Vents NK 100-0,6-1, User Manual

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WIRING DIAGRAM OF THE RECTANGULAR HEATER WITH THREE ELECTRICAL HEATING ELEMENTS, THREE-PHASE POWER SUPPLY,
DELTA CONNECTION AND TIME-DELAY RELAY
S
KT
M KM
N
PE
E1...E3
RESET
X1
Q
S1 Т°
Т°
Heater
S2
X2
PE
L1 L2 L3
1
2
3
4
5
6
7
8
WIRING DIAGRAM OF THE RECTANGULAR HEATER WITH THREE ELECTRICAL HEATING ELEMENTS,
THREE-PHASE POWER SUPPLY, STAR CONNECTION AND TIME-DELAY RELAY
S
L1 L2 L3
Q
KT
M
N
PE
KM
X1
S1
Heater
T°
RESET
S2 T°
E1...E3
X2
PE
1
2
3
4
5
6
7
8
S –
ON\OFF switch
KT –
time-delay relay
M –
fan
KM –
magnetic starter
Q –
automatic circuit breaker
Operation principle of the electric heater with control circuits is as follows:
As the ON/OFF switch
S
turns ON, the
KM
magnetic starter coil is charged through the closed contacts of the thermal switches. Consequently electric
power is supplied to the heating elements through the closed contacts of the thermal switches and magnetic starter. Should at least one of the thermal
switches turn on the power circuit of the magnetic starter
KM
and of the heating element gets broken thus preventing the heater overheating. The
diagram shows the fan connection example with the time-delay relay
KT
. The motor
M
is turned off before the heater is turned off to ensure the electric
heating elements cooling.
The automatic circuit breaker
Q
is designed for overload protection of the electrical circuits.
Wiring diagram types are determined by quantity of the heating elements, supply voltage characteristics, number of phases.