7
Note:
In fans equipped with an EC motor, there is no additional motor protection needed. The motor protection is
integrated in the electronics of the motor.
Important
Damage to motor due to over temperature.
♦
To avoid too many starts and stops a falling delay time of minimum 5 minutes has to be realized in the
control circuit.
Table 5 Motor protection
Type
Motor protection
Thermal protection,
standard
Speed regulation
IV...
By customer
PTC
Possible via frequency converter
IV...(B)
IV...(F)
By customer- must be
bypassed in case of fire
without (PTC optional)
Possible via frequency converter
8.2
Wiring diagram
IV
Important
Wrong connection can damage or destroy the motor.
♦
Use the information on the nameplate to select the correct connection diagram.
Star / Delta
Star / Delta
230 V
400 V
wir
ing_230/400V_180928_001
W2
U2
V2
U1
V1
W1
W2
U2
V2
U1
V1
W1
400 V
690 V
wir
ing_400/690V_190121_001
W2
U2
V2
U1
V1
W1
W2
U2
V2
U1
V1
W1
“1” — Δ
“2” — Y
“3” — Thermal motor protection optional
“1” — Δ
“2” — Y
“3” — Thermal motor protection optional
Two seperate windings
Dahlander
“1” — Connection for low speed
“2” — Connection for high speed
“3” — Thermal motor protection optional
“1” — Connection for low speed
“2” — Connection for high speed
“3” — Thermal motor protection optional
218839 | 002
Summary of Contents for 218463
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