•
The resistance (
R
) of the brake resistor assembly must be equal to or above the value
specified. Never use resistance values below the specified value.
•
The resistor must withstand the specified brake cycles.
•
The ventilation of the space/room in which the resistors are located must meet the air
flow amounts specified.
•
The resistor assembly must be equipped with a thermal switch.
WARNING!
IEC 60664 and IEC 61800-5-1 require double or reinforced insulation between
resistor live parts and the sensor. If the resistor assembly does not fulfill the
requirement, the I/O terminals on the control unit must be protected against contact
and must not be connected to other equipment, or the temperature sensor must
be isolated from the I/O terminals, for example, with a suitable relay.
Selecting and routing the brake resistor cables
■
Typical resistor cable sizes
See the technical data.
■
Minimizing electromagnetic interference
Obey these rules in order to minimize the electromagnetic interference caused by rapid
current changes in the resistor cables:
•
Shield the braking power line completely, either by using shielded cable or a metallic
enclosure. Unshielded single-core cable can only be used if it is routed inside a cabinet
that efficiently suppresses radiated emissions.
•
Install the cables away from other cable routes.
•
Avoid long parallel runs with other cables. The minimum parallel cabling separation
distance is 0.3 meters (1 ft).
•
Cross the other cables at right angles.
•
Keep the cable as short as possible in order to minimize the radiated emissions and
stress on chopper IGBTs. The longer the cable, the higher the radiated emissions,
inductive load and voltage peaks over the IGBT semiconductors of the brake chopper.
■
Maximum cable length
See the technical data.
■
EMC compliance of the complete installation
Note:
ABB has not verified that the EMC requirements are fulfilled with external user-defined
brake resistors and cabling. The EMC compliance of the complete installation must be
considered by the customer.
Placing the brake resistors
Install the resistors outside the drive in a place where they will cool.
Arrange the cooling of the resistor in a way that:
•
no danger of overheating is caused to the resistor or nearby materials
46 Guidelines for planning the electrical installation
Содержание ACS880-604
Страница 1: ... ABB INDUSTRIAL DRIVES ACS880 604 3 phase brake units as modules Hardware manual ...
Страница 2: ......
Страница 4: ......
Страница 10: ...10 ...
Страница 34: ...Overview of kits 34 Cabinet construction ...
Страница 35: ...Stage 1 Installation of common parts Cabinet construction 35 10 ...
Страница 36: ...Stage 2A Installation of DC busbars 1 without DC switch or charging 36 Cabinet construction ...
Страница 37: ...Stage 2B Installation of DC busbars 1 with DC switch and charging Cabinet construction 37 10 ...
Страница 38: ...Stage 3 Installation of quick connector and outgoing resistor busbars cable connection 38 Cabinet construction ...
Страница 39: ...Stage 4 Installation of incoming resistor busbars cable connection Cabinet construction 39 10 ...
Страница 40: ...Stage 5 Installation of mounting plates and cable entries 40 Cabinet construction ...
Страница 41: ...Stage 6 Installation of support plate Cabinet construction 41 10 ...
Страница 42: ...Stage 7 Installation of shrouding 42 Cabinet construction ...
Страница 43: ...Stage 8 Installation of brake chopper module Cabinet construction 43 10 ...
Страница 44: ...44 ...
Страница 48: ...48 ...
Страница 56: ...56 ...
Страница 74: ...74 ...
Страница 76: ...76 ...
Страница 112: ...Frame R8i 112 Dimension drawings ...
Страница 113: ...Dimension drawings 113 ...
Страница 114: ...Control electronics BCU control unit 114 Dimension drawings ...
Страница 123: ...Miscellaneous components Quick connector for frame R8i Dimension drawings 123 ...
Страница 124: ...124 Dimension drawings ...
Страница 125: ... Insertion extraction ramp for frame R8i modules Dimension drawings 125 ...
Страница 126: ...126 Dimension drawings ...
Страница 127: ... CRBB 4 400 188 cooling fan 218 Dimension drawings 127 ...
Страница 128: ...128 Dimension drawings ...