RCCB VFL002B — Residual Current Circuit Breaker (Type B/B+)

Overview

The Kuangya VFL002B is an rccb type b designed for installations where smooth DC and mixed-frequency leakage can occur. Typical applications include EV charging points, PV inverters, UPS systems, drives with frequency converters, medical imaging (X-ray/CT), test benches, cranes, elevators, and variable-speed machinery. The B version covers AC + pulsating DC + smooth DC; the B+ variant extends the frequency response up to 20 kHz for modern power-electronics environments.

Detection & operation

• Type B — sensitive to sinusoidal AC, pulsating DC, and smooth DC residual currents.
• Type B+ — all B functions plus extended high-frequency behavior up to 20 kHz.
• Electronics — B/B+ functions are voltage-dependent with electronic control; A-class behavior is voltage-independent.

Key Features

• Poles: 2P / 4P; In: 16, 25, 32, 40, 63, 80, 100 A.
• IΔn (instantaneous): 30 / 100 / 300 / 500 mA.
• Ue (Un): 2P: 230/240 V AC; 4P: 400/415 V AC; fn: 50/60 Hz.
• Electronic supply: 50–264 V AC; test-circuit voltage range: 2P 184–264 V AC; 4P 184–440 V AC.
• Ui: 500 V; Uimp: 4 kV (1.2/50 μs).
• Inc (conditional short-circuit): 10 kA; Im (making/breaking): 1500 A.
• Surge withstand: 3 kA (8/20 μs); Selective S type withstands 5 kA.
• High-frequency behavior: up to 1 kHz (B) / up to 20 kHz (B+).
• Endurance (ops): ≥ 2000 electrical / ≥ 4000 mechanical.
• Terminals: open-mounted / lift type; cable and pin-type busbar; terminal protection IP20.
• Environment: −25 °C…+55 °C (daily avg ≤ 35 °C); storage −40 °C…+70 °C.
• Mounting: 35 mm DIN rail (EN 60715), fast clip; top or bottom supply; any mounting position.
• Standards/Approvals: IEC/EN 61008-1, OVE E8601; UKCA, CE.

Technical Data

Standard	IEC/EN 61008-1; OVE E8601
Model	VFL002B (Type B); VFL002B+ (Type B+)
Poles	2P, 4P
Rated voltage Ue (Un)	2P: 230/240 V AC; 4P: 400/415 V AC
Rated frequency fn	50/60 Hz
Electronic operation voltage	50–264 V AC
Voltage range (test circuit)	2P: 184–264 V AC; 4P: 184–440 V AC
Rated current In	16, 25, 32, 40, 63, 80, 100 A
Rated sensitivity IΔn	30 / 100 / 300 / 500 mA (instantaneous)
Insulation voltage Ui	500 V
Impulse withstand Uimp	4 kV
Conditional short-circuit Inc	10 kA
Making/breaking capacity Im	1500 A
Surge withstand	3 kA (8/20 μs); 5 kA (Selective S type)
High-frequency behavior	B: up to 1 kHz; B+: up to 20 kHz
Electrical isolation	> 4 mm contact gap
Back-up fuse (ref.)	gG/gL 100 A
Endurance	≥ 2000 electrical; ≥ 4000 mechanical operations
Terminal capacity	1–25 mm² (cable); busbar 0.8–2 mm
Terminal torque	2–2.5 N·m
Protection degree	IP20 (terminals)
Operating temperature	−25 °C…+55 °C (avg ≤ 35 °C)
Storage temperature	−40 °C…+70 °C
Mounting	DIN rail EN 60715 (35 mm); any position
Connection	Top or bottom
Approvals	UKCA, CE

Applications

• EV charging points and wallboxes requiring rccb type b sensitivity to smooth DC leakage.
• PV/UPS/inverter-driven systems, test benches, and medical imaging equipment.
• Industrial machinery with variable-speed drives and rectifiers.

Certifications

Conforms to IEC/EN 61008-1 and OVE E8601; approved UKCA and CE.

FAQ

When to choose B vs. B+?

Select B+ when the installation contains significant high-frequency components (up to 20 kHz); otherwise B is sufficient for AC, pulsating DC, and smooth DC leakage.

How to coordinate the conditional short-circuit rating?

Use an upstream SCPD so the installation respects Inc = 10 kA under fault conditions.