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The RDQ3NX Series CB Class Automatic Transfer Switch is a high-performance solution designed for applications requiring rapid fault response and reliable power transfer, ideal for industrial machinery, healthcare facilities, and emergency systems. Engineered with advanced circuit breaker technology and intelligent controls, this switch minimizes downtime while providing robust short-circuit protection.
Rapid Fault Response:
Ultra-fast circuit breaker trip time (≤10ms), interrupting short circuits up to 50kA at 480V, compliant with IEC 61009-1 for surge protection.
CB Class Type B certification with mechanical interlock, preventing parallel operation of utility and generator sources.
Adaptive Load Control:
Dynamic load sensing (0.1% accuracy) with auto-adjustable transfer delays, optimizing response to transient loads (e.g., motor starting, welding equipment).
Supports up to 400A (3-phase) or 200A (single-phase), with optional dual-breaker configuration for redundant load paths.
Smart Monitoring System:
4.3-inch touchscreen display for real-time fault data (voltage, current, trip history), with USB port for firmware updates and data logging.
IoT-enabled (optional LTE module), sending instant alerts via SMS/email for overcurrent, under-voltage, and transfer events.
Durable Construction:
Powder-coated steel enclosure (IP54), with nickel-plated copper bus bars (thickness ≥5mm), ensuring 20+ years of service in industrial environments.
Temperature-compensated trip settings (-20°C to +50°C), maintaining consistent protection across wide ambient conditions.
Critical for fault-sensitive systems, the RDQ3NX Series is used in:
Industrial Automation: Protects PLCs, HMIs, and servo drives from power surges, integrating with SCADA systems for predictive maintenance.
Hospital Emergency Systems: Powers elevators, nurse call systems, and medical gas pumps, compliant with NFPA 70 (NEC) Article 700 requirements.
Telecom Central Offices: Ensures uninterrupted power for switches, routers, and backup batteries, with ETL certification for telecom environments (NEBS Level 3).
Renewable Energy Projects: Provides fault protection in solar/wind hybrid systems, compatible with anti-islanding protection for grid-tied inverters.
Q: Does it support automatic generator start/stop?
A: Yes, built-in dry contacts trigger generator start when utility power is lost, with auto-stop after 30 minutes of stable utility recovery.
Q: What is the breaking capacity for DC systems?
A: Standard models for AC; DC versions (12V-600V) available with DC-rated circuit breakers (breaking capacity 20kA at 400V DC).
Q: Can the trip settings be customized?
A: Yes, adjustable via touchscreen for overload (1-10x rated current) and short-circuit (5-15x rated current) thresholds.
Technical and structure Features
RDQ3NX-63A/B/C/D series ATS comprised with two MCB and accessories, mechanical interlock transmission mechanism, build in intelligent controller, motorized operating mechanism etc.
It have 4 type controller, A type is basic type, B is intelligent type, C/D is improved type, it increased with three phase monitoring function based on A/B type, meanwhile the MCB inside the ATS have its original overload and short circuit protection functions.
Controller functions
| Type | RDQ3NX-A | RDQ3NX-B | RDQ3NX-C | RDQ3NX-D |
| Operating power | AC150-265V 50/60Hz | |||
| Installation mode | Integrated | |||
| Working position | Two position | Three position | Two position | Three position |
| Operation mode | Auto / Manual | |||
| Generator control | No | 5A relay contact | No | 5A relay contact |
| Fire-linkage | No | Yes | No | Yes |
| Transfer mode | Auto transfer auto recovery | Auto transfer auto recovery / Auto transfer no auto recovery / Grid-generator | Auto transfer auto recovery | Auto transfer auto recovery / Auto transfer no auto recovery / Grid-generator |
| Transfer delay | Fixed 0.2s | 0-30s adjustable | Fixed 0.2s | 0-30s adjustable |
| Recovery delay | Fixed 0.2s | 0-30s adjustable | Fixed 0.2s | 0-30s adjustable |
| Monitoring phase | A, N | A,B,C,N | ||
| Under voltage monitor | Yes | |||
| Utilization category | AC-33iB / AC-32B | |||
The RDQ3NX Series CB Class Automatic Transfer Switch is a high-performance solution designed for applications requiring rapid fault response and reliable power transfer, ideal for industrial machinery, healthcare facilities, and emergency systems. Engineered with advanced circuit breaker technology and intelligent controls, this switch minimizes downtime while providing robust short-circuit protection.
Rapid Fault Response:
Ultra-fast circuit breaker trip time (≤10ms), interrupting short circuits up to 50kA at 480V, compliant with IEC 61009-1 for surge protection.
CB Class Type B certification with mechanical interlock, preventing parallel operation of utility and generator sources.
Adaptive Load Control:
Dynamic load sensing (0.1% accuracy) with auto-adjustable transfer delays, optimizing response to transient loads (e.g., motor starting, welding equipment).
Supports up to 400A (3-phase) or 200A (single-phase), with optional dual-breaker configuration for redundant load paths.
Smart Monitoring System:
4.3-inch touchscreen display for real-time fault data (voltage, current, trip history), with USB port for firmware updates and data logging.
IoT-enabled (optional LTE module), sending instant alerts via SMS/email for overcurrent, under-voltage, and transfer events.
Durable Construction:
Powder-coated steel enclosure (IP54), with nickel-plated copper bus bars (thickness ≥5mm), ensuring 20+ years of service in industrial environments.
Temperature-compensated trip settings (-20°C to +50°C), maintaining consistent protection across wide ambient conditions.
Critical for fault-sensitive systems, the RDQ3NX Series is used in:
Industrial Automation: Protects PLCs, HMIs, and servo drives from power surges, integrating with SCADA systems for predictive maintenance.
Hospital Emergency Systems: Powers elevators, nurse call systems, and medical gas pumps, compliant with NFPA 70 (NEC) Article 700 requirements.
Telecom Central Offices: Ensures uninterrupted power for switches, routers, and backup batteries, with ETL certification for telecom environments (NEBS Level 3).
Renewable Energy Projects: Provides fault protection in solar/wind hybrid systems, compatible with anti-islanding protection for grid-tied inverters.
Q: Does it support automatic generator start/stop?
A: Yes, built-in dry contacts trigger generator start when utility power is lost, with auto-stop after 30 minutes of stable utility recovery.
Q: What is the breaking capacity for DC systems?
A: Standard models for AC; DC versions (12V-600V) available with DC-rated circuit breakers (breaking capacity 20kA at 400V DC).
Q: Can the trip settings be customized?
A: Yes, adjustable via touchscreen for overload (1-10x rated current) and short-circuit (5-15x rated current) thresholds.
Technical and structure Features
RDQ3NX-63A/B/C/D series ATS comprised with two MCB and accessories, mechanical interlock transmission mechanism, build in intelligent controller, motorized operating mechanism etc.
It have 4 type controller, A type is basic type, B is intelligent type, C/D is improved type, it increased with three phase monitoring function based on A/B type, meanwhile the MCB inside the ATS have its original overload and short circuit protection functions.
Controller functions
| Type | RDQ3NX-A | RDQ3NX-B | RDQ3NX-C | RDQ3NX-D |
| Operating power | AC150-265V 50/60Hz | |||
| Installation mode | Integrated | |||
| Working position | Two position | Three position | Two position | Three position |
| Operation mode | Auto / Manual | |||
| Generator control | No | 5A relay contact | No | 5A relay contact |
| Fire-linkage | No | Yes | No | Yes |
| Transfer mode | Auto transfer auto recovery | Auto transfer auto recovery / Auto transfer no auto recovery / Grid-generator | Auto transfer auto recovery | Auto transfer auto recovery / Auto transfer no auto recovery / Grid-generator |
| Transfer delay | Fixed 0.2s | 0-30s adjustable | Fixed 0.2s | 0-30s adjustable |
| Recovery delay | Fixed 0.2s | 0-30s adjustable | Fixed 0.2s | 0-30s adjustable |
| Monitoring phase | A, N | A,B,C,N | ||
| Under voltage monitor | Yes | |||
| Utilization category | AC-33iB / AC-32B | |||