Electrical installation
Drive motor connection
27
© Lutz-Jesco GmbH 2018
Subject to technical changes.
181112
BA-10407-02-V08
Motor-driven diaphragm dosing pump
MEMDOS LB
Operating instructions
9 Electrical installation
DANGER
Mortal danger from electric shock!
If there is an electrical accident, you must disconnect the dosing pump
from the mains as quickly as possible.
ð
Install an emergency stop switch or integrate the dosing pump into
the plant safety concept.
CAUTION
Danger of automatic start up!
The dosing pump does not have an ON/OFF switch and may start to
pump as soon as it is connected to the mains supply. This means that
dosing medium can escape. Depending on the type and hazardousness
of the dosing medium, this can result in damage to property or to injury.
ð
Install an emergency stop switch or integrate the dosing pump into
the plant safety concept.
NOTE
Damage due to incorrect mains voltage
The dosing pump can be damaged if you connect it to the wrong mains
voltage.
ð
Observe the information on the mains supply that is given on the
rating plate.
Safety instructions for installation in a potentially explosive atmosphere:
DANGER
Danger to life through explosions!
Explosions may result which could result in fatal injuries.
ð
Earth the dosing pump, drive motor and all metal parts along the
suction and pressure piping route.
9.1 Drive motor connection
n
The electrical connection comply with local regulations.
n
Cable type and cross-section of the supply lines must be chosen ac-
cording to the motor data.
n
We recommend using gland connections with strain-relief clamp.
n
The required protection degree must be ensured by installing the con-
nections professionally.
n
The motor must be protected by a suitable motor protection switch.
n
The dosing pump must be earthed via a PE conductor for the connec-
tion to the termination box.
n
If an ATEX certified motor is being used, you must also observe the en-
closed motor operating instructions.
n
The motor must be connected to the termination box in accordance
with the circuit diagram.
i
In individual cases, the motor can be fitted with a terminal strip
with only three terminals. In this case, use the appropriate
adapter located in the housing (see image). Make sure that the
correct symbol for a Y-connection or a delta connection is on
the adapter.
9.1.1 Three-phase motors
Connection
Phases
MEMDOS LB
Star connection
W2
U2
V2
U1
V1
W1
L1
L2
L3
PE
3 ~
4 - 1010
Delta connection
W2
U2
V2
U1
V1
W1
L1
L2
L3
PE
3 ~
4 - 1010
Table 21: Three-phase motors circuit diagrams
Terminal strip
Installed adapter
Adapter for replacement
