Kyoritsu 5406A RCD Tester

Product Overview

The Kyoritsu 5406A is a high-precision RCD tester engineered to accurately measure RCD trip time and verify the correct operation of residual current protection devices. Powered by a custom microprocessor, it delivers reliable and repeatable test results while compensating for supply voltage fluctuations through constant current source circuitry.

The tester supports 0° and 180° phase angle testing, Auto Ramp functionality for determining actual trip current, and testing of Standard, Selective (S), AC, and Type A (DC-sensitive) RCDs. Three LED indicators provide instant wiring status verification, while the large digital display clearly shows measured trip times. Built to IP54 protection standards and compliant with IEC 61557, the 5406A is suitable for residential, commercial, and industrial electrical testing.

Key Features

• Custom microprocessor-controlled for high accuracy and reliability
• Tests Standard, Selective (S), AC, and Type A (DC-sensitive) RCDs
• Auto Ramp function for automatic trip current measurement
• Digital display of RCD tripping time
• 0° and 180° phase angle selection
• Constant current source ensures stable measurement accuracy
• Three LED indicators for correct wiring verification
• Visual indication of reversed phase and neutral wiring
• Large, easy-to-read LCD display
• IP54-rated dust and splash protection
• Complies with IEC 61557 standards
• Rugged design for professional field applications

Technical Specifications

• Model: Kyoritsu 5406A
• Instrument Type: RCD Tester
• Rated Tripping Current: 10, 20, 30, 200, 300, 500 mA
• Fault Condition Settings: ×½, ×1, ×5, DC Test, Auto Ramp
• Trip Current Duration: 1000 ms, 200 ms (×5)
• Trip Time Resolution: 1 ms
• Trip Time Accuracy: ±0.6% of reading ±4 digits
• Operating Voltage: 230 V AC (+10% / −15%), 50 Hz (195–253 V)
• Supported RCD Types: Standard, Selective (S), AC, Type A (DC-sensitive)
• Display: Large Digital LCD
• Wiring Check: Three LED indicators with reverse phase/neutral detection
• Protection Rating: IP54
• Safety Standard: IEC 61010-1 CAT III 300 V, Pollution Degree 2
• Compliance: IEC 61557-1, IEC 61557-6, IEC 61010-2-031, IEC 60529
• Dimensions: 167 × 186 × 89 mm
• Weight: Approximately 800 g
• Standard Accessories: Molded plug test lead, shoulder strap, carrying case, instruction manual