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RF emissions (CISPR 11)

Class A

The ZWT is suitable for use in all establishments other than 
domestic and those directly connected to the public low-voltage 
power supply network that supplies buildings used for domestic 
purposes.

Harmonic emissions (IEC 61000-3-2)

Class A

Voltage fl uctuations / fl icker emissions (IEC 61000-3-3)

Complies

Table 2: Guidance and manufacturer’s declaration — electromagnetic immunity and environment

The ZWT is intended for use in the electromagnetic environment specifi ed below. The customer or the user of the ZWT should ensure that it is used 
in such an environment.

Electrostatic discharge (ESD) 
(IEC 61000-4-2)

±6 kV contact
±8 kV air

±6 kV contact
±8 kV air

Floors should be wood, concrete, or ceramic tile. 
If fl oors are covered with synthetic material, the 
relative humidity should be at least 30%.

Electrical fast transient / 
burst  (IEC 61000-4-4)

±2 kV for power-supply lines
±1 kV for input/output lines

±2 kV for power-supply lines
±1 kV for input/output lines

Mains power quality should be that of a typical 
commercial or hospital environment.

Surge (IEC 61000-4-5)

±1 kV line(s) to line(s)
±2 kV line(s) to earth

±1 kV diff erential mode
±2 kV common mode

Mains power quality should be that of a typical 
commercial or hospital environment.

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