English (GB)
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7.3 Additional protection
7.3.1 Single-phase motors
If the motor is connected to an electric installation where an earth
leakage circuit breaker (ELCB) or ground fault circuit interrupter
(GFCI) is used as additional protection, this circuit breaker or
interrupter must be marked with the following symbol:
You find the leakage current of the motor in section
7.3.2 Three-phase motors
If the motor is connected to an electric installation where an earth
leakage circuit breaker (ELCB) or ground fault circuit interrupter
(GFCI) is used as additional protection, this circuit breaker or
interrupter must be of the following type:
• It must be suitable for handling leakage currents and cutting-in
with short pulse-shaped leakage.
• It must trip out when AC fault currents and fault currents with
DC content, i.e. pulsating DC and smooth DC fault currents,
occur.
For these motors, use an earth leakage circuit breaker or ground
fault circuit interrupter, type B.
The circuit breaker or interrupter must be marked with the
following symbols:
You find the leakage current of the motor section
Protection against phase unbalance
Connect the motor to a power supply with a quality corresponding
to IEC 60146-1-1, class C, to ensure correct motor operation at
phase unbalance.
This also ensures long life of the components.
7.4 Connection terminals
The descriptions and terminal overviews in this section apply to
both single-phase and three-phase motors.
For maximum tightening torques, see section
, page
The number of terminals depends on the functional module. See
section
22. Identifying the functional module
.
7.4.1 Connection terminals, advanced functional module, FM
300
The advanced functional module is only available as an option.
The advanced module has these connections:
• three analog inputs
• one analog output
• two dedicated digital inputs
• two configurable digital inputs or open-collector outputs
• Input and output for Grundfos Digital Sensor
• two Pt100/1000 inputs
• two LiqTec sensor inputs
• two signal relay outputs
• GENIbus connection.
See fig.
.
• Inputs and outputs
All inputs and outputs are internally separated from the
mains-conducting parts by reinforced insulation and
galvanically separated from other circuits.
All control terminals are supplied by safety extra-low voltage
(SELV), thus ensuring protection against electric shock.
• Signal relay outputs
– Signal relay 1:
LIVE:
Mains supply voltages up to 250 VAC can be connected to
this output.
SELV:
The output is galvanically separated from other circuits.
Therefore, you can connect the supply voltage or safety
extra-low voltage to the output.
– Signal relay 2:
SELV:
The output is galvanically separated from other circuits.
Therefore, you can connect the supply voltage or safety
extra-low voltage to the output as desired.
• Mains supply, terminals N, PE, L or L1, L2, L3, PE
A galvanically safe separation must fulfil the requirements for
reinforced insulation including creepage distances and
clearances specified in EN 61800-5-1.
Note
When an earth leakage circuit breaker or ground
fault circuit interrupter is selected, take the total
leakage current of all the electrical equipment in the
installation into account.
Note
When an earth leakage circuit breaker or ground
fault circuit interrupter is selected, take the total
leakage current of all the electrical equipment in the
installation into account.
ELCB
(GFCI)
ELCB
(GFCI)
Note
Digital input 1 is factory-set to be start/stop input
where open circuit will result in stop.
A jumper has been factory-fitted between terminals 2
and 6. Remove the jumper if digital input 1 is to be
used as external start/stop or any other external
function.
Note
As a precaution, the wires to be connected to the
connection groups below must be separated from
each other by reinforced insulation in their entire
lengths.
