Application Conditions Of The Units; Special Conditions; Short-Circuit Protection - Burkert PTB 03 ATEX 5014 X Instructions De Service

APPLICATION CONDITIONS FOR THE UNITS

SPECIAL CONDITIONS

Short-circuit protection

As a short-circuit protection, each magnet must be connected in series with a
fuse corresponding to its rated current (max. 3 x I
1) or a motor protector switch with a fast-acting short-circuit and thermal trip
(set to the rated current). For very small rated currents for the magnets, the
fuse with the smallest current value according to the above-mentioned IEC
standard will suffice. This fuse may be mounted in the associated supply unit
or must be connected in series separately. The rated voltage of the fuse must
be equal to or larger than the quoted nominal voltage of the magnet. The
switch-off capability of the fuse cartridge must be equal to or greater than the
maximum theoretical short-circuit current at the installation location (normally
1500 A).
For the valve types 641, 2832, 6013 and 6022 in the versions without fuses,
the short-circuit protection must be guaranteed by the operator. For the ver-
sion with a fuse, the latter is built into the terminal box of the device. A more
detailed description of the models can be found in the „Technical Data" section
of the various models.
Operational temperature range
Please note the operational temperature range listed for each type in the
„Electrical Data"!
8 - 03 ATEX5014 X
according to IEC 60127-2-
b
Fuse ...... A