Application Conditions For The Units; Special Conditions; Short-Circuit Protection - Burkert PTB 02 ATEX 2094 X Manuel D'utilisation

5 APPLICATION CONDITIONS FOR
THE UNITS
5.1

Special conditions

5.1.1

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 Ib
according to IEC 60127-2-1) 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).
In the case of versions A and L of the solenoid, short-circuit pro-
tection must be assured by the operator. In the case of version K of
the solenoid, the fuse is installed in the terminal box of the device.
More detailed descriptions of versions A, L and K are to be found in
the section "Technical Data".
8
english
PTB 02 ATEX 2094 X

Application Conditions for the units

Fuse/contactor ... A
5.1.2 Operation with associated valve body
The solenoids coil type 64.-....-...-. / 65.-....-...-. may only be operated
with a matching valve body as a complete device, complying with
the following requirements:
Materials with single and block assembly:
• metal (brass, aluminium, stainless steel) or
• plastics (e,g, polyamide PA 6 GV ...)
DANGER!
Risk of explosion!
▶ When using the devices in petrol pumps for the control of petrol
in category 2, a valve body made of metal (brass, aluminium or
stainless steel) must be employed!
Minimum dimensions of the valve bodies:
32 mm x 32 mm x 10 mm (L x W x H)
A larger valve body with better heat conductance may be attached
at any time.