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3BHL000389P0104可控硅模塊
E/F檢測(cè)器有三種可選的操作模式，通過(guò)參數(shù)設(shè)置選擇所需參數(shù)
“GndFaultMode”。E/F檢測(cè)可以基于測(cè)量中性電流單獨(dú)或與中性相結(jié)合
電壓第四種可能性是不測(cè)量接地回路即僅測(cè)量相-相回路。
這個(gè)以下備選方案可供選擇：阻塞（僅測(cè)量相間回路）I0
I0和U0 I0或U0。最高“3I0min”設(shè)置的標(biāo)準(zhǔn)為： E/F探測(cè)器必須拾取所有接地良好的E/F
系統(tǒng)和未接地系統(tǒng)或帶消弧線圈系統(tǒng)上的所有越野故障，前提是它們位于
低阻抗起動(dòng)器的范圍。最低“3I0min”設(shè)置的標(biāo)準(zhǔn)為：
E/F探測(cè)器不得拾取未接地的E/F
系統(tǒng)或具有消弧線圈的系統(tǒng)， E/F檢測(cè)器不得拾取相位故障，盡管c、 t.錯(cuò)誤可能導(dǎo)致假中性電流。
建議設(shè)置為“3I0min”=0.5 IN。
如果不可能找到滿足這兩個(gè)條件的設(shè)置在這些條件下，必須使用中性電壓（3U0min除中性電流外的測(cè)量。
3.5.31.2.5.相位優(yōu)先邏輯
越野故障所需的相位優(yōu)先邏輯為：借助參數(shù)“PhaseSelMode”進(jìn)行選擇。
在固體接地系統(tǒng)中，“相位模式”參數(shù)為通過(guò)將其設(shè)置為“固體接地”禁用。
不接地系統(tǒng)和帶消弧線圈系統(tǒng)中的所有繼電器必須設(shè)置為相同的相位偏好
思維方式因此，在選擇8個(gè)備選方案之一之前，必須知道系統(tǒng)中使用的邏輯：
RTS（R）循環(huán)欠壓起動(dòng)器（烏韋克）
欠壓起動(dòng)器與接通故障功能和轉(zhuǎn)換跳閘方案
灌封和推土不直接（見(jiàn)第3.5.31.7節(jié)）。與額定電壓相關(guān)的相應(yīng)拾取值設(shè)置為：
借助參數(shù)“Uweak”，其設(shè)置范圍為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.
