CHAPTER 4: SETPOINTS SYSTEM
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 4–77
Switching Device
The 869 supports two types of motor switching devices: breakers and contactors. A
breaker operation is controlled by two coils labeled “Trip” and “Close”. Each of them has to
be separately energized with a short pulse in order to change the state of the breaker. A
contactor operation is controlled by a single coil. When the coil is energized, the main
contacts are closed and when the coil is de-energized, the main contacts are open.
The user has to select either “Breaker” or “Contactor” and the selection has to match the
actu
al device type used. The selection is made in Setpoints > System > Motor > Switching
Device Type.
Depending upon the selection in Set
points > System > Motor > Switching Device Type,
one of two items appears on the menu. If the selection is Breaker the menu shows the
following.
Path:
Setpoints > System > Breakers > Breaker 1
FAST PATH:
The above menu is hidden if the Switching device type selection is “Contactor”.
If the selection in Setpoints > System > Motor > Switching Device Type is Contactor the
menu shows the following:
Path:
Setpoints > System > Contactor > Contactor 1
FAST PATH:
The above menu is hidden if the Switching device type selection is “Breaker”.
NAME
Range: Up to 13 alphanumeric characters
Default: BKR 1 (Contactor 1)
This setting allows the user to enter a breaker or contactor name. It can be any
alphanumeric character combination up to 13 characters long.
CONTACT INPUT 52a
Range: Off, Any Contact Input
Default: Off
Select the contact input connected to the breaker or contactor auxiliary contact 52a.
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