Power Element - Pilz PMCprotego D.48 Operating Manual

Function Description
4.2

Power element

The power element of the servo amplifier converts the fixed voltage and frequency of the
mains into a variable voltage and frequency for driving the motor. This means that the rota-
tional speed and torque are infinitely variable. The power element consists of
} EMC filter A
}
Rectifier B
}
Charging circuit with intermediate circuit C
}
Brake chopper D
}
Inverted rectifier E
Fig.: Power element
4.2.1 Mains voltage
The servo amplifier is suitable for connection to TT and TN networks. The voltage range of
the servo amplifier is 3 x 208 VAC - 3 x 480 VAC.
Please note the maximum permitted voltages between the external conductors (L1, L2, L3)
and the servo amplifier housing:
}
Periodic overvoltages between the external conductors and the housing: Max. 1000 V
(amplitude)
Operating Manual PMCprotego D.48, PMCprotego D.72
1001735-EN-04
A
CAUTION!
Risk of overvoltage
Overvoltage can destroy the device and lead to minor injuries.
Select the correct mains voltage and the correct device type.
DANGER!
Risk of electrocution
If the servo amplifier is not earthed correctly, there is a risk of serious injury
or death due to electric shock.
Use isolating transformers for asymmetrically earthed or unearthed
400 V ... 480 V supplies.
D
B C E
3
30