Heschen HSB6C-DC Miniature Circuit Breaker User Manual

1. Introduction

This manual provides essential information for the safe and effective installation, operation, and maintenance of the Heschen HSB6C-DC Miniature Circuit Breaker. This device is specifically designed for direct current (DC) applications, such as photovoltaic (PV) solar power systems, offering reliable overcurrent protection.

The HSB6C-DC is a 2-pole circuit breaker rated for DC500V and 32A, featuring a breaking capacity of 4.5KA. It is non-polarized and designed for 35mm DIN rail mounting, making it suitable for various solar panel and grid systems.

Figure 1: Front view of the Heschen HSB6C-DC Miniature Circuit Breaker, showing its two poles, Heschen branding, model number HSB6C-DC, C32 rating, DC500V, IEC60898-2 standard, 4500A breaking capacity, CE mark, and ON/OFF indicators with toggle switches.

2. Safety Information

WARNING: Before powering on the device, ensure that the wiring is correct to avoid any potential hazards. Incorrect wiring can lead to electric shock, fire, or damage to equipment.

Always disconnect power before installing or servicing the circuit breaker. Only qualified personnel should perform electrical installations and maintenance. Adhere to all local and national electrical codes and regulations.

Figure 2: Product packaging displaying multi-language warnings, emphasizing the importance of correct wiring before powering on the device to prevent potential hazards.

3. Product Features

• Current Rating: 32 Amperes
• Rated Voltage: DC500 Volts
• Breaking Capacity: 4.5 Kiloamperes (KA)
• Pole Number: 2 Poles
• Type: C-type tripping characteristic
• Polarity: Non-polarized design for flexible installation
• Mounting: 35mm DIN Rail Mount

4. Technical Specifications

Figure 3: Detailed dimensions of the HSB6C-DC circuit breaker, showing measurements in both inches and millimeters for length, width, and height, and indicating TH35 for DIN rail compatibility.

Figure 4: Comprehensive table detailing various electrical parameters including rated current, rated insulation voltage, rated voltage, main contacts configuration, controlled power (kW), wiring ability (mm²), and fastening torque for different current ratings.

5. Installation

5.1 Package Contents

• 1 x DC Miniature Circuit Breaker (HSB6C-DC)

Figure 5: Front view of the product packaging box, indicating 'Heschen', 'Type: HSB6C-DC', 'Current:', 'Pole: 2P', and 'Qty: 1pcs'.

5.2 Mounting

The HSB6C-DC circuit breaker is designed for 35mm DIN rail mounting. Ensure the DIN rail is securely fastened within your electrical enclosure.

1. Align the circuit breaker's mounting clips with the DIN rail.
2. Press the circuit breaker firmly onto the DIN rail until it clicks into place.
3. Verify that the circuit breaker is securely attached and does not wobble.

Figure 6: Side view of the circuit breaker, highlighting the integrated DIN rail mounting clip at the bottom, designed for quick and secure installation onto a standard 35mm DIN rail.

Figure 7: Close-up view of the circuit breaker's mounting clips, illustrating how they engage with the DIN rail for secure attachment. The image shows the top and bottom clips designed for easy installation and removal.

5.3 Wiring

The HSB6C-DC is a non-polarized circuit breaker, meaning the input and output terminals do not have a fixed polarity. This allows for flexible wiring configurations in DC systems.

1. Ensure all power sources are disconnected before wiring.
2. Connect the DC positive (+) and negative (-) wires to the appropriate terminals of the circuit breaker. Refer to the wiring diagrams below.
3. Tighten the terminal screws securely. Use a manual screwdriver for tightening; power tools are not recommended to avoid overtightening and damaging the terminals.

Figure 8: Wiring diagrams illustrating the non-polarized nature of the HSB6C-DC circuit breaker. Diagram A shows the internal schematic and various connection possibilities for L+ and L- to the load. Diagram B provides simplified connection examples.

Figure 9: Illustration showing the recommended tool for tightening terminal screws (a manual screwdriver) and an unrecommended tool (a power drill), emphasizing the importance of proper torque to prevent damage.

6. Operating Instructions

The Heschen HSB6C-DC circuit breaker operates with a simple ON/OFF toggle mechanism.

1. To turn the circuit breaker ON, push the toggle switch upwards to the 'I ON' position. A green indicator will be visible.
2. To turn the circuit breaker OFF, push the toggle switch downwards to the 'O OFF' position. A red indicator will be visible.
3. In case of an overcurrent or short circuit, the circuit breaker will automatically trip to the 'O OFF' position, disconnecting the circuit to prevent damage.

Figure 10: Close-up view of the circuit breaker's front panel, highlighting the ON (green) and OFF (red) indicators, and the toggle switches for manual operation. The product label with model and rating information is also clearly visible.

6.1 Tripping Characteristics

The HSB6C-DC features a Type C tripping characteristic, which means it is designed for general purpose applications where the inrush current is moderate. It will trip instantaneously at 5 to 10 times its rated current.

Figure 11: Graph illustrating the Type C tripping characteristics, showing the relationship between tripping time (t/s) and the multiple of rated current (I/In). This curve indicates the time it takes for the breaker to trip under various overload conditions.

7. Maintenance

The Heschen HSB6C-DC Miniature Circuit Breaker requires minimal maintenance. However, regular inspections are recommended to ensure optimal performance and safety.

• Visual Inspection: Periodically check the circuit breaker for any signs of physical damage, discoloration, or loose connections.
• Terminal Tightness: Ensure all terminal screws remain tight. Loose connections can lead to overheating and potential hazards.
• Cleanliness: Keep the circuit breaker free from dust and debris. Use a dry, non-abrasive cloth for cleaning.
• Functionality Test: If safe to do so, periodically test the trip mechanism by simulating an overload condition (only if you have the proper equipment and expertise). Otherwise, rely on the breaker's automatic tripping function.

Always disconnect power before performing any maintenance or inspection.

8. Troubleshooting

If the circuit breaker trips frequently or fails to operate as expected, consider the following:

• Frequent Tripping:
  • Overload: The connected load may be drawing more current than the breaker's rated capacity (32A). Reduce the load or use a higher-rated breaker if appropriate for the circuit.
  • Short Circuit: A short circuit in the wiring or connected device will cause immediate tripping. Inspect wiring and devices for faults.
  • Ground Fault: While this is a DC breaker, a fault to ground could cause issues. Check for insulation damage.
  • Loose Connections: Loose terminal connections can cause resistance and heat, leading to nuisance tripping. Tighten all connections.
• Breaker Does Not Trip:
  • If an overload or short circuit occurs and the breaker does not trip, it may be faulty. Immediately disconnect power and replace the breaker.
• Physical Damage: If the breaker shows signs of burning, melting, or other physical damage, it must be replaced immediately.

If troubleshooting steps do not resolve the issue, consult a qualified electrician or contact Heschen customer support.

9. Warranty and Support

For warranty information and customer support, please refer to the Heschen official website or contact your point of purchase. Keep your purchase receipt as proof of purchase.

Manufacturer: Heschen

For further assistance, you may visit the Heschen store on Amazon: Heschen Store