Rafseglar 187 - Innsetning á töflu 70 A

A BLUE SEA 187 series circuit breaker is an electrical protection device designed for marine applications. Specifically, it is a thermal circuit breaker, meaning it detects overcurrent conditions caused by excessive circuit heating. This model is designed for flush-panel mounting, providing a clean and integrated finish.

The main function of this circuit breaker is to protect electrical circuits and connected equipment from damage caused by overcurrents or short circuits. In the event of excessive current, it automatically interrupts the circuit to prevent cable overheating and equipment failure. Its 70 ampere capacity makes it suitable for high loads.

Yes, the BLUE SEA 187 series circuit breaker is specifically designed to withstand the harsh conditions of the marine environment. It is typically made from corrosion-resistant materials and is often protected against water spray and ignition, making it safe and reliable aboard boats.

The nominal current rating for this specific model is 70 amperes (70 A). This means it is designed to operate continuously with a current up to 70 amperes without tripping, and will trip to protect the circuit if the current exceeds this value for a given period.

This circuit breaker is a manual reset model. After a trip caused by an overcurrent, simply press the reset button or lever to return it to the 'ON' position once the cause of the overcurrent has been identified and corrected.

The 'trip-free' feature (or 'trip-free mechanism') means that the circuit breaker cannot be manually held closed if an overload or short-circuit condition persists in the circuit. Even if the operator tries to keep it in the 'ON' position, it will trip automatically to ensure circuit protection, which is a critical safety feature.

Advantages of a thermal circuit breaker over a fuse include manual reset capability, eliminating the need to replace a blown fuse. It also provides more gradual overload protection, tripping based on both the intensity and duration of the overload, and can function as a switch.

Yes, BLUE SEA’s 187 series circuit breakers are typically certified as ignition protected per SAE J1171. This feature is critical for marine applications because it ensures the breaker will not produce sparks or electrical arcs that could ignite fuel vapors in engine compartments.

This circuit breaker is made with robust materials resistant to corrosion, suitable for a marine environment. The housing is typically made of thermosetting plastic, and the terminals are often made of tinned copper to ensure excellent conductivity and resistance to oxidation.

This circuit breaker is designed for panel mounting. This means it is recessed into a cutout made in a dashboard or distribution panel, with the front face of the circuit breaker flush with the panel surface.

Installation on a panel is relatively straightforward for an electrician or a skilled DIYer. It involves making a precise cut in the panel, securing the circuit breaker with screws or a clamping system, then connecting the cables to the appropriate terminals. Detailed instructions are usually provided with the product.

For a 70 A circuit breaker, the cable diameter must be selected based on the maximum current, cable length, and acceptable voltage drop. It is essential to consult marine electrical standards (such as ABYC standards in the United States or ISO/IEC in Europe) to choose the appropriate cable cross-section to prevent overheating and energy losses. A cable cross-section that is too small could lead to excessive heating and a fire risk.

In general, a circuit breaker is a primary protection device and does not require a fuse upstream for the same overcurrent protection function. However, in some complex systems or for specific applications, a main fuse or a higher-capacity circuit breaker may be used upstream to protect the entire circuit or the main wiring leading to the distribution panel.

Cut off the system's power supply.Choose a suitable location on the panel.Cut the panel according to the manufacturer's specified dimensions.Insert the circuit breaker into the cutout and secure it firmly.Connect the power and load cables to the circuit breaker terminals, respecting polarity.Check all connections and restore power to test operation.It is always recommended to follow the manufacturer's specific instructions.

This 70 A circuit breaker is ideal for protecting circuits requiring high current in a marine environment. It can be used for equipment such as power inverters, electric windlasses, bow thrusters, high-flow bilge pumps, refrigeration systems, or main distribution circuits for heavy loads.

This Blue Sea Systems circuit breaker is covered by the manufacturer's warranty, which provides protection against material and manufacturing defects. Blue Sea Systems is a reputable manufacturer known for the quality of its products. The exact duration and conditions of this warranty are set by the manufacturer and comply with common industry practices for marine electrical equipment.