Type B Residual Current Circuit Breaker with Overcurrent Protection (RCBO)

Type B RCBOs protect people and machines from direct current and high-frequency alternating current. Among the various RCBO types, Type B offers the highest level of protection.

1. Differential current sensitivity – UNIVERSAL

• AC pure sine wave fault current, 50/60 Hz
• A sinusoidal and pulsating direct current, 50/60Hz
• B: Alternating current + A + smooth direct current + high frequency (1 kHz)

2. Standards

• IEC/EN 61009-1 Basic standards for RCBOs Type AC and A
• IEC/EN 62423 Additional requirements for Type B

3. Typical applications

• Fault protection (protection against indirect contact with live parts)
• Additional protection (protection against direct contact with live parts, I∆n≤30mA)
• Fire protection (for places with fire hazard, I∆n≤300mA)

4.Which are susceptible to smooth DC fault currents?

• Photovoltaic systems, AC side.
• Charging stations for electric vehicles.
• Variable speed machine tools.
• UPS, computer data centers.
• Elevator control.
• Cranes of all kinds.
• Electronic devices on construction sites.
• Experimental setups in the laboratory.
• General installations where smooth DC fault currents are to be expected.

The maximum current of the EKL5-63 B type RCBO can reach 63 amps and three leakage current options of 30 mA, 100 mA and 300 mA are available to meet the needs of different scenarios.

Standards:IEC/EN61009-1, IEC/EN62423

Protective functions:Earth fault, overcurrent, short circuit, overvoltage (selectable)

Residual current type:Type B (alternating, pulsating and smooth DC residual currents)

Number of poles:1P+N (3-module), 3P+N (5-module), N-conductor switched separately

Rated current (In):6, 10, 16, 20, 25, 32, 40, 50, 63 A

Nominal voltage (Ue):1P+N: 230/240 V~; 3P+N: 400/415 V~

Nominal frequency:50/60 Hz

Residual current sensitivity (IΔn):10, 30, 100, 300 mA

DC tripping threshold (IΔdc):(0.5–2) × IΔn

Switch-off time at IΔn:≤ 0.1 s

IΔm – Rated residual current making/breaking capacity:500A (In ≤ 50A), 10In (In > 50A)

Rated switching capacity:10,000 A

Energy limitation class:3

Surge voltage withstand voltage (Uimp, 1.2/50 μs):4,000 V

Insulation test voltage (1 min):2 kV

Thermal tripping characteristics:(1.13–1.45) × In

Magnetic triggering characteristics:B: (3-5) × In, C: (5-10) × In, D: (10-20) × In

Electrical life:4,000 cycles

Mechanical life:10,000 cycles

Contact position indicator:Yes

Earth fault indication:Yes

Protection class:IP20

Ambient temperature:-25 °C to +55 °C, max. 95% humidity

Storage temperature:-25 °C to +70 °C

Terminal type:Cable / pin busbar

Max. conductor cross-section:25 mm²

Max. tightening torque:2.5 Nm

Assembly:On 35 mm DIN rail

Connection:From above