Amarex KRT series, Installation And Operating Manual, Page: 39 / 124

5 Installation at Site
39 of 124
Amarex KRT
1 2
5
4 3
6
Fig. 27: Vacuum balance line
1 Vessel under vacuum 2 Vacuum balance line
3 Shut-off element 4 Swing check valve
5 Main shut-off element 6 Vacuum-tight shut-off element
NOTE
An additional line fitted with a shut-off valve (from the pump discharge nozzle to
the balance line) facilitates venting of the pump before start-up.
5.4 Electrical system
5.4.1 Information for planning the control system
For the electrical connection of the pump set observe the wiring diagrams.
(
ð Section 9.3, Page 108)
The pump set is supplied with power cables; it is wired for DOL starting.
NOTE
When laying a cable between the control system and the pump set's connection
point, make sure the number of cores for the sensors is sufficient. A minimum cross-
section of AWG 15 [1.5 mm²] is required.
The motors can be connected to electrical low-voltage grids with rated voltages and
voltage tolerances to IEC 60038. The permissible tolerances must be observed.
(
ð Section 6.2.2, Page 50)
5.4.1.1 Overload protection
1. Protect the pump set against overloading by a thermal time-lag overload
protection device in accordance with IEC 60947 and local regulations.
2. Set the overload protection device to the rated current specified on the name
plate.