Manual –TC.GXS
2016-09-16
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Template V02.11
c) Work on live equipment
It is imperative that this form of working is avoided. If it cannot be
avoided, careful work preparation is essential. Pay attention to the
following:
1. The personnel must be specially trained.
2. Work in accordance with recognised specialist methods.
3. Controlled personal protective equipment must be available.
(passive protection)
4. Organisation of the working areas.
5. Supervision and preparatory measures.
(active protection)
6. Use appropriate protection against physical contact
throughout.
Set up a suitable EMERGENCY STOP chain and test it at
regular intervals!
Mark all wires and cables to prevent mistakes.
Electrical heating
TopCon power supply system’s operate with significant amounts of
energy. High currents can cause heating of cables and wires. In
particular, during unmonitored endurance tests insulation fires and
short-circuits may be caused.
•
At particular risk are connectors, switchgear and cable terminals.
Check these parts particularly carefully and at regular intervals.
•
Use wiring material suitable and stipulated for your application
with the related insulation class!
•
Monitor your system actively or passively using appropriate
sensors or by monitoring parameters.
Arcing and sparking on opening contacts
In relation to DC systems, note that on opening a circuit through which
a current is flowing, arcing with very high energies can be produced
depending on the inductance!
In some circumstances this arcing can result in burns, damage to the
eyes as well as damage, destruction or fire on parts of the system.
The usage of normal mains contactors as isolating devices in DC
circuits is not recommended! Instead use DC contactors. In case of
doubt contact the related manufacturer.
Take into consideration that the protective devices on the TopCon low-
voltage system cannot detect an arc as a fault condition, as this
situation may be a required function.
