DIHOOL DHM3Z-320A 320 Amp DC Circuit Breaker Instruction Manual

1. Produkt överview

The DIHOOL DHM3Z-320A is a 320 Amp DC Circuit Breaker designed for robust electrical system protection. This 2-pole, 1000V device features a 20kA breaking capacity and a thermal magnetic trip mechanism, making it suitable for various high-power DC applications.

Nyckelfunktioner:

Bidirectional Switch: Capable of tripping effectively during short circuits on both supply and load sides, mitigating overheating and fire risks.
High-Capacity DC Circuit Breaker: Provides reliable overload and short-circuit protection for heavy-duty DC electrical systems.
Thermal Magnetic Trip: Advanced technology ensures precise protection against circuit overloads and short circuits.
Silver Contacts: Features 50% silver in moving contacts and 85% silver in stationary contacts for superior conductivity, durability, and corrosion resistance.
Hög voltage & Breaking Capacity: Operates at 1000V with a 20kA short-circuit breaking capacity at 1000V.
Mångsidig applikation: Suitable for photovoltaic systems, batteries, UPS systems, RVs, marine equipment, and trucks.

DIHOOL DHM3Z-320A 320 Amp DC effektbrytare — Figure 1: DIHOOL DHM3Z-320A 320 Amp DC Circuit Breaker. This image shows the overall appearance of the circuit breaker.

2. Paketets innehåll

Kontrollera att alla artiklar finns i paketet före installation.

1 x DIHOOL DHM3Z-320A 320 Amp DC Circuit Breaker (MCCB)
2 x Clapboards

Package contents of DIHOOL DHM3Z-320A circuit breaker — Figure 2: Package Contents. The image displays the 320A MCCB and two clapboards included in the package.

3. Specifikationer

Specifikation	Värde
Stämpla	DIHOOL
Modell	DHM3Z-320A
Aktuellt betyg	320 Amps
Voltage Betyg	1000V DC
Brytkapacitet	20kA at 1000V
Antal poler	2
Strömbrytartyp	Standard, Thermal Magnetic Trip
Monteringstyp	Skruvmontering
Produktmått (D x B x H)	160 x 230 x 131 mm (ca 6.3 x 9.06 x 5.15 mm)
Objektets vikt	2.2 kilo
Inkluderade komponenter	Arc barrier

Dimensions of DIHOOL DHM3Z-320A circuit breaker — Figure 3: DHM3Z-320A Dimensions (2P). This diagram illustrates the physical dimensions of the circuit breaker in millimeters.

4. Installation

4.1 Säkerhetsföreskrifter

Se till att alla strömkällor är frånkopplade före installation.
Installationen ska utföras av kvalificerad personal i enlighet med lokala elföreskrifter och -föreskrifter.
Använd lämplig personlig skyddsutrustning (PPE), inklusive isolerade handskar och ögonskydd.
Verify correct polarity when connecting DC circuits.

4.2 Kopplingsschema

Refer to the following diagram for typical wiring connections in a solar power system. The circuit breaker should be installed between the battery/inverter and the load/utility power as shown.

Wiring diagram for DIHOOL DHM3Z-320A DC circuit breaker in a solar system — Figure 4: Typical Wiring Diagram. This diagram illustrates the connection of the circuit breaker within a system involving an inverter, battery, and utility power.

4.3 Mounting Methods

The DHM3Z-320A circuit breaker is designed for screw mounting. Choose an appropriate mounting surface and hardware based on the installation environment.

Plastic Sheeting: Use screws and nuts for secure attachment.
Vertical Wooden Board: Use expansion screws and self-tapping screws.
Iron Plate: Use screws and nuts.

Installation methods for DIHOOL DHM3Z-320A circuit breaker — Figure 5: Installation Methods. This image shows examples of mounting the circuit breaker on plastic sheeting, wooden boards, and iron plates.

5. Drift

The circuit breaker features a toggle handle for switching the circuit on and off, and a red button for manual tripping.

För att stänga av: Push the handle DOWN. This disconnects the circuit.
För att slå PÅ: Push the handle UP. This connects the circuit.
To Trip Manually: Press the RED button. This will immediately open the circuit, regardless of the handle position.

Viktig anmärkning: If the circuit breaker is in a tripped (OFF) state, you may be unable to push the handle directly UP to the ON position. In such cases, first push the handle fully DOWN to reset the mechanism, then push it UP to restore power.

Operating instructions for DIHOOL DHM3Z-320A circuit breaker — Figure 6: Instructions for Use. This image illustrates the handle positions for switching on and off, and the location of the red trip button.

6. Funktioner och teknik

6.1 High-Strength Plastic Shell

The circuit breaker is encased in a high flame-retardant plastic shell, offering excellent insulation performance and protection. This design ensures durability and reliable operation in outdoor environments and various weather conditions.

High-strength plastic shell of the DIHOOL circuit breaker — Figure 7: High-Strength Plastic Shell. This image highlights the robust exterior construction of the circuit breaker.

6.2 Silver Contacts and Arc Separators

The device incorporates silver contacts for high current carrying capacity and improved conductivity. High-quality arc separators with thickened copper parts are used to ensure a more stable current flow and enhanced arc extinguishing performance.

Silver contacts and arc separators in DIHOOL circuit breaker — Figure 8: Silver Contacts and Arc Separators. This image details the internal components responsible for conductivity and arc suppression.

6.3 Thickened Arc Extinguishing Hood

The circuit breaker features a thickened arc extinguishing hood, which provides superior arc extinguishing performance compared to standard designs. This enhances safety and reliability during fault conditions.

Thickened arc extinguishing hood comparison — Figure 9: Thickened Arc Extinguishing Hood. This image compares the thickness of the arc extinguishing hood with other designs.

6.4 Tripping Sensitivity

The DHM3Z-320A DC Circuit Breaker offers a tripping sensitivity of 0.1 to 0.2 seconds, providing rapid protection against electrical faults.

Circuit breaker tripping sensitivity comparison — Figure 10: Circuit Breaker Tripping Sensitivity. This image illustrates the tripping time comparison between fuses, miniature circuits, and DC breakers.

7. Ansökningar

The DIHOOL DHM3Z-320A DC Circuit Breaker is suitable for a variety of demanding DC applications, including:

Photovoltaic (Solar) Power Generation Systems
Wind Power Generation Systems
Rail Transit Power Distribution Systems
Infrastructure Construction
UPS-system
Batteribanker
RVs and Marine Equipment

Applications of DIHOOL DHM3Z-320A circuit breaker — Figure 11: Widely Used Applications. This image displays various environments where the circuit breaker can be utilized.

8. Underhåll

Regular inspection of the circuit breaker is recommended to ensure optimal performance and safety. Check for any signs of physical damage, loose connections, or discoloration. Keep the area around the circuit breaker clean and free from obstructions. Do not attempt to repair the circuit breaker yourself; contact a qualified electrician if maintenance or repair is required.

9. Felsökning

Om strömbrytaren löser ut ofta eller inte fungerar korrekt, tänk på följande:

Ofta snubblar: This may indicate an overload or a short circuit in the connected system. Disconnect loads and check for faults. Ensure the total current draw does not exceed the breaker's rated capacity.
Misslyckades med att återställa: If the breaker does not reset after pushing the handle down and then up, there might be a persistent fault or internal damage.
Överhettning: Check for loose connections or excessive current draw.

For any persistent issues or complex problems, consult a qualified electrician or contact DIHOOL customer support.

10. Garanti och support

For warranty information and technical support, please refer to the product packaging or contact DIHOOL customer service directly. Keep your purchase receipt for warranty claims.