Cooper Lighting Low Impedance Bus Differential Relay M-LIB3 - Manual (Page 11)

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3 APPARATUS CONFIGURATION
The M-LIB3 modular protection apparatus is combined according to the configuration of the protected bus
bar System.
Generally the following components are needed :
q One M-LID3 differential relay for each of the protected bus bar zone.
q One M-LID3 differential relay for each Check Zone (normally one only).
The M-LID3 relays can be supplied as individual flush mounting units or combined in 19” 3U rack panel.
Each rack panel can store up to four M-LID3 draw-out relays or can house M-LID3 relays combined with
any other Edison relay, such as lock-out relay RB4, communication protocol converter module MC-R,
Control Matrix MX7-5, Breaker Failure relay BF20, et cetera.
q One plug-in module M-BF3 for each incoming / outgoing Feeder connected to the Busbar system.
q One plug-in module M-BC3 for each Bus Coupler or sectionalizer.
The M-BF3 and the M-BC3 modules are housed in the F/C Rack Panels.
One F/C Rack Panel can house up to seven M-BF3 or M-BC3 modules (example 6 M-BF3 + 1 M-BC3)
If more than seven modules are needed additional F/C panels shall be provided.
The F/C panels include the bus wiring for two Busbar Zones plus one Check Zone: one (or one group of)
F/C panels is needed for each pair of Busbar Zones.
Interface between each F/C group and the relevant Differential protection relays is made by a single
connector cable type C1F.
Interconnection between n F/C panels of one group is made by n-1 double connector cables type CFM