Hardware
2016 Microchip Technology Inc.
DS50002505A-page 35
3.1.6
Board Connectors
The PFC stage board has four tab fast-on connectors, one AC inlet and one 14-pin
keyed connector for attaching a flat cable.
For the AC mains supply input, standard double-insulated, 3-core flex cable should be
used with a minimum current rating of 10A (1 mm
2
,
18 AWG). A computer power cable
can be used. The recommended cable size is 1.0 mm
2
to 1.5 mm
2
(18 AWG to 16 AWG)
and it should have a 600V rating. This cable should also be double-insulated or have
a protective ground screen.
The tab fast-on connectors, AC_N and AC_L, provide the connections to the bridge
rectifier, BR1. The recommended cable size is 18 AWG to 16 AWG or 1.0 mm
2
to
1.5 mm
2
. It is also recommended that cables used for the power connections should
be terminated with blue or red crimp terminals. If crimp terminals are not used, care
should be taken to ensure that stray strands of wire do not short to adjacent terminals
or the enclosure. If possible, all wires should be stripped and tinned with solder before
connecting to the dsPICDEM™ MCHV-3 Development Board terminals.
The fast-on connectors, PFC_OUT “+” and PFC_OUT “-”, provide DC bus voltage to
the power module stage. The recommended cable size is 18 AWG to 16 AWG or
1.0 mm
2
to 1.5 mm
2
. It is also recommended that cables used for the power connections
should be terminated with blue or red crimp terminals. If crimp terminals are not used, care
should be taken to ensure that stray strands of wire do not short to adjacent terminals or
the enclosure. If possible, all wires should be stripped and tinned with solder before
connecting to the dsPICDEM™ MCHV-3 Development Board terminals.
Note 1:
The system is designed for Installation Category II. Therefore, the
incoming mains cable should be wired into a standard non-locking, 2-pin
in addition with an earth ground-type plug.
2:
The unit is designed to be connected to the AC mains supply via a
standard non-locking plug. As the unit has no mains switch, this plug
constitutes the means of disconnection from the supply. Therefore, the
user must have unobstructed access to this plug during operation.
Note:
The user should only access the power terminals when the system is fully
discharged (see the
section on page
).