| Descripción del artículo | Multiple electrical intelligent measurement and control device / gateway type multi-element electrical intelligent measurement and control device - SFE-11131-R - intelligent electrical digital series, with monitoring voltage and current 0-31ST harmonic component measurement function; Measurement and calculation functions for three-phase voltage, three-phase current, total active power, total reactive power, active and reactive power of each phase, power factor, power factor of each phase, system frequency, total active electricity, and total reactive electricity; Monitor the imbalance of each phase angle and implement intelligent statistics and analysis; 4-CHANNEL temperature monitoring, 1-CHANNEL residual current monitoring, 2-CHANNEL digital input, 2-CHANNEL relay output; Built in gateway function, supporting extended access for other devices; 2-CHANNEL RS485, 1-CHANNEL RJ45, supportin |