Outdoor and indoor, AC & DC, Load break and make, Vacuum breaking
Live Line Insulators
Cable, pipe and line entries
Air Insulated Load Break Switches (AC/DC)
Outdoor (AC) Air Insulated Vacuum Switches
Vacuum Load Break
Rated 25AC for railway applications, 11KV to 36KV for Power Distribution
Rated for currents up to 2000A (with load make and break)
Flexible Design, 3 position switch and earth switch with one motor operator
Vacuum or oil filled interrupters for true load break switch capabilities
Condition monitoring unit voltage and current complete with directional fault indication.
Pole top disconnectors and load break switches are well known and utilised in all medium voltage networks. Each of these devices has a role during maintenance work, where they are used to isolate certain sections.
It is also common for the disconnector to have an earthing switch which will earth the line in certain positions. Load break switches are installed where switching under load is required. It is well known that load break switches have an air break chamber for extinguishing the arc and are restricted to a lifespan of 20 operations, after which, the air break interrupter must be replaced.
Our unit uses a Vacuum interrupters allow switching of currents up to 2000A with well over 1000 operations without any requirement for replacements.
Motor operators can be used for remote switching and gathering data from the field.
Enclosed AC Air Insulated Vacuum Load Break Switches (AIS)
Vacuum Load Break
Rated for 11kV to 36kV (25kV AC)
Rated for currents up to 2000A (with load make and break, 1250A available)
With a making capability of 16kA
Flexible design, 3 position load break switch and optional earth switch.
Vacuum interrupters for true load break switch capabilities.
Arc extinguishing vacuum bottle technology, removes the unnecessary risks of gas (GIS) in tunnels.
Option for condition monitoring unit voltage and current complete with directional fault indication.
A Safer alternative to GIS for Catenary Switching, the enclosed 25kV Vacuum load break Switch, utilizes safe advanced vacuum technology, with high reliability. Not only does it allow for Quick and Easy installation, it also provides the minimum whole of lifecycle cost when compared to other equipment. Even considering the upfront installation costs, when ongoing maintenance, site visits and unnecessary repairs are taken into consideration, this quickly becomes not only the safest, but the best value option.
Designed for Reliability and Low Maintenance
Driescher's vertically operated switches are designed for reliability and have an operational lifetime of 10,000 mechanical switching cycles, with minimal maintenance.
For Tunnel Switching it is important to provide and preserve;
No Arcing is permitted inside tunnels
Opening/Closing of Switches within Vacuum Chamber
Very limited space in tunnel substations, footprint should not exceed existing GIS panels.
Due to the difficulty carrying out maintenance inside rail tunnels.
No risk of SF6 gas leaks
Safer, air-insulated switchgear, removes any detrimental outcomes SF6 could create.
Clear Visual confirmation of Switch position
Window on panel enables operators to visually confirm switch operation and position.
Completely safe cubicle to meet safety regulations
Panel can be touched, doors opened, operated manually by hand crank, etc.
Using the same proven highly reliable 25kV load break switch (Fla 15/97) switch and motor operation used with Australian AC Rail operators.
DC Disconnectors are used throughout the rail network. Our disconnector/isolators are capable of both fault make and break and we have a number of special configurations for and unique designs for tunnelling that commonly see our DC isolators used in rail electrification projects around the globe.
Switches, Isolators, earth switches and combinations
Our switch disconnectors combine the functions of a switch and a disconnector in one device. As such, they are used for breaking load currents and have a short circuit making capability.
In combination with fuses, switch disconnectors can also be used to break short-circuit currents. The short-circuit current is interrupted by the fuses. Subsequently, the fuses trip the three poles of the switch disconnector, separating the faulty feeder from the power system.
Arc-Extinguishing Principle In switch disconnectors, the arc is not extinguished in a vacuum interrupter or SF6, but instead, operates according to the principle of a hard-gas switch. Effectively, the arc splits off some gas from an insulating material which surrounds the arc closely. This gas quenches the arc promptly and effectively. As the material providing the gas cannot regenerate itself, the number of operating cycles is significantly lower than that of the vacuum interrupters.
Nevertheless, according to the hard-gas principle, switch disconnectors are the most frequently used item in many industries, as they have a good cost per performance relationship and give the customer a visual isolation point.
DC Disconnectors are used throughout the rail network. Our disconnector/isolaters are capable of both fault make and break, and we have a number of special configurations, and unique designs for tunnelling that commonly see our DC isolators used in rail electrification projects around the globe.
Our range of motor operators is designed to enable remote control and monitoring of air insulated switches and disconnectors.
There are two versions, one each for indoor and outdoor use. The outdoor version is in an IP65 rated stainless steel enclosure, fully vented and suitable for any environmental conditions. The motor operators can be used for either horizontally or vertically operated switches, for newly installed switches, or for retrofit on existing switches. Control voltages can range between AC/DC from 24V to 230V. The wiring logic has all the inbuilt safety features, as well as a manual override feature. All of our motor operators are very compact and designed to be compatible with all manufacturers’ disconnectors and earth switches.