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140CPS21400电源模块
额定值表标准制动斩波器、制动电阻、电缆和保险丝表2-1和2-2中规定。（另见第4章-电气安装。）
ACS 600/NBRA-6xx组合的最大制动功率给出了参考制动循环（驱动制动器制动一分钟每十分钟）。如果实际循环与参考循环，最大允许制动功率必须为计算参见附录B-最大制动功率说明。1.计算电机在制动。
2.选择合适的ACS 600*/制动斩波器/制动电阻
应用程序的组合。必须满足以下条件：PBR最大值>P最大值PBRmax见表2-1和表2-2。表中的PBRmax值为为参考制动循环规定（制动1分钟，制动9分钟rest）。如果实际占空比与参考循环不对应，则必须使用最大允许制动功率PBR。见附录B-用于计算PBR的最大制动功率。
3.检查电阻器选择。电机产生的能量在400秒的时间内，不得超过电阻器的热量耗散能力ER（见表2-1和表2-2）。
如果ER值不够，可以使用四电阻组件，其中两个标准电阻器并联，两个串联。的ER值四电阻组件是标准电阻指定值的四倍。
注：可以使用标准电阻器以外的电阻器。
但是，必须满足以下条件：•电阻器电阻值不得低于标准电阻器电压选择必须在制动斩波器安装。根据电源电压设置电压斩波器控制板上的跳线。（切碎器前盖必须拆下才能接触跳线。）本章包含制动斩波器电压选择说明和机械安装说明。电压选择本章第一页介绍了NBRA-6xx。
程序所有的直升机都是一样的。机械安装说明如下从第3-3页开始，针对每种斩波器类型分别给出。如果连接了两个（或更多）斩波器，则使用光纤位置同一中间电路，必须同步。一个切碎器–链条中的第一个–充当其他直升机的主人。
这个主设备的电压选择跳线设置为适当的电压，而从设备设置为FIBER。安装现场NBRA-653/663防护等级为IP54。必须考虑这一点选择安装位置时。
还应注意以下限制：•在制动斩波器的下方和上方留出150 mm的自由空间。
•为防止斩波器过热，请勿安装斩波器制动电阻正上方。
•在ACS 600装置下方和上方留出300 mm的自由空间。
•斩波器和电阻器电缆的最大长度为5 m分别为10m和10m。
安装说明适用于NBRA-653/663
•确保斩波器电压水平设置正确（见第3-1页）。
•检查预定安装地点是否有足够的空间。标记四个孔的位置。
•在四个位置钻孔。确保钻孔产生的灰尘不进入正在安装的设备或其他设备安装地点。
•将螺钉插入孔中。必要时使用塞子。
•将切碎器提升到墙上的螺钉上。
•拧紧螺钉。
Rating Tables
The standard braking choppers, braking resistors, cables and fuses are specified in Tables 2-1 and 2-2. (See also Chapter 4 – Electrical Installation.) The Maximum Braking Power of the ACS 600 / NBRA-6xx combination is given for a reference braking cycle (the drive brakes for one minute every ten minutes). If the actual cycle does not correspond to the reference cycle, the maximum allowed braking power must be calculated. See Appendix B – Maximum Braking Power for instructions.
Calculate the maximum power (Pmax) generated by the motor during braking. 2. Select a suitable ACS 600* / braking chopper / braking resistor combination for the application. The following condition must be met: PBRmax > Pmax See Table 2-1 and Table 2-2 for PBRmax. The PBRmax values in the tables are specified for the reference braking cycle (one minute of braking, nine minutes of rest). If the actual duty cycle does not correspond to the reference cycle, the maximum allowed braking power PBR must be used instead. See Appendix B – Maximum Braking Power for the calculation of PBR . 3. Check the resistor selection. The energy generated by the motor during a 400-second period must not exceed the resistor heat dissipation capacity ER (see Table 2-1 and Table 2-2). If the ER value is not sufficient, it is possible to use a four-resistor assembly in which two standard resistors are connected in parallel, two in series. The ER value of the four-resistor assembly is four times the value specified for the standard resistor. Note: A resistor other than the standard resistor can be used. However, the following conditions must be met: • Resistor resistance value must not be below the resistance value of the standard resistor
Voltage Selection
The voltage level must be selected before the braking chopper is mounted. The voltage is set, according to the mains voltage, with a jumper on the chopper control board. (The front cover of the chopper has to be removed to access the jumper.)This chapter contains braking chopper voltage selection instructions and mechanical installation instructions. The voltage selection for the NBRA-6xx is described on the first page of the chapter. The procedure is the same for all the choppers. Mechanical installation instructions are given separately for each chopper type starting from page 3-3.The FIBER position is used if two (or more) choppers are connected to the same intermediate circuit and must be synchronised. One chopper – the first in the chain – acts as the master for the other choppers. The voltage selection jumper of the master is set to the appropriate voltage, while the slaves are set to FIBER.
Installation Site
The NBRA-653/663 is protected to IP54. This must be considered when selecting the installation site. The following restrictions should also be noted: • Leave 150 mm free space below and above the braking chopper. • To prevent the chopper overheating, do not mount the chopper directly above the braking resistor. • Leave 300 mm free space below and above the ACS 600 unit. • The maximum lengths of the chopper and resistor cables are 5 m and 10 m respectively. Mounting Instructions for NBRA-653/663 • Ensure that the chopper voltage level is set correctly (see page 3-1). • Check the intended installation site for sufficient room. Mark the locations for the four holes. • Make holes in the four positions. Make sure the dust from drilling does not enter the unit you are installing or other equipment at the installation site. • Insert screws in the holes. Use plugs if necessary. • Lift the chopper onto the screws on the wall. • Tighten the screws.
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