DC 250A Protection Box for Delong Lithium Batteries

250A Protection Box for Delong Batteries – Ready to Install

The 250A protection box for Delong batteries is a turnkey solution for securing your energy storage installations. Designed to protect your batteries and inverters, it centralises direct current and offers maximum protection against overloads and short circuits.

Box contents

This box is delivered complete and ready to install:

• IP65 box: Total protection against dust and water splashes
• 4 x 50 mm² 1.50 m cables with terminals: Secure connection to the inverter
• 2P 250A DC1000V TOMZN - TOM7Z circuit breaker: Main protection against overload and short circuits
• 2 x 95 mm² 1 m cables with terminals: Secure connection for your Delong battery packs

How the box works

The box is designed to protect and distribute power reliably:

• Delong batteries are connected via the 95 mm² cables supplied with the box
• The 2P 250A circuit breaker protects the entire circuit against overload and short circuit
• The four 50 mm² cables (1.50 m) enable a direct and secure connection to the inverter

Principle: The current from the batteries passes through the 250A circuit breaker before supplying the inverter, ensuring maximum safety and protection.

Typical applications

• Residential or professional installations with Delong batteries
• Modular parallel storage systems
• Complete protection for PV + storage or hybrid installations

Advantages of the cabinet

• Turnkey solution: cabinet, cables and circuit breaker included
• Quick and easy installation
• Maximum protection against overload and short circuit
• Secure connection to inverter and batteries
• Reduced maintenance thanks to the resettable circuit breaker

Commissioning

1. Check that the 250A circuit breaker is in the OFF position
2. Connect the 95 mm² cables to the Delong battery packs
3. Connect the four 50 mm² 1.50 m cables to the inverter
4. Observe the polarity (+ red, - black)
5. Set the circuit breaker to the ON position and check that it is working properly

Safety and maintenance

• 2P 250A circuit breaker: Resettable, overload and short-circuit protection
• Large-section 95 mm² and 50 mm² cables: Reliable connection and minimal losses
• IP65 enclosure: Total protection against dust and water splashes
• Simple maintenance: visual inspection and periodic circuit breaker testing