RCT Industrial Current Sensor
The RCT1A is a genuine Current Transformer (CT) replacement but has all the intrinsic benefits of a thin, light-weight, flexible, clip-around Rogowski (sense) coil. Just like a CT the RCT1A secondary output is an industry standard 0 to 1A (5VA pf 1) instantaneous current proportional to the measured primary current
Typically the RCT1A is used with power, current and power quality meters and is an ideal replacement for CTs in retrofit applications to avoid plant shutdown, applications with limited space for installation and particularly where existing monitoring equipment designed for a 0 to 1A CT input is installed.
The RCT1A is a genuine current transformer (CT) replacement but has all the intrinsic benefits of a thin, light-weight, flexible, clip-around Rogowski (sense) coil. Just like a CT the RCT1A secondary output is an industry standard 0 to 1A (5VA p.f. 1) instantaneous current proportional to the measured primary current.
Typically the RCT1A is used with power, current and power quality meters and is an ideal replacement for CTs in retrofit applications to avoid plant shutdown, applications with limited space for installation and particularly where existing monitoring equipment designed for a 0 to 1A CT input is installed.
Rated current (rms) | 500Arms to 50kArms |
---|---|
Rated output (Full scale FS) | 1A rms |
Output limit | 120% FS (1.2A rms) |
Supply voltage (wide input) | 24Vdc (+/-20%) |
Maximum input power | For 5 ohm burden, 100% Rated current, 13W For 1.25 ohm burden, 100% Rated current, 3.5W |
Operating temperature range | –5℃ to +40℃ (Integrator electronics) –20℃ to +80℃ (Coil and cable) |
Bandwidth (-3dB) | 0.6Hz to 5kHz |
Phase shift @50Hz | < 0.5 degrees |
Accuracy (typ.) | ±1.0% of reading (20% to 120% FS, 25℃) |
Output load | 5 ohm to 1.25 ohm |
Coil Length | 300mm, 500mm or 700mm (Custom lengths available) |
Cable Length (coil to integrator) | 1m or 2.5m (Custom lengths available) |
Isolated BNC-BNC cable split option between coil and electronics to enable ease of installation e.g. threading through existing conduit. Standard cable permanently fixed.
Until recently, flexible coil current sensors (Rogowski coils) have provided voltage or mA outputs proportional to the measured current; perfect for data acquisition systems but not compatible with traditionally installed 1A/5A metering systems. This compatibility issue is eliminated with the new RCT1A current sensor from PEM Ltd. The RCT1A is a flexible, clip-around, light-weight current sensor with a 0-1A output. It allows safe and simple installation and is compatible with energy meters that are typically fed from current transformers (CTs).
Installation of "retrospective" power and energy monitoring systems can be costly if the installation requires plant shutdown. Installation conditions are often less than perfect, and lack of space can mean bus-bars must be repositioned to accommodate large iron core CTs making shutdown unavoidable. This poses a particular problem when the nature of the business cannot accommodate electrical shutdown e.g. hospitals.