KA2803B: Earth Leakage Detector
Description: The KA2803B is designed for use in earth leakage c...
The KA2803B is designed for use in earth leakage circuit interrupters, for operation directly off the AC line in breakers. The input of the differential amplifier is connected to the secondary coil of ZCT (Zero Current Transformer). The amplified output of differential amplifier is integrated at external capacitor to gain adequate time delay specified in KSC4613. The level comparator generates a high level when earth leakage current is greater than the fixed level.
Low power consumption: 5mW, 100V/200V
Built-in voltage regulator
High-gain differential amplifier
0.4mA output current pulse to trigger SCRs
Low external part count
High noise immunity, large surge margin
Super temperature characteristic of input sensitivity
Wide operating temperature range: TA= -25°C to +80°C
Operation from 12V to 20V input
Building & home control
Technical Documentation & Design Resources