Installation guide

A-20
Functions
and characteristics
The BA controller is used to create simple source-
changeover systems that switch from one source to
another depending on the presence of voltage UN on
the “Normal” source.
It is generally used to manage two permanent sources
and can control Compact NS and Masterpact NT/NW
circuit breakers and switch-disconnectors.
Operating modes
A four-position switch may be used to select:
automatic operation
forced operation on the “Normal” source
forced operation on the “Replacement” source
stop (both “Normal” and “Replacement” sources off).
Setting the time delays
Time delays are set on the front of the controller.
t1. delay between detection that the “Normal” source has failed and the transmission
of
the order to open the “Normal” source circuit breaker (adjustable from 0.1 to 30
seconds).
t2. delay between detection that the “Normal” source has returned and the
transmission of the order to open the “Replacement” source circuit breaker
(adjustable
from 0.1 to 240 seconds).
Circuit breaker commands and status indications
The status of the circuit breakers is indicated on the front of the controller.
ON, OFF, fault.
A built-in terminal block may be used to connect the following input/output signals:
inputs:
voluntary order to transfer to source R (e.g. for special tariffs, etc.)
additional control contact (not part of the controller). Transfer to the “Replacement”
source takes place only if the contact is closed (e.g. used to test the frequency of UR,
etc.)
outputs:
indication of operation in automatic or stop mode via changeover contacts.
Test
It is possible to test the operation of the BA controller by turning OFF (opening) the
P25M circuit breaker for the “Normal” source and thus simulating a failure of voltage
UN.
b
b
b
b
b
b
v
v
b
PB100858DB101779
Front of the BA controller.
Associated controllers
BA controller
Livre 1.indb 20 08/10/2008 18:39:02