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R911335435伺服模块
参数“CT空档”的设置取决于主c.t的星点是否在线路侧
母线侧。因此，有两种可能的设置总线“侧”或“线侧”。“线路侧”选项用于选择，前提是根据附录中的接线图。仅此设置适用于距离保护功能。事实并非如此
影响所有其他功能的功率方向，或A/D通道的显示。启动器（见第4.8.1节。）
距离函数提供了两种启动方法，即：。
过流或阻抗不足。选择所需的方法通过在“启动器”子菜单。
根据参数“DefDirMode”的设置起动机也可以在延时（Def）后自行跳闸。（见第3.5.31.4节。）
3.5.31.2.1.过电流启动器（见第4.8.1.2节。）
通过选择“OC”来启用过电流启动器参数“StartMode”。过电流的拾取电平启动器由参数“Istart”的设置决定。
相应的设置范围为0.5至10英寸，步骤如下：
0.01英寸。“Istart”的设置必须充分高于最大负载电流，以避免以下情况下的任何误操作风险：正常负载条件。请注意，所有大于80%的电流
最高相电流（以及启用电流“Imin”）由相位选择函数考虑。
确定最大负载电流时，必须：认为在双回路线路的情况下，负载电流IB可以
当一个电路为绊倒 E/F可能会在健康阶段。同样重要的是，过电流起动器具有
拾取，以可靠地重置最大负载电流IBmax，如果例如，故障由下游保护跳闸。
考虑到0.95的重置比率，最低允许设置由以下公式给出：最大设置（Istart）max由最小值导出
下一段线路末端故障的故障电流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
