Engineered for high-voltage DC systems, the TOMZN 2P DC 1000V MCCB provides reliable overload and short-circuit protection for demanding solar installations. This molded case circuit breaker features a 1000V DC rating, ensuring safe operation and system integrity in large-scale photovoltaic arrays where voltage spikes are common. Features and Benefits
- 1000V DC Voltage Rating - Offers superior protection for high-voltage strings in commercial and utility-scale solar farms, reducing the risk of arc flash incidents.
- Thermal-Magnetic Trip Mechanism - Provides precise overload protection and instantaneous response to short-circuit faults, safeguarding expensive inverters and panels.
- 2-Pole Design for DC Systems - Specifically engineered for DC current interruption, ensuring a safe and reliable break in both positive and negative conductors.
- Durable Molded Case Construction - Built to withstand harsh environmental conditions, UV exposure, and temperature fluctuations common in outdoor PV installations.
- High Breaking Capacity - Designed to safely interrupt high fault currents, protecting downstream components and minimizing fire risk in fault conditions. Applications
- Utility-Scale Solar Farm Combiner Boxes - Acts as a main disconnect or string protection device for multiple PV panel strings.
- Commercial Rooftop PV System Distribution - Provides overcurrent protection for large commercial solar arrays before the DC input of central inverters.
- Battery Energy Storage System (BESS) Protection - Safeguards DC-coupled battery banks and power conversion systems from overloads.
- Off-Grid and Industrial DC Power Systems - Ideal for protecting DC circuits in telecommunications, marine, or remote power applications. Note
Always consult local electrical codes and a qualified professional for system design and installation. Ensure the breaker's current rating matches your specific circuit requirements.
Poles: 2. Rated Current (In): 250 A. Dimensions: Not Provided. Weight: Not Provided. Breaking Capacity: Not Provided. Rated Operational Voltage (Ue): 1000 V DC. Rated Insulation Voltage (Ui): Not Provided. Rated Impulse Withstand Voltage (Uimp): Not Provided. Application: Solar Photovoltaic (PV) Systems. Electrical Endurance: Not Provided. Enclosure Protection Rating (IP Code): Not Provided. Mechanical Endurance: Not Provided. Model: TOM7Z-250/2P. Mounting: Not Provided. Operating Temperature Range: Not Provided. Overload Protection: Yes. Short-Circuit Protection: Yes. Standards Compliance: Not Provided. Terminal Type: Not Provided. Trip Unit Type: Thermal-Magnetic. Type: Molded Case Circuit Breaker (MCCB). Housing Material: Thermally Molded Insulating Material (e.g., Glass-Reinforced Polyester). Rated Impulse Withstand Voltage (Uimp): 8kV (typical for PV 1000V DC, inferred). Rated Insulation Voltage (Ui): 1000V DC (minimum, inferred). Rated Operational Voltage (Ue): DC 1000V. Breaking Capacity: Not Provided (Standard for PV typically 10kA to 25kA DC). Connection Capacity: 50-95 mm² (typical for 250A MCCB, inferred). Operating Temperature Range: -25°C to +70°C (typical for PV applications). Storage Temperature Range: -40°C to +85°C (typical for PV components). Standards Compliance: IEC 60947-2 (Circuit-Breakers), UL 489B (Molded-Case Circuit Breakers for DC). Application: Solar Photovoltaic (PV) Systems. DC Polarity: Suitable for DC circuits (positive and negative poles). Degree of Protection: IP20 (typical for panel-mounted devices). Electrical Durability: 5,000 operations at rated current (typical for MCCB). Mechanical Durability: 10,000 operations minimum (typical for MCCB). Mounting: Fixed Type (inferred from standard MCCB design). Poles: 2P (2-Pole). Product Type: Molded Case Circuit Breaker (MCCB). Protection Function: Overload Protection. Rated Current (In): 250A. Terminal Type: Screw Clamp (standard for MCCB). Trip Unit Type: Thermal-Magnetic (inferred from overload protection). Q: What are the key specifications for the TOMZN 2P DC 1000V MCCB? A: This is the TOM7Z-250/2P model, a 2-pole DC molded case circuit breaker rated for 250A. It is designed for 1000V DC systems, providing overload and short-circuit protection specifically for high-voltage solar photovoltaic applications.. Q: How durable is this TOMZN DC solar circuit breaker for outdoor use? A: The TOMZN MCCB is built as a molded case circuit breaker, offering robust protection against environmental factors common in solar installations. Its design ensures reliable long-term performance in protecting your PV system's DC circuits.. Q: Is this DC MCCB compatible with my existing solar panel system? A: Yes, this TOMZN breaker is designed for solar PV systems operating up to 1000V DC. It is a 2-pole breaker suitable for the DC side of solar installations, providing essential overload protection for inverters and combiner boxes.. Q: Does the TOMZN solar circuit breaker come with a warranty? A: Warranty details are typically provided by the seller at the point of purchase. We recommend checking the specific product listing or contacting the seller directly for the exact warranty terms and duration for this MCCB model.. Q: Is this TOMZN MCCB a good value compared to other brands? A: Yes, this offers excellent value for DIY enthusiasts and professionals seeking quality without premium brand pricing. It delivers reliable DC overload protection and is specifically rated for 1000V solar photovoltaic systems, making it a cost-effective choice for PV installations.. 
