ABB REL300 Instruction Manual page 98

Section 4. INSTALLATION, OPERATION AND MAINTENANCE
Check jumper #3 on the Microprocessor module for phase rotation ABC
or ACB. Remove jumper#3 for system ABC rotation connect Jumper #3
for ACB system.
4.1 SEPARATING THE INNER AND OUTERCHASSIS
It is recommended that the user of this equipment become acquainted with the information in
these instructions before energizing the REL300 and associated assemblies. Failure to ob-
serve this precaution may result in damage to the equipment.
All integrated circuits used on the modules are sensitive to and can be damaged by the dis-
charge of static electricity. Electrostatic discharge precautions should be observed when oper-
ating or testing the REL300.
Use the following procedure when separating the inner chassis from the
outer chassis; failure to observe this precaution can cause personal in-
jury, undesired tripping of outputs and component damage.
a. Unscrew the front panel screw.
b. If the REL300 does not have FT-14 switches, but has a power switch on the front panel,
turn "OFF" the power switch before sliding out the inner chassis.
c. If the REL300 has FT-14 switches:
1) Remove the FT-14 covers (one on each side of the REL300).
2) Open all FT-14 switches.
Do Not Touch any FT-14 switch; they may be energized.
!
WARNING
!
CAUTION
!
WARNING
I.L. 40-385.7
4-1