placeholder · manufacturer · indiamart.comCurrent Sensing CTs (Customised)
Customised current-sensing CTs are application-engineered current transformers designed to a buyer's specific sensing requirement rather than to a standard catalogue ratio.
Overview
Customised current-sensing CTs are application-engineered current transformers designed to a buyer's specific sensing requirement rather than to a standard catalogue ratio. They sense AC (and, for specialised cores, AC-superimposed) current in power-electronics and OEM equipment and deliver a defined, low-level secondary signal — a milliamp current, a low AC voltage, or (with an integrated burden resistor / rectifier) a scaled DC voltage such as 333 mV or 0–5 V DC — proportional to the primary current. They are typically toroidal/ring (window) or split-core/hinged designs so the busbar or cable passes through the core; split-core types clamp on without disconnecting the conductor, easing retrofit. A buyer chooses ACE's customised route when an off-the-shelf CT does not fit: non-standard ratio or turns, a specific core window/ID to clear a busbar, a particular output signal and burden to match a controller or measurement IC input, defined accuracy and phase response over the operating range, or a footprint/mounting dictated by the host equipment. They are commonly embedded in rectifiers, drives, UPS, inverters and harmonic-filter assemblies — including ACE's own power-electronics products — for current feedback, regulation, protection and metering. Standard parameter set and typical ranges for the class (not ACE-specific figures): primary range from a few amps to several kiloamps; output as mA secondary, low-VA AC voltage, or DC voltage via onboard rectifier; turns ratio set to the required output; typical sensing accuracy on the order of ±0.5% to ±1% over a wide dynamic range; frequency 50/60 Hz or wider for power-electronics use; core/window size, mounting (PCB, panel, busbar-clamp) and isolation specified per application.
Specifications
| Primary current range | few A up to several kA (customised to application) |
|---|---|
| Output / secondary signal | mA secondary, low-level AC voltage, or scaled DC (e.g. 333 mV, 0–5 V DC via integrated burden/rectifier) |
| Turns ratio | set to required output (custom, not limited to 5 A / 1 A standards) |
| Core form | toroidal / ring (window) or split-core / hinged (clamp-on, no conductor disconnect) |
| Core window / inner diameter | sized to clear the host busbar or cable bundle |
| Sensing accuracy | typically ±0.5% to ±1% over rated dynamic range (application-defined) |
| Frequency / bandwidth | 50/60 Hz standard; wider range for power-electronics current feedback |
| Mounting | PCB, panel, or busbar/cable clamp per host equipment |
| Isolation / insulation | galvanic isolation; dielectric rating per LT application |
| Output options | with or without onboard burden resistor / rectifier for direct DC reading |
| Customisation | ratio, output, core size, accuracy, footprint and terminations to buyer spec |
Applications
- Current feedback and regulation in rectifiers, drives, inverters and UPS
- OEM / embedded current sensing inside power-electronics assemblies
- Harmonic filter and power-conditioning current monitoring
- Retrofit clamp-on (split-core) sensing without interrupting service
- Energy / power metering and submetering with custom output
- Protection and overcurrent feedback in custom panels and equipment
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