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M54123B

UTC
Part Number M54123B
Manufacturer UTC
Description EARTH LEAKAGE CURRENT DETECTOR
Published Oct 22, 2023
Detailed Description UNISONIC TECHNOLOGIES CO., LTD M54123B Advance EARTH LEAKAGE CURRENT DETECTOR LINEAR INTEGRATED CIRCUIT  DESCRIPTI...
Datasheet PDF File M54123B PDF File

M54123B
M54123B

Overview
UNISONIC TECHNOLOGIES CO.
, LTD M54123B Advance EARTH LEAKAGE CURRENT DETECTOR LINEAR INTEGRATED CIRCUIT  DESCRIPTION The UTC M54123B is a semiconductor integrated circuit with amplifier for a high-speed earth leakage circuit breaker.
For the amplifying parts of earth leakage circuit breaker, the UTC M54123B consists of differential amplifier, latch circuit and voltage regulator.
In normal operating, the UTC M54123B should be connected to the secondary side of the ZCT (zero current transformers).
Here the ZCT detects leakage current different amplifiers’ both input.
Then the signals which have been amplified are integrated by an external capacitor.
The integrated signal connects to the input terminal of latch circuit whose output is suitable for the characteristics of high- speed earth leakage circuit breaker.
Until the input voltage reaches the fixed level, latch circuit doesn’t become high.
Then drives a thyristor which is connected to latch circuit’s output terminal.
Once the t...


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