Installation
30
300750767_002_C3 - 12/2020 - © Leybold
Electrical shock caused by direct or indirect contact with live parts.
Electrical shock due to faulty electrical connection and possible residual
voltage up to 5 minutes after disconnection from the mains. The electrical
connection may only be carried out by a trained person. Observe the
national regulations in the user country, e.g. for Europe EN 50110 - 1. Prior
to servicing, disconnect the vacuum pump from the power supply
Electrical shock due to interruption of the protective conductor system. In
the event of a fault, life-threatening voltages may be present on electrically
conductive components.
Before commissioning, check the resistance of the earthing cable and the
suitability of the assigned overcurrent protection device.
Lightning strike.
Risk of fire and injury from lightning strike.
Do not use pumps and pumping systems outside of buildings. The opera-
tor is responsible for assessing the hazard potential when used outside of
buildings.
Wiring the Main Circuit Input
Consider the following precautions for the main circuit input.
■
Use fuses recommended in Main Circuit only, see technical data. Do not
use a motor protection switch.
■
If using a ground fault circuit breaker, make sure that it can detect both DC
and high frequency current.
■
The pump has no circuit breaker. Therefore install a circuit breaker in the
system. Arrange the circuit breaker in such a way that it is easy for the
operator to reach and mark it in such a way that it can be identified as a
disconnecting device for the DRYVAC.
Ground Connection
Take the following precautions when grounding the frequency converter.
■
Always connect the frequency converter to ground in accordance with the
international and local regulations for equipment exhibiting an increased
leakage current.
■
Keep the ground wires as short as possible.
The frequency converter
produces leakage currents
(typically less than 10 mA). In the case of
unbalanced mains power supplies, the leakage current may exceed 10
mA. In this case the protective ground conductor must exhibit a cross-sec-
tion of at least 10 mm
2
. Or connect a further protective ground conductor
having at least the same cross-section as the connection cable. A connec-
tion point is provided, see Fig. 3.1.
