MEC38-Series 38kV Metal-Enclosed Vacuum Circuit Breaker Switchgear
Outdoor Medium Voltage Switchgear with Withdrawable Vacuum Circuit Breakers
APT's MEC38-Series vacuum circuit breaker switchgear engineered for critical power applications with the system voltages of 34.5 kV, 35 kV with maximum design voltage of 38 kV. Featuring withdrawable vacuum circuit breakers, modular compartmentalized construction, and advanced protective relaying, the MEC38-Series supports utility intertie, generator paralleling, source transfer, and power distribution applications.
APT 38kV Medium Voltage Switchgear
Switchgear for 35 kV Systems
Specifying 35 kV switchgear? APT’s MEC38-Series supports 34.5 kV and 35 kV systems with a maximum design voltage of 38 kV. Explore electrical ratings, enclosure options, and protection capabilities to determine the right configuration for your project.
Modular 38kV Switchgear Built for Critical Power Systems
APT's MEC38-Series 38 kV-class outdoor metal-enclosed medium-voltage switchgear features withdrawable vacuum circuit breakers, modular compartmentalized construction, and advanced protective relaying.
Engineered for critical power applications, the MEC38-Series incorporates an integrated structural skid that allows complete switchgear lineups to be factory-assembled, tested, and shipped as a single unit, minimizing on-site installation and commissioning time.
Designed for reliable operation and simplified maintenance, the MEC38-Series offers customizable protection, monitoring, and control capabilities to meet project-specific requirements.
Product configurations and optional equipment vary by application. Actual delivered equipment may differ from the image shown.
MEC38-Series Technical Specifications
Explore the electrical ratings, circuit breaker characteristics, and available configurations of APT's MEC38-Series 38kV class metal-enclosed medium-voltage switchgear.
Electrical System Ratings
| System Voltages | 34.5kV, 35kV |
|---|---|
| Maximum Voltage | 38kV |
| Power Frequency Withstand (1 Minute) | 80kV |
| Basic Impulse Level (BIL) | 150kV |
| Main Bus Ampacity | 600–4000A** |
| Bus Insulation |
Standard: Bare Optional: Insulated |
| Main Bus Material | Silver-Plated Copper |
| Main Bus Short-Time Withstand | 2 Seconds |
*Main bus ratings and available configurations are dependent on project requirements.
Vacuum Circuit Breaker Ratings
| Circuit Breaker Type | Withdrawable VCB (Standard) |
|---|---|
| Continuous Current Ratings | 600, 800, 900, 1200, 2000, 3000A** |
| Interrupting Capacity (Symmetrical) | 40kA |
| Short-Time Withstand | 40kA, 2 Seconds |
| Interrupting Time | 3 Cycles |
| Opening Time | Less Than 40ms |
| Operating Sequence | O-0.3s-CO-3min-CO |
**3000A circuit breaker configurations require increased switchgear depth.
Specifications and equipment configurations vary by application and project requirements. Optional features may not be available in every configuration. Contact APT for application-specific ratings and requirements.
Utility, Generator & Power Distribution Applications
The MEC38-Series supports a wide range of medium-voltage power applications, providing flexible switching, protection, and control configurations for utility, generation, and distribution systems.
Utility Intertie & Power Integration
Configurable incoming utility sections support utility intertie applications, voltage sensing, protective relaying, and power system monitoring. Available controls accommodate utility integration and power management requirements.
Generator Paralleling
Generator incoming sections can incorporate synchronizing controls, protective relays, and breaker configurations for generator paralleling applications. Available control solutions support generator integration and redundancy requirements.
Automatic & Manual Source Transfer
Manual and automatic transfer configurations are available for utility-to-generator, utility-to-utility, and generator-to-generator applications. Available operation modes include open transition, closed transition, delayed transition, and soft transition.
Medium Voltage Power Distribution
Distribution feeder and bus tie sections provide flexible power distribution configurations. Integrated CTs, PTs, and protective relaying support monitoring and protection, with provisions for future system expansion.
Advanced Monitoring, Protection & Control
APT offers integrated control and monitoring capabilities for MEC38-Series power systems, including digital protective relaying, advanced metering, master control panels, and APTView SCADA solutions. Available configurations support system monitoring, load management, and remote supervisory control.
Control features and availability depend on the selected system configuration and project requirements.
MEC38-Series Product Resources
Explore additional technical information about the MEC38-Series or contact APT to discuss your medium-voltage switchgear requirements with our team.
Download the MEC38-Series Brochure
The MEC38-Series brochure covers:
- Electrical system ratings
- Withdrawable vacuum circuit breaker details
- Switchgear construction
- Protective relaying
- Available control configurations
Request a Custom Switchgear Quote
Tell APT about your application so our team can review a suitable MEC38-Series configuration. Share the project details you have, including:
- Single-line diagram or lineup sketch, if available
- System voltage, required current ratings, and available fault current, if known
- Number of sources and feeder circuits
- Indoor or outdoor installation, site needs, and project schedule