Technical Specifications

FAQ

1. What is the main function of the NS1600N circuit breaker?

The NS1600N is a high-current low-voltage circuit breaker designed for power distribution and electrical protection in industrial installations. Its primary function is to connect and disconnect electrical circuits while providing protection against overloads and short circuits when equipped with a suitable trip unit. It helps protect transformers, distribution cables, switchboards, and other electrical equipment from damage caused by abnormal current conditions. It is commonly used in industrial power distribution systems where reliable circuit interruption and operational safety are essential.

2. What is the rated current of the NS1600N?

The NS1600N has a rated current of 1600 A at an ambient temperature of 50°C. This current rating makes it suitable for high-capacity power distribution applications, including main incoming feeders and industrial electrical panels. The actual operating current must be considered together with the installed trip unit, conductor capacity, ambient temperature, and load characteristics. When selecting a replacement, it is important to verify the complete model configuration rather than relying only on the NS1600N designation.

3. What is the short-circuit breaking capacity of the NS1600N?

The NS1600N belongs to the N breaking-capacity class, with a rated ultimate short-circuit breaking capacity of 50 kA at 415 V AC. Its breaking capacity varies according to the operating voltage. For example, the rated value is 30 kA at 660/690 V AC. This specification determines the maximum fault current the breaker can safely interrupt under defined test conditions. Before installation, engineers should calculate the prospective short-circuit current at the installation point and confirm that the breaker has sufficient interrupting capacity.

4. Which trip units are compatible with the NS1600N?

The NS1600N can be supplied with different electronic MicroLogic trip unit configurations, depending on the complete product reference. Common options include MicroLogic 2.0 and MicroLogic 5.0 series. These electronic trip units provide different protection and monitoring capabilities. Depending on the version, functions may include long-time overload protection, short-time protection, instantaneous short-circuit protection, and electrical measurement. When replacing a trip unit or purchasing a complete breaker, the rated current, compatibility, protection functions, and original configuration should all be verified.

5. What are the common causes of NS1600N circuit breaker tripping?

Unexpected tripping may result from prolonged overload conditions, short circuits, incorrect protection settings, or excessive starting currents from connected equipment. Loose electrical connections and insulation deterioration can also create abnormal operating conditions. To identify the cause, maintenance personnel should first examine the trip indication and check the actual load current. They should then inspect downstream circuits, verify the trip unit settings, and examine the condition of the electrical connections. Repeatedly resetting the breaker without identifying the fault may result in further equipment damage.

6. What is the difference between the manual and electrical operating versions of the NS1600N?

The manual operating version uses a mechanical operating mechanism for local opening and closing operations. The electrically operated version includes a motor mechanism that supports remote opening and closing through an external control system. Electrical operation is particularly useful in industrial switchboards and automated power distribution systems where remote control and centralized operation are required. The two configurations may have different accessories and control requirements, so the operating mechanism should be checked carefully when selecting a replacement unit.

7. Can the NS1600N be integrated into an industrial automation or power management system?

Yes. When equipped with compatible electrical accessories, auxiliary contacts, communication components, and electronic trip units, the NS1600N can support integration into industrial power management and monitoring systems. Auxiliary contacts can provide breaker status information, while compatible electronic units can provide electrical measurements and protection information. Remote operating functions may also be available with the appropriate motor mechanism and control accessories. The exact communication and monitoring capabilities depend on the installed configuration and additional equipment.

8. What maintenance procedures are recommended for the NS1600N?

Regular inspection and preventive maintenance are important for maintaining reliable circuit breaker operation. Maintenance personnel should check the main terminals, electrical connections, insulation components, operating mechanism, and auxiliary accessories for signs of overheating, corrosion, contamination, or mechanical wear. The operating mechanism should be inspected and tested according to the manufacturer’s maintenance instructions. Electronic trip unit settings and protection functions should also be verified periodically. If the breaker has interrupted a major short-circuit fault, its internal contacts and arc-extinguishing components should be professionally inspected before being returned to service. All maintenance work must be performed by qualified electrical personnel after proper isolation of the power supply.