Factories and processing plants
Incomers, feeders and bus couplers at 11 kV and below, with motor and transformer feeders.
Switchgear
MV industrial switchgear, compact and configurable.
Medium voltage switchgear from 3.6 to 40.5 kV for industrial and commercial switchrooms and private networks.
Fixed and withdrawable cubicles in standard, compact and miniaturised sizes, plus load switch and fuse units, so each switchroom gets the arrangement and footprint it needs.
- Voltage class
- 3.6 to 40.5 kV
- Rated current
- 630 to 3,150 A
- SC breaking current
- Up to 40 kA
- Construction
- Fixed, drawout
The range
MV industrial switchgear is configured cubicle by cubicle for incomers, feeders, transformer and motor feeders, bus couplers and metering.
Fixed Type, 3.6 to 12 kV
Box type fixed cubicles for single busbar, sectionalised and bypass busbar systems, rated 630 A to 3,150 A and 20 to 40 kA, with fixed vacuum circuit breakers and mechanical interlocking.
Miniaturised Fixed Cubicles
Cubicles 800 mm wide by 900 mm deep, and 700 mm wide by 950 mm deep with a small three position vacuum circuit breaker rated 630, 1,000 or 1,250 A, for incomers, feeders and bus couplers where space is tight. They also suit connection to ring main cabinets.
Compact Withdrawable Cubicles
Withdrawable 12 kV cubicles 650 mm wide by 1,500 mm deep, and a miniaturised 800 mm by 1,300 mm by 1,885 mm cubicle rated 630 A to 1,250 A, used as incomers and bus couplers with ring main units and consolidated cabinets, or on their own for power distribution.
Load Switch and Fuse Units, 40.5 kV
Combined load switch and fuse units rated 630 A to 1,250 A with a 100 A fuse and 31.5 kA prospective short circuit breaking current, for 35 kV systems, including wall mounted installation in wind turbine towers or as stand alone units in packaged substations.
Outdoor Switch Stations, 12 kV
Load switch or circuit breaker cubicles with primary and secondary equipment in an outdoor enclosure, for placement beside streets, in parks, residential areas, industrial parks and commercial centres.
Specifications
Typical ratings for the standard range. Final values are confirmed for each project.
Customised designs available. If your project needs ratings, features, design requirements or arrangements outside the standard range below, we design and manufacture to your requirements and application.
Technical dataMV industrial switchgear
| Parameter | Standard | Optional or on request |
|---|---|---|
| Rated voltage | ||
| Fixed and withdrawable cubicles | 3.6 to 12 kV | |
| Load switch fuse unit | 40.5 kV | |
| Rated frequency | 50 Hz | |
| Rated current | ||
| Fixed cubicles | 630 to 3,150 A | |
| Miniaturised cubicles | 630 to 1,250 A | |
| Short circuit breaking current | 20, 25, 31.5 or 40 kA | |
| Thermal stability current (4 seconds) | 20, 25, 31.5 or 40 kA | |
| Dynamic stability current | 50, 63, 80 or 100 kA | |
| Short circuit closing current | 50, 63, 80 or 100 kA | |
| Degree of protection | ||
| Fixed cubicles | IP2X | |
| Withdrawable cubicles | IP4X enclosure, IP2X compartments | |
| Cubicle size, fixed, 1,600 A and below | ||
| Width | 1,100 mm | |
| Depth | 1,200 mm | |
| Height | 2,650 mm | |
| Cubicle size, fixed, 2,000 A and above | ||
| Width | 1,200 mm | |
| Depth | 1,200 mm | |
| Height | 2,650 mm | |
| Cubicle size, miniaturised fixed, 1,600 A and below | ||
| Width | 800 mm | |
| Depth | 900 mm | |
| Height | 1,900 mm | |
| Cubicle size, miniaturised fixed, 1,250 A and below | ||
| Width | 700 mm | |
| Depth | 950 mm | |
| Height | 1,900 mm | |
| Cubicle size, withdrawable | ||
| Width | 800 or 1,000 mm | 650 mm compact; 800 mm miniaturised |
| Depth | 1,500 or 1,700 mm | 1,500 mm compact; 1,300 mm miniaturised |
| Height | 2,300 mm | 1,885 mm miniaturised |
| Rated current, load switch fuse unit (40.5 kV) | ||
| Load switch | 630 to 1,250 A | |
| Fuse | 100 A | |
| Power frequency withstand voltage, 40.5 kV | ||
| Phase to earth | 95 kV | |
| Across isolating distance | 118 kV | |
| Lightning impulse withstand voltage, 40.5 kV | ||
| Phase to earth | 185 kV | |
| Across isolating distance | 215 kV | |
| Prospective breaking current, 40.5 kV | 31.5 kA | |
| Mechanical life, load switch fuse unit | ||
| Load switch | At least 10,000 operations | |
| Isolating and earthing switch | At least 3,000 operations | |
Design and performance
MV industrial switchgear is chosen for footprint, ease of installation and maintenance, and the interlocking that keeps operators safe.
Mechanical Interlocking
Fixed cubicles carry a five function mechanical interlock that prevents mal operation, with fixed vacuum circuit breakers selected to suit the project.
Compact Footprint
Miniaturised and 650 mm wide compact cubicles fit switchrooms where a standard switchboard cannot, and join to ring main and consolidated cabinets for incomers and bus couplers.
Corrosion Resistant Construction
Cabinet bodies are folded from aluminium zinc coated steel with a double folded side frame, giving strong resistance to oxidation and corrosion and good mechanical strength.
High Breaking Capacity, Low Cut Off
The three position vacuum circuit breaker in miniaturised cubicles has a high breaking capacity and low cut off current, suited to systems with larger short circuit fault currents.
Self Developed Spring Mechanism
The load switch fuse unit uses a spring operating mechanism developed in house, with simple, reliable operation.
Applications
Delstar supplies industrial switchgear for:
Mining and heavy industry
Process and motor feeders where cubicles can be fitted into a switchroom of any size.
Commercial buildings, hospitals and data centres
Compact and miniaturised cubicles where switchroom space is limited.
Wind farms and renewable generation
Wall mounted units and compact cubicles inside turbine towers and packaged substations.
Packaged substations and outdoor switch stations
Compact cubicles, 33 kV load switch fuse units and outdoor stations beside streets, in parks and commercial areas. For utility kiosk and ring main applications see Ring main units.
Sourcing and quality assurance
Our industrial switchgear is produced in a factory that holds ISO 9001, ISO 14001 and ISO 45001 certification. Cubicle bodies are CNC punched and folded, and finished on an automated powder coating line. Type test reports are available for the range.
For ring main applications see Ring main units. Delstar delivers to site across New Zealand, Australia and the Pacific.
Lifecycle support
- Specification and configuration: we help select cubicle types, breaker ratings and the arrangement for your switchroom.
- Installation and commissioning: see Installation and commissioning.
- Training and demonstration: hands on training or demonstrations at your workshop or facility, provided through our engineering services.
- Spares and asset management: spares and ongoing support through our asset management service.
Talk to our team
Specify your industrial switchgear requirement.
Tell us the voltage class, rating and installation environment, and any customised requirement. We will match the specification to the right configuration, or design and manufacture to suit.