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GE Multilin 489 Generator Management Relay 1-3
1 INTRODUCTION 1.1 OVERVIEW
1
1.1.2 ORDERING
All features of the 489 are standard, there are no options. The phase CT secondaries must be specified at the time of order.
The control power and analog output range must also be specified at the time of order. There are two ground CT inputs:
one for the GE Multilin HGF core balance CT and one for a ground CT with a 1 A secondary (may also be used to accom-
modate 5 A secondary). The VT inputs accommodate VTs in either a delta or wye configuration. The output relays are
always non-failsafe with the exception of the service relay. The 489PC software is provided with each unit. A metal demo
case may be ordered for demonstration or testing purposes.
For example, the 489-P1-LO-A20 code specifies a 489 Generator Management Relay with 1 A CT Inputs, 25 to 60 V DC or
20 to 48 V AC control voltage, and 4 to 20 mA Analog Outputs.
1.1.3 OTHER ACCESSORIES
Additional 489 accessories are listed below.
• 489PC software: Shipped free with 489
• DEMO: Metal carry case in which 489 unit may be mounted
• SR 19-1 PANEL: Single cutout for 19” panel
• SR 19-2 PANEL: Double cutout for 19” panel
• SCI MODULE: RS232 to RS485 converter box, designed for harsh industrial environments
• Phase CT: 50, 75, 100, 150, 200, 250, 300, 350, 400, 500, 600, 750, 1000 phase CT primaries
• HGF3, HGF5, HGF8: For sensitive ground detection on high resistance grounded systems
• 489 1 3/8” Collar: For shallow switchgear, reduces the depth of the relay by 1 3/8”
• 489 3” Collar: For shallow switchgear, reduces the depth of the relay by 3”
Table 1–3: 489 ORDER CODES
489 —
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—
489
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489 Generator Management Relay Base Unit
P1
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Current Transformer Inputs: 1 A CT Secondaries
P5
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Current Transformer Inputs: 5 A CT Secondaries
LO
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25 to 60 V DC; 20 to 48 V AC at 48 to 62 Hz
HI
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90 to 300 V DC; 70 to 265 V AC at 48 to 62 Hz
A1 0 to 1 mA Analog Outputs
A20 4 to 20 mA Analog Outputs