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CSH01.1C-SE-EN2-NNN-NNN-NN-S-XP-FW伺服驅動器
上述關系是否會導致（Istart）max較低超過（Istart）min時，必須使用低阻抗起動器
相反圖3.5.31.1顯示了低阻抗起動器的特性和相應的設置參數。參數'RLoad'和'AngleLoad'定義了允許的裝載區域。由于用于表示阻抗的方法處理器程序，不應設置阻抗設置
高于絕對必要的，否則將降低低阻抗。
起動器的最小允許范圍
起動裝置必須可靠地檢測到朝向的故障線路下一段的終點（備用區）。應該是備用的無需對相鄰線路段進行保護起動器必須設置為至少1.3倍
保護線路。在短線路的情況下，故障電阻成為需要考慮的因素。起動器的最大允許范圍
設置必須考慮到顯著增加雙電路正常電路的負載電流線路，當一個電路上的故障跳閘時。
確保單相的相位選擇正確自動重合閘，健康階段的啟動器不得
在其中一個相位上拾取E/F（盡管可能出現任何平衡電流）。
相應的極限可以數學表示為：
跟隨：堅固接地系統：E/F健康相的最低相電壓
單相（U=0.85 x最小系統電壓）。這個系數0.85考慮了可忽略的小零
序列源阻抗。
Uv最低相間系統電壓1.25安全系數
2系數，該系數考慮了使用相電流而不是相電流的事實。
這些要求通常可以毫無困難地滿足：
在大多數應用中。然而，第一個不平等不應該是如果滿足，則右側必須以向量表示，并且
與中的低阻抗啟動特性相比與設置“RLoad”等的關系。
在單相接地故障的情況下，必須檢查正常相位。
電流使能
在相位可以參與相位選擇之前，它必須傳導高于“Imin”的電流。建議設置為：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.
