TAR-4100L Automatic Recloser RCCB

Recloser (REC) Mechanism

The automatic reclosing mechanism operates on 220/240V AC at 50Hz with a power consumption of 30VA. The REC unit features toggle control and operates within 0.4 to 1.0 seconds of receiving a trip signal from the RCCB. The integrated auxiliary contact (1 NO + 1 NC) provides dry contact outputs rated for 250V / 2A, enabling remote monitoring, alarm signaling, or integration with building management systems.

RCCB Protection Characteristics

The electromechanical RCCB provides Type AC residual current protection with a rated sensitivity of 300mA (0.3A). This sensitivity level is optimized for equipment protection and fire prevention in circuits where higher leakage currents may occur during normal operation. The device is guaranteed not to trip at 0.5 × I∆n (150mA) and will reliably trip at the rated 300mA threshold.

With a rated breaking capacity (Im) of 500A and rated limited short-circuit current capability (Inc and I∆c) of 6kA, the TAR-4100L provides robust protection even under fault conditions. The 4-pole (3P+N) configuration ensures that the neutral is also switched, providing complete isolation when required.

Reclosing Logic

The reclosing program follows a sophisticated algorithm designed to balance power continuity with safety:

1. Initial Trip: RCCB detects residual current ≥300mA and trips
2. First Reclosing Attempt: After 10 seconds, REC closes the circuit
3. Subsequent Attempts: If tripping reoccurs, delays increase progressively (20s, 30s, 60s, 120s, 600s)
4. Lockout: After 6 unsuccessful attempts, device locks in open position
5. Manual Reset: Operator intervention required to restart reclosing program

This intelligent sequence allows transient faults (moisture, temporary insulation breakdown, surge-induced leakage) to clear naturally while preventing repeated energization of circuits with persistent dangerous faults.

Environmental Performance

The TAR-4100L is engineered for demanding environmental conditions, operating reliably across a temperature range of -35°C to +70°C and in relative humidity up to 93%. This makes it suitable for installations in harsh climates, outdoor enclosures, and industrial environments where temperature and humidity fluctuations are common.

Installation & Dimensions

The device mounts on standard 35mm DIN rail and occupies 130mm of panel width (approximately 7.2 modules). With a height of 82mm and depth of 76mm, it fits within standard distribution board enclosures. The IP20 degree of protection is appropriate for indoor panel mounting where the device is protected from direct water ingress and solid objects larger than 12.5mm.

• Residential Distribution Boards: Main incoming protection for homes where temporary earth leakage from appliances may cause nuisance tripping
• Commercial Buildings: Protection of critical circuits in offices, retail spaces, and public facilities where power continuity is important
• Pump Systems: Automatic reclosing for water pumps, irrigation systems, and sewage pumps that may experience moisture-related temporary faults
• Outdoor Installations: Remote equipment enclosures, outdoor lighting systems, and weatherproof installations prone to transient leakage
• Agricultural Applications: Farm equipment, livestock facilities, and irrigation control systems requiring automatic power restoration
• Light Industrial Facilities: Workshop circuits, machinery distribution, and equipment protection where downtime reduction is valuable
• Remote Monitoring Stations: Telecommunications equipment, weather stations, and unmanned facilities where manual reset is impractical
• HVAC Systems: Air conditioning and ventilation equipment that may experience temporary leakage during startup or in humid conditions
• Refrigeration Equipment: Cold storage facilities and commercial refrigeration where power interruption must be minimized
• Building Services: Elevators, escalators, and building automation systems requiring high availability