PASS M0 is the line of the PASS product family which covers voltages from 110 kV to 170 kV and amperages up to 50 kA; it is the most widespread PASS module, with more than 6500 installations all around the world.
It is available in three configurations:
- Single Bus Bar (SBB)
- Double Bus Bar (DBB)
- Double Circuit Breaker (DCB)
And two versions:
- Classic
- Rotating Chamber
Technology
The PASS family of switchgear modules takes advantage of a Hybrid technology solution: on the one side it uses reliable Air Insulated connections between modules; on the other side it encloses the bay functions in a single phase Gas Insulated housing, fully-comprehensive of:
- Circuit breakers
- Disconnector
- Earthing switches (fast or slow)
- Voltage transformers and Voltage sensors
- Current Transformers
- Bushings or Cable enclosures
Advantages
High customizability yet short delivery time, due to the modular design of PASS modules and the implementation of Just In Time - Assemble To Order production models
High reliability, due to the use of standard components continually reduced in number
Few installation space requirements, due to the completeness of functions enclosed in one single PASS module
Fast erection and commissioning, due to the fully-assembled configuration of the modules during transport
Life cycle cost significantly lower than AIS or GIS technologies
PASS M0 Classic
Design
The Circuit Breaker is activated by three single-phase or one three-phase self-blast type spring loaded drive.
The Disconnector and Earth switch are integrated in one single mechanism; the contacts are mounted on the corpus of the module and on its internal rotating shaft, which movement allows shifting between the possible configurations of the module.
The Classic PASS modules offer the flexibility made possible by the use of one dedicated shaft and drive per three-phase disconnector and earth switch device.
The Gas insulated Bushings are made of an epoxy impregnated fiberglass tube and silicon rubber sheds, which are hydrophobic, don’t require maintenance and are resistant to mechanical stress.
Technical data
| Encapsulation | Single phase |
| Rated voltage | up to 170 kV |
| Rated frequency | 50/60 Hz |
| Rated power frequency withstand voltage | 210 kV |
| Rated current | 3150 A |
| Rated breaking current | 50 kA |
PASS M0 Rotating Chamber
Design
The Circuit Breaker is activated by three single-phase or one three-phase self-blast type spring loaded drive.
The Disconnector and Earth switch are integrated in one single mechanism; the contacts are mounted on the corpus of the module and on its internal rotating shaft, which movement allows shifting between the possible configurations of the module.
In the new Rotating Chamber modules all the Disconnector and Earth switch devices are all operated by one single internal shaft and one three-phase drive, thus reducing the number of internal components and increasing reliability.
The Gas insulated Bushings are made of an epoxy impregnated fiberglass tube and silicon rubber sheds, which are hydrophobic, don’t require maintenance and are resistant to mechanical stress.
Technical data
| Encapsulation | Single phase |
| Rated voltage | up to 170 kV |
| Rated frequency | 50/60 Hz |
| Rated power frequency withstand voltage | 375 kV |
| Rated current | 3150 A |
| Rated breaking current | 50 kA |