5 Mounting
Maschinenfabrik Reinhausen GmbH 2020
78
4983703/01 EN
VACUTAP
®
VV-Ex
5.5.2.1 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 cir-
cuit breaker type. All circuits and suitable equipment such as isolating de-
vices must satisfy the requirements on explosion protection applicable in the
respective potentially explosive area.
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 the circuits to be
isolated
▪ The isolating device may not be a part of the power line
▪ The isolating device may not interrupt the main protective conductor
▪ The isolating device is to be rated such that the permissible disconnect
times for protection against electric shock are complied with in accor-
dance with the requirements of DIN VDE 0100-410, depending on the
type of ground connection.
▪ The functionality of the circuit breaker tripping circuit (supply line to the cir-
cuit breaker coil) must also remain guaranteed at all times, even if the iso-
lating device is tripped.
