ABB ACS2000 User Manual page 36

36 A C S 2 0 0 0 , 4 K V U S E R M A N U A L
—
TEU - Terminal Entry Unit
36
The terminal entry unit provides the terminals for
Terminal entry unit
the line supply (power in) and motor cables and the
—
ground bus for the termination of the ground cable
37
Airflow - AFE/INU
and the cable shields.
compartment (cross-
section rear view)
The cables enter through the top or through the
floor of the cabinet: the ACS2000 drive supports
either method.
The ground bus slotted hole feature supports both
NEMA and IEC lugs.
1 Motor OUT terminals (U2, V2, W2)
2 Power IN terminals (L1, L2, L3)
—
36
Cooling
The air cooling unit feeds air to the main power
electronic components to transfer heat out of the
cabinet. The standard cooling fan is a 3.8 kW unit
with the following performance characteristics:
• Power: 3.8 kW
• Airflow capacity: 8500 m3/h [5000 cfm]
• Pressure: 600 Pa [2.4 in. H20]
• Speed: 1280 rpm
An optional redundant fan can be installed on top
of the drive.
—
Table 8: Fan location and quantity
Standard
fan(s)
Number of
redundant
fans
2
1
Location Frame 1 Frame 2
Internal 1 1
External 0 1
External 1 1
Function
The fan unit is switched on by the control system of
the drive when the DC link is charged.
The fan runs continuously for a preset time after
the main power has been switched off to circulate
air that cools the drive components.
Air enters the front of the cabinet through
ventilation grills, passes through the
compartments and exits via the fan
out the top of the drive.
1 2
1 Ventilation grills
2 Phase modules
3 Fan
—
37
Circulating air cools the AFE/INU components (see
Figure 37) as it enters through the ventilation grills
(1), flows across each of the six phase modules (2),
travels along the rear wall of the compartment to
an access hole and exits to the fan (3).
The airflow across the phase modules is monitored
by an air pressure switch. If the filter mats are
clogged and the pressure drop reaches the
specified final pressure loss, the message
Conv1CoolAirFilter is displayed on the CDP control
panel and the alarm/fault pilot light on the control
compartment door illuminates.
Frame 3
1
2
1
3