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Control wiring should be segregated from all power wiring. To comply with the
radiated emissions requirements of EN50081-1 the product must be inside a suitable
control cubicle and the control cables must be screened outside of the cubicle.
Connect the screen to earth at the 601 end only (see figure 4.3). Note the cubicle
must provide 15dB attenuation to radiated emissions between 30 and 100MHz to
meet the residential limits.
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To meet the generic EMC Standards and minimise the electrical interference,
connections between the Inverter and the motor must be made using screened cable.
The screens must be connected to the motor frame and to the motor cable clamp
(PE). The motor protective earth conductor should be connected at the drive end to
the motor PE point. Where it is necessary to interrupt the screened cable for
connection to circuit breakers or other devices, the screens should be connected over
the shortest distance possible.
The motor cables should be segregated from all other wiring and should not be run in
the same conduit/trunking as supply or control wiring. The recommended method for
terminating the screen on screened motor cables is shown on the following figure.
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Remove terminal cover (figure 1.1). For typical power connections refer to figure 4.3.
Eurotherm Drives do not recommend the use of RCDs. If local regulations dictate
their use, RCDs which function with DC components of earth leakage current (Type
B as defined in IEC 755/A2) RCDs are only acceptable, otherwise all loads requiring
protection with the RCD will be at risk. Filtered 601s must be permanently earthed
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