Danfoss VLT 2800 Series, Руководство по эксплуатации

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General information about electrical installation
High voltage warning
The voltage of the frequency converter is
dangerous whenever the equipment is
connected to mains. Incorrect installation
of the motor or frequency converter may
cause damage to the equipment, serious
injury or death. Comply with the instruc-
tions in this manual, as well as national
and local rules and safety regulations.
Touching the electrical parts may be fatal
- even after the equipment has been dis-
connected from mains: Wait at least 4
minutes for current dissipate.
NB!
It is the responsibility of the user or instal-
ler to ensure correct earthing and protec-
tion in accordance with national and local
standards.
Earthing
Comply with the following at installation:
• Safety earthing: The drive has a high leakage
current and must be earthed properly for
safety. Follow all local safety regulations.
• High frequency earthing: Keep earthing con-
nections as short as possible.
Connect all earthing SYSTEMs to ensure the lowest
possible conductor impedance. The lowest possible
conductor impedance is achieved by keeping the con-
ductor as short as possible and by grounding with the
greatest possible surface area. If multiple drives are
installed in a cabinet, the cabinet backplate, which
must be made of metal, should be used as a joint earth
reference plate. The drives must be fitted to the back-
plate at the lowest possible impedance.
To achieve low impedance, connect the drive to the
backplate with the drive fastening bolts. Remove all
paint from the contact points.
Extra protection
RCD relays, multiple protective earthing or earthing
can be used as extra protection, provided that local
safety regulations are complied with. In the case of an
earth fault, a DC content may develop in the faulty cur-
rent. Never use an RCD (ELCB relay), type A, as it is
not suitable for DC faulty currents. If RCD relays are
used, local regulations must be complied with.If RCD
relays are used, they must be:
- Suitable for protecting equipment with a DC
content in the faulty current (3-phase bridge
rectifier).
- Suitable for a pulse-shaped, brief discharge
on power-up.
- Suitable for a high leakage current.
N must be connected before L1 for single phase 200
V reduced leakage current units (type code R4).
High voltage test
A high voltage test can be performed by short-circuit-
ing terminals U, V, W, L1, L2 and L3, and applying
max. 2160 V DC in 1 sec. between this short-circuit
and terminal 95.
Do not perform a high voltage test be-
tween the control terminals and the chas-
sis, because the voltage potential of the
control card cannot exceed approx. 100
volt with respect to chassis due to a volt-
age limiting circuitry.
The terminals are protected against direct
hazardous access through barriers.
VLT
®
2800 Series
MG.27.A2.02 - VLT
®
is a registered Danfoss trademark 63
Installation