Product Specifications
| ABB Type Designation | NBRA-656C |
| Catalog Description | Braking chopper NBRA-656C |
| Customs Tariff Number | 85049099 |
| Product Net Weight | 2.8 kg |
| Product Net Depth / Length | 24 cm |
| Product Net Width | 21 cm |
Product Details
The NBRA-6xx Braking Choppers are optional devices for ACS 600Family frequency converters.The chopper connects the braking resistor to the intermediate circuit ofthe frequency converter whenever the voltage in the intermediatecircuit exceeds the maximum limit. The maximum limit is equal to 1.21 · 1.35 · Uon the chopper voltage selection (see Chapter 3 – Voltage Selectionand Mechanical Installation). With the selection 400V, Uwith the selection 500V, U(NBRA-66x), Uis 690V. Energy consumption by resistor losses1maxlowers the voltage until the resistor can be disconnected. This limit isequal to 1.19 · 1.35 · Ua fast deceleration of the drive typically causes the voltage to rise in theintermediate circuit. ◆ There is an enable input and a relay output on the chopper control board. The input can be connected to a temperature sensitive switch mounted in the resistor assembly to protect the resistor against over temperature . ◆ The relay output indicates chopper faults. ◆ The chopper can be controlled from an external control location via a fibre optic link. Using the link it is possible to synchronise several braking choppers. |
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Product Photos
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