M54128L
DESCRIPTION
The M54128 is a semiconductor integrated circuit designed for high-speed type earth leakage breakers. This l C includes leakage and abnormal voltage detecting functions.
PIN CONFIGURATION (TOP VIEW)
GND 1
14 VS 13 VCC
FEATURES q lmprovement of ability against unwanted tripping due to Iightning -surge.
- Adopt the two times counting system.
- lmprovement of ability against needless action due to lightningimpulse. q lt is a possible that cope with l EC owing to mode change.
- Adopt the 1.5 times counting system. q High input impedance :
- Filter circuit can be formed with externally attached C/R.
- lmprovement of ability against needless action due to high frequency and high harmonics. q High input sensitivity : VT = 6.5m Vrms q Abnormal voltage detecting (neutral conductor open-phase protection) function :
- Neutral conductor open-phase protection at single-phase threewire system
- ln case of no use this function, stop this function and reduction of circuit current,...
