1. Introduction
This manual provides essential information for the safe installation, operation, and maintenance of the Schneider Electric Acti 9 iC60 RCBO (Residual Current Circuit Breaker with Overcurrent protection), Model A9D27210. This device combines the functions of a miniature circuit breaker (MCB) and a residual current device (RCD) in a single unit, offering protection against overloads, short circuits, and earth leakage currents.
It is designed for use in electrical installations to ensure the safety of personnel and equipment. Please read this manual thoroughly before installation or use.
2. Safety Information
WARNING: Risk of electric shock or fire.
- Installation and maintenance must be performed by qualified and authorized personnel only.
- Always disconnect power before working on the device or electrical circuit.
- Ensure all local and national electrical codes and regulations are followed.
- Do not use the device if it is damaged or appears to be faulty.
- The device must be correctly rated for the circuit it protects.
Failure to follow these instructions can result in death, serious injury, or equipment damage.
3. Setup and Installation
The Acti 9 iC60 RCBO is designed for DIN rail mounting. Ensure adequate space and ventilation around the device.
3.1 Mounting
Mount the RCBO onto a standard 35mm DIN rail. Ensure it is securely clipped into place.

Figure 1: Side view of the RCBO, illustrating the DIN rail mounting mechanism. The yellow clips are visible, indicating how the device attaches to a standard DIN rail.
3.2 Wiring
Connect the incoming and outgoing cables to the appropriate terminals. This is a 2-pole device. Refer to the wiring diagram on the device label and ensure correct polarity and torque for terminal screws.
- Incoming Power: Connect to the top terminals (Line and Neutral).
- Outgoing Load: Connect to the bottom terminals (Line and Neutral).
- Ensure all connections are tight to prevent overheating and loose contacts.

Figure 2: Device label displaying the model number A9D27210 and a clear wiring diagram. This diagram indicates the correct connection points for incoming and outgoing power, as well as the internal schematic of the RCBO.

Figure 3: Bottom view of the RCBO, highlighting the wiring terminals. These terminals are where the load-side conductors are connected after the device is mounted.
4. Operating Instructions
The RCBO features a toggle switch for manual operation and a test button for verifying RCD functionality.
4.1 Switching On/Off
- To Switch On: Push the toggle switch upwards to the "ON" (I) position.
- To Switch Off: Push the toggle switch downwards to the "OFF" (O) position.
4.2 Test Function
The RCBO is equipped with a test button (marked "T" or "Test") to verify the residual current protection function. This test simulates an earth fault condition.
- Procedure: With the RCBO in the "ON" position, press the test button. The RCBO should immediately trip to the "OFF" position.
- Resetting: To reset, push the toggle switch fully down to the "OFF" position, then push it up to the "ON" position.
- Frequency: It is recommended to perform this test monthly to ensure proper operation of the RCD function.

Figure 4: Front view of the RCBO, clearly showing the green toggle switch for ON/OFF operation and the small test button (often labeled 'T' or 'Test') used to verify the residual current protection function.
5. Maintenance
The Acti 9 iC60 RCBO requires minimal maintenance. Regular testing of the RCD function is the primary maintenance task.
- Monthly Test: As described in Section 4.2, press the test button monthly to ensure the RCD mechanism is functioning correctly.
- Visual Inspection: Periodically inspect the device for any signs of physical damage, discoloration, or loose connections.
- Cleaning: If necessary, gently clean the exterior of the device with a dry, soft cloth. Do not use abrasive cleaners or solvents.
IMPORTANT: Do not attempt to open or repair the RCBO. Refer all servicing to qualified personnel.
6. Troubleshooting
If the RCBO trips unexpectedly or fails to operate correctly, consider the following:
| Problem | Possible Cause | Solution |
|---|---|---|
| RCBO trips immediately upon switching on. | Persistent earth fault, short circuit, or overload in the circuit. | Disconnect all loads and try to reset. If it holds, reconnect loads one by one to identify the faulty appliance/circuit. If it still trips, consult a qualified electrician. |
| RCBO trips intermittently. | Intermittent earth fault, transient overload, or faulty appliance. | Monitor the circuit for specific events that cause tripping. Check appliances for insulation faults. Consult a qualified electrician. |
| Test button does not trip the RCBO. | Faulty RCD mechanism or incorrect wiring. | Do not use the device. It may not provide earth fault protection. Immediately consult a qualified electrician for inspection and replacement if necessary. |
| RCBO does not reset after tripping. | Persistent fault in the circuit or internal device fault. | Ensure the toggle switch is pushed fully down to the "OFF" position before attempting to reset to "ON". If it still doesn't reset, there is likely a persistent fault or the device is damaged. Consult a qualified electrician. |
If troubleshooting steps do not resolve the issue, contact a qualified electrician or Schneider Electric customer support.
7. Specifications
The following specifications apply to the Schneider Electric Acti 9 iC60 RCBO, Model A9D27210:
| Feature | Value |
|---|---|
| Model Number | A9D27210 |
| Brand | Schneider Electric |
| Poles | 2P (2-Pole) |
| Rated Current | 10A |
| Rated Residual Operating Current | 30mA |
| Type | ASi (Type A-Si) |
| Voltage | 230 Volts |
| Mounting Type | DIN Rail Mount |
| Product Dimensions (L x W x H) | 7.8 x 3.6 x 8.6 cm |
| Weight | 270 grams |
| International Article Code (EAN/UPC) | 03606481157416 |

Figure 5: Product packaging displaying key specifications and model information for the Acti 9 iC60 RCBO.
8. Warranty and Support
Schneider Electric products are manufactured to high standards and are typically covered by a manufacturer's warranty. For specific warranty terms and conditions, please refer to the documentation provided with your purchase or visit the official Schneider Electric website.
For technical support, service, or further information, please contact Schneider Electric directly:
- Website: schneider-electric.com/contact
- Refer to the product packaging for regional contact details.





