12
Example
How a MAXIMUM CURRENT RELAY (RHI) works:
Supposing it is to control a load with the following ratings:
I
n
= 5 A
(rated regular operating current)
V
n
= 230 V ac (rated regular operating voltage)
I
max
= 6 A
(current at which RHI relay trips)
1
°
Connect as shown in diagram (for I
max
= 6 A).
N.B.: Normally, connect terminals:
7-10 if I
max
is
≤
2 A
7-11 if I
max
is > 2 A and
≤
5 A
7-12 if I
max
is > 5 A and
≤
10 A
A
1
2
5
6
4
3
7
8
11 12
10
9
Allarme
Tensione
di alimentazione
230 Vc.a.
F
N
Carico
RHI
Rete da controllare I
max
6A
C
Power supply
voltage
230 V ac
Load
Output relay
(alarm)
Line current to be controlled
I
max.
6A
