Papua New Guinea FBARB Outdoor Box-Type Switchgear Station

Outdoor Anti-Corrosion Enclosure System

The enclosure is fabricated from thickened aluminum‑zinc coated steel sheets using CNC bending, featuring a double‑layer thermal insulation structure and both interior and exterior weather‑resistant, anti‑corrosion coatings. The unit achieves an overall protection rating of IP33 and comprises separate high‑voltage switchgear compartments, cable rooms, and secondary instrument rooms, with metal partitions between each compartment and built‑in pressure‑relief explosion‑proof vents. Standard equipment includes dual‑circuit anti‑condensation heaters, making it suitable for outdoor environments characterized by extreme temperatures, high humidity, and significant diurnal temperature variations. A multi‑door configuration allows maintenance access from the front, rear, and sides, providing ample operating space.

FBAIR Environmental Gas-Insulated Main Switchgear Unit

Internally, it employs an SF6‑free, environmentally friendly gas‑insulated module, featuring a three‑position load switch/vacuum circuit breaker in a modular configuration. Optional configurations include ring‑main units, circuit‑breaker protection units, PT metering units, and grounding units. The gas compartment exhibits an extremely low annual leakage rate, eliminating the need for gas replenishment throughout its entire service life. It supports both spring‑operated manual and electric actuation mechanisms, offering long mechanical life and stable make‑and‑break performance.

Intelligent Secondary Surveillance System

Equipped with a MACOM smart measurement and control device, it integrates voltage and current acquisition, fault indication, live‑line display, and remote switch‑on/off functions. It supports MODBUS, IEC 60870‑104, and IEC 61850 communication protocols, enabling seamless integration with the distribution automation master station. The local panel features single‑line diagram display, fault waveform recording, event logging, and audible/visual alarms, and supports both local and remote operation modes.

Comprehensive safety interlock system

Full‑set five‑protection mechanical interlocks: prevent load‑carrying opening and closing, closing with the earthing switch engaged, closing the earthing switch under voltage, unauthorized entry into energized compartments, and unintended opening or closing. The switchgear room door is mechanically interlocked with the main switch; the cable compartment door cannot be opened for maintenance when energized. Optional safety accessories include rapid grounding switches, surge arresters, zero‑sequence current transformers, and other components.