Muib3 - Systems With Earth Leakage Detection; System Setup Requirement; Main Features Of Muib3; Muib3 Connections - Rectifier RT9- 24V Installation, Operation And Technical Manual

Installation, Operation and Technical Manual
4.5 MUIB3 – Systems with Earth Leakage Detection
The MUIB3 has been designed to operate in conjunction with 24V, 48V and 110V rectifiers
and MCSU-4 to control and monitor these systems, while providing earth leakage current
detection. It provides basic interfacing between the MCSU-4 and the system environment.
Most of the functions available on the standard MUIB are also present in the MUIB3. The
main difference is that the LVDS circuit is replaced by an earth leakage detection circuit.
In addition, the 10 way ribbon cable header socket for connecting the single phase
monitoring module has been removed, as has the connector for the AN1 spare analogue
input since the associated analogue channel is used by the microprocessor to monitor the
earth leakage current.

4.5.1 System setup requirement

The MCSU-4 software needs to be a version with the MUIB3 option. From the front panel
of the MCSU-4 scroll down the CSU menu to a window which gives the choice of MUIB or
MUIB3. Select MUIB3 in place of the standard MUIB. The selection can be also made
from a PC running WinCSU-2 program.

4.5.2 Main features of MUIB3

The principal features of the MUIB3 are as follows:
 There is provision for battery and ambient temperature sensors.
 There is provision for two battery current transducers.
 An Earth leakage current detector enables the display of leakage current
on the MCSU-4 screen or on the remote monitor screen. Full scale is +/-
10mA.
 A window on MCSU-4 or WinCSU-2 allows the programming of the earth
leakage current level between 1.0mA and 9.5mA at which an alarm is
asserted.
 Each battery current input accepts an input range of -4V to +4V full scale.
The maximum allowed input is 5V.
 The actual number of batteries used in the system can be programmed
by the user via the MCSU-4 front panel or remotely by WinCSU-2
software.
 There are 5 relay outputs, 4 digital inputs, CB trip input and Battery
switch input.
 The MUIB3 provides power to the MCSU-4;
 One spare analog input is available (input range: 0 to +5V).

4.5.3 MUIB3 Connections

4.5.3.1 Connection to MCSU-4
One 34Way ribbon cable connects X1 on MUIB3 to the main port on the MCSU-4.
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Rectifier Technologies
19-Feb-14