PMX™ Modular Metal-Enclosed Switchgear
PMX™ Modular Metal-Enclosed Switchgear combines the solid features of S&C Custom Metal-Enclosed Switchgear with the size and economic benefits of S&C Pad-Mounted Gear. The pre-engineered modules are designed for easy assembly into switchgear lineups to suit a variety of applications.
With ratings of 13.8 and 25 kV, switching for both entrance and feeder modules is handled by the rugged S&C Mini-Rupter® Switch, offering up to 600 amperes full-load dropping and 25,000 amperes duty-cycle fault-closing operations.
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Features
Fault protection is provided by the full range of permanently accurate S&C Power Fuses including the S&C Fault Fiter® Electronic Power Fuse.
Each module is designed to withstand the rigorous “poke-and-pry” test required of all Pad-Mounted Gear (ANSI C57.12.28). This, combined with the low-profile and compact size, allows PMX Switchgear to be installed in areas accessible to the public without special site considerations.
PMX Switchgear features include:
- Fully-rated for 600 amperes main bus and up to 25 kA fault current — handles the switching and protection needs of most applications.
- Modular construction — any number of modules can be combined, along with metering or cable entrance modules, to create a lineup that’s right for your application.
- Enhanced fuse handling option — PMX Switchgear utilizes an adaptation of S&C’s patented TransFuser™ Fuse Mountings, which effortlessly unlatches and pivots to the open position, making the de-energized and isolated fuse accessible for replacement.
- Compartmentalization available — optional barriers separate cable termination sections from the main bus and switching sections.
- Ideal for remote supervisory and automatic source-transfer applications — entrance modules can be furnished with power-operated switches and Micro-AT® Source-Transfer Control or 6802 Automatic Switch Control.
- Easy to install, anywhere — with its compact size, siting PMX Switchgear is easy. It’s designed for outdoor installation, so valuable in-plant real estate isn’t needed. PMX Switchgear is 64" tall at 13.8 kV and 76" tall at 25 kV.
Ratings
| kV | Mini-Rupter Switch, Amperes | Fuse | Short-Circuit, Amperes, RMS, Sym. | ||||
|---|---|---|---|---|---|---|---|
| Nom. | Max | BIL | Main Bus | Load Dropping | Type | Amperes Max. | |
| 13.8 | 17.0 | 95 | 600 | 600 | SM-20, SME-20 | 200E |
14 000 |
| SM-4Z, SME-4Z | 200E | 12 500 | |||||
| Fault Fiter | 600 | 25 000 | |||||
| SM-40, SME-40 | 400E | 25 000 | |||||
| SM-5S | 400E | 25 000 | |||||
| 25 | 27 |
125 | 600 | 400 | SM-20, SME-20 | 200E |
12 500 |
| SM-4Z, SME-4Z | 200E | 9 400 |
|||||
| Fault Fiter | 600 | 25 000 | |||||
| SM-40, SME-40 | 400E | 20 000 | |||||
| SM-5S | 300E | 20 000 | |||||
For 50-Hz ratings, consult your nearest S&C Sales Office.
25-kV models equipped with SM-40 Power Fuses or Fault Fiter Electronic Power Fuses are rated 29 kV max.
SMU-20 Fuse Units are available in ratings through 200K as well as 200E amperes.
Rating is 12,500 amperes RMS symmetrical when applied on solidly grounded-neutral systems only with fuses connected by single-conductor, concentric-neutral type cable (or directly coupled) to a transformer or transformers.
Module Configurations
Manually-Operated
Entrance Module
Manually-Operated
Feeder Module
Through-Bus
Meter Module
Source-Transfer
Entrance Module
Remote-Supervisory
Entrance Module
Product Support
Literature
Application and Technical Information
Downloads
Visit S&C’s Automation Customer Support Portal for all automation product software support (including Matlink Software for Micro-AT® Source-Transfer Control), upgrades, patches, and additional technical documentation.