GE L60, Instruction Manual, Page: 46 / 498

3-4 L60 Line Phase Comparison Relay GE Multilin
3.1 DESCRIPTION 3 HARDWARE
3
3.1.2 MODULE WITHDRAWAL AND INSERTION
Module withdrawal and insertion may only be performed when control power has been removed from the
unit. Inserting an incorrect module type into a slot may result in personal injury, damage to the unit or con-
nected equipment, or undesired operation!
Proper electrostatic discharge protection (i.e. a static strap) must be used when coming in contact with
modules while the relay is energized!
The relay, being modular in design, allows for the withdrawal and insertion of modules. Modules must only be replaced with
like modules in their original factory configured slots. The faceplate can be opened to the left, once the sliding latch on the
right side has been pushed up, as shown below. This allows for easy accessibility of the modules for withdrawal.
Figure 3–5: UR MODULE WITHDRAWAL/INSERTION
• MODULE WITHDRAWAL: The ejector/inserter clips, located at the top and bottom of each module, must be pulled
simultaneously to release the module for removal. Before performing this action, control power must be removed
from the relay . Record the original location of the module to ensure that the same or replacement module is inserted
into the correct slot. Modules with current input provide automatic shorting of external CT circuits.
• MODULE INSERTION: Ensure that the correct module type is inserted into the correct slot position. The ejector/
inserter clips located at the top and at the bottom of each module must be in the disengaged position as the module is
smoothly inserted into the slot. Once the clips have cleared the raised edge of the chassis, engage the clips simulta-
neously. When the clips have locked into position, the module will be fully inserted.
All CPU modules except the 9E are equipped with 10Base-T or 10Base-F Ethernet connectors. These connectors
must be individually disconnected from the module before it can be removed from the chassis.
The version 4.0 release of the L60 relay includes new hardware (CPU and CT/VT modules). The new CPU mod-
ules are specified with the following order codes: 9E, 9G, 9H, 9J, 9K, 9L, 9M, 9N, 9P, 9R. The new CT/VT modules
are specified with the following order codes: 8F, 8P.
The new CT/VT modules (8F, 8P) can only be used with new CPUs (9E, 9G, 9H, 9J, 9K, 9L, 9M, 9N, 9P, 9R); simi-
larly, old CT/VT modules (8A, 8C) can only be used with old CPUs (9A, 9C, 9D). To prevent hardware mismatches,
the new modules have blue labels and a warning sticker stating
“Attn.: Ensure CPU and DSP module label col-
ors are the same!” . In the event that there is a mismatch between the CPU and CT/VT module, the relay will not
function and a
DSP ERROR
or
HARDWARE MISMATCH
error will be displayed.
All other input/output modules are compatible with the new hardware. Firmware versions 4.0x and higher are only
compatible with the new CPU and CT/VT modules. Previous versions of the firmware (3.4x and earlier) are only
compatible with the older CPU and CT/VT modules.
WARNING
WARNING
NOTE
NOTE