EN
02/08/22
User Manual RPS/T 20kVA 62000587_02_
17
4.2.
PROTECTIONS
Mandatory
Safety protection (Magneto-thermal and differential) are mandatory according to
the nominal RPS/T characteristic.
An additional adequate protection
must be added
when electrical components
(cable, Equipment under test
–
EUT) cannot support RPS/T performance.
4.2.1.
RCD Protection
It is necessary to insert a differential protection both in input and output; this because there is a
galvanic isolation from the input to the output, so the input RCD switch does not see leakage
current to the ground on the output.
Suggested RCD protections:
1.
Input line
→
1/3-Phase
B-type RCD
switch 30mA;
2.
1-phase Output line
→
1-phase RCD switch depend of use;
3.
3-phase Outuput line
→
3-phase RCD switch depend of use;
4.2.2.
Magneto-Thermic protections
The Magneto-thermic circuit breaker protect the line from short circuits. Generally, depends on
the load and on the connection (section and length of the cable).
It is recommended to use a magneto-thermal protection with
type C
curve according to the
nominal characteristic