Conceptual
RP54123
Earth Leakage Current Detector
General Description
The RP54123 is a semiconductor integrated circuit with amplifier for a high-speed earth leakage circuit breaker. The RP54123 circuit for the amplifying parts of earth leakage circuit breaker consists of differential amplifier, latch circuit and voltage regulator. It is connected to the secondary side of the zero-current transformer (ZCT) which detects leakage current in the both input of the differential amplifier. Signals .
Earth Leakage Current Detector
Conceptual
RP54123
Earth Leakage Current Detector
General Description
The RP54123 is a semiconductor integrated circuit with amplifier for a high-speed earth leakage circuit breaker. The RP54123 circuit for the amplifying parts of earth leakage circuit breaker consists of differential amplifier, latch circuit and voltage regulator. It is connected to the secondary side of the zero-current transformer (ZCT) which detects leakage current in the both input of the differential amplifier. Signals amplified by differential amplifier are integrated by an external capacitor, and connects to the input terminal of latch circuit with output suitable for the characteristics of high-speed earth leakage circuit breaker. Latch circuit keeps low in the output till the input voltage reaches the fixed level, and output becomes high when the leakage current more than fixed flows. It drives a thyristor connected to the output terminal of latch circuit.
Features
Suitable for JIS C 8371 Good temperature characteristics of input sensitivity current High input sensitivity (VT = 6.1mV Typ) Low external component count High noise and surge-proof Low power dissipation (Pd = 5mW Typ) and may be used from 100V to 220V High mounting density by SIP package with 8 pins Wide temperature range (TA = -20°C to +80°C)
Pin Configurations
(TOP VIEW)
Application
High speed earth leakage circuit breaker
123 45678
VR IN GND OD SC NC OS VCC
Ordering Information
RP54123
Package Type S : SOP-8 I : SIP-8 V8: SO.