ABB Relion 670 2.0 IEC Series, Installation Manual

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2.3 Caution signs
Whenever changes are made in the IED, measures should be taken to
avoid inadvertent tripping.
The IED contains components which are sensitive to electrostatic
discharge. ESD precautions shall always be observed prior to
touching components.
Always transport PCBs (modules) using certified conductive bags.
Do not connect live wires to the IED. Internal circuitry may be
damaged
Always use a conductive wrist strap connected to protective earth
when replacing modules. Electrostatic discharge (ESD) may damage
the module and IED circuitry.
Take care to avoid electrical shock during installation and
commissioning.
Changing the active setting group will inevitably change the IEDs
operation. Be careful and check regulations before making the
change.
Avoid touching the enclosure of the coupling capacitor REX061 unit
and the shunt resistor REX062 unit. The surface may be hot during
normal operation. The temperature can rise 50°C in REX061 and
65°C in REX062 above the ambient temperature.
1MRK514019-UEN A
Section 2
Safety information
670 series 2.0 IEC 15
Installation manual