IS200BICMH1A处理器模块,模块控制器
抽出装置将标称控制电压指定为以下之一：确保施加的控制电压与抽出箱端子标签上的额定电压匹配。例如，HI电源将在90至300 V的直流电压或70至265 V的交流电压下工作。如果施加的电压超过此范围，内部保险丝可能会熔断。图2-11：控制电源连接469内置了广泛的滤波和瞬态保护，以确保在恶劣的工业环境中正常运行。瞬态能量必须通过滤波器接地端子传导回电源。为高压测试提供单独的安全接地端子。无论控制电源类型如何，必须连接所有接地以正常运行。LO：20至60 V DC 20至48 V AC HI：90至300 V DC 70至265 V AC警告2-10 469电机管理继电器GE电源管理2.2电气2安装2 2.2.4相电流输入469有三个相电流输入通道，每个通道都有一个隔离变压器。电流输入上没有内部接地连接。如果装置被撤回，469外壳上的各相CT电路会被自动机构短路。应选择相位CT，使FLA不小于额定相位CT一次的50%。理想情况下，应选择CT初级相位，以使FLA为CT初级相位的100%，或稍小，绝不超过。这将确保电流测量的最大精度。最大相CT一次电流为5000 A。469可正确测量相电流额定值的20倍。由于转换范围较大，订购时必须指定1 A或5 A CT次级，以确保装置中安装了适当的插入式CT。所选CT必须能够驱动469相CT负载（额定值见第1-5页第1.2节：规范）。验证1 A或5 A的469标称相电流是否与所连接CT的次级额定值和连接相匹配。不匹配的CT可能导致设备损坏或保护不足。相位CT的极性对于负序不平衡计算、功率测量和剩余接地电流检测（如果使用）至关重要。有关2相CT信息，请参见第B-1页附录B.1：两相CT配置。2.2.5接地电流输入469具有用于接地CT连接的双初级隔离变压器。接地电流输入上没有内部接地连接。如果取出装置，469外壳上的自动机构会使接地CT电路短路。1 A/5 A抽头用于零序/铁芯平衡应用或剩余接地连接，其中三相电流CT的总和通过接地电流输入（见下图）。1 A/5 A抽头的最大接地CT初级电流为5000 A。或者，50:0.025接地CT输入设计用于高电阻接地系统上的灵敏接地电流检测，其中使用GE Power Management 50:0.025芯平衡CT。例如，在必须测量漏电电流以确保人员安全的采矿应用中，GE Power Management 50:0.025 CT可检测到低至0.25 A的一次接地电流。给定装置上只能使用一个接地CT输入抽头。图2-12：剩余接地CT连接警告GE Power Management 469电机管理继电器2-11
drawout unit specifies the nominal control voltage as one of the following: Ensure applied control voltage and rated voltage on drawout case terminal label match. For example, the HI power supply will work with any DC voltage from 90 to 300 V, or AC voltage from 70 to 265 V. The internal fuse may blow if the applied voltage exceeds this range. Figure 2–11: CONTROL POWER CONNECTION Extensive filtering and transient protection are built into the 469 to ensure proper operation in harsh industrial environments. Transient energy must be conducted back to the source through the filter ground terminal. A separate safety ground terminal is provided for hi-pot testing. All grounds MUST be hooked up for normal operation regardless of control power supply type. LO: 20 to 60 V DC 20 to 48 V AC HI: 90 to 300 V DC 70 to 265 V AC CAUTION WARNING 2-10 469 Motor Management Relay GE Power Management 2.2 ELECTRICAL 2 INSTALLATION 2 2.2.4 PHASE CURRENT INPUTS The 469 has three channels for phase current inputs, each with an isolating transformer. There are no internal ground connections on the current inputs. If the unit is withdrawn, each phase CT circuit is shorted by automatic mechanisms on the 469 case. The phase CTs should be chosen so the FLA is no less than 50% of the rated phase CT primary. Ideally, the phase CT primary should be chosen such that the FLA is 100% of the phase CT primary or slightly less, never more. This will ensure maximum accuracy for the current measurements. The maximum phase CT primary current is 5000 A. The 469 correctly measures up to 20 times the phase current nominal rating. Since the conversion range is large, 1 A or 5 A CT secondaries must be specified at the time of order to ensure the appropriate interposing CT is installed in the unit. The chosen CTs must be capable of driving the 469 phase CT burden (see Section 1.2: SPECIFICATIONS on page 1–5 for ratings). Verify that the 469 nominal phase current of 1 A or 5 A matches the secondary rating and connections of the connected CTs. Unmatched CTs may result in equipment damage or inadequate protection. Polarity of the phase CTs is critical for Negative Sequence Unbalance calculation, power measurement, and residual ground current detection (if used). See Appendix B.1: TWO-PHASE CT CONFIGURATION on page B–1 for 2-phase CT information. 2.2.5 GROUND CURRENT INPUT The 469 has a dual primary isolating transformer for ground CT connection. There are no internal ground connections on the ground current inputs. The ground CT circuits are shorted by automatic mechanisms on the 469 case if the unit is withdrawn. The 1 A / 5 A tap is used either for zero-sequence/core balance applications or residual ground connections where the summation of the three phase current CTs is passed through the ground current input (see the figure below). The maximum ground CT primary current is 5000 A for the 1 A / 5 A tap. Alternatively, the 50:0.025 ground CT input has been designed for sensitive ground current detection on high resistance grounded systems where the GE Power Management 50:0.025 core balance CT is to be used. For example, in mining applications where earth leakage current must be measured for personnel safety, primary ground current as low as 0.25 A may be detected with the GE Power Management 50:0.025 CT. Only one ground CT input tap should be used on a given unit. Figure 2–12: RESIDUAL GROUND CT CONNECTION CAUTION GE Power Management 469 Motor Management Relay 2-11
