Electrical Installation - Mains Supply; Safety Earthing; Extra Protection (Rcd); Rfi Switch - Danfoss AKD 5001 Manual

Tightening-up torques and screw sizes
The table shows the torque required when fitting
terminals to the frequency converter. For AKD
5001-5027 200-240 V, AKD 5001-5062 380-500 V
the cables must be fastened with screws.
These figures apply to the following terminals:
M M M M a a a a i i i i n n n n s s s s t t t t e e e e r r r r m m m m i i i i n n n n a a a a l l l l s s s s
M M M M o o o o t t t t o o o o r r r r t t t t e e e e r r r r m m m m i i i i n n n n a a a a l l l l s s s s
E E E E a a a a r r r r t t t t h h h h t t t t e e e e r r r r m m m m i i i i n n n n a a a a l l l l
B B B B r r r r a a a a k k k k e e e e r r r r e e e e s s s s i i i i s s s s t t t t o o o o r r r r t t t t e e e e r r r r m m m m i i i i n n n n a a a a l l l l s s s s
L L L L o o o o a a a a d d d d s s s s h h h h a a a a r r r r i i i i n n n n g g g g
AKD type Tightening-up
3 x 200-240 V
AKD 5001-5006 0.5 - 0.6 Nm
AKD 5008-5011
AKD 5016-5022
AKD 5027
AKD type Tightening-up
3 x 380-500 V
AKD 5001-5011 0.5 - 0.6 Nm
AKD 5016-5027
AKD 5032-5042
AKD 5052-5062

Electrical installation - mains supply

Connect the three mains phases to terminals L
High voltage test
A high voltage test can be carried out by short-
circuiting terminals U, V, W, L
energizing by max. 2.15 kV DC for one second
between this short-circuit and the chassis.
NB!:
The RFI switch must be closed (position
ON) when high voltage tests are carried
out (see section RFI Switch).
The mains and motor connection must be interrupted
in the case of high voltage tests of the total installation
if the leakage currents are too high.
MG.50.R3.02 -
Nos 91, 92, 93
L1, L2, L3
Nos 96, 97, 98
U, V, W
No 94, 95, 99
81, 82
88, 89
Screw
torque size
M3
1.8 Nm M4
3.0 Nm M5
4.0 Nm M6
Screw
torque Bolt size
M3
1.8 Nm M4
3.0 Nm M5
4.0 Nm M6
, L , L
1 2
, L and L and
1 2 3
AKD 5000

Safety earthing

NB!:
The frequency converter has a high leakage
current and must be earthed appropriately
for safety reasons. Use earth terminal
(see section Electrical installation, power cables),
which enables reinforced earthing.
Apply national safety regulations.
Motor thermal protection
The electronic thermal relay in UL-approved frequency
converters has received the UL-approval for single
motor protection when parameter 128 has been set for
ETR Trip and parameter 105 has been programmed to
the rated motor current (see motor nameplate).

Extra protection (RCD)

ELCB 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 current.
If ELCB relays are used, local regulations must be
observed. Relays must be suitable for protection
of 3-phase equipment with a bridge rectifier and
for a brief discharge on power-up.
See also the section Special Conditions in
.
3
the Design Guide.

RFI switch

Mains supply isolated from earth:
If the frequency converter is supplied from an isolated
mains source ( IT mains), the RFI switch can be
turned off (OFF). In OFF position, the internal RFI
capacities (filter capacitors) between the chassis and
the intermediate circuit are cut off to avoid damage
to the intermediate circuit and to reduce the earth
capacity currents (according to IEC 61800-3).
NB!:
The RFI switch is not to be operated with
mains connected to the unit. Check that
the mains supply has been disconnected
before operating the RFI switch.
NB!:
Open RFI switch is only allowed at factory
set switching frequencies.
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