The 489 Generator Management Relay is a microprocessor based relay designed for the protection and management of synchronous and induction generators.The 489 is equipped with 6 output relays for tripping and alarming. Generator protection, fault diagnostics, power metering, and RTU functions are all integrated into one cost-effective package.
A one-line diagram illustrates the functions of the 489 using ANSI (American National Standard).
All features of the 489 are standard with no options.
Phase CT secondary, control power, and analog output range must be specified when ordering. There are two grounded CT inputs: one for 50:0.025 CTs and one for 1 A secondary grounded CTs
(can also be used for 5 A secondary). The VT inputs are available for VTs in delta or Wye configurations. The output relays are always non-fail-safe except for the service relay. EnerVista 489 setup software is included with each unit. A metal demo box can be ordered for demonstration or testing.
Applications:
The GE 489-P1-HI-A20-E is primarily used in the following installations:
Power plants: for the protection and management of main generators (synchronous and induction).
Cogeneration industrial facilities: to generate both electricity and heat and to ensure reliable generator operation.
Any application requiring precise protection and control of small and medium-sized generators.
The General Electric 489-P1-HI-A20-E is a General Electric Multilin 489 generator management relay. It is a sophisticated, microprocessor-based relay designed for the total protection, control, metering and monitoring of synchronous and induction generators in small to medium sized applications.
Unit Withdrawal and insertion
TURN OFF CONTROL POWER BEFORE DRAWING OUT OR RE-INSERTING THE RELAY TO PREVENT MALOPERATION!
If an attempt is made to install a unit into a non-matching case, the mechanical key will prevent full insertion of the unit. Do not apply strong force in the following step or damage may result.
To remove the unit from the case:
Open the cover by pulling the upper or lower corner of the right side,which will rotate about the hinges on the left.
Release the locking latch, located below the locking handle, by pressing upward on the latch with the tip of a screwdriver.
