MGC300 Genset Controller User Manual
MGC300 Genset Controller Version 1.1 2020-01-04 Page 25 of 27
12
INSTALLATION
12.1
FIXING CLIPS
— The controller is panel-embedded design and the panels are fixed by clips in installation.
— Twist the fixing clip screw anticlockwise until it reaches proper position.
— Pull the fixing clip backwards (towards the back of the module), ensuring two clips are right
inside their allotted slots.
— Turn the fixing clip screws firmly clockwise until they are fixed on the panel.
NOTE:
Pay attention not to over tighten the clip screws.
12.2
OVERALL AND CUTOUT DIMENSIONS
Fig. 7 Overall and Cutout Dimensions
1) Battery Voltage Input
MGC300 controller is only suitable for DC12V battery voltage environment. Battery negative must be
connected with the engine shell soundly. The diameter of the wire which connects controller power B+/B-
and battery positive/negative must be over (or equal to) 1.5mm
2
. If floating charger is configured, please
firstly connect charger
output wires to battery’s positive and negative directly, and then connect battery’s
positive and negative and controller
power’s positive and negative individually with separated wires in
order to prevent charger disturbing th
e controller’s normal working.
2) Output and Expand Relays
All outputs are relay contactor outputs. It relay expansion is needed, please add flyback diode
( expansion relay coil has DC) to the two ends of expansion relay coils, or add resistance-capacity circuit
(when coil is AC current), and the purpose is to prevent distuibing controller or other devices.
3) AC Current Input
MGC300 controller current input must connect outside CT. CT secondary side rated current must be
62.5mA, and at the same time CT phase and input voltage phase must be correct, otherwise the current
sampling and active power may not be right.
