Switchboards and distribution boards
Feeder devices and busbar for panel builders and LV assemblies.
Switchgear
LV fuse switch disconnectors and busbar systems.
Modular low voltage busbar systems with fuse switch disconnectors, switch disconnector fuses and circuit breaker adapters for switchboard and distribution board assemblies.
Every device mounts to one 185 mm busbar system behind a touch safe covering, so fuse, switched and circuit breaker feeders sit side by side in one panel.
- Fuse sizes
- NH00 to NH3
- Fuse rating
- 160 to 630 A
- Breaker adapters
- Up to 1,600 A
- Busbar cover
- IP4X
The range
One busbar system carries every device in the panel, so the feeders are chosen for the duty rather than the busbar.
NH in Line Fuse Switch Disconnectors
Devices for NH (HRC) fuses from size NH00 to NH3, covering 160 to 630 A fuses, mounted directly on the busbar with one or three pole switching and cable outgoing at the top or bottom. A double size 3 strip carries up to 1,250 A, for the secondary side of a transformer. Electronic fuse monitoring or an LED fuse indicator is available on every size.
Switch Disconnector Fuses
Sizes NH00 to NH3 with a snap switching mechanism that operates at a defined speed whatever the operator does, and opens both fuse contacts for a double break. The utilisation category suits motor and other inductive loads, and the units are suitable as a supply circuit disconnecting means. The deeper versions can be operated through a closed panel door, with a flag indicator showing the switching state.
Circuit Breaker Adapters
Adapters that mount circuit breakers on the busbar, for 400, 630, 800, 1,000, 1,250 and 1,600 A, with connection at the top or bottom. A compact 150 mm wide adapter covers breakers to 630 A. Mounting plates are drilled for the common breaker makes, and current transformers can be built into the adapter for energy metering.
Busbar Supports, Covers and Connection Modules
Supports for undrilled flat copper busbars, covering modules in 50 and 100 mm widths, rear base plate profiles, and terminal strips and modules for round conductors, cable lugs and laminated copper bars, taking up to 1,600 A directly onto the busbar.
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 dataLV fuse switch disconnectors and busbar systems
| Parameter | Standard | Optional or on request |
|---|---|---|
| Busbar system | ||
| System | 185 mm | |
| Flat busbars | Tinned copper, 30 to 120 mm wide by 10 mm thick | |
| Touch protection | IP4X covering system, with phase partitions | Rear base plate profiles |
| Mounting | Drill free clamp, or bolted to drilled busbars | |
| NH fuse switch disconnectors | ||
| Sizes | NH00 to NH3 | |
| Fuse rating | 160 to 630 A | Up to 1,250 A with double size 3 |
| Switching | One or three pole | |
| Cable outgoing | Top or bottom | |
| Terminal arrangement | Box terminal or drawer type, nut or stud bolt | Terminal compartment covers |
| Monitoring | Electronic fuse monitoring; LED fuse indicator; lid position signalling | |
| Metering | Built in current transformers | |
| Locking | Padlock closed and open positions | Lead sealing |
| Switch disconnector fuses | ||
| Sizes | NH00 to NH3 | |
| Switching mechanism | Snap action, double break | |
| Utilisation category | AC-23B | |
| Cable outgoing | Top or bottom | |
| Padlock shackle | Up to 7 mm (NH00); up to 8 mm (NH1 to NH3) | Cover lock with panel key; sealing |
| Monitoring and metering | Switch state flag indicator | Fuse monitoring; built in current transformers |
| Circuit breaker adapters | ||
| Rated current | 400, 630, 800, 1,000, 1,250 or 1,600 A | |
| Compact adapter | 150 mm wide, up to 630 A | |
| Connection | Top or bottom | Top or bottom with phase rotation |
| Protection | IP2X terminal shrouds | |
| Current transformers | Class 1, 5 A secondary, 250 to 1,600 A | |
| Connection components | ||
| Direct to busbar | Up to 1,600 A | |
| Conductor terminals | Copper and aluminium, up to 400 mm² (strips) or 300 mm² (modules) | |
| Cable lugs | 3 × 240 mm² or 2 × 300 mm² per strip | 4 × M12 lugs per module |
| Flat conductor | Laminated copper bar, up to 80 mm wide | Two bars, 2 × 80 × 10 mm |
Design and performance
A busbar mounted system is chosen for how quickly a panel is built, how safe it is to work on, and how easily it changes later.
Mount on a Live Busbar
Clamp mounting means devices can be fitted or removed on an energised busbar system by qualified personnel, so a panel can be extended without a shutdown.
No Drilling
Devices clamp onto the covered busbar without drilling the copper, which saves time in the workshop and keeps the busbar intact.
Touch Safe From the Start
Covering modules, partition plates and rear base plate profiles keep live parts protected from the front, the rear and between phases, with the covers acting as a positioning guide for each device.
Compact and Well Ventilated
Strips mount vertically with no gaps between them, and a ventilation duct between neighbouring units draws heat and switching gases upwards. That reduces mutual heating and removes the need for arcing chambers.
Locked, Sealed and Monitored
Padlocks, a panel key cover lock, lead sealing and optional fuse monitoring protect against unauthorised operation and show fuse condition without opening the unit.
One Busbar, Mixed Devices
Fuse switches, switch disconnectors and circuit breakers share a single busbar, so changes and extensions later are a matter of adding a strip.
Applications
Delstar supplies LV fuse switch disconnectors and busbar systems for:
Transformer secondary connections
Double size 3 strips and terminal strips for the LV side of a transformer.
Motor and inductive loads
Switch disconnector fuses in utilisation category AC-23B.
Retrofits and extensions
Adding or changing feeders on an existing busbar without drilling.
Energy monitoring
Built in current transformers for metering at the feeder.
Sourcing and quality assurance
Our LV fuse switch disconnectors and busbar systems are sourced from an established European manufacturer with more than 40 years of busbar system design behind it. Delstar delivers to site across New Zealand, Australia and the Pacific.
Lifecycle support
- Specification and configuration: we help select fuse sizes, adapters and connection components for your panel.
- 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 busbar and fuse switch requirement.
Tell us the current rating, fuse sizes and breaker types, and how the panel is arranged. We will match the components to the right configuration.