Item No.: LYL9-B

LYL9-B RCCB

Description：

scope of application
LYL9-Bresidual current operated circuit breaker
is suitable for AC 50Hz, rated voltage 240V for two
poles, 415V for four poles, rated current up to 63A,
used to detect AC leakage, pulsating DC leakage,
smooth DC leakage, compound wave leakage and
high frequency leakage current up to 1kHz.When
people come’to electric shock ‘or the leakage
current of the circuit exceeds the specified value,
it automatically cuts off the faulty’power supply
in a very short time to protect the safety of people
and electrical equipment. It can also be used for
infrequent switching operations in normal
condition.
Compliant with: IEC62423,IEC61008.
1,GB22794,GB16916.1

The LYL9-B RCCB is an enhanced residual current circuit breaker developed for higher stability and demanding commercial installations.

🔹 Key Technical Knowledge

Protection type: Residual current protection
Design focus: Enhanced electrical stability
Pole configuration: 2P / 4P
Installation: DIN rail mounting
Compliance: IEC 61008
Manufacturer role: OEM-ready RCCB factory

🔹 Why choose LYL9-B?

Improved performance under fluctuating load conditions
Suitable for commercial and semi-industrial environments
Consistent tripping accuracy over long service life

🔹 OEM & Manufacturing Advantage

We provide model differentiation, private labeling, and parameter customization to help distributors expand product lines.

🔹 Use Cases / Industries

Office and retail building electrical distribution
Residential power safety systems
Industrial control cabinets
Electrical panel builders & OEM integrators

FAQs

1. What is the LYL9-B RCCB used for?
The LYL9-B residual current circuit breaker is designed to protect AC power systems by detecting leakage currents and rapidly disconnecting circuits to prevent electric shock and equipment damage.

2. How is the LYL9-B different from the standard LYL9 model?
While the standard LYL9 offers basic leakage protection, the LYL9-B variant includes enhanced features (like higher stability or additional accessories) for improved performance in demanding installations.

3. What electrical specifications does the LYL9-B support?
It is suitable for AC 50 Hz systems, with rated voltages typically of 240V (2-pole) and 415V (4-pole) and rated current ranges matching common RCCB needs.

4. Why is fast residual current tripping important?
Rapid tripping minimizes the duration of dangerous leakage conditions, reducing the risk of electric shock and fire hazards, especially in populated or sensitive environments.

5. Can LYL9-B be used with infrequent switching of lines?
Yes, like most RCCBs, it supports infrequent line switching in addition to leakage protection.

6. Does this model support custom OEM orders?
Yes. As an experienced RCCB factory supplier, we provide OEM/ODM customization and bulk production options.