The HYCA-05 Residual Current Monitoring Unit, developed by Wenzhou Heyi Electrical Co., Ltd., is a high-precision safety monitoring device designed for modern electrical protection systems. Utilizing advanced AC/DC-sensitive detection technology, it simultaneously monitors both AC and DC residual currents, effectively preventing electric shock hazards and fire risks caused by insulation faults in electrical equipment.
Dual-Mode Detection Technology
Goes beyond traditional AC-only detection, employing innovative algorithms to precisely measure DC components (0–30mA range, ±0.5mA accuracy).
Ideal for modern applications such as EV charging stations where DC leakage poses significant risks.
Intelligent Self-Test System
Built-in automatic calibration via the TEST-IN pin for periodic zero-drift correction.
Internal fault simulation generates a 6.53mA DC test current to verify system reliability.
Dual digital outputs (X6-OUT/X30-OUT) provide cross-validation for accurate fault detection.
Industrial-Grade Reliability
Wide operating temperature range: -40°C to +85°C
High-altitude compatibility: Up to 4000m
Long service life: 20-year design lifespan
Compliant with IEC 62752 & IEC 62955 international standards.
Power Supply: Precision LDO voltage regulation (recommended IC: LP2985A-50DB), 4.85–5.15V DC input, static power consumption <110mW.
Current Monitoring: Supports 32A (typical) / 40A (max) three-phase primary conductors.
Safety Clearance: 10mm electrical clearance and creepage distance between primary and secondary circuits.
DC Leakage Detection:
S-DC trip threshold: 4.5mA (typical)
6mA response time: 100–1000ms
200mA fast response: 50–100ms
AC Leakage Detection:
30mA AC: No trip (∞)
150mA AC: Trips within 80ms
Smart Charging Safety Systems
DC leakage protection for EV charging stations.
Multi-point monitoring in charging station distribution cabinets.
PWM output (8kHz) for real-time current data transmission to Battery Management Systems (BMS).
Industrial Automation
Harmonic leakage detection in variable frequency drives (VFDs).
Insulation monitoring for photovoltaic (PV) systems.
Safety protection for medical equipment power supplies.
Smart City Infrastructure
E-bike charging stations.
Railway traction power systems.
Data center power distribution monitoring.
Modular Design
Standard PCB-mountable form factor (see product dimension diagram).
Includes reference schematic for easy integration.
PWM interface (3.33%/mA resolution) for real-time monitoring.
Timing Control Guidance
System stabilization time (T0): 270ms
Calibration cycle (T2): 50–100ms recommended
Output signal delay settings for reliable readings.
Fault Diagnostics
Error pin (open-drain output) for fault indication.
Hysteresis comparator design (55%–100% threshold range) prevents false triggering.
High noise immunity (≤150mV ripple tolerance).
RoHS/REACH compliant for environmental safety.
Manufactured in Yueqing, China, a hub for smart electrical components.
Comprehensive technical documentation & test reports available.
Customization support (trip threshold adjustment, interface expansion, etc.).
HEYI © All Rights Reserved.
