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3BHL000389P0104可控硅模块
E/F检测器有三种可选的操作模式，通过参数设置选择所需参数
“GndFaultMode”。E/F检测可以基于测量中性电流单独或与中性相结合
电压第四种可能性是不测量接地回路即仅测量相-相回路。
这个以下备选方案可供选择：阻塞（仅测量相间回路）I0
I0和U0 I0或U0。最高“3I0min”设置的标准为： E/F探测器必须拾取所有接地良好的E/F
系统和未接地系统或带消弧线圈系统上的所有越野故障，前提是它们位于
低阻抗起动器的范围。最低“3I0min”设置的标准为：
E/F探测器不得拾取未接地的E/F
系统或具有消弧线圈的系统， E/F检测器不得拾取相位故障，尽管c、 t.错误可能导致假中性电流。
建议设置为“3I0min”=0.5 IN。
如果不可能找到满足这两个条件的设置在这些条件下，必须使用中性电压（3U0min除中性电流外的测量。
3.5.31.2.5.相位优先逻辑
越野故障所需的相位优先逻辑为：借助参数“PhaseSelMode”进行选择。
在固体接地系统中，“相位模式”参数为通过将其设置为“固体接地”禁用。
不接地系统和带消弧线圈系统中的所有继电器必须设置为相同的相位偏好
思维方式因此，在选择8个备选方案之一之前，必须知道系统中使用的逻辑：
RTS（R）循环欠压起动器（乌韦克）
欠压起动器与接通故障功能和转换跳闸方案
灌封和推土不直接（见第3.5.31.7节）。与额定电压相关的相应拾取值设置为：
借助参数“Uweak”，其设置范围为0以0.01。
There are three alternative operating modes for the E/F detector,
the desired one being chosen by the setting of the parameter
‘GndFaultMode’. E/F detection can be based on measurement
of the neutral current alone or in combination with the neutral
voltage. The fourth possibility is not to measure the ground loop
at all, i.e. only the phase-to-phase loop is measured. The
following alternatives are available for selection:
blocked (only measures the phase-to-phase loops)
I0
I0 AND U0
I0 OR U0.
The criterion for the highest ‘3I0min’ setting is:
the E/F detector must pick-up for all E/F's in solidly grounded
systems and for all cross-country faults on ungrounded systems or systems with Petersen coils, providing they lie within
the reach of the underimpedance starters.The criteria for the lowest ‘3I0min’ setting are:
the E/F detector must not pick up for an E/F on ungrounded
systems or systems with Petersen coils,
the E/F detector must not pick up for phase faults, although
c.t. errors can cause false neutral currents.
The recommended setting is ‘3I0min’ = 0.5 IN.
Should it not be possible to find a setting, which satisfies both
these conditions, the neutral voltage (3U0min) must be used for
measurement in addition to the neutral current.
3.5.31.2.5. Phase preference logic
(see Section 4.8.1.4.)
The desired phase preference logic for cross-country faults is
chosen with the aid of the parameter ‘PhaseSelMode’.
In solidly grounded systems, the ‘PhaseSelMode’ parameter is
disabled by setting it to ‘solid ground’.
It is essential for all the relays in ungrounded systems and systems with Petersen coils to be set to the same phase preference
logic. The logic in use in a system must therefore be known before one of the 8 alternative schemes can be selected:
RTS(R) cyclicUndervoltage starters
(Uweak)
The undervoltage starters are used in conjunction with the
switch-onto-fault function and the transfer tripping schemes
POTT and PUTT NONDIR (see Section 3.5.31.7.). The corresponding pick-up value is set in relation to the rated voltage with
the aid of the parameter ‘Uweak’, which has a setting range of 0
to 2 UN in steps of 0.01.
