5.4 Additional
Connections
5.4.1 Mains Disconnectors
Frame size
Power & Voltage
Type
D1/D3
P110-P132 380-480 V & P110-P160 525-690 V
ABB OETL-NF200A
D2/D4
P160-P250 380-480 V & P200-P400 525-690 V
ABB OETL-NF400A
Table 5.14
5.4.2 External Fan Supply
In case the frequency converter is supplied by DC or if the
fan must run independently of the power supply, an
external power supply can be applied. The connection is
made on the power card.
Terminal No.
Function
100, 101
102, 103
Auxiliary supply S, T
Internal supply S, T
Table 5.15
The connector located on the power card provides the
connection of line voltage for the cooling fans. The fans
are connected from factory to be supplied form a common
AC line (jumpers between 100-102 and 101-103). If external
supply is needed, the jumpers are removed and the supply
is connected to terminals 100 and 101. A 5 Amp fuse
should be used for protection. In UL applications this
should be LittleFuse KLK-5 or equivalent.
5.4.3 Relay Output
Relay 1
•
Terminal 01: common
•
Terminal 02: normal open 240 V AC
•
Terminal 03: normal closed 240 V AC
Relay 2
•
Terminal 04: common
•
Terminal 05: normal open 400 V AC
•
Terminal 06: normal closed 240 V AC
Relay 1 and relay 2 are programmed in
5-40 Function Relay
,
5-41 On Delay, Relay
, and
5-42 Off Delay, Relay
.
Additional relay outputs can be added to the frequency
converter by using option module MCB 105.
Illustration 5.26
5.4.4 Parallel Connection of Motors
The frequency converter can control several parallel-
connected motors. The total current consumption of the
motors must not exceed the rated output current I
INV
for
the frequency converter.
When motors are connected in parallel,
1-29 Automatic
Motor Adaptation (AMA)
cannot be used.
Problems may arise at start and at low RPM values if motor
sizes are widely different because small motors' relatively
high ohmic resistance in the stator calls for a higher
voltage at start and at low RPM values.
The electronic thermal relay (ETR) of the frequency
converter cannot be used as motor protection for the
individual motor of systems with parallel-connected
How to Install
VLT
®
Refrigeration Drive Design Guide
MG16G102 - VLT
®
is a registered Danfoss trademark
73
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