MR RS 2001, Operating Instructions Manual

Page: 23 / 52

5 Mounting
Maschinenfabrik Reinhausen GmbH 2018 23 1800059/09 EN RS
5 Mounting
This chapter describes how to install and connect the protective relay.
5.1 Installing protective relay in piping and connecting
WARNING
Danger of explosion!
Explosive gases in the protective relay can deflagrate or explode and result
in severe injury or death.
► Wait 15 minutes after switching off the transformer before beginning fur-
ther work on the protective relay so that the gases can dissipate.
► Ensure that there are no ignition sources such as naked flames, hot sur-
faces or sparks (e.g. caused by the build-up of static charge) in the imme-
diate surroundings and that none occur.
► De-energize all auxiliary circuits before beginning work.
► Do not operate any electrical devices during the work (e.g. risk of sparks
from impact wrench).
Always perform all transformer tests with the protective relay attached and
connected.
5.1.1 Electrical protection
NOTICE Damage to the connection cable!
Damage to the connection cable due to incorrect connection.
► When routing the cable, observe the manufacturer specifications.
► Avoid impermissibly tight bending radii and kinking.
You may only connect the protective relay to circuits with an external over-
current protection device and an all-pole isolating device, enabling the equip-
ment to be fully de-energized if required (service, maintenance etc.).
Suitable equipment includes isolating devices in accordance with IEC
60947-1 and IEC 60947-3 (e.g. circuit breakers). Observe the properties of
the relevant circuits (voltage, maximum currents) when selecting the circuit
breaker type. In addition, observe the following:
▪ It must be easy for the operator to access the isolating device
▪ The isolating device must be labeled for the device and circuits to be iso-
lated
▪ The isolating device may not be a part of the power line
▪ The isolating device may not interrupt the main protective conductor