Power-Zone™ 4 Low-Voltage, Metal-Enclosed, Drawout Switchgear with MasterPacT™ Low Voltage Power Circuit Breakers – Catalog
6037CT9901

Breaker Racking, Moving and Handling Options

Whether configured as a single unit or as multiple units, assembled together within a shipping group, Power-Zone 4 switchgear enclosures are designed to withstand the rigors of lifting, handling, shipping, and setting into place. Maximum sizes are determined by shipping dimensions required for transportation on common carrier trucks and movement through standard equipment location openings (door and portals). For ease of handling by a crane, all shipping splits 72 in. wide and less are equipped with lifting straps at each corner of the shipping split. (Single section shipping splits can be requested as an option.) Lifting straps are not furnished on shipping sections longer than 72 in. and must be handled by rollers, slings, or other means.

Circuit breaker lifter bars are used with 3-pole (see Typical Circuit Breaker Lifter Bar below), 4-pole, 6-pole and 8-pole MasterPacT circuit breakers. The size of the circuit breaker determines whether the inside or outside notches on the lifter bar will be used.

Typical Circuit Breaker Lifter Bar

Traveling Lifter Assembly

A rail-mounted, traveling type, circuit breaker lifting device is optionally available with indoor type switchgear. The lifting device is capable of lifting MasterPacT circuit breakers into and out of any compartment. The circuit breaker is raised or lowered by manually cranking the hoisting mechanism. The manually operated traveling lifter assembly is supplied with outdoor walk-in enclosures as standard. The maximum load weight of the travel lifter assembly is 300 lbs.

NOTE: The lifting device is not available with arc resistant or front accessible enclosures. A special version is available for enclosures with drip hoods by contacting the factory.

Rail-Mounted Circuit Breaker LIfting Device

Floor Crane

Standard Width, Floor Crane Specifications

A floor crane can move into and out of any compartment and can be used with the lifter bar to move a MasterPacT circuit breaker into a dedicated work area. The Standard Width Floor Crane has dimensions as shown in figure 18 above and has a rated load capacity of 1,000 lbs. It can be used to lift 3,4,6 or 8-pole breakers with the associated breaker lifter bars.

NOTE: The floor crane can not be used in the outdoor walk-in enclosures.

Reduced Width Floor Crane Specifications

Designed for 36” aisleways common in electrical rooms, the reduced width floor crane allows 360-degree rotation and lifting of MasterPacT 3-pole breakers. (Not for use on 6-pole, 4-pole or 8-pole breaker construction.) Specially designed with folding legs and lifting arm to minimize storage space this is frequently ordered for Front accessible switchgear applications where space is a premium.

General Dimensions:

  • Height = 96 in. max.

  • Width at the base = 30 in. max.

  • Depth = 38 in. max.

  • Hook Lift Range = 20 in. min. to 104 in. max.

Standards:

  • Adherence to C37.20.1, section 7.14

  • Proof-tested to OSHA 29CFR 1926.251 (a)(4){B13]

Features:

  • Load Capacity to 300 lbs. maximum

  • Ability to lock lifter in stationary position

  • Corrosion Resistant and life cycle minimum 25-30 years

  • Front and/or Side lifting of breaker

  • Ability to access 3-pole MasterPacT MTZ1,2 or NT/NW in all cell positions

  • Height of housekeeping pad for gear can be up to 6 in.

  • The lineup can be installed up to 5" from the front edge of the housekeeping pad

Remote Racking

MasterPacT NT/NW, MTZ1, MTZ2, MTZ3 Remote Racking Device enhances safety of maintenance personnel. Provides ability to operate racking mechanism of a low-voltage draw-out circuit breaker from a remote location. Designed to help you reduce the arc flash safety hazard for personnel during installation, startup and maintenance procedures by allowing maintenance personnel the ability to “rack” a low voltage draw-out circuit breaker from a location outside of the arc flash boundary. The compact, portable, and simple design enhances the effective use of the remote racking device. The remote racking device allows the operator to perform circuit breaker racking operations from a distance of up to 9.1 m (30 ft.) away from the circuit breaker using the controller. This distance exceeds the arc flash boundary described in the arc flash safety guidelines outlined in NFPA 70E.

Overview

Features and Benefits

  • Significantly reduce the risk of exposure to direct blast or projectiles during an arc flash event

    • Personnel can operate the racking mechanism of circuit breakers from a distance of 30 ft. allowing operators to be outside of the arc flash boundary area

  • Enhance operator peace of mind with multiple safety features:

    • Self-test for correct operation gives visual indication that the device is working properly

    • Through-the-door design allows the equipment door to remain closed while the device is installed

    • Visual indication notifies the operator when the racking mechanism has completed its cycle

  • Improve efficiency of maintenance and installation teams with a lightweight and portable design:

    • Device is easily connected and operated by one person

    • Easily transferred from one circuit breaker to another during maintenance or installation procedures

    • No application limitations based on height or position of circuit breaker

    • Compact protective case with retractable handle and wheels can be easily maneuvered even in tight spaces

  • Aid in user compliance with arc flash personnel protection as listed in NFPA 70E and CSA Z462 safety standards

Lightweight, Portable Device

  1. Drive Unit

    • Portable, compact unit weighing just 15 lbs.

    • Simple attachment to the front of the circuit breaker while the door is closed

  2. Control Unit

    • Designed for safety and operator peace-of-mind

    • Visual indication when the circuit breaker has successfully changed positions

    • Self-test indication that device is working properly

    • Large push buttons to operate the motorized racking mechanism with or without gloves

  3. Control Cable

    • 30 ft. length allows operator to move outside of the arc flash boundary area during rack-out and rack-in procedures

    • Additional distance can be achieved by connecting multiple cables

  4. Power Cable

    • Can be used with any 120 Vac power source

Other items also included with portable device: alignment and drive installation tools, mounting bracket and drive shaft.

Control Unit

  1. LED Check

    Safely identify the control unit is in working order before operation

  2. Stop Release

    Safety feature that must be pressed before operation of motor. Notifies operator of cycle completion when light is extinguished

  3. Insert Circuit Breaker LED

    Notifies operator when racking mechanism is operating in insert mode

  4. Operate Motor

    To enhance safety, this button must be continuously pressed for the motor to operate

  5. Selector Switch for Racking Direction

    Simple selection of motor direction (shown in rack-out mode)

  6. Over-torque Reset

    Indicates over-torque condition by illuminating this yellow push button. The push button allows simple reset of device once condition is cleared

  7. Withdraw Circuit Breaker LED

    Notifies operator when racking mechanism is operating in withdraw mode

  8. Power (On/Off)

    Red illuminated button clearly indicates control unit is powered on

QR Code is a registered trademark of DENSO WAVE INCORPORATED in Japan and other countries.

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