3 Specifications
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The connecting wire, connecting the device to the outside circuit, should be sized in accordance with local
regulations for the maximum amount of the current breaker or other overcurrent protection devices used in the circuit.
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An external switch or a circuit-breaker should be installed on the supply wires, which will be used to disconnect the
meter and the device supplying energy. It is recommended that this switch or circuit-breaker is placed near the meter
because that is more convenient for the operator. The switch or circuit-breaker should comply with the specifications of
the building’s electrical design and all local regulations.
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An external fuse or thermal cut-off used as an overcurrent protection device for the meter must be installed on the
supply side wires. It’s recommended that this protection device is also placed near the meter for the convenience of the
operator. The overcurrent protection device should comply with the specifications of the building’s electrical design and
all local regulations.
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The meter is intended to be installed in a Mechanical Environment ‘M1’, with Shock and Vibrations of low significance
and Electromagnetic Environment ‘E2’, as per 2014/32/EC Directive. The meter shall be installed inside a suitable IP rated
enclosure, in accordance with local codes and regulations.
•
To prevent tampering, an enclosure with a lock or a similar device can be used.
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The meter has to be installed against a fire resistant wall.
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The meter has to be installed in a well-ventilated and dry place.
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The meter has to be installed in a protective box if the meter is exposed to dust or other contaminants.
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The meter can be installed and used after being tested and can be sealed afterwards.
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The device can be installed on a 35mm DIN rail.
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The meter should be installed on a location where the meter can be read easily.
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In case the meter is installed in an area with frequent surges for example due to thunderstorms, welding
machines, inverters etc., the meter is required to be protected with a Surge Protection Device.
•
The device should be sealed immediately after installing it in order to prevent tampering.
4 Installation
NOARK Ex9EMS 1P 2M - 5
Caution
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Turn off and if possible lock all sources supplying the energy meter and the equipment that is connected to it before
working on it.
•
Always use a properly rated voltage sensing device to confirm that power is off.
Warning
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The installation should be performed by qualified personnel familiar with applicable codes and regulations.
•
Use insulated tools to install the device.
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A fuse, thermal cut-off or single-pole circuit breaker should be fitted on the supply line and not on the neutral line.
