ABB - Installation Products 9MT34U0W30B - DuraGard Watertight Safety Interlock with Circuit Breaker, through 600VAC/250VDC, 30 Amp trip rating
ABB - Installation Products

9MT34U0W30B

UPC: 708917299004


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Overview

The ABB DuraGard Watertight Safety Interlock with Circuit Breaker (SKU: 9MT34U0W30B) is a high-integrity industrial safety device designed for applications requiring reliable overcurrent protection and watertight operation. This 30 Amp circuit breaker interlock system is rated for 600VAC and 250VDC, making it suitable for harsh industrial environments where electrical safety and durability are critical. The device integrates a failsafe bi-directional cylinder-lift terminal at top and bottom (shock-protected) with cage terminals for currents over 63A, ensuring secure cable connections. Key specifications include a short circuit interrupt rating of up to 10 kA, support for trip curves B, C, D, K, and Z, and compatibility with auxiliary contacts, bell alarms, and shunt trips for enhanced functionality. The unit mounts on a 35mm DIN rail (EN/IEC 60715) via a fast clip device and supports any mounting position. Terminal sizes accommodate AWG 18-4 (up to 63A) and AWG 18-8 (up to 63A) for cables, with 10/10mm busbar compatibility. Dimensions are 85 x 69 x 35mm (2P) and 85 x 69 x 70mm (4P), with a tightening torque of 2.8 Nm (3 Nm for 125A). Ideal for industrial machinery, control panels, and high-voltage applications, the DuraGard interlock prevents unauthorized access to live components while providing robust overcurrent and short-circuit protection. The watertight design ensures reliable operation in wet or dusty conditions, meeting stringent safety standards for demanding environments.
  • 30 Amp circuit breaker with 600VAC/250VDC rating
  • Watertight design for harsh industrial environments
  • Short circuit interrupt rating up to 10 kA
  • Failsafe bi-directional cylinder-lift terminals (top/bottom)
  • Mounts on 35mm DIN rail (EN/IEC 60715) with fast clip device
  • Supports trip curves B, C, D, K, and Z
  • Compatible with auxiliary contacts, bell alarms, and shunt trips
  • Dimensions: 85 x 69 x 35mm (2P), 85 x 69 x 70mm (4P)

Specifications

Amperage Rating
30 Amps
Application
For use where electrical connections need protection from water and/or dust entrance to the contacts or the wiring compartment
Material
DuraV
Number Of Poles
3
Number Of Wires
4
Special Features
Not just "watertight", Waterproof for washdown duty (DurORing Sealing) that eliminates the need for costly "weather boots" or "adapters."
Type
DuraGard Waterproof Connections
Voltage Rating
600 V
Package Dimensions (L x W x H)
0.01 IN x 0.01 IN x 0.01 IN
Package Dimensions (L x W x H)
0.0254 cm x 0.0254 cm x 0.0254 cm
Package Weight (Imperial)
7.000 L
Package Weight (Metric)
3.175 kg
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How to Install the DuraGard Safety Interlock

This guide provides step-by-step instructions for installing and wiring the DuraGard Safety Interlock to ensure safe and reliable operation.

Estimated time: 45m

Tools needed:

Screwdriver, Wire strippers, Ohmmeter, Torque Wrench

Supplies needed:

Mounting screws, Terminal connectors, Liquid-tight conduit fitting

  1. Prepare the installation site

    Turn the handle to the 'OFF' position. Remove the cover from the base if attached, and mount the base to a wall or I-beam at a de-energized power drop with the receptacle facing down, using the adjustable mounting feet. Tighten the mounting screws to 20 in. lbs.

  2. Connect the grounding wire

    Attach the ground wire to the grounding hub as per the schematic. Ensure that the same colored/numbered circuits are maintained through each junction, paying special attention to the grounding lead connection.

  3. Wire the circuit breaker

    Loosen the pressure screws on the terminals of the circuit breaker and neutral block if used. Strip the wire ends to 5/8” and insert them into the breaker terminals on the line side. Tighten the screws to the specified torque shown on the breaker.

  4. Reassemble and test

    Ensure the disconnect handle is in the 'OFF' position, then reassemble the cover with screws at a maximum of 20 in. lbs. torque. Perform electrical tests to verify correct phasing and grounding connections using an ohmmeter.

  5. Finalize installation

    Record the catalog number and installation date. Instruct personnel on the operation procedures and ensure all safety warnings are communicated.

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