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GE Multilin 489 Generator Management Relay 2-3
2 INSTALLATION 2.1 MECHANICAL
2
2.1.3 INSTALLATION
The 489 case, alone or adjacent to another SR unit, can be installed in a standard 19-inch rack panel (see Figure 2–1: 489
Dimensions on page 2–1). Provision must be made for the front door to swing open without interference to, or from, adja-
cent equipment. The 489 unit is normally mounted in its case when shipped from the factory and should be removed before
mounting the case in the supporting panel. Unit withdrawal is described in the next section.
After the mounting hole in the panel has been prepared, slide the 489 case into the panel from the front. Applying firm pres-
sure on the front to ensure the front bezel fits snugly against the front of the panel, bend out the pair of retaining tabs (to a
horizontal position) from each side of the case, as shown below. The case is now securely mounted, ready for panel wiring.
Figure 2–4: BEND UP MOUNTING TABS
2.1.4 UNIT WITHDRAWAL AND INSERTION
TURN OFF CONTROL POWER BEFORE DRAWING OUT OR RE-INSERTING THE RELAY TO PREVENT MAL-
OPERATION!
To remove the unit from the case:
1. Open the cover by pulling the upper or lower corner of the right side, which will rotate about the hinges on the left.
2. Release the locking latch, located below the locking handle, by pressing upward on the latch with the tip of a screw-
driver.
Figure 2–5: PRESS LATCH TO DISENGAGE HANDLE
808704A1.CDR
CAUTION