IM-P408-04
EMM Issue 7
20
B850-W and B850-P Boiler House Energy Monitor
12.
A disconnecting device (switch or circuit breaker) must be included in the building
installation. It must:
-
Have a rating with sufficient breaking capacity.
-
Be in close proximity to the equipment, within easy reach
of the operator but not cause difficulty in operating.
-
Disconnect all phase conductors.
-
Be marked as the disconnecting device for the energy
monitor.
-
Not interrupt a protective earth conductor.
-
Not be incorporated into a mains supply cord.
-
Comply with the requirements for a disconnecting device
specified in IEC 60947-1 or UL 60947-1 (Specification for
low-voltage switchgear and controlgear - General rules)
and IEC 60947-3 or UL 60947-3 (Switches, disconnectors,
switch-disconnectors and fuse-combination units).
13.
It is important that the cable screens are connected as shown in order to comply
with the electromagnetic compatibility requirements.
14
. To keep the integrity of the IP rating, consideration must be taken when planning
the installation of the wiring between the B850 and the various sensors and
meters. It is recommended that one or more electrical junction boxes are used.
Multicore cabling can be used between junction boxes to make the installation
more efficient.