ABB AX670 DCS programmable unit
DCV 700 can be tailored to meet differentneeds by using a combination of the
following options.
• Regenerative Stop
This type of emergency stop provides fast stop, stop by ramp,
coast stop and dynamic braking. An external push-button is
connected to a digital input and when activated it will force the
drive, with regenerative braking (fast stop), to stop and then
open the main contactor.
This function works with a hardware safety function that
insulates the motor from the network if there is a failure in the
drive.
• Electrical Disconnect (Coast Stop)
The electrical disconnect function opens all the main contac tors in the converter, allowing the drive to coast stop.
A pushbutton is connected to a digital input which will give the
order to the software to open the main contactor. This function
also includes a hardware safety function similar as for the
emergency stop.
• Auto Reclosing
If the AC mains supply is lost for a short time, the drive will
restart automatically. Technical data has to be specified in each
case.
• Earth Fault Protection (current sensitive)
Earth fault protection includes a zero measuring current
transformer and operates on the current summation principle.
In a direct earthed supply this protection will detect the first
earth fault and will disconnect the converter.
In an impedance earthed or an isolated system this protection
will detect the second earth fault provided that it is on opposite
sides of the current transformer.
• Insulation Monitor (voltage sensitive)
An insulation monitor for single drives or for system drives
can be provided for the detection of ground faults.
The insulation resistance is constantly monitored for the
system, and earth faults are detected for both AC and DC
circuits.
• Motor Starter
A motor starter can be provided for overload and short-circuit
protection of an external AC motor such as a motor cooling fan.
The AC voltage is the same as the drive´s supply voltage. The
following ratings are available: 400...690 V, 0.63 A...25 A
• Galvanic Isolation
Galvanic isolation is used for measuring of AC- and DC-voltage
with a transformer and a galvanic isolated transducer. This
option is recommended for supply voltages > 690 V (avail able for converter ratings 855...5150 A).
• Cabinet design according to EMC-regulations
Air inlet filters welded, bottom plate with cable entry, door

3-times bolted, fixing points of metal parts not painted, seal
ring in door frame of the cabinet is conductive.
• EMC Filters
- (25...700 A) Integrated in the drive cabinet
- (>700...2500 A) In separate cabinet next to drive cabinet
• Protection class IP20 - Standard
Air inlet in the door, air outlet vertically at top cover
(longitudinal slots 8 mm)
• Protection Class IP 21
Air inlet in the door (longitudinal slots 8 mm); air outlet same
as IP20 additional a hood - air outlet direction: 90° at the back
and at the front.
Options
• Protection Class IP 21 with insect screen (1×1 mm) in
air inlet
• Protection Class IP 21 with air inlet filters
When the converter is installed in a dirty environment it is
recommended that an air filter is installed to clean the
incoming air to the converter. These converters are then
provided with cabinet bottom plates.
• Protection Class IP 31 with filter in air inlet/outlet
• Protection Class IP 41 with filter in air inlet/outlet
• Gland plate and bottom plate
• Fire resistant bottom plate
• Special Colour (only outside) acc. to RAL standard
• Heater
If the converter is installed in a cold or humid environment, a
heater is required to prevent condensation when the converter
is not in operation. The heater (50 W) requires a supply voltage
of 230 V.
• Lightening
Cabinet lightening and door switch
• Incoming Supply Section for Line-ups
For system drives, where many converters are installed in a
line-up, an incoming cabinet is required for customer cable
connection and AC power distribution to all converters. This
incoming section can be provided with the following options:
- only busbars for cable connection and power distribution
- busbars as above and a mains isolation switch
- busbars as above and an air circuit breaker
FOR FURTHER INFORMATION REFER PAGES 12 AND 15.
• Horizontal Busbars
In the event that many converters are installed in a line-up, an
AC horizontal bus bar system can be supplied to feed the entire
line-up from the incoming supply section. Copper busbars
as standard, current ratings available 1000 A, 2000 A and
3000 A.