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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3NP1123-1BC20 |
| Alternative Part Number | 3NP11231BC20 |
| Manufacturer | Siemens |
| Product Type | Fuse Switch Disconnector |
| Rated Operational Current (Ie) | 72 A at 400 V AC for capacitor; 160 A for AC-21 B; 160 A for AC-22 B; 160 A for AC-23 B at 400 V |
| Rated Insulation Voltage (Ui) | 690 V |
| Rated Impulse Withstand Voltage (Uimp) | 8 kV |
| Conditional Short-Circuit Current (Iq) | 80 kA at 500 V AC; 120 kA with closed switch at 500 V AC |
| Degree of Protection | IP20 open; IP30 without cover; IP40 with cover or cable lug cover |
| Mounting Type | DIN Rail Mount |
| Mounting Position | Horizontal/Vertical |
| Busbar Centre-to-Centre Spacing | 60 mm |
| Net Weight | 0.82 kg |
| Ambient Temperature Range | -25 °C to +55 °C during operation; -50 °C to +80 °C during storage |
| Power Loss | 14 W per pole in hot operating state |
| Dimensions | 88.8 x 125.1 x 207 mm |
| Degree of Pollution | 3 |
| Connection System | Box terminal |
| Connectable Conductor Cross-Section | 1.5 mm² to 50 mm² single or multi-stranded; 1.5 mm² to 35 mm² finely stranded with core end processing |
| Tightening Torque | 3.5 N·m minimum; 4 N·m maximum |
| Mechanical Operating Cycles | 2,000 typical |
| Product Function | Switch disconnector with safety switch and maintenance/repair switch capability |
The Siemens 3NP1123-1BC20 is a robust and reliable fuse switch disconnector designed to enhance operational efficiency and safety in industrial power management. This three-pole device is compatible with NH000 size fuse links and is specifically engineered for seamless integration with the 8US busbar system measuring 60 mm. It features a box terminal connection and is crafted to accommodate busbar thicknesses of 5 or 10 mm, offering flexibility for various installation requirements.
With a cover level of 32/70 mm, the 3NP1123-1BC20 ensures a secure and protected environment for electrical components. The unit is built to withstand an operational current of up to 160 A at 35 °C, demonstrating its capacity to handle significant electrical loads. The disconnector is also designed to endure a mechanical service life of approximately 2,000 typical switching cycles, highlighting its durability and long-term reliability.
The device boasts an insulation voltage rated at 690 V, with a surge voltage resistance of 8 kV, ensuring it can perform safely under challenging electrical conditions. It also offers a degree of pollution classification of 3, indicating its capability to operate effectively even in environments with a certain level of contaminants.
For safety and compliance, the 3NP1123-1BC20 is designed with a protection class of IP40 when the switch is closed with a cover or cable lug cover, and IP30 without. This level of protection ensures that the device is safeguarded against ingress of solid objects and provides a degree of touch protection.
The Siemens 3NP1123-1BC20 is a testament to Siemens' commitment to quality, safety, and efficiency in electrical power distribution. Its design and construction make it an essential component for industrial settings requiring reliable and secure power management solutions.
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Frequently Asked Questions
What type of device is this and what are its main uses?
This device is a fuse switch disconnector, primarily used for ensuring safe operation and disconnection in electrical circuits. It's suitable for use in industrial control, distribution boards, and infrastructure applications.
Can this fuse switch disconnector be mounted on a DIN rail?
Yes, the Siemens 3NP1123-1BC20 is designed for DIN rail mounting, which facilitates easy installation and integration into electrical distribution systems.
What is the rated operational current for this device?
The rated operational current for this fuse switch disconnector is 160 A, making it suitable for handling high current applications.
What is the degree of protection provided by this device?
The device provides an IP20 degree of protection when open, IP30 without a cover or cable lug cover, and IP40 with a cover or cable lug cover.
What are the dimensions of this fuse switch disconnector?
The dimensions of the device are 88.8 mm in width, 211.4 mm in height, and 127.6 mm in depth.
Is this device suitable for both AC and DC applications?
Yes, the fuse switch disconnector is suitable for both AC and DC applications, with specific operational current ratings depending on the voltage and utilization category.
What is the conditional short-circuit current rating for this device?
The conditional short-circuit current rating is 80 kA at 500 V and 690 V with AC and speedy activation, and 120 kA with the switch closed at the same voltages.
Can this device be used with different sizes of busbars?
Yes, it is compatible with a 60 mm busbar system and can accommodate busbar thicknesses of 5 or 10 mm.
What type of terminal connection does this device have?
The device features a box terminal connection for the main current circuit, which allows for secure and reliable connections.
What ambient temperature range can this device operate within?
The device can operate within an ambient temperature range of -25 °C to +55 °C, ensuring reliable performance in various environmental conditions.
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