GE Multilin 469

QUICK REFERENCE GUIDE
469 MOTOR MANAGEMENT RELAY – QUICK REFERENCE GUIDE 43
• System frequency
• System phase sequence
• Define the Protection Elements that will be enabled. Prepare a list of protection
functions including the following information. By default, all the protection functions
must be assumed Disabled:
Pick-Up parameter
Operating curve, if applicable
Time dial or multiplier
Any additional intentional time delay
Directionality, if applicable
• Define how many output contacts will be energized in response to a given protection
function. Note that the 469 relay can be programmed to TRIP or ALARM and, at the
same time, to energize one, a combination, or both auxiliary relays during the process.
• Define if the output relays will be set as failsafe type.
• Define if the 469 will be used to start the motor. If that will be the case, gather
information on the conditions that will be used to execute the command.
• Define if the 469 will be involved in the process of starting the motor, particularly for
reduced voltage start applications.
• Define if the 469 will be applied a multi speed applications.
• Define if the relay will be used to monitor the status of the starter or breaker. It is
strongly recommended that the 469 be always programmed to monitor the status of
the disconnecting device, by means of a dry contact connected to one of the digital
inputs of the relay. Use an auxiliary contact from the breaker or starter either a
normally open contact, 52a, which is normally in open position when the
disconnecting device is open, or a normally closed contact, 52b, which is in close
position when the breaker or starter is open.
• If the relay will be used to respond to digital inputs, prepare a list of them including:
•Logic Input name.
• Condition by which the logic input would be considered asserted.
• Function that the logic input will initiate within the 469.
• If the relay will be used to perform Monitoring functions and act upon certain
conditions, gather information such as:
Minimum and maximum values
Alarm and trip values
Time delays
It is important to familiarize yourself with the relay protection and control functions before
setting up the relay.
To start, simply power on the unit, and follow the instructions in this tutorial. The example
assumes the following system characteristics. It also assumes that relay setpoints are
unaltered from their factory default values.
Refer to the following figures for schematics related to this application example.