Carbolite LHT Instrukcja instalacji, obsługi i konserwacji - Strona 12

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High Temperature Ovens
7.4
Three Phase without Neutral (delta e.g. 208-240V)
Filter (if fitted)
F1
L3
L2
L1
PE
Supply light
Instrument Switch
7.5
Three phase without Neutral (star – e.g. 380-415V)
The circuit is similar to 7.4, but the "neutral" ends of the
elements are not connected to a neutral terminal block.
The control circuit contains an isolating transformer to reduce
the control voltage to 240V or similar.
7.6
Higher Voltages (e.g.254V)
The control circuit contains an isolating transformer to reduce
the control voltage to 240V or similar.
7.7
Stoving & Curing
The following addition is made to the circuit.
control circuit
12
F2
instrument and fan
circuit as above
Fan Motor
exhaust Fan
Fault light
o/temp if
fitted
Pressure
Switch
contactor
SSR
SSR
SSR
element circuit
Relay or Contactor
COIL
e
e
e
l
l
l
e
e
e
m
m
m
e
e
e
n
n
n
t
t
t
(s)
(s)
(s)
F2
transformer
F2
Supply light &
Instrument Switch
MF16