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Phoenix Contact UTT 2.5 Knife Disconnect Terminal Block - 3044670

Phoenix Contact UTT 2.5 Knife Disconnect Terminal Block - 3044670

Professional knife-disconnect terminal block featuring test socket screws for test plug integratio...

Best current price£10.76from Tameson UK

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Tameson UKPhoenix Contact Utt 2.5 Knife Disconnect Terminal Block - 3044670
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£10.76
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Product Information

Full details

This Phoenix Contact 3044670 knife-disconnect terminal block is designed for electricians and control panel builders who need reliable circuit separation and testing capabilities. Its key benefit is the integrated test socket screws, allowing for easy insertion of test plugs for diagnostic purposes without interrupting the main circuit. A potential consideration is its specific voltage and current ratings, which must match application requirements.

All features

Model Part Number3044670
BrandPhoenix Contact

Extended Product Information

FAQs

What is the primary function of the test socket screws?

The test socket screws allow for the insertion of test plugs, enabling measurement devices like multimeters to be connected to the circuit for testing or diagnostics without having to disconnect the main wiring.

What is the maximum wire size this terminal block can accommodate?

This terminal block can accommodate wire sizes from 0.14 mm² up to 4 mm², which corresponds to AWG 26 to 12.

What type of mounting rail is required for this terminal block?

This terminal block is compatible with Phoenix Contact NS 35/7.5 and NS 35/15 mounting rails.

Can this terminal block be used for high-power applications?

No, this terminal block is rated for a nominal voltage of 400V and a nominal current of 16A. It is suitable for control circuits and moderate power applications, but not for high-power distribution.

What safety certifications does this product have?

The product is UL Listed and CSA certified, and has a UL 94 V-0 flammability rating.

How is the disconnect knife operated?

The disconnect knife is operated via a lever-type mechanism integrated into the terminal block. This allows for easy and safe separation of circuits.

What is the flammability rating?

The terminal block has a UL 94 V-0 flammability rating, indicating it self-extinguishes rapidly.

Troubleshooting

Terminal connection is loose

Ensure the wire is stripped to the correct length and the screw is tightened firmly. Verify the wire gauge is within the supported range (0.14-4 mm²).

Disconnect knife is stiff or difficult to operate

Check for any obstructions. Ensure the terminal block is correctly mounted on the rail. A small amount of contact lubricant may be applied if the issue persists, following manufacturer recommendations.

Test plug does not make proper contact

Verify that the correct type of test plug compatible with the UTT 2.5-2MT-P/P terminal block is being used. Ensure the test plug is fully inserted into the socket screws.

Overheating at the connection

Check that the wire gauge and current are within the specified limits (4 mm² max, 16A max). Ensure all screw connections are tightened properly. If the problem persists, the terminal block may be overloaded or damaged.

Pros and Cons

Pros

  • Facilitates safe circuit isolation with its knife-disconnect feature.
  • Simplifies testing and diagnostics through integrated test socket screws.
  • Robust construction with UL and CSA certifications for reliability.
  • Accommodates a good range of wire sizes (0.14-4 mm² / 26-12 AWG).
  • Clear labeling options for organized wiring.

Cons

  • Limited to 400V and 16A, not suitable for high-power applications.
  • Requires specific test plugs for utilizing the test socket feature.
  • Screw connection may require more manual effort than push-in alternatives.
  • Dimensions (5.2mm width) may be a consideration in densely packed enclosures.

Setup, Compatibility & Care

Setup:

  1. Mount the terminal block onto a compatible NS 35/7.5 or NS 35/15 mounting rail.
  2. Strip the wire ends to the appropriate length for the screw terminals.
  3. Insert the wire into the terminal opening and tighten the screw securely using a suitable screwdriver.
  4. To engage the disconnect knife, use the lever mechanism.
  5. For testing, insert a compatible test plug into the designated test socket screws.

Compatibility:

  • Compatible with Phoenix Contact NS 35/7.5 and NS 35/15 mounting rails.
  • Supports wire sizes from 0.14 mm² to 4 mm² (AWG 26 to 12).
  • Designed for nominal voltages up to 400V and currents up to 16A.
  • Requires specific test plugs designed for this type of terminal block.

Care:

  • Keep the terminal block clean and free from dust and debris.
  • Periodically check screw connections for tightness, especially in environments with vibration.
  • Ensure the disconnect knife mechanism operates smoothly; lubricate sparingly if needed with an appropriate contact spray, following manufacturer guidelines.
  • Avoid exposing the terminal block to excessive moisture or corrosive substances.

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