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6.1 Safety
The unit is designed in accordance with IEC 61010-1:2010 – Permanently connected use, Normal
condition. Installation category III, pollution degree 2, basic insulation for rated voltage.
7. Electrician.
The HT-100 DIN rail meter should only be installed by a fully qualified electrician who has
knowledge of electricity meters connected with current transformers.
It is the installer who is fully responsible for the safe installation of this meter. It must be installed
to meet the current electrical regulations concerning installation of electricity meters.
8. EMC Installation Requirements
Whilst this unit complies with all relevant EU EMC (electro-magnetic compatibility) regulations, any
additional precautions necessary to provide proper operation of this and adjacent equipment will
be installation dependent and so the following can only be general guidance: Avoid routing wiring
to this unit alongside cables and products that are, or could be, a source of interference.
The auxiliary supply to the unit should not be subject to excessive interference. In some cases, a
supply line filter may be required.
To protect the product against incorrect operation or permanent damage, surge transients must
be controlled. It is good EMC practice to suppress transients and surges at the source. The unit
has been designed to automatically recover from typical transients; however in extreme
circumstances it may be necessary to temporarily disconnect the auxiliary supply for a period of
greater than 10 seconds to restore correct operation.
Screened communication leads are recommended and may be required. These and other
connecting leads may require the fitting of RF suppression components, such as ferrite absorbers,
line filters etc., if RF fields cause problems.
It is good practice to install sensitive electronic instruments that are performing critical functions
in EMC enclosures that protect against electrical interference causing a disturbance in function.
9. Wiring Diagram
2
1
+
-
PULSE OUTPUT
4 5 6
1
M
A
100A
L
I
N
N
S
autometers.co.uk
Shield
TX-
TX+
+
When connecting the mains
cables into the meter it is good
RS485 PORT
practice to have approx 25mm in
7 8 9
a stright line entering the
terminal.
Try to ensure that the cable is
formed in such a way that the
cable wants to go into the
terminal.
UNDER NO CIRCUMSTANCES
ALLOW A SHARP BEND ON THE
CABLE ENTERING THE TERMINAL.
2
3
25mm
L
O
A
D
12
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