Control Instrumentation Supplier to the South African Electrical Industry
Current Transformers
The MN1 is a type of moulded case ring current transformer (CT) used to measure AC currents, typically ranging from 50A to 400A, and stepping them down to a 1A or 5A secondary output. These are frequently used in industrial applications for metering and monitoring, commonly featuring a 32mm internal diameter (ID) ring for cable passage.
The MN2 is a moulded case ring current transformer (CT) used for measuring high alternating currents by reducing them to a manageable \(5\text{A}\) or \(1\text{A}\) secondary output for meters and relays. It is designed for low-voltage applications, featuring a \(40\text{mm}\) inner diameter to fit busbars up to \(40 \times 12.5\text{mm}\) or cables.
The BNP series Transformers refers to a range of Primary Wound Current Transformers (CTs) designed to measure alternating currents. They are commonly used for low-voltage metering applications, such as panel builders, switchgear, and distribution boards.
The BR1 is a moulded case ring-type current transformer (CT) used to scale down high electrical currents (up to 2000A) to a safer 1A or 5A secondary for measurement, often used in panel building and energy monitoring. It typically features a 65mm inner diameter for cable or busbar passing and operates at a 660V system voltage.
The BR2 current transformer is a moulded-case ring type CT typically used in low-voltage power applications for measuring and monitoring purposes.
The BR3 (or IBR3) is a molded case, ring-type current transformer (CT) designed for stepping down high primary currents (400A – 3000A) to a measurable 1A or 5A secondary for industrial, low-voltage (660V) metering or protection. Featuring a 110mm diameter window, it fits large cables and bars, often used in class 0.5 or 0.2 precision applications.
A SUMMATION Current Transformer (CT) is a specialized electrical device used to sum the secondary currents of multiple main CTs into a single output. It enables monitoring of total consumption from multiple feeders (e.g., generators or loads) using one meter, typically with 5A or 1A secondaries and high accuracy (Class 0.5 or 1)
