ABB Current Transformer (Measurement Class)

ABB current transformers for measurement and metering applications are precision electromagnetic devices manufactured to IEC 61869-2 (superseding IEC 60044-1), providing accurate current signal reproduction for energy meters, power analyzers, power quality instruments, and protection relays in LV and MV electrical systems. The OCA series covers bar-primary single-turn CTs for LV panels from 50/5 A up to 3000/5 A in compact ring-core formats suitable for DIN rail or busbar mounting, while the OCD wound primary series covers lower current ratios from 5/5 A upward. ABB offers accuracy classes 0.2S, 0.5S, 1, 3, and 5 for measurement, and 5P, 10P, and PX for protection functions, across burdens from 2.5 VA to 30 VA — enabling engineers to select precisely the class and burden combination required for each application without overspecifying.

Class 0.2S is the critical distinction for billing-grade metering in Saudi Arabia. The Saudi Electricity Company (SEC) requires Class 0.2S current transformers at all industrial and commercial supply points where active energy billing is based on measured kWh, and ARAMCO's SAES-P-119 electrical metering standard mandates 0.2S CTs for all fiscal metering points. The 'S' suffix indicates the CT maintains its 0.2% accuracy down to 1% of rated current — five times the dynamic range of a standard 0.2 class CT — ensuring accurate measurement even when the supply is lightly loaded at night or during shutdowns. Split-core CTs (the OCS series) allow retrofit installation around existing busbars or cables without disconnecting the circuit, enabling energy metering upgrades without planned power outages — an increasingly important feature as Saudi Arabian facility managers install power quality monitoring systems across legacy distribution infrastructure.

In Saudi Arabia, ABB measurement CTs are specified across every sector from utility grid connection metering to sub-metering in commercial developments to fiscal custody transfer metering in oil and gas. ARAMCO's SAES-P-119 approved CT list includes ABB OCA and OCD series; SEC's T&D approved vendor list includes ABB CTs for utility revenue metering; MARAFIQ specifies ABB 0.2S CTs for its utility interface metering points at Jubail Industrial City. Vision 2030 smart city projects including NEOM's building energy management infrastructure use ABB Class 0.5S CTs feeding sub-metering systems for tenant billing and sustainability reporting. The OCS split-core series is the preferred CT for energy audit contractors performing IEC 62053-based energy surveys across Saudi Arabia's commercial building stock.

Razz Middle East supplies ABB measurement CTs in all standard ratios from 50/5 A to 3000/5 A, all accuracy classes from 0.2S to 5, and all mounting formats (bar-primary ring, wound primary, split-core) for immediate delivery across Saudi Arabia. We provide CT selection support for energy metering system designs, SEC billing class compliance verification, and full calibration certificates traceable to national metrological standards.