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CSH01.1C-SE-EN2-NNN-NNN-NN-S-XP-FW伺服驱动器
上述关系是否会导致（Istart）max较低超过（Istart）min时，必须使用低阻抗起动器
相反图3.5.31.1显示了低阻抗起动器的特性和相应的设置参数。参数'RLoad'和'AngleLoad'定义了允许的装载区域。由于用于表示阻抗的方法处理器程序，不应设置阻抗设置
高于绝对必要的，否则将降低低阻抗。
起动器的最小允许范围
起动装置必须可靠地检测到朝向的故障线路下一段的终点（备用区）。应该是备用的无需对相邻线路段进行保护起动器必须设置为至少1.3倍
保护线路。在短线路的情况下，故障电阻成为需要考虑的因素。起动器的最大允许范围
设置必须考虑到显著增加双电路正常电路的负载电流线路，当一个电路上的故障跳闸时。
确保单相的相位选择正确自动重合闸，健康阶段的启动器不得
在其中一个相位上拾取E/F（尽管可能出现任何平衡电流）。
相应的极限可以数学表示为：
跟随：坚固接地系统：E/F健康相的最低相电压
单相（U=0.85 x最小系统电压）。这个系数0.85考虑了可忽略的小零
序列源阻抗。
Uv最低相间系统电压1.25安全系数
2系数，该系数考虑了使用相电流而不是相电流的事实。
这些要求通常可以毫无困难地满足：
在大多数应用中。然而，第一个不平等不应该是如果满足，则右侧必须以向量表示，并且
与中的低阻抗启动特性相比与设置“RLoad”等的关系。
在单相接地故障的情况下，必须检查正常相位。
电流使能
在相位可以参与相位选择之前，它必须传导高于“Imin”的电流。建议设置为：0.2英寸。
Should the above relationships result in (Istart)max being lower
than (Istart)min, the underimpedance starters must be used
instead.The characteristic of the underimpedance starters and the corresponding setting parameters can be seen from Fig. 3.5.31.1.
The parameters ‘RLoad’ and ‘AngleLoad’ define the permissible
load area.Because of the method used to represent impedances by the
processor program, the impedance settings should not be set
higher than absolutely necessary, otherwise the resolution for
low impedances will be reduced.
Minimum permissible reach of the starters
The starting units must reliably pick-up for a fault towards the
end of the next section of line (back-up zone). Should back-up
protection of the adjacent section of line not be necessary, the
starters must be set to at least 1.3 times the impedance of the
protected line. In the case of short lines, fault resistance becomes a factor to be taken into account.
Maximum permissible reach of the starters
The setting must take account of the considerable increase
in the load current of the healthy circuit of a double-circuit
line, when a fault on one circuit is tripped.
To ensure that the phase selection is correct for single-phase
auto-reclosure, the starters in the healthy phases must not
pick up for an E/F on one of the phases (in spite of any balancing currents which may occur).
The corresponding limits can be expressed mathematically as
follows:
Solidly grounded systems lowest phase voltage of the healthy phases for an E/F
on one phase (U = 0.85 x min. system voltage). The
factor 0.85 takes account of a negligibly small zero
sequence source impedance.
Uv lowest phase-to-phase system voltage
1.25 safety factor
2 factor which takes account of the fact that phase currents and not phase-to-phase currents are used.
These requirements are generally fulfilled without difficulty for
most applications. Should, however, the first inequality not be
satisfied, the right-hand side must be expressed vectorially and
compared with the underimpedance starting characteristic in
relation to the setting ‘RLoad’ etc.
The healthy phases must be checked for the case of a singlephase-to-ground fault.
Current enable
Before a phase can take part in phase selection, it must be conducting a current higher than ‘Imin’. The recommended setting is
0.2 IN.
