High-performance Hybrid Switchgears-72.5-245kV

Product Description

The term “Hybrid” refers to the combination of both conventional air insulated switchgear (AIS) and the newer SF6 metal-clad insulated switchgear (GIS), which takes advantage of the two different technologies. The Hybrid switchgear solution uses already existing, tried-and-tested gas insulated switching components but also a conventional and very reliable AIS bus to connect the various hybrid modules.All the functions (except the ring type current transformers) are sealed in a single SF6 gas insulated housing:

• Circuit Breaker
• Disconnectors
• Earth switches
• Cable sealing ends
• Fast earthing switches
• SF6 VTs or voltage sensor
• Control and protection cabinet.

PASS could also be called “Performance And Save Space” as any substation layout can be obtained by making effi cient use of the available space.

Advantages

PASS combines all the typical functions of a complete AIS bay for electrical substations with voltage ratings of up to 245 kV in a unit whose volume is comparable to that of a conventional circuit-breaker of equal class.
It takes advantage and widens the scope of the operating philosophy of the PASS series whose dominating factors, those that have dictated the product’s success with more than 2000 systems sold
throughout the world, are briefl y outlined below:

1.Relatively inexpensive AIS bus bar.
- Yet traditionally highly reliable.
2. All live contacts in SF6.
- Experience has shown that AIS disconnector switch contacts require relatively high levels of maintenance whereas the experience with GIS has been exactly the opposite.
- SF6 technology means less ongoing maintenance.
- Highly reliable equipment leading to a lower global life cycle cost

3. Fewer switching elements.
- Use of highly reliable GIS style switches allows the switching elements to be rationalized.
4. Per-tested in Factory also for earthquake.
5. Competitive installation cost:
- time on site minimized
- less risk of delay due to adverse site conditions
- less demand for skilled resources at site.
6. High degree of factory assembly.
- Higher quality fi nished bay than if it was assembled under site conditions
7. Facilitates monitoring / on-line diagnostics.
- Integrated nature of the plant facilitates the introduction of electronic monitoring and on-line remote diagnostic analysis
8. Modularization of the substations:
- savings during the design and construction phases
- minimal variations using standardized components
- less risk of design errors
- higher confi dence in project estimation as costs are predictable.
That means:
- very high reliability and availability of the substation
- drastic reductions in the time needed to install the equipment
- much less space required
- simplifi ed substation layout
- less maintenance required (maintenance on demand)
- very good cost performance for purchasing, maintenance, operation, outage and relocation
- environmentally friendly: recycling / disposal at end of life.
Versatile operation
PASS features versatile operation that knows no rivals in the fi eld of high voltage components.
PASS offers a series of modules for HV substations:
■ single bus bar (SBB)
■ double bus bar (DBB)
■ double Circuit Breaker (DCB), not available on PASS M00.
PASS can also be used as a high voltage bay on a mobile truck, available for emergencies or if work must be carried out on already installed HV bays.  

Product Parameters