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2.1.3 Distribution network
All regular electrical devices without special circuits generate harmonic currents into
distribution network. High rates of harmonic current may cause losses and disturbance to
some equipment.
KempArc 500
This equipment complies with IEC 61000-3-12 provided that the short-circuit power Ssc
is greater than or equal to 4.6 MVA at the interface point between the user’s supply and
the public supply network. It is the responsibility of the installer or user of the equipment
to ensure, by consultation with the distribution network operator if necessary, that the
equipment is connected only to a supply with a short-circuit power Ssc greater than or equal
to 4.6 MVA.
KempArc 400
This equipment complies with IEC 61000-3-12 provided that the short-circuit power Ssc
is greater than or equal to 4.7 MVA at the interface point between the user’s supply and
the public supply network. It is the responsibility of the installer or user of the equipment
to ensure, by consultation with the distribution network operator if necessary, that the
equipment is connected only to a supply with a short-circuit power Ssc greater than or equal
to 4.7 MVA.
KempArc 300:
WARNING: This equipment does not comply with IEC 61000-3-12. If it is connected to a public
low voltage system, it is the responsibility of the installer or user of the equipment to ensure,
by consultation with the distribution network operator if necessary, that the equipment may
be connected.
2.1.4 Connecting the power source to the electric network
The KempArc SYN power source is connected to a 400-V three-phase network. The machine
is equipped with a ve-metre mains cable that does not have a plug. Before use, check the
mains cable and install a mains plug. If the cable does not comply with the local electrical
regulations, replace it with a compliant cable.
NOTE! The mains cable or plug may be installed or replaced by only an electrical contractor or
installer authorised to perform such operations.
Replacement of the mains cable
1. Unscrew the mounting screws on the top and sides of the machine, and remove the case
by lifting it.
2. Disconnect the phase leads from connectors L1, L2, and L3, and disconnect the
protective earth lead.
3. Pass the cable to the machine through the inlet ring at the rear of the machine, and
secure the cable with a cable clamp.
4. Connect the cable’s phase leads to connectors L1, L2, and L3.
5. Connect the yellow-green protective earth lead to its connector .
NOTE! Do not connect the zero lead if you are using a ve-lead cable.
The table below lists the fuse sizes for 100% load in a 400-V three-phase network with
4 x 6-mm² cable for dierent power source models.
Model Fuse
SYN 300 20 A delayed
SYN 400 25 A delayed
SYN 500 35 A delayed
5
KempArc SYN 300, 400, 500, DT 400 / © Kemppi Oy / 1117
7


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