1. Introduction
The EARUELETRIC DZ30-32 DPN 1P+N Mini Circuit Breaker (MCB) is designed to provide essential protection for electrical circuits in household and similar installations. This device offers reliable short circuit and overload protection, ensuring the safety and longevity of your electrical system. This manual provides detailed instructions for the proper installation, operation, and maintenance of your DZ30-32 MCB.
2. Safety Information
WARNING: Installation and maintenance of this device should only be performed by a qualified electrician in accordance with all local and national electrical codes. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Always disconnect power at the main service panel before installing or servicing the circuit breaker.
- Ensure proper grounding and wiring according to local regulations.
- Do not operate the circuit breaker if it appears damaged or faulty.
- Verify the rated current and voltage of the circuit breaker match your application requirements.
- This device is designed for AC DPN (Double Pole with Neutral) systems.
3. Product Overview
The DZ30-32 MCB is a compact and efficient solution for circuit protection. It features a flame-retardant housing and clear markings for easy identification and wiring.
3.1 Key Features
- AC DPN (Double Pole with Neutral) type
- Short Circuit Protection
- Overload Protection
- Din Rail Mounting
- Available in various rated currents: 6A, 10A, 16A, 20A, 25A, 32A
- CE Certified
3.2 Components and Markings
As shown in Figure 1, the circuit breaker includes:
- Wiring Terminal: Points for connecting incoming and outgoing electrical wires.
- Rated Current: Indicated on the front (e.g., C16 for 16A).
- Execution Standards: Such as IEC60898-1, GB/T10963.1.
- Breaking Capacity: (e.g., 6000A).
- Flame Retardant Housing: For enhanced safety.
- Operating Handle: For manual switching (ON/OFF) and indicating trip status.
- Tighten Screws: For securing wire connections.
- Brand Name: EARU.
- Product Model: DZ30-32.
- Wiring Diagram: Illustrates the N (Neutral) and L (Live) connections.
3.3 Dimensions
Approximate dimensions are:
- Height: 72mm
- Width: 18mm
- Depth (overall): 60mm
- Back Depth (from mounting surface): 45mm
- Din Rail Height: 35mm
4. Specifications
| Parameter | Value |
|---|---|
| Product Series | DZ30-32 |
| Rated Voltage | AC230V |
| Mechanical Lifespan | 20,000 cycles |
| Compliant With Standards | IEC60898-1 |
| Function | Overload/short circuit protection |
| Product Characteristics | C type |
| Mounting | Rail mounted |
| Product Certification | CE |
| Breaking Capacity | 6000A |
4.1 Detailed Technical Data (IEC/EN 60898-1)
| Feature Category | Parameter | Value |
|---|---|---|
| Electrical features | Rated current In | 6A, 10A, 16A, 20A, 25A, 32A |
| Rated voltage Ue | 230/240V | |
| Insulation voltage Ui | 500V | |
| Rated frequency | 50/60 Hz | |
| Rated breaking capacity | 4000/6000A | |
| Rated impulse withstand voltage (1.2/50) Uimp | 4kV | |
| Dielectric test voltage at ind. freq. for 1 min | 2kV | |
| Pollution degree | 2 | |
| Energy limiting class | 3 | |
| Mechanical features | Electrical life | 8,000 cycles |
| Mechanical life | 20,000 cycles | |
| Contact position indicator | Yes | |
| Protection degree | IP20 | |
| Installation | Reference temperature for setting of thermal element | 30°C |
| Ambient temperature (with daily averages 35°C) | -5...+40°C | |
| Storage temperature | -25...+70°C | |
| Terminal connection type | Cable/Pin-type busbar | |
| Terminal size top/bottom for cable | 16 mm² (AWG 18-5) | |
| Terminal size top/bottom for busbar | 10 mm² (AWG 18-8) | |
| Tightening torque | 2 N·m (18 in-lbs) | |
| Mounting | On DIN rail EN 60715 (35mm) by means of fast clip device | |
| Combination with accessories | Connection | From top and bottom |
| Auxiliary contact | Yes | |
| Shunt release | Yes | |
| Under voltage release | Yes | |
| Alarm contact | Yes |
4.2 Trip Characteristics (Curves)
The DZ30-32 MCB is available with 'C' type trip characteristics. This means it will trip instantaneously at 5 to 10 times its rated current. For applications requiring different trip characteristics (e.g., 'B' type, which trips at 3 to 5 times rated current), please ensure you select the appropriate model.
4.3 Temperature Compensation
The maximum permissible current in a circuit breaker depends on the ambient temperature where the circuit breaker is placed. The reference temperature is 30°C. The following table shows temperature compensation coefficients:
| Temperature (°C) | Compensation Coefficient |
|---|---|
| -10 | 1.20 |
| 0 | 1.15 |
| 10 | 1.10 |
| 20 | 1.05 |
| 30 | 1.00 |
| 40 | 0.95 |
| 50 | 0.90 |
| 55 | 0.875 |
5. Installation and Setup
The DZ30-32 MCB is designed for easy installation on a standard 35mm DIN rail.
5.1 Mounting
- Ensure all power is OFF at the main supply.
- Locate a standard EN 60715 (35mm) DIN rail within your electrical panel.
- Position the circuit breaker onto the DIN rail. The fast clip device on the back of the breaker allows for quick and secure attachment.
- Press firmly until the breaker clicks into place.
5.2 Wiring
Refer to Figure 1 for the wiring diagram on the circuit breaker.
- Ensure all power is OFF.
- Connect the incoming Live (L) wire to the top terminal marked 'L' and the incoming Neutral (N) wire to the top terminal marked 'N'.
- Connect the outgoing Live (L) wire to the bottom terminal marked 'L' and the outgoing Neutral (N) wire to the bottom terminal marked 'N'.
- Ensure all wire connections are secure by tightening the screws to a torque of 2 N·m (18 in-lbs).
- Verify that the wire gauge is appropriate for the rated current of the circuit breaker (e.g., up to 16 mm² for cable, 10 mm² for busbar).
- Double-check all connections before restoring power.
6. Operation
The DZ30-32 MCB is operated via its red handle.
- ON Position: Push the handle upwards to the 'ON' position to close the circuit and allow current flow.
- OFF Position: Push the handle downwards to the 'OFF' position to open the circuit and stop current flow.
- Tripped Position: If an overload or short circuit occurs, the handle will automatically move to a central or 'tripped' position. This indicates that the breaker has interrupted the circuit to prevent damage.
6.1 Resetting a Tripped Breaker
- If the breaker trips, first identify and resolve the cause of the overload or short circuit (e.g., unplug faulty appliances, fix wiring issues).
- Push the handle fully to the 'OFF' position.
- Then, push the handle upwards to the 'ON' position to reset the breaker and restore power.
- If the breaker immediately trips again, do not force it. There is still an issue in the circuit that needs to be addressed.
7. Maintenance
The DZ30-32 MCB is designed for long-term, maintenance-free operation. However, periodic checks can help ensure continued reliability.
- Visual Inspection: Periodically inspect the circuit breaker for any signs of physical damage, discoloration, or loose connections.
- Cleanliness: Keep the area around the circuit breaker clean and free from dust and debris to ensure proper ventilation and operation.
- Connection Check: Occasionally, verify that the terminal screws are still tight. Loose connections can lead to overheating and potential hazards.
- Functionality Test: If your electrical panel allows for safe testing, you may periodically test the breaker by intentionally creating a controlled overload (e.g., by plugging in too many devices on a single circuit) to ensure it trips as expected. Always do this with caution and under supervision of a qualified person.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Circuit breaker trips frequently | Overload on the circuit, faulty appliance, short circuit | Reduce load on the circuit, inspect appliances for faults, check wiring for short circuits. Reset after resolving the issue. |
| Circuit breaker does not reset | Persistent fault (overload/short circuit), internal damage to breaker | Ensure the fault is cleared. If it still doesn't reset, the breaker may be damaged and needs replacement by a qualified electrician. |
| No power to circuit, breaker is ON | Loose wiring connection, fault in the circuit downstream, main power supply issue | Check wiring connections at the breaker and throughout the circuit. Verify main power supply. Consult a qualified electrician. |
| Breaker feels hot | Overload, loose connection, undersized wiring | Reduce load, check and tighten connections, ensure wiring is correctly sized for the load. If problem persists, consult an electrician. |
9. User Tips
- Characteristic Type: The DZ30-32 MCB is a 'C' type breaker, suitable for general applications. If your specific installation requires a 'B' type characteristic (for lower inrush currents), ensure you purchase the correct model.
- Proper Sizing: Always match the circuit breaker's rated current to the circuit's wire gauge and connected load to prevent nuisance tripping or inadequate protection.
- Professional Installation: For safety and compliance, it is highly recommended to have this circuit breaker installed by a certified electrician.
10. Warranty and Support
For warranty information, technical support, or service inquiries regarding your EARUELETRIC DZ30-32 Mini Circuit Breaker, please contact your point of purchase or the manufacturer directly. Ensure you have your product model number (DZ30-32) and any relevant purchase details available when seeking support.
11. Media Gallery
11.1 Product Overview Video
11.2 Additional Product Images
