Carbolite HRF 7/45 - Manual (Page 10)

HRF
10 MLF05-1.23
7.3 3-phase “universal” wiring
Fuses F1 are always present in this wiring design.
Fuses F2 could be absent in some circumstances, if the circuit does not exceed 10A.
Fuses F3 are present if the circuit exceeds 25A, but otherwise are usually absent.
Instrument Switch
coil
temperature
controller
overtemp.
controller
thermocouple SSR
heat
on
F3
F1
F2
F3
SSR
SSR
F3
heat
on
F3
e
l
e
m
e
n
t
(s)
heat
on
F3
F3
if fitted
contactors
or relays
Filters
e
l
e
m
e
n
t
(s)
e
l
e
m
e
n
t
(s)
coil
L
N
L
N
L
N
thermocouple
A model made to this diagram can be
converted by the customer between the
following supply voltages:
between 3-phase + neutral in the range
380/220V – 415/240V
and 3-phase delta in the range
220V – 240V
and single phase in the range
220V – 240V
3-phase + neutral
Circuit no. 1
N
L
N
L
Circuit no. 2
Circuit no. 3
N
L3
L2
L1
Supply
Terminals
N
L
Fuses or
EMC filters
PE
Not
used
3-phase delta
Circuit no. 1
N
L
N
L
Circuit no. 2
Circuit no. 3
N
L3
L2
L1
Supply
Terminals
N
L
Fuses or
EMC filters
PE
1-phase
Circuit no. 1
N
L
N
L
Circuit no. 2
Circuit no. 3
N
L3
L2
L1
Supply
Terminals
N
L
Fuses or
EMC filters
PE
Not
used