The secondary medium-voltage cabins approved according the ENEL specification GSCM004are designed and built in compliance with the distributor’s technical specifications, ensuring the highest levels of safety, reliability, and continuity of service in electricity distribution. Each solution is developed to guarantee ease of installation, accessibility for operation and maintenance activities, and full compatibility with ENEL networks.
Imesa switchgears are built using certified materials and high-quality components, subjected to rigorous inspections and testing, and can be supplied in various configurations depending on application requirements and the specifications of the grid operator.
- Vacuum circuit breakers.
- Air-insulated earthing switches.
- Air-insulated rotary line disconnectors.
- Dry-air-insulated switch disconnectors.
Electrical and construction characteristics
| Rated Voltage (Ur) | 24 kV |
| Power-frequency withstand voltage to earth (Ud) | 50 kV |
| Lightning impulse withstand voltage to earth and between phases (Up) | 125 kV |
| Rated frequency (fr) | 50 Hz |
| Rated thermal current of main busbars (lr) | 630 A |
| Rated short-time withstand current (lk) | 16 kA |
| Peak short-time withstand current (lp) | 40 kA |
| Rated short-circuit duration (tk) | 1 s |
| Internal arc classification | IAC |
| Accessibility type | AFL |
| Arc test current (la) | 16 kA |
| Arc test duration (ta) | 1 s |
| Degree of protection (excluding operating mechanisms) | IP3X |
| Rated filling pressure of insulating gas (abs.) | 1,1 bar |
| Minimum filling pressure of insulating gas (abs.) | 1,0 bar |
| Annual relative leakage rate | 0,1 % |
Main features of the GSCM004 Enel approved switchgear
- ENEL approval for secondary medium-voltage substations
- Compact structure for optimized installation space
- Configuration designed for easy integration into the distribution network
- High safety standards for operators and equipment
- Version with internal arc classification (AFL)
- Protection degree IP3X
- Suitable for wall-mounted installation
- Ease of installation, operation, and maintenance
- Product certifications, type tests, and acceptance tests in accordance with ENEL specifications.
Fields of application
The ENEL-specific GSCM004 switchgears are used in secondary medium-voltage electrical distribution and can be easily installed in substations to manage and protect supply lines, metering equipment, and transformers.
- Industrial plants
- Infrastructure and public services: hospitals, airports, railway stations, water treatment plants, telecommunications networks, and strategic infrastructure.
- Civil and commercial construction: shopping centers, residential complexes, offices, hospitality facilities, and business premises.
- Energy systems and utilities: local distribution networks, energy management and control systems, applications for distribution companies and multi-utilities.
- New connections and grid upgrades: construction of new connections to the ENEL network or adaptation of existing systems for power increases or regulatory updates.
Standard references
The equipment complies with the following standards:
- GSCM004, Rev.1 – 10/2022
- CEI EN 62271-200, Ed. 3 – 05/2021
- IEC 62271-1, Ed.2 – 07/2017
- IEC 62271-102, Ed.2 – 05/2018
- DMI 031082, Ed.3 dated 18/06/2014
- DMI 031015, Ed.4 dated 14/07/2015
- DMI 031052, Ed.3 DATED 28/02/2014
In particular, the ENEL approved switchgears can be classified as:
- Service Continuity: LSC2A
- Diaphragm Classification: PM
Internal arc: IAC AFL (on request only)
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