ROCKWILL VD4(S)/P‑12 complies with IEC 62271‑100 for AC circuit‑breakers. It adopts solid‑insulation encapsulated pole, modular spring mechanism, up to 30000 overhaul‑free mechanical operations, complete spare‑parts portfolio and supports customized manufacture.

ROCKWILL VD4/P‑12 complies with IEC 62271‑100 for AC high‑voltage circuit‑breakers. It features solid‑insulation encapsulated pole, modular spring actuator, up to 30000 overhaul‑free mechanical operations, complete spare‑parts supply and customizable solutions.

ROCKWILL VD4 series complies with IEC 62271‑100 for AC high‑voltage circuit‑breakers. It adopts solid‑insulated encapsulated pole, self‑developed spring mechanism; VD4(S) version supports intelligent online monitoring, available in handcart & fixed types, with long mechanical life and complete interlocks.

ROCKWILL current transformers comply with IEC 60044‑1:2003 (superseded by the current edition IEC 61869‑2) and GB 1208‑2006. The product portfolio includes indoor split‑core type and outdoor post‑type with epoxy‑resin casting construction. Multi‑secondary‑winding and multi‑accuracy‑class combinations such as 0.2S/0.5/10P are supported. Designed for 50/60 Hz systems, they are suitable for ring main units, C‑GIS and outdoor substations.

ROCKWILL voltage transformers comply with IEC 60044‑2:2003 (superseded by current IEC 61869‑3) and GB 1207‑2006. Portfolio includes indoor & outdoor epoxy‑cast single‑phase types, with optional residual‑voltage windings, multi‑accuracy‑grade combinations(0.2/0.5/6P), for 50/60 Hz, suitable for RMU, C‑GIS and outdoor substations.