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B10R4040-30-B IMO RCD 10KA, 30mA, Type B 3 Pole + N, 40 Amp, 415VAC
£405.54
Why Choose the IMO B10R4040-30-B Type B Residual Current Circuit Breaker?
The IMO B10R4040-30-B is a specialist Type B Residual Current Circuit Breaker (RCCB) designed to provide comprehensive earth leakage protection in modern commercial and industrial electrical installations. Manufactured by IMO Precision Controls, this four-pole RCCB monitors a three-phase plus neutral circuit and disconnects the electrical supply when residual current reaches its specified operating threshold.
Unlike Type AC and Type A devices, the B10R4040-30-B can detect sinusoidal AC, pulsating DC and smooth DC residual currents. This expanded detection capability makes it suitable for circuits containing frequency converters, variable speed drives, photovoltaic inverters, uninterruptible power supplies and other power-electronic equipment capable of producing complex leakage currents.
With a 40 A rated current, 30 mA rated residual operating current and four-pole configuration, the IMO B10R4040-30-B provides additional protection against electric shock in three-phase installations. Its modular DIN rail construction supports straightforward integration into distribution boards, machinery panels and industrial control systems.
Key Advantages
- Advanced four-pole Type B residual current protection.
- Detects AC, pulsating DC and smooth DC residual currents.
- 40 A rated current for three-phase commercial and industrial circuits.
- 30 mA sensitivity for additional protection against electric shock.
- Suitable for installations containing power electronics and frequency-controlled equipment.
- Compact DIN rail format for efficient installation within modular enclosures.
Key Features
- IMO B10R residual current circuit breaker series.
- 40 A rated current.
- 30 mA rated residual operating current (IΔn).
- Type B residual current characteristic.
- Three-phase plus neutral, four-pole configuration.
- Detection of sinusoidal alternating residual currents.
- Detection of pulsating DC residual currents.
- Detection of smooth DC residual currents.
- Suitable for circuits containing electronic power converters.
- Integrated test facility for routine operational checks.
- DIN rail mounting for modular distribution equipment.
- Requires separate overload and short-circuit protection.
Comprehensive Type B Earth Leakage Protection
A Type B RCCB continuously compares the current flowing through every live conductor in a circuit. When an imbalance indicates that current is leaking to earth, the device disconnects the supply. In addition to conventional alternating leakage currents, a Type B RCCB can respond to pulsating and smooth DC residual currents that may prevent less capable residual current devices from operating correctly.
The 30 mA operating sensitivity provides additional protection against electric shock, while the Type B characteristic makes the device suitable for selected installations incorporating three-phase power electronics. The correct RCCB type must always be confirmed against the connected equipment manufacturer’s instructions and the applicable wiring regulations.
Typical Applications
- Variable speed drive and frequency converter circuits.
- Industrial machinery with three-phase electronic drives.
- Photovoltaic inverter installations.
- Uninterruptible power supply systems.
- Industrial battery-charging equipment.
- Power conversion and automation systems.
- Commercial and industrial distribution boards.
- Circuits requiring 30 mA Type B residual current protection.
Technical Specifications
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| Voltage | 415 V | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 4-pole | |
| Device Type | RCD | |
| Residual Current | 30 mA | |
| RCD Type | Type B | |
| Manufacturer | IMO Precision Controls | |
| Series | B10R | |
| Model | B10R4040-30-B | |
| Product type | Type B Residual Current Circuit Breaker (RCCB) | |
| Rated current | 40 A | |
| Rated residual operating current | 30 mA | |
| Residual current characteristic | Type B | |
| Rated voltage | 400 V AC | |
| Rated frequency | 50/60 Hz | |
| Number of poles | 4 | |
| Pole configuration | 3 pole + neutral | |
| Detected residual currents | AC, pulsating DC and smooth DC | |
| Test facility | Integrated test button | |
| Mounting type | DIN rail | |
| Installation location | Distribution board or control panel | |
| Overcurrent protection | Separate protective device required | |
| HS Code | 8536201090 | |
| Country of Manufacture | China |
Frequently Asked Questions
What is the IMO B10R4040-30-B used for?
It provides residual current protection for three-phase plus neutral circuits that may produce alternating, pulsating DC or smooth DC earth leakage currents.
What does Type B mean on this RCCB?
Type B means the RCCB can detect sinusoidal AC, pulsating DC and smooth DC residual currents, including leakage associated with many power-electronic devices.
What is the rated current of the B10R4040-30-B?
The IMO B10R4040-30-B has a rated current of 40 A.
What residual current sensitivity does this model provide?
This model has a rated residual operating current of 30 mA, providing additional protection against electric shock when correctly selected and installed.
Why might a Type B RCCB be required instead of Type A?
A Type B RCCB may be required when connected equipment can generate smooth DC or higher-frequency residual currents that a Type A device is not designed to detect. Equipment manufacturers’ instructions should be checked before selecting the RCCB type.
Does the B10R4040-30-B provide overload protection?
No. It provides residual current protection only and must be used with an appropriately rated fuse or circuit breaker for overload and short-circuit protection.
Advanced Electrical Protection from IMO
IMO Type B residual current circuit breakers provide electrical contractors, panel builders and industrial engineers with advanced earth leakage detection for installations containing modern power-electronic equipment.
