Bender NGRM700 Handbuch - Seite 7

Blättern Sie online oder laden Sie pdf Handbuch für Monitor Bender NGRM700 herunter. Bender NGRM700 8 Seiten. Neutral grounding resistor monitor (ngr)
Auch für Bender NGRM700: Schnellstart-Handbuch (8 seiten), Schnellstart-Handbuch (8 seiten), Schnellstart-Handbuch (8 seiten)

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Language (8.2)

Date (8.3)

Time (8.4)

Usys L-L (8.5)

Frequency (8.6)

INGR nom (8.7)

1. Setting the response values (menu 6.5)

• Trip threshold for voltage (U

• Trip threshold for current (I

• Trip threshold for resistance (R

Low trip threshold values: may lead to false tripping.

High trip threshold values: the device may not trip.

2. System settings of the relay -output modes (menu 6.6)

The factory setting for the relay outputs is fail-safe. The relays only change state when a test is

initiated if so configured.

Fail-safe: The relay is energised during normal operation and is de-energised in the event of a

fault ("fail-safe").

Non-fail-safe: The relay is de-energised in normal operation and is energised in the event of a

fault ("non-fail-safe").

3. Field calibration (menu 6.7)

After the parameters have been entered, a field calibration can be carried out to set R

4. Trip signal RMS, fundamental frequency, harmonics

The frequency response for neutral current and voltage trips or alarms can be selected via the

"Trip signal" parameter (menu 6.4.11). Trip signal can be:

• RMS: The r.m.s. value of I or U over the entire frequency range (up to approx. 3.8 kHz).

• Fundamental frequency: The r.m.s. value of the fundamental frequency component

(50 or 60 Hz) of I or U.

• Harmonics: The filtered r.m.s. value of the selected frequency range where

H0 = DC; H1 = fundamental frequency; H2 = 2 x fundamental frequency (second harmonic); ...

H32 = 32 x fundamental frequency (32nd harmonic)

In the "Harmonics" measured value display (menu 2) all frequencies are always displayed. This

is independent of the trip signal setting.

On the data measured values display (menu 1), the measured resistance can be shown in Ω or

% of nominal, and the measured current can be shown in A or % of nominal. (in A or %). The

selection is entered in "Display" (menu 5).

5. Initial measurement

During device start, all measured values are recorded.

Select

Set

System voltage

50 or 60 Hz

)

NGR

)

NGR

)

NGR

RNGR nom (8.8)

CT primary (8.9)

CT secondary (8.10)

CT connection (8.11)

Field calibration (8.12)

NGRM700_D00292_03_Q_XXEN/09.2019

NGRM700

50 mA or 5 A

Start or do not start

= R

NGR

NGR nom