Chapter 2 - Safety Instructions
6 3BHS335648 E82 UNITROL 1020 User Manual
2.3 Safety Concept
2.3.1 General
The safety regulations in this chapter generally apply when working on
the excitation system. You will find additional instructions and warnings
related to particular topics or actions throughout the manual where
relevant.
The following regulations must be strictly observed:
The technical specifications and the typical application of the
excitation system (see Chapter 1 - Introduction, Field of Application)
must be strictly adhered to.
Training of personnel: only trained personnel are allowed to install,
operate, maintain or service the excitation system.
Modifications without authorization: modifications and constructional
changes of the equipment are not allowed.
Duty of maintenance: The owner must ensure that the excitation
system is used only under proper conditions and in a fully
serviceable state.
2.3.2 Safety Rules
The following safety procedures according to EN 50110-1 must
absolutely be followed if any (maintenance) work is carried out on the
excitation system:
1 Disconnect completely.
2 Secure against re-connection.
3 Verify that the installation is dead.
4 Carry out grounding and short-circuiting.
5 Provide protection against adjacent live parts.
2.3.3 Residual Danger Areas
Danger areas that cannot be eliminated by technical measures are
clearly marked with warning labels.
The operating voltage in the control cubicles is above 50 V. In the power
part, voltages can reach 300 V ac and short-circuit currents can be very
high. In order to warn personnel against opening the doors during
operation, warning labels are affixed to all cubicle doors.
If the device is built into a whole system, other warning labels are
attached to the inside of the cubicle doors and to the covers of the
power converter modules.
The following residual danger areas must be taken into account when
working on the excitation system:
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