AIERWAY QH-ER.JYT40.5-A2 (55mm)

Product introduction

The AIERWAY QH-ER.JYT40.5-A2 (55mm) is an advanced indoor metal-enclosed vacuum circuit breaker (VCB) switchgear designed for 40.5kV medium-voltage power distribution, featuring an optimized 55mm center distance between phases. This increased phase spacing, compared to the 42mm version, provides enhanced dielectric performance, improved thermal management, and greater flexibility for high-current applications, making it ideal for demanding industrial and utility installations where reliability and safety are critical.

Core Design & Technology

1. Enhanced Phase Spacing (55mm Center Distance)
– The 55mm phase-to-phase busbar spacing offers improved dielectric clearance and creepage distance for 40.5kV operation, ensuring superior insulation performance and reduced risk of phase-to-phase faults.
– This design provides better thermal dissipation for high-current applications (up to 2500A or 3150A), allowing for more efficient heat management and extended component life.

2. High-Voltage Vacuum Interruption
– Utilizes specially engineered 40.5kV-rated vacuum interrupters with advanced contact materials and magnetic field control for reliable interruption of high fault currents (typically 25kA or 31.5kA).
3. Robust Metal-Clad Construction (per IEC 62271-200)
– Main busbar compartment (with 55mm optimized spacing)

Main Technical Parameters