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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3LD2555-0TK53 |
| Alternative Part Number | 3LD25550TK53 |
| Manufacturer | Siemens |
| Product Type | Switch Disconnector |
| Mounting Type | Fixed Mount |
| Operation Mechanism | Rotary actuation, red/yellow for emergency stop |
| IP Rating | IP65 |
| Number of Poles | 3 |
| Suitable for Use As | Disconnect switch, main switch, safety switch, emergency stop button, maintenance/repair switch |
| Product Equipment/Interlocking | Yes |
| Motor Drive Actuation | Not applicable |
| Ambient Operating Temperature | -25°C to +55°C |
| Insulation Voltage | Rated at 690V |
| Shock Resistance Voltage | Rated at 6,000V |
| Power Dissipation | Typical 4.5W per conductor |
| Mechanical Service Life | Typical 100,000 operating cycles for main contacts |
| Continuous Current Rating | 63A |
| Operating Current for AC-21 | Rated at 63A |
| Short-time Withstand Current | 1,260A at 690V for 1s |
| Operating Frequency | 50Hz to 60Hz |
| Utilisation Power for AC-3 | 18.5kW at 400V, 15kW at 690V |
| Utilisation Power for AC-23 A | 22kW at 400V, 18.5kW at 690V |
| Maximum Operating Frequency | 50 operations per hour |
| Auxiliary Contact Current | Rated at 10A |
| Auxiliary Contact Voltage | Maximum 500V AC |
| Short Circuit Protection | Required gL/gG fuse: 63A for main circuit, 10A for auxiliary contacts |
| Installation Type | Frontal mounting |
| Width | 90mm |
| Height | 107mm |
| Depth | 132.5mm |
| Connection Terminals | For main and auxiliary contacts |
| Conductor Cross-section Range | Main contacts: 2.5mm² to 35mm², Auxiliary contacts: 0.75mm² to 4mm² |
| Certifications/Approvals | CSA, UL, CCC, GL, LRS, DNV, PRS |
The Siemens 3LD2555-0TK53 is a robust switch disconnector designed to ensure a high level of safety and reliability for industrial power management. This fixed mount unit is engineered for front mounting and features a central hole mounting design for ease of installation. With a compact footprint of 90 x 126.3 x 90 mm, it is suitable for space-constrained environments.
Crafted for durability, the switch disconnector operates with a rotary actuator in a striking red and yellow colour scheme, signalling its role in emergency stop and safety applications. It boasts an IP65 protection rating, safeguarding against dust ingress and low-pressure water jets from any direction, making it suitable for a variety of challenging industrial settings.
The 3LD2555-0TK53 is a three-pole device with a continuous current rating of 63 A, capable of handling AC-23A at 400V up to 22 kW, making it a reliable choice for managing motor loads and other high-power applications. Its design accommodates a wide range of conductor sizes, ensuring versatility in connection options.
This switch disconnector is not only a main switch but also serves as a safety cut-out switch, an emergency stop switch, and a maintenance/repair switch, providing a multifunctional solution to meet diverse operational needs. It is designed to perform reliably within an ambient temperature range of -25 to +55°C, ensuring consistent performance even in extreme conditions.
The Siemens 3LD2555-0TK53 is a testament to Siemens' commitment to quality, offering a dependable solution for power isolation in industrial applications where safety and efficiency are paramount.
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Frequently Asked Questions
What type of device is this switch disconnector suitable for?
The switch disconnector is suitable for use as a main switch, emergency stop switch, safety switch, and for maintenance and repair operations in a variety of industrial applications.
Can this switch disconnector be used as a load break switch?
Yes, this switch disconnector is designed to function as a load break switch, allowing it to safely disconnect loads during operation.
What is the maximum operating current for this switch disconnector?
The maximum operating current for this switch disconnector is 63 A.
What are the dimensions of this switch disconnector?
The dimensions of the switch disconnector are 90 mm in width, 107 mm in height, and 132.5 mm in depth.
What is the IP rating of this switch disconnector?
This switch disconnector has an IP65 rating, indicating a high level of protection against dust and water ingress.
What type of connections can be made with this switch disconnector?
The switch disconnector allows for electrical connections to both the main circuit and auxiliary contacts using connection terminals.
What is the power loss per conductor for this switch disconnector?
The typical power loss per conductor for this switch disconnector is 4.5 W.
What certifications does this switch disconnector hold?
This switch disconnector holds certifications from CSA, UL, CCC, GL, LRS, DNV, and PRS, ensuring compliance with various international standards.
What is the mechanical operating life of this switch disconnector?
The mechanical operating life of this switch disconnector is typically 100,000 operating cycles for the main contacts.
Can this switch disconnector be mounted on a DIN rail?
No, this switch disconnector is designed for front mounting with central fixing and does not support DIN rail mounting.
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