Dutypoint VT Booster Set, O & M Manual

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English (GB)
6
6.3 Additional protection
If the motor is connected to an electric installation where an earth
leakage circuit breaker is used as additional protection, this
circuit breaker must be of the type:
• which is suitable for handling leakage currents and cutting-in
with short pulse-shaped leakage.
• which trips out when alternating fault currents and fault
currents with DC content, i.e. pulsating DC and smooth DC
fault currents, occur.
For these motors an earth leakage circuit breaker type B must be
used.
This circuit breaker must be marked with the following symbols:
The leakage current of the motor can be found in section
18.2 Leakage current
.
6.4 Motor protection
The motor requires no external motor protection. The motor
incorporates thermal protection against slow overloading and
blocking (IEC 34-11: TP 211).
6.5 Protection against mains voltage transients
The motor is protected against mains voltage transients in
accordance with EN 61800-3.
6.6 Protection against phase unbalance
The motor must be connected to an electricity supply with a
quality corresponding to IEC 60 146-1-1, class C, to ensure
correct motor operation at a phase unbalance.
This also ensures long life of the components.
6.7 Supply voltage
• 3 x 380-480 V ± 10 %, 50/60 Hz, PE.
The supply voltage and frequency are marked on the motor
nameplate. Please make sure that the motor is suitable for the
electricity supply on which it will be used.
The wires in the motor terminal box must be as short as possible.
Excepted from this is the protective 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.
For maximum backup fuse, see section
18.1 Supply voltage .
Fig. 9 Example of a mains-connected motor with mains
switch, back-up fuses and additional protection
Fig. 10 Mains connection
6.8 Start/stop of motor
If a higher number of starts and stops is desired, the input for
external start/stop must be used when starting the motor.
When the motor is started via an external on/off switch, the motor
will start immediately.
Note
When an earth leakage circuit breaker is
selected, the total leakage current of all the
electrical equipment in the installation must be
taken into account.
MGE 90 to MGE 132
T
M
00
92
70
46
96
ELCB
L1
L2
L3
L2
L1
L3
PE
ELCB
MGE 90 to MGE 132
TM
02
90
33
15
04
Warning
If the supply cable is damaged, it must be
replaced by the manufacturer, the manufacturer's
service partner or similarly qualified persons in
order to avoid a hazard.
Caution
The number of starts and stops via the mains
voltage must not exceed 4 times per hour.
When the motor is switched on via the mains,
the motor will start after approx. 5 seconds.
PE
L3
L2
L1