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IV-50 EC | 13
8.6 Residual current circuit breaker
◊ All-current-sensitive residual current circuit breakers are required for use in alternating-current systems with 50/60 Hz, in combina-
tion with electronic devices such as EC motors, frequency converters or uninterruptible power supplies (UPS).
9 Commissioning
9.1 Safety information
◊ Commissioning may only be carried out by adequately qualified persons, see Table 1: Qualifications.
◊ Wear protective equipment during all work in the vicinity of the fan, see 2.2 Personal protective equipment.
9.2 Preconditions
◊ Installation and electrical connections have been correctly performed.
◊ Residual material from installation and foreign objects have been removed from the fan housing.
◊ Inlet and outlet are free of obstruction.
◊ Safety devices have been fitted.
◊ Ground cable is connected.
◊ Cable glands are tight.
◊ Nominal current (from the nameplate) is not exceeded.
◊ Data on the nameplate corresponds with the connection data.
9.3 Tests
1. Before switching the fan on, check for externally visible damage and ensure that the protective equipment functions properly.
2. Switch the fan on.
3. Checks:
a. Direction of rotation. The direction of rotation always applies while looking at the impeller through the inlet of the
fan.
i. The direction of rotation is best observed just before the fan stops.
b. Vibration levels
c. Current consumption
i. Compare the current consumption with the nominal consumption on the nameplate.
d. Tightness of all connections
e. Ensure correct speed control operations, if applicable
4. Switch the fan off.
10 Operation
10.1 Safety information
Signal Type Condition Resulting Frequency Value Conductors
Frequency
(speed reference)
Speed = 0 Zero (output voltage 4.8V)
White Black
Speed > 0 Speed (rpm) x 0.6015
Table 3: Speed reference
Warning
Hazard from electrical voltage or moving components.
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