 2). If the generator supplies the desired

voltage, the load is transferred to the secondary source (generator) until the main source

supplies the desired supply quality.

The load is then transferred back to the main source and the generator is kept in operation

without load to allow it to cool (duration can be set by user). The ATC6500 sends a start /

stop command to the generator through a relay output and can receive digital signals from

the generator indicating its status (generator ready, OK to accept load, etc.) through

programmable inputs.

An automatic generator test can be programmed, i.e. the generator can be started at set

times to check its correct operation, even if the network is within the thresholds.

This is done by setting the execution interval, starting time, days of the week on which the

test is to be carried out, duration, etc. More information on the various setting options can be

found in chapter Parameterization (Page 155).

3.1.3

In this case two generators are controlled, each with a start-stop relay and feedback signals,

if available. In this application a rotation between generators can be programmed, i.e. the

load can be switched from one to the other at regular intervals, with the purpose of sharing

out the generator work equally.

It is also possible to set the time of day when rotation is to occur, so that the load supply is

cut off at a specified time. In case of a problem in either generator, the load is always

transferred to the one in standby mode.

3.1.4

Apart from applications with two switching devices, the ATC6500 can additionally control one

tie breaker. The ATC6500 has five predefined application settings.

The application must be selected in accordance with with the requirement in menu P02

under the parameter P02.01 (see chapter P02 – General (Page 162)).

The following applications can be implemented:

3KC ATC6500 transfer control device

Manual, 05/2019, L1V30538268002A-01

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