technical documentation manuals 308013008

Electrical connection |
21
8.2.2 Wiring diagram
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
wiring_230/400V_180928_001
W2 U2 V2
U1 V1 W1
W2 U2 V2
U1 V1 W1
400 V
690 V
wiring_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
8.3 Frequency converter (if used)
Risk from resonant frequencies when using frequency
converter.
♦ Only operate the fan outside these speed ranges.
♦ Pass through these speed ranges so quickly that any
vibration cannot exceed the admissible resonant
frequency values.
♦ For variable-speed fans, use a permanent vibration
monitoring for long-term safe operation.
♦ Observe the operating instructions of the frequency
converter.
Commissioning of the frequency converter
♦ Install the fan and frequency converter as near as
possible to one another.
♦ Use shielded cables.
♦ All components (fan, frequency converter and motor)
must be grounded.
♦ We recommend using all-pole sinus filters.
♦ Never exceed the maximum impeller rotation speed
indicated on the name plate of the fan.
Operation of the frequency converter
♦ Heating of the motor due to use of a variable frequency drive must be checked in the application by the customer.
♦ Avoid running the fan via the frequency converter below 10 Hz.
♦ Starting time: min. 60 sec.
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