Carbolite VCF Series - Manual (Page 12)

VCF
12
MF25 – 3.09
7.0 C IRCUIT D IAGRAMS
EMC Filters (if fitted): dependent on the model there may be one filter, or more than one fitted in
parallel. The circuit diagram examples do not show multiple filter arrangements.
7.1 Single Phase
NOTE – models before mid-2002: in some models two door switches were fitted directly in the
element circuit, instead of a single switch and contactor.
7.2 2-phase with neutral
As 3-phase, with phase L3 not present, and with two SSRs and element circuits.
NOTE – models before mid-2002: in some models two door switches were fitted directly in the
element circuit, instead of a single switch and contactor.
7.3 3-phase with neutral
note on 2- and 3-phase: depending on EMC filter, there may be separate neutrals for each phase from
the elements, through the filter(s), to the neutral terminal block.
Instrument Switch
coil
temperature
controller
overtemp.
controller
door
switch
SSR
e
l
e
m
e
n
t
(s)
heat
on
F3
F1
F2
F3
N
L
PE
Filter (if fitted)
contactor
or relay
if fitted
thermocouple
thermocouple
e
l
e
m
e
n
t
(s)
e
l
e
m
e
n
t
(s)
F1
N
L2
L3
F2
L1
PE
e
l
e
m
e
n
t
(s)
Instrument Switch
coil
temperature
controller
overtemp.
controller
door
switch
SSR
heat
on
F3
SSR
SSR
heat
on
F3
heat
on
F3
Filter (if fitted)
if fitted
thermocouple
thermocouple
contactor