VDI7544B
对于电机必须快速减速且
内部制动电阻器无法吸收多余的制动能量。
操作期间，制动电阻器的温度可能超过250°C（482°F）。
监测
该装置监测制动电阻的功率。可以读取制动电阻器上的负载。
外部制动电阻器的输出受到短路保护。驱动器不监测接地
制动电阻故障。
外部制动电阻的选择
外部制动电阻器的额定值取决于所需的峰值功率和持续功率。
电阻R源自所需的峰值功率和直流母线电压。
R=电阻，单位为Ω
U=制动电阻V的开关阈值
Pmax=所需峰值功率（W）
如果两个或多个制动电阻器连接到一个驱动器，请注意以下标准：
 所有连接的再生电阻器的总电阻必须符合批准的电阻。
 制动电阻器可以并联或串联。仅将制动电阻器连接到
并联相同的电阻，以便将负载均匀分配给制动电阻器。
 所有连接制动电阻器的总持续功率结果必须大于或等于
所需的持续功率。
仅使用指定为制动电阻器的电阻器。有关合适的制动电阻器，请参阅第章
附件和备件（见第635页）。
外部制动电阻器的安装和调试
参数用于在内部制动电阻器和外部制动电阻器之间切换。
附件一章中列出的外部制动电阻器随附信息表
提供有关安装的详细信息。
警告
热表面
 确保不能与热制动电阻器接触。
 制动电阻器附近不允许有易燃或热敏零件。
 通过在大负载条件下进行试运行，验证散热是否充分。
不遵守这些说明可能导致死亡、重伤或设备损坏。

An external braking resistor is required for applications in which the motor must be decelerated quickly and the internal braking resistor cannot absorb the excess braking energy. The temperature of the braking resistor may exceed 250 °C (482 °F) during operation. Monitoring The device monitors the power of the braking resistor. The load on the braking resistor can be read out. The output for the external braking resistor is short-circuit protected. The drive does not monitor for ground faults of the braking resistor. Selection of the External Braking Resistor The rating of an external braking resistor depends on the required peak power and continuous power. The resistance R is derived from the required peak power and the DC bus voltage. R = Resistance in Ω U = Switching threshold for braking resistor V Pmax = Required peak power in W If 2 or more braking resistors are connected to one drive, note the following criteria:  The total resistance of all connected regenerative resistors must comply with the approved resistance.  The braking resistors can be connected in parallel or in series. Only connect braking resistors with identical resistance in parallel in order to evenly distribute the load to the braking resistors.  The total continuous power of all connected braking resistors result must be greater than or equal to the required continuous power. Use only resistors that are specified as braking resistors. For suitable braking resistors, see chapter Accessories and Spare Parts (see page 635). Mounting and Commissioning of an External Braking Resistor A parameter is used to switch between the internal braking resistor and an external braking resistor. The external braking resistors listed in the Accessories chapter are shipped with an information sheet that provides details on installation. WARNING HOT SURFACES  Ensure that it is not possible to make any contact with a hot braking resistor.  Do not allow flammable or heat-sensitive parts in the immediate vicinity of the braking resistor.  Verify that the heat dissipation is sufficient by performing a test run under maximum load conditions. Failure to follow these instructions can result in death, serious injury, or equipment damage.