Altistart ATS48 control logic for a motor with a mechanical brake

Motor Starter ATS48 doesn't have a Relay output returning information about a Motor RUN or Motor Stopping status. Thus it can't control a mechanical motor break directly and workaround is to be applied.

This is a generic example of a possible ATS 48 wiring in combination with :
Non-reversing motor connection
with a line and a bypass contactor control
freewheel or controlled motor stop,
Type 1 coordination

Relay 1 is used in the Isolating relay (rII) mode. Like one, it will control the line contactor after receiving a RUN command and will be released at the end of braking or deceleration or when the motor switches to the freewheeling mode after a STOP command. It is also deactivated when a Fault occurs.
As a motor brake shall be released at the moment or just before RUN command and engaged after full motor stop, I think you can use this relay for brake control. As the relay has one contact only, an auxiliary relay to extend number of free NO contact is necessary.

images description ATS48 wiring example

Publié pour: Schneider Electric Belgium