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Flex CT (Flexible Current Transformer)
flex ct 3 24 inflex-ct-2-12 inflex-ct-connector-closedflex-ct-install

Flex CT (Flexible Current Transformer)

$1,010.00 – $2,655.00Price range: $1,010.00 through $2,655.00

Please call +1 (800)296-4120 for International Pricing

The PMI Flex CT is a flexible current transformer designed for accurate measurement of high-current applications where traditional clamp-style probes are impractical. Utilizing a flexible Rogowski coil, it provides a lightweight and adaptable solution for measuring currents up to 5000A across a wide range of electrical systems.

This Flex CT is compatible with the Revolution and the Seeker only. For Flex CTs compatible with other products, please see those products’ respective pages.

Its flexible sensor allows easy installation around large conductors, bus bars, and irregular geometries, making it ideal for industrial, utility, and power quality monitoring environments. With selectable ranges and a wide frequency response from 8 Hz to 10 kHz, the Flex CT supports accurate measurement of both fundamental current and harmonic content.

Powered directly by PMI recorders, the Flex CT eliminates the need for external power sources, simplifying deployment and improving reliability. Its high linearity and low phase shift characteristics ensure dependable measurement performance across varying load conditions.

Designed for demanding environments, the Flex CT combines flexibility, accuracy, and ease of use to enable efficient current measurement in applications where rigid probes cannot be used.


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Have a PQ Question? Ask Merlin™ — Free

Send it to askmerlin@powermonitors.com or text (540) 383-3144

  • Features & Benefits
  • Specs
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  • FAQ

Features & Benefits

The Flex CT is engineered to provide accurate current measurement in applications where traditional clamp-style current probes are limited by size or accessibility. Its flexible Rogowski coil design allows it to wrap easily around large conductors, bus bars, and irregular shapes, enabling installation in locations that would otherwise be inaccessible. This flexibility makes it particularly valuable in industrial and utility environments where space constraints and conductor size present challenges.

With switchable measurement ranges up to 5000A, the Flex CT offers broad application coverage while maintaining measurement accuracy. Its wide frequency response from 8 Hz to 10 kHz supports detailed analysis of both fundamental current and higher-order harmonics, enabling effective power quality diagnostics and waveform analysis. High linearity and low phase shift contribute to reliable data collection, ensuring accurate representation of system performance.

The device is powered directly through connection to PMI recorders, eliminating the need for batteries or external power sources and simplifying field deployment. Its lightweight and flexible construction reduces installation time and improves usability in complex electrical environments.

Built for safety and durability, the Flex CT features double insulation and high voltage ratings suitable for demanding applications. Its environmental protection and robust materials support operation in a wide range of conditions, providing dependable performance for long-term monitoring and analysis.

Specs

Electrical Specifications
Switchable Ranges 1 to 100A, 1 to 1000A, 1 to 5000A
Operating Limit 1 to 5000A
Controls Range is chosen from the recorder, PC, or PDA software.
Power Source Power is supplied by connection to PMI recorder. No external battery or other power source is required.
Linearity ±0.05%
Phase Shift ≤±0.5% at 50 to 60 Hz
Frequency Range 8Hz to 10kHz
Crest Factor (mid range) 100A and 1000A scale: 3.0 5000A scale: 1.6
Position Sensitivity ±1.5% 1 in from connector
Working Voltage
Sensor 600V AC to earth
Module 600V AC to earth
Accuracy
Accuracy ± 1% of full scale
Safety
Construction Double Insulated
Sensor 600V CAT IV
Module 600V CAT III
Pollution Degree 2
PMI Recorder Capability
Compatibility Compatible with the Revolution and the Seeker
Mechanical Materials
Sensor Jacket Polyurethane UL94V0
Connector FR Polypropylene UL94V0
Cable Jacket Polyurethane UL94V0
Physical Dimensions
Min. Bending Radius 1 in (25.4 mm)
Sensor Diameter .310 in (7.9 mm)
Connector Diameter 1.07 in max (27.2 mm)
Sensor Output Cable Length 48 in (1.2 m)
Environmental
Operating Temperature -20°F to 135°F, -29°C to 57°C
Altitude Operating 0 to 2000m, derated above 2000m
Case Protection Sensor and Module IP65 per IEC 529

PMI CT MODEL NUMBER …/12 …/24 …/36 …/48
LENGTH (OPEN) 12 in.
305 mm
24 in.
610 mm
36 in.
915 mm
48 in.
1220 mm
O.D. (CLOSED) 4.15 in.
105 mm
8.3 in.
210 mm
12 in.
305 mm
15.9 in.
404 mm
I.D. (CLOSED) 3.5 in.
89 mm
7 in.
178 mm
10.9 in.
277 mm
14.7 in.
372 mm

Downloads

Specification Sheet

  • Ultra Slim Flex CT Spec Sheet

White Papers

Flex CT Overview

Auto-Correction of CT Hookup

 

Click Here for Product-Related White Papers

FAQ

Which recorders is the Flex CT compatible with? +

It’s compatible with the Revolution and the Seeker

What current ranges does the Flex CT support? +

It offers switchable ranges of 1 to 100A, 1 to 1000A, and 1 to 5000A, all from one CT set.

Does the Flex CT require a battery? +

No. It’s powered directly by connection to the PMI recorder, so no external battery or power source is required.

What lengths are available? +

The Flex CT comes in 12″, 24″, 36″, and 48″ lengths, and is available in sets of two, three, or four for different recorders.

What safety rating does the Flex CT carry? +

The sensor is rated 600V CAT IV and the module 600V CAT III, with double insulation for safe use in demanding environments.

Have a power quality question about your recorder? +

Email Merlin™ at askmerlin@powermonitors.com or text (540) 383-3144. Merlin™ is PMI’s AI assistant, trained on 425+ technical white papers.

Have a PQ question? Ask Merlin™ — free. Send it to askmerlin@powermonitors.com or text (540) 383-3144.

Power Monitors, Inc. — Tools you Need. People you Trust.

Power Monitors, Inc. is an industry-leading product design and manufacturing firm based in Mt. Crawford, Virginia. PMI® strives to solve power quality problems by listening to our customers and working with them to design and manufacture products. Total customer satisfaction is the primary goal of all PMI® staff.

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