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R911335435伺服模塊
參數“CT空檔”的設置取決于主c.t的星點是否在線路側
母線側。因此，有兩種可能的設置總線“側”或“線側”。“線路側”選項用于選擇，前提是根據附錄中的接線圖。僅此設置適用于距離保護功能。事實并非如此
影響所有其他功能的功率方向，或A/D通道的顯示。啟動器（見第4.8.1節。）
距離函數提供了兩種啟動方法，即：。
過流或阻抗不足。選擇所需的方法通過在“啟動器”子菜單。
根據參數“DefDirMode”的設置起動機也可以在延時（Def）后自行跳閘。（見第3.5.31.4節。）
3.5.31.2.1.過電流啟動器（見第4.8.1.2節。）
通過選擇“OC”來啟用過電流啟動器參數“StartMode”。過電流的拾取電平啟動器由參數“Istart”的設置決定。
相應的設置范圍為0.5至10英寸，步驟如下：
0.01英寸。“Istart”的設置必須充分高于最大負載電流，以避免以下情況下的任何誤操作風險：正常負載條件。請注意，所有大于80%的電流
最高相電流（以及啟用電流“Imin”）由相位選擇函數考慮。
確定最大負載電流時，必須：認為在雙回路線路的情況下，負載電流IB可以
當一個電路為絆倒 E/F可能會在健康階段。同樣重要的是，過電流起動器具有
拾取，以可靠地重置最大負載電流IBmax，如果例如，故障由下游保護跳閘。
考慮到0.95的重置比率，最低允許設置由以下公式給出：最大設置（Istart）max由最小值導出
下一段線路末端故障的故障電流IK：（Istart）最大值
The setting of the parameter ‘CT neutral’ depends on
whether the star-point of the main c.t's is on the line side or
the busbar side. There are thus two possible settings ‘Bus
side’ or ‘Line side’. The ‘Line side’ option is the one to
choose, providing the protection is connected according to
the wiring diagram in the appendix. This setting only
applies to the distance protection function. It does not
influence the power direction in all the other functions or
the displays of the A/D channels.Starters
(see Section 4.8.1.)
The distance function provides for two methods of starting, i.e.
overcurrent or underimpedance. The desired method is selected
by appropriately setting the parameter ‘StartMode’ in the
‘STARTERS’ sub-menu.
Depending on the setting of the parameter ‘DefDirMode’, a
starter can also trip on its own after the time ‘Delay (Def)’. (see
Section 3.5.31.4.)
3.5.31.2.1. Overcurrent starters
(see Section 4.8.1.2.)
The overcurrent starters are enabled by selecting ‘OC’ for the
parameter ‘StartMode’. The pick-up level of the overcurrent
starters is determined by the setting of the parameter ‘Istart’.
The corresponding setting range is from 0.5 to 10 IN, in steps of
0.01 IN. The setting of ‘Istart’ must be sufficiently above the
maximum load current to avoid any risk of mal-operation under
normal load conditions. Note that all currents greater than 80%
of the highest phase current (and also the enabling current
‘Imin') are taken into account by the phase selection function.
When determining the maximum load current it must be
considered that
in the case of a double-circuit line, the load current IB can
briefly reach double its normal value when one circuit is
tripped
E/F's can cause additional balancing currents IA in the
healthy phases.It is equally important for an overcurrent starter, which has
picked up, to reliably reset at the maximum load current IBmax, if
for example the fault is tripped by a downstream protection.
Taking due account of the reset ratio of 0.95, the lowest permissible setting is given by:The maximum setting (Istart)max is derived from the minimum
fault current IK for a fault at the end of the next section of line:
(Istart)max
