Single Phase Ac Monitoring Module - Mmib4; Three Phase Ac Monitoring Module - Mmib2 - Rectifier RT9- 24V Installation, Operation And Technical Manual

Installation, Operation and Technical Manual
4.6 Single Phase AC Monitoring Module – MMIB4
In low power systems where single phase power only is supplied, an optional single phase
monitoring module can be used to monitor the incoming AC voltage, current and
frequency. The module is connected between the incoming supply and the AC Distribution
module and connects to the MUIB/MicroCSU via a 16-way ribbon cable, which can be
"daisy-chained" to other auxiliary modules. A connector and jumper link is available to
allow for connection of an external CT if the on-board CT is not used.
The connection diagram of the MMIB4 module is shown below in Figure 4.6. The standard
unit has a CT full scale rating of 100Arms (for 5V input to MiniCSU), and a full scale
voltage sense rating of 300Vrms (active-neutral). Higher or lower full scale current ratings
can be used as the external CT, with a corresponding value being set in the
MiniCSU/MicroCSU AC monitoring menu.
To AC distribution
AC Voltage Sensing
Figure 4.6 Single Phase AC monitoring unit MMIB4 block diagram
4.7 Three Phase AC Monitoring Module – MMIB2
For large power systems where the rectifiers are balanced over all three phases, an
optional three phase monitoring module (MMIB2) can be used to measure the AC supply
phase-neutral voltages, phase currents and supply frequency.
directly to the auxiliary port at the rear of the MiniCSU/MicroCSU or at the end of a "daisy-
chain" of auxiliary port connections and does not use any connections on the MUIB.
The module is normally fitted inside the AC distribution module if one is used.
connection diagram of the MMIB2 is shown in Figure 4.7 below. The full scale current
value of the CTs is 100Arms for a single turn on the standard unit. Higher full scale
currents can be obtained by cascading larger external CTs through the on-board CTs and
modifying the full scale value in the Mini/MicroCSU mains monitoring menu. The rated
maximum sense voltage is 300V (line-neutral) due to the terminal rating and accuracy of
the voltage sensing transformer.
158-1872-01
External CT
X6
CT
Active
X137
Neutral
Selector Link
X21
26
Rectifier Technologies
16 way ribbons to MCSU
and auxilary modules
X51
X87
The MMIB2 connects
A
19-Feb-14