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PMH stands for Pad-Mounted Heavy Duty, a type of switchgear housing used for 3-phase underground distribution switching. It is a live-front switch with directly accessible components that are readily visible during operation. PMH Pad-Mounted Gear is offered in manual, remote supervisory, and source-transfer models, all of which are available in ratings of 14.4 and 25 kV.
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What You'll Learn
- PMH is pad-mounted heavy-duty switchgear housing
- PMH pad-mounted gear is available in manual, remote supervisory, and source-transfer models
- PMH pad-mounted gear features readily accessible and visible components
- PMH pad-mounted gear is available in ratings of 14.4 and 25 kV
- PME (pad-mounted elbow) is the dead-front option, while PMH is live front
PMH is pad-mounted heavy-duty switchgear housing
PMH stands for "pad-mounted heavy-duty" switchgear housing. This type of switchgear is typically used for 3-phase underground distribution switching. It is designed for underground switching and fusing protection for the distribution grid.
PMH pad-mounted gear incorporates S&C Mini-Rupter Switches and S&C power fuses with Uni-Rupter Interrupters in free-standing, self-supporting enclosures. This allows for tailored medium-voltage switching and protection packages for underground distribution applications. The "live-front" design of the PMH pad-mounted gear features directly accessible components that are readily visible during the operation of the gear. Operating status can be easily confirmed through visible gaps and grounds.
PMH pad-mounted gear is available in manual, remote supervisory, and source-transfer models. The manual model is recognized for its exceptional features and long-term value, offering readily accessible components and circuit configurations to fit every requirement. The remote supervisory model features carefully integrated components that ensure compatibility, with factory assembly for ease of use. This model includes a choice of remote terminal units and communication devices, built-in voltage sensors, and power supply to minimize enclosure size and installation costs.
The source-transfer model includes features such as the S&C Micro-AT Source-Transfer Control, which provides automatic transfers on loss of source, voltage unbalance, or any source-side open-phase condition. It is easy to set up, with all settings being keypad-programmable and automatic calibration. This model can also be furnished with an optional communications card to rapidly upload event logs to a PC and download standard settings. It includes built-in voltage sensors and power supply, Mini-Rupter Switches for manual and automatic switching, and Uni-Rupter Interrupters for single-pole switching of tap circuits, with comprehensive tap protection provided by a wide variety of fuses.
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PMH pad-mounted gear is available in manual, remote supervisory, and source-transfer models
PMH stands for Pad-Mounted Heavy-duty. PMH pad-mounted gear is a type of switchgear housing typically used for 3-phase underground distribution switching. It is available in three models: manual, remote supervisory, and source-transfer.
Manual PMH Pad-Mounted Gear
The manual model is available in ratings of 14.4 and 25 kV and features readily accessible components. It includes Mini-Rupter Switches, which are operated by an external handle, for 600-ampere three-pole switching of source circuits. It also incorporates Uni-Rupter Interrupters for 200-ampere single-pole switching of tap circuits. Dual-purpose barriers protect against inadvertent contact with live parts and provide isolation from bus and upper contacts.
Remote Supervisory PMH Pad-Mounted Gear
The remote supervisory model also comes in ratings of 14.4 and 25 kV. It features integrated components that ensure compatibility and is factory-assembled. This model includes a remote terminal unit, such as S&C's 6800 Automatic Switch Controls, which provide stand-alone automatic sectionalizing. It also offers the IntelliTeam® SG Automatic Restoration System and a choice of communication devices. The remote supervisory model includes built-in voltage sensors and power supply, minimizing enclosure size and installed cost.
Source-Transfer PMH Pad-Mounted Gear
The source-transfer model is recognized for its exceptional features and long-term value. It includes the S&C Micro-AT® Source-Transfer Control, which transfers on loss of source, voltage unbalance, or any source-side open-phase condition. This model is easy to set up, with keypad-programmable settings and automatic calibration. It features built-in voltage sensors and power supply, eliminating the need for external wiring or control power. The source-transfer model also incorporates Mini-Rupter Switches and Uni-Rupter Interrupters for manual and automatic switching, as well as comprehensive tap protection through a range of fuses.
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PMH pad-mounted gear features readily accessible and visible components
PMH stands for Pad-Mounted Heavy Duty. PMH pad-mounted gear features readily accessible and visible components. S&C's PMH Pad-Mounted Switchgear features directly accessible components. The components are readily visible, and the operating status can be easily confirmed by visible gaps and grounds.
S&C's "live-front" PMH Pad-Mounted Gear features directly accessible components that are readily visible during operation of the gear. Operating status is easily confirmed through visible gaps and grounds. PMH Pad-Mounted Gear is offered in manual, remote supervisory, and source-transfer models.
S&C Manual PMH Pad-Mounted Gear is available in ratings of 14.4 and 25 kV, with switches and fuses in circuit configurations to fit every requirement. Recognized throughout the industry for their exceptional features and long-term value, Manual PMH models include readily accessible components.
S&C Remote Supervisory PMH Pad-Mounted Gear permits automated switching and provides fault protection. It incorporates the same outstanding features as S&C Manual PMH Pad-Mounted Gear and can be specified with a communication and control equipment group for a completely integrated, self-powered switching and protection package. Available in ratings of 14.4 and 25 kV, Remote Supervisory PMH Pad-Mounted Gear features carefully integrated components that ensure compatibility—all factory-assembled and checked-out.
S&C Source-Transfer PMH Pad-Mounted Gear is a completely self-contained package that provides automatic switching between two sources serving critical loads. It incorporates the same outstanding features as Manual PMH Pad-Mounted Gear, plus stored-energy operators and a sophisticated source-transfer control, which continuously monitors source status and automatically switches to the “good” source if voltage is lost. Available in ratings of 14.4 and 25 kV, Source-Transfer PMH is recognized throughout the industry for its exceptional features and long-term value.
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PMH pad-mounted gear is available in ratings of 14.4 and 25 kV
PMH stands for "pad-mounted heavy duty" and is a type of switchgear housing typically used for 3-phase underground distribution switching. PMH pad-mounted gear is available in ratings of 14.4 and 25 kV. This gear incorporates S&C Mini-Rupter Switches and S&C power fuses with Uni-Rupter Interrupters in free-standing, self-supporting enclosures.
The 14.4 and 25 kV ratings are available for several types of PMH pad-mounted gear, including manual, source-transfer, and remote supervisory models. Manual PMH pad-mounted gear offers readily accessible components, allowing operating personnel to easily visualize the circuitry and see all components during operation. Source-transfer PMH pad-mounted gear provides automatic switching between two sources serving critical loads and includes features such as S&C Micro-AT Source-Transfer Control and built-in voltage sensors. Remote Supervisory PMH Pad-Mounted Gear permits automated switching and fault protection and can be specified with communication and control equipment for a fully integrated system.
PMH pad-mounted gear is designed to provide medium-voltage switching and protection for underground distribution applications. The gear's live-front design features directly accessible components that are readily visible during operation, making it easy to confirm the operating status through visible gaps and grounds. The gear is recognized in the industry for its exceptional features and long-term value, offering circuit configurations that can be tailored to diverse requirements.
Overall, the availability of PMH pad-mounted gear in 14.4 and 25 kV ratings offers flexibility and reliability for underground distribution applications, ensuring compatibility and providing a range of features to meet specific needs.
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PME (pad-mounted elbow) is the dead-front option, while PMH is live front
PMH stands for Pad-Mounted Heavy Duty. PME (Pad-Mounted Elbow) and PMH are different types of pad-mounted switchgear housing, typically used for 3-phase underground distribution switching.
The original edition of the product line was PMS (Pad Mounted Standard). The next version was PMH (Pad-Mounted Heavy Duty). Both of these were live-front switches. The final version was the dead-front option, PME (Pad-Mounted Elbow).
S&C's "live-front" PMH Pad-Mounted Gear features directly accessible components that are readily visible during the operation of the gear. Operating status is easily confirmed through visible gaps and grounds. PMH Pad-Mounted Gear is offered in manual, remote supervisory, and source-transfer models. The manual PMH model includes readily accessible components and is available in ratings of 14.4 and 25 kV, with switches and fuses in circuit configurations to fit every requirement.
On the other hand, PME Pad-Mounted Gear's dead-front design keeps crew members shielded from potentially harmful voltage, as it has no exposed energised parts. The elbow-style connections further reduce exposure to live components. The viewing windows allow crews to check the switchblade position at a distance. PME Pad-Mounted Gear is also available in ratings of 14.4 and 25 kV, with switches and/or fuses in circuit configurations to fit every requirement.
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Frequently asked questions
PMH stands for Pad-Mounted Heavy Duty. It is a type of switchgear housing typically used for 3-phase underground distribution switching.
PME stands for Pad-Mounted Elbow and utilises dead front, elbow-based construction and connections. On the other hand, PMH is live front.
PMH Pad-Mounted Gear is available in ratings of 14.4 and 25 kV.
PMH Pad-Mounted Gear incorporates S&C Mini-Rupter Switches and power fuses with Uni-Rupter Interrupters. It is offered in manual, remote supervisory, and source-transfer models.
