Grundfos CMBE 3-93 Instrucciones De Instalación Y Operación página 9

6. Electrical connection
WARNING
Electric shock
‐
Do not make any connections in
the terminal box unless the power
supply has been switched off for at
least 5 minutes.
‐
Make sure that the power supply
cannot be switched on accidentally.
‐
The motor must be earthed and
protected against indirect contact in
accordance with local regulations.
‐
If the power supply cable is dam-
aged, it must be replaced by the
manufacturer, the manufacturer's
service partner, or a similarly quali-
fied person.
The user or the installer is responsible for the
installation of correct earthing and protection
according to local regulations. All operations must
be carried out by a qualified electrician.
1. Carry out the electrical connection according
to local regulations.
2. Check that the supply voltage and frequency
correspond to the values stated on the
nameplate.
6.1 Protection against electric shock,
indirect contact
WARNING
‐
The motor must be earthed and
protected against indirect contact in
accordance with local regulations.
Protective-earth conductors must always have a
yellow/green (PE) or yellow/green/blue (PEN)
color marking.
6.1.1 Protection against mains voltage
transients
The motor is protected against mains voltage
transients in accordance with EN 61800-3.
6.1.2 Motor protection
The motor requires no external motor protection.
The motor incorporates thermal protection against
slow overloading and blocking.
6.2 Mains supply
6.2.1 Single-phase supply voltage
• 1 x 110-115 V - 10 %/+ 10 %, 50/60 Hz, PE
• 1 x 200-240 V - 10 %/+ 10 %, 50/60 Hz, PE.
We recommend that you check that the supply
voltage and frequency correspond to the values
stated on the nameplate.
If the motor is supplied through an IT network, a
dedicated IT network motor should be used.
Contact Grundfos for further assistance.
1 x 200-240 V models
The wires in the motor terminal box must be as
short as possible. Excepted from this is the
separated earth conductor which must be so long
that it is the last one to be disconnected in case
the cable is inadvertently pulled out of the cable
entry.
L2
L1
PE
Example of a direct-connected motor with
disconnect switch, back-up fuse, and additional
protection
PE
L
N
Mains connection for 1 x 200-240 V models,
single-phase motors
1 x 115 V models
Connect plug and line cord on the pump to the 1 x
115 V outlet from the electricity supply.
N
L
9