Cooper Lighting Low Impedance Bus Differential Relay M-LIB3 - Manual (Page 7)

S150-34-1
7
2.4 F/C Rack Panel
19” 3U rack panel suitable to house up to seven plug-in modules type M-BF3 or M-BC3 including
back printed circuit board with :
q Diodes for supply of the measurement bus of two Main Zones and one Check Zone
q 7 Female sockets for plug-in connection of the M-BF3 or M-BC3 modules.
q 7 Terminal boards with screw terminals for connection to the system.
q 1 Male connector socket for interfacing with the differential protection relays.
q 1 Female connector socket for interconnection with other F/C Rack Panels.
q 1 Power supply module:
The auxiliary power is supplied by a built-in interchangeable module fully isolated and self
protected. Two options are available
:
24V(-20%) / 110V(+15%) a.c. 80V(-20%) / 220V(+15%) a.c.
a) -

b) -

24V(-20%) / 125V(+20%) d.c. 90V(-20%) / 250V(+20%) d.c.
Before energizing the unit check that supply voltage is within the allowed limits.
Power consumption : nx 4W (n = number of modules M-BF3)
The unit can supply up to 12 modules M-BF3 plus two modules M-BC3 (one unit can supply two F/C Rack
Panels).