Pfeiffer Vacuum A 1204H, Operating Instructions Manual

Page: 27 / 92

Installation
27
close the electrical box.
5.8.1 Customer electrical installation protection
Installation protection with circuit breaker
The user must supply the pump from facilities equipped with main circuit breaker,
curve D (IEC 60947-2), in accordance with local regulations and with at least a 10 kA
short circuit cut-off capacity. This protection device should be in close proximity to the
pump (no further than 7 m) within line of sight of the pump.
This circuit breaker supply and wiring is a customer’s responsibility: main circuit breaker
rating
(see 14.2.4) .
Differential circuit breaker
In the event of an insulation defect, you must install a differential circuit breaker on the
main power supply to protect personnel
(see 14.2.4) . Contact your service center for ad-
vice. In all cases, comply with current local regulations.
An IEC 60417#5019 symbol is located on the rear panel for the main power supply
earth terminal (see 4.2) .
5.8.2 Connection to the mains power supply
The pump is supplied with a female plug (delivered with the product).
Connect the mains cable to the power supply connector according following diagram,
using wires with characteristics defined in
(see 14.2.4) .
Connect the plug on and lock it (see 4.2) .
Fig. 8: Main supply connection
5.8.3 Emergency button
The pump is equipped with an emergency stop EMS located at the front of the pump
through an emergency stop button and through an EMS stop connector located at the
rear of the pump. When activated, these two elements cut off the control circuit and stop
the pump.
The emergency stop circuit consists of electromechanical components: resetting them
does not cause the pump's restart.
The pump can run only if the cover plug is and fitted on connector (delivered with the
pump) .
CAUTION
Risk of earth fault
The user must provide a second protective earth (ground) conductor with a cross-sec-
tional area at least equal to the conducting wire size.
Connect the protective earth stud to the suitable installation earth point such as the
host system frame or primary grounding point.
Ensure that the equipment and the electrical supply cable are suitably protected
against earth defects and that the earth wire is longer than the 3 conducting wires.
L3
L2
L1