GE 469 User Manual

CHAPTER 1: GETTING STARTED
469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL 1–35
CURRENT UNBALANCE ALARM: “Unlatched”
ASSIGN ALARM RELAYS: “Alarm”
CURRENT UNBALANCE ALARM PICKUP: “10%”
CURRENT UNBALANCE ALARM DELAY: “10 s”
CURRENT UNBALANCE ALARM EVENTS: “On”
CURRENT UNBALANCE TRIP: “Latched” – the output relay will remind energized until the
Reset command executed
ASSIGN TRIP RELAYS: “Trip”
CURRENT UNBALANCE TRIP PICKUP: “20%”
CURRENT UNBALANCE TRIP DELAY: “5 s”
1.4.8 S7 Motor Starting
The S7 Motor Starting settings page contains additional settings used to complement the
Thermal Model. In our example, these characteristics are specified under Motor Protection
heading.
For the Acceleration Timer element, enter the following values in the
S7 MOTOR STARTING Z
ACCELERATION TIMER page. Press the MESSAGE T key after each settings is completed to
move to the next message.
ACCELERATION TIMER TRIP: “Latched”
ASSIGN TRIP RELAYS: “Trip”
ACCELERATION TIMER FROM START: “13 s” – as shown in the acceleration curves at
100% voltage
For the Start Inhibit element, enter the following values in the
S7 MOTOR STARTING ZV
START INHIBIT page. Press the MESSAGE T key after each settings is completed to move
to the next message.
START INHIBIT BLOCK: “On”
TC USED MARGIN: “25%”
With these settings, the 469 relay prevents motor starting if there is insufficient thermal
capacity for a successful motor start. Refer to Start Inhibit on page 5–66 for additional
information.
There is not information available to set Starts/Hour, Time Between Starts, or the Restart
Block features. Therefore, the following settings must be disabled:
JOGGING BLOCK: “Off”
RESTART BLOCK: “Off”
1.4.9 S8 RTD Temperature
The S8 RTD Temperature page contains the settings for the twelve (12) field programmable
RTDs that are normally used for temperature monitoring. The temperature measured by
each RTD can be compared to pickup values, and set to energize Trip or Alarm outputs.
For proper temperature monitoring, enter the RTD types in the
S8 RTD TEMPERTURE Z RTD
TYPES
page. Press the MESSAGE T key after each settings is completed to move to the
next message.

GE 469 Specifications

General

Brand	GE
Model	469
Category	Relays
Language	English