Caution Signs - ABB Relion 670 series Operation Manual

Section 2
Safety information
2.3

Caution signs

12
Never connect or disconnect a wire and/or a connector to or from a IED during
normal operation. Hazardous voltages and currents are present that may be
lethal. Operation may be disrupted and IED and measuring circuitry may be
damaged.
Dangerous voltages can occur on the connectors, even though the auxiliary
voltage has been disconnected.
Always connect the IED to protective earth, regardless of the operating
conditions. This also applies to special occasions such as bench testing,
demonstrations and off-site configuration. This is class 1 equipment that shall
be earthed.
Never disconnect the secondary connection of current transformer circuit
without short-circuiting the transformer's secondary winding. Operating a
current transformer with the secondary winding open will cause a massive
potential build-up that may damage the transformer and may cause injuries to
humans.
Never remove any screw from a powered IED or from a IED connected to
powered circuitry. Potentially lethal voltages and currents are present.
Take adequate measures to protect the eyes. Never look into the laser beam.
The IED with accessories should be mounted in a cubicle in a restricted access
area within a power station, substation or industrial or retail environment.
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.
1MRK 500 127-UEN D
M2370-2 v1
GUID-BEDD698E-356C-4CF9-9DAE-64DB3CEADEAD v1
M2369-2 v3
M2367-2 v1
M2372-2 v1
SEMOD168311-3 v1
GUID-11CCF92B-E9E7-409C-84D0-DFDEA1DCBE85 v2
IP1503-1 v1
GUID-5D1412B8-8F9D-4D39-B6D1-60FB35797FD0 v2
GUID-F2A7BD77-80FB-48F0-AAE5-BE73DE520CC2 v1
670 series
Operation manual