ferroamp EnergyHub Wall 14 kW, Руководство по установке

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2.6 Current transformers (CT) – connection
and placement
•
Route the cables from the current transformers through
the cable entry, the length of the cable is 10 m.
NOTERA! To extend the cable, you need to use a twisted pair cable.
The total loop resistance must be below 10 Ohms. See the table
below for the ratio of conductor area to maximum cable length
between the current transformers and the EnergyHub.
Conductorarea
(mm²)
Max length (m)
0.16 46
0.25 72
0.50 145
0.75 218
1.0 290
1.5 436
•
Connect the CT cable to the CT connector as shown in the
following figure. From left to right; white, red, blue, black,
yellow and green.
•
Ensure connection and any cable extension is correct by
measuring the resistance between the pairs (red/white,
black/blue, green/yellow). All pairs should show similar
resistance when properly installed.
•
Attach the contact housing. Make sure that the strain relief in
the contact housing attaches around the insulation of the CT
cable.
•
The current transformers (CT) must be placed on the incoming
AC cable of the building. A clamp around each phase, L1, L2
and L3. The order and direction of the current transformers
does not matter as this is detected automatically. The
important thing is that each phase has a current transformer
around it. They must be placed between ( B ) and ( C ). See the
figure below
A. Main fuse
B. Electricity meter
C. Distribution cabinet)
D. EnergyHub-system
E. One and three phase loads
NOTE! The current transformers do NOT sit between (C) and ( D )
or between ( C ) and ( E ).
•
Be careful when the current transformers are mounted
around the cable, it is important that the clamp closes
properly, it should not be possible to loosen them without
lifting the unloading latch.
2.7 Ethernet-connection
To enable reporting of measurement data and updating of software
in EnergyHub, a working connection to the Internet via Ethernet is
required.
The following requirements apply to the internet connection:
1. IPv4 address as well as working DNS server and NTP
server are assigned by using DHCP.
•
Outbound traffic to the internet must work flawlessly.
Information about specific ports and more details can be
found on www.ferroamp.com in the knowledge base.
.