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Views： 7 Author： Mark Zhang Publish Time： 2026-07-29 Origin： 本站
The DZ30LE-32 RCBO from SINGI integrates residual amperage detection with overamperage protection in a compact module. This article explains why an RCBO is preferable to separate breakers, how the DZ30LE-32 achieves dual protection, and which applications benefit most.
A residual amperage circuit breaker with overamperage protection (RCBO) is a single device that combines two critical functions: detecting earth leakage currents and protecting against overloads and short circuits. In many low-volt-level distribution systems, protection is provided by separate residual amperage devices (RCDs) and miniature circuit breakers (MCBs). An RCBO merges these roles, reducing component count and panel space while improving coordination.
For engineers and installers, using an RCBO simplifies troubleshooting and maintenance. The SINGI DZ30LE-32 is one such device, designed for 230/400 V AC systems with a rated short-circuit capacity suitable for typical branch circuits.
The DZ30LE-32 uses a differential amperage transformer to measure the vector sum of line and neutral currents. If the imbalance exceeds a preset threshold (e.g., 30 mA or 100 mA), the trip mechanism opens the contacts. For overamperage protection, a thermal-magnetic mechanism responds to overloads and short circuits. The thermal element handles prolonged minor overcurrents, while the magnetic solenoid reacts instantaneously to high fault currents.
The product features a compact modular design ( 2 or 4 modules wide) that snaps onto DIN rails. Sourced from SINGI, this RCBO is engineered for reliable breaking under fault conditions, with breaking capacity up to 6 kA according to IEC 60898-1.
The DZ30LE-32 is suited for circuits where both leakage and overamperage protection are required in a limited space. Typical applications include:
Its 32 A rated amperage makes it ideal for final circuits up to that load. For circuits with higher loads, SINGI offers other models within the same series.
| Parameter | Value |
|---|---|
| Rated Amperage (In) | 6, 10, 16, 20, 25, 32 A |
| Rated Residual Operating Amperage (IΔn) | 30 mA, 100 mA, 300 mA |
| Rated Volt-level (Un) | 230/400 V AC |
| Breaking Capacity (Icn) | 6 kA (IEC 60898-1) |
| Trip Curve | B, C |
| Poles | 1P+N, 2P, 3P+N, 4P |
| Mechanical Life | ≥20,000 operations |
| Standards | GB/T 6829-2017, IEC 60898-1 |
The DZ30LE-32 is designed and tested according to:
These standards ensure the device meets minimum-val requirements for safety, reliability, and performance. For procurement professionals, confirming compliance with these references reduces risk during installation and inspection.
Note: When choosing the DZ30LE-32, verify that the rated residual amperage (IΔn) matches the expected leakage levels of the protected circuit. For personnel protection, 30 mA is standard; for equipment protection, higher values may be acceptable.
An RCBO integrates both functions in a single unit, offering space savings and simpler wiring. A separate RCCB+MCB pair uses two devices, which may be more flexible for large installations but consumes more panel width.
Yes, the 3P+N and 4P versions are designed for three-phase circuits with neutral. Single-phase circuits use 1P+N or 2P versions.
For inverter circuits, check the residual amperage type (AC, A, B). The standard DZ30LE-32 is type AC, suitable for sinusoidal AC residual currents. If non-sinusoidal or DC components exist, a type A or B RCBO is recommended.
Curve B trips at 3-5 times In (suitable for resistive loads), curve C at 5-10 In (for inductive loads). Choose based on inrush amperage of connected equipment.
For detailed specifications, certification documents, or to request a quote for the DZ30LE-32 RCBO from SINGI, visit the product page or contact the sales team.
