1Class Digital Earth Leakage Detector (GD8-L05A, GD8-L05R) User’s Manual(V1.00)
10/17
Kyongbo Electric Co., Ltd
3. Functional Description
3.1
Construction
This ELD(GD8-L05A, GD8-L05R) is arithmetic type earth leakage detector, This have been
manufactured for the alarm activated when setting-current over detection.
Leakage detector input current signal(see appended 2) been the digitalization of current signal
through the 12 sampling after go through such as over input protection circuit, sample & hold,
multiplexer, and it measured the RMS current of fundamental frequency element through the
DFT(Discrete Fourier Transform), and it has no effect by harmonic and DC-offset.
3.2 Functions
Earth Dectecting Function
This element can be fire accident spread minimization through alarm on expectation
situation of fire accident when earth leakage occured on power system line of AC 600V or
less.
Metering Function
Displayed value display ZCT primary zero sequence current value input to ELD as a
current RMS display function.
Measurement Range
•
0 ~ 5A
•
Over 5A Current display 7-Segment as “HHH”
Measurement Accuracy
•
±
10%
