6.5 Connecting the machine to the power supply
Precondition The power supply disconnecting device is switched off,
lockout and tagout the device, and the absence of any voltage has been verified.
The machine must be isolated from the compressed air network and
completed vented before undertaking any work on the pressure system, the machine is depressur‐
ized and the pressure gauge reads 0 psig.
The tolerance limits of the power supply are within the permissible tolerance limits of the rated ma‐
chine voltage.
Option C32, operation under frequency control: The voltage in the intermediate circuit capacitors of
the frequency converter is reduced.
1. The power supply must only be connected by authorized installation personnel or an author‐
ized electrician.
2. Carry out safety measures as stipulated in relevant regulations and in national accident pre‐
vention regulations. In addition, observe the regulations of the local electricity supplier.
3. Select supply cable conductor cross sections and fusing in accordance with machine power
and as per local regulations.
4. The user is required to fit the machine with a lockable power supply disconnecting device
which must comply with the requirements of EN60204-1:2006. 5.3.
This could be, for example, a load disconnect switch with fused input. If a circuit breaker is
used it must be suitable for the motor starting characteristics.
5. Connect the drive motor to the power supply in accordance with the applicable electrical dia‐
gram.
See electrical diagram in chapter 13.5.
6. The user's safety devices must be correctly connected to the machine's electrical system by a
qualified person.
7. Option C32, operation under frequency control: Please refer to - and observe - all documenta‐
tion regarding operation of, and work on, the frequency converter.
8.
Danger of fatal injury from electric shock!
➤ Switch off and lock out the power supply disconnecting device and verify the absence of
voltage.
➤ When working with the frequency converter: Wait at least 5 minutes for dangerous voltag‐
es to subside.
9. Connect the machine to the power supply.
10. Properly close openings, cable glands, etc.
The machine can be operated at full power at the nominal voltage with a tolerance of ±5 %.
6.5.1 Option C32
For frequency control
If the machine delivered by KAESER includes the frequency converter, the regulation behav‐
ior and operating mode of the frequency converter will be preset.
➤ Adapt and optimize the actual properties to the customer system on-site.
Comply with the following provisions if you operate machines with a frequency converter:
■ Operate the machine only within its performance limits and under the permitted ambient condi‐
tions.
6
Installation
6.5
Connecting the machine to the power supply
Number: 9_9572 28 USE
Installation and Operating Manual Rotary lobe blower
HBPI pr
41
