DX3 Type A-S residual current circuit-breaker: Type A (AC and pulsating DC residual currents) with S delayed trip for discrimination; 2-pole 63-80 A, 4-pole 25-80 A. RCCBs provide fault current detection, measurement and cut-off, and isolation of an installation; they must be connected to a line protection device (circuit-breaker or fuse).

Key features

• Type A: sensitive to residual alternating currents and residual currents with a DC component
• Type S: delayed trip for discrimination with a downstream device
• Rated sensitivity 300 mA
• Test button for monthly testing

Applications

• Protection against earth leakage (direct and indirect contact), 30 mA sensitivity for protection against direct contact
• Fire-risk protection against leakage currents

Specifications

Rated Frequency: 50 / 60 Hz | Minimum Operating Voltage: 12 V AC | Minimum Operating Voltage for Test Button (phase-neutral): DP 170 V AC; FP 196 V AC | Rated Insulation Voltage Ui: DP 250 V AC; FP 500 V AC | Rated Impulse Withstand Voltage Uimp: 6 kV | Rated Conditional Short Circuit Current (Inc): 10000 A | Rated Conditional Residual Short Circuit Current (I∆c): 10000 A | Short-Circuit Withstand with DX MCB Upstream: 10 kA (2P: 16-100 A listed; 4P: 25-100 A listed) | Operating Temperature: -25 °C to +70 °C | Endurance - Mechanical: 20,000 cycles | Endurance - On Load (In x cos φ 0.9): 10,000 cycles | Endurance - Via Test Button: 2,000 cycles | Endurance - By Fault Current (sensitivity): 2,000 cycles | Testing: Press test button; grey dolly goes to OFF position; test once a month recommended | Fault Indication (earth leakage): Grey dolly goes to OFF position | Resetting: Switch on grey dolly | Terminals - Rigid: 1 - 35 sq mm | Terminals - Flexible: 1 - 25 sq mm | Type of Protection: Earth leakage (no overload or short-circuit protection) | Add-on Electrical Accessories: Auxiliary, fault signalling, shunt trip, under voltage, over voltage (mounted on left-hand side; max three at a time) | Number of Modules: DP 2; FP 4 | Type: A-S (Type A, S delayed/discriminating version) | Nominal Rating In - Double Pole: 63, 80 A | Nominal Rating In - Four Pole: 25, 40, 63, 80 A | Rated Sensitivity: 300 mA | Rated Operating Voltage Ue - Double Pole: 230 V AC | Rated Operating Voltage Ue - Four Pole: 400 V AC | Breaking Capacity: As per IS 12640 (Part 1):2008, IEC 61008-1 | Rated Making & Breaking Capacity (Im) - Up to 40 A: - | Rated Making & Breaking Capacity (Im) - 63 A and above: 630 A | Rated Residual Making & Breaking Capacity (I∆m) - Up to 40 A: - | Rated Residual Making & Breaking Capacity (I∆m) - 63 A and above: 1000 A

Standards: IEC 61008-1 | EN 61008-1