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Power Electronic Measurements (PEM)

Power Electronic Measurements Ltd (PEM) is a pioneering leader in wide-bandwidth current measurement devices utilizing Rogowski technology. Since 1991, PEM has developed and manufactured state-of-the-art Rogowski transducers, once niche, now essential across diverse industries worldwide. With a global footprint spanning 35 countries, PEM serves leading engineering firms and research institutions with standard and custom solutions. Committed to advancing current measurement technologies, PEM’s innovations include numerous patents, publications, and ongoing R&D initiatives in electrical current, voltage, and power measurement.

Pantronics India, an authorized distributor of Power Electronic Measurements (PEM), offers a range of Rogowski current sensors, including CWT, CWTHF, CWT Mini, and CWT Ultra-mini, featuring advanced technology for precise current measurement.

CWT Range Flexible, clip-around, wideband, AC Current Probes

The CWT series is the versatile Rogowski coil current probe range. Designed to meet all measurement requirements, the series is available in various peak current ratings from 30A to 300kA. These probes have high-performance slim coil cross-sections between 1.2mm and 8.5mm for space-restricted applications. The coil length begins from 55mm for the compact arrangement up to 1000mm or even longer based on specific application. Thus, these probes CWT have unbeatable flexibility with regards to providing accuracy in measurement in several different industries. The Rogowski Coils are good to measure current using both the current meters along with measuring the DC and AC currents accurately in the entire wide electrical system with utmost precision. Rogowski coils have been extensively used for detecting and measuring electric currents, hence becoming an essential tool for engineers and technicians in power quality analysis, energy monitoring, and industrial automation.

RCT Range: Industrial AC Current Sensors for Permanent Monitoring and Control Installations

The RCT range offers a flexible, lightweight, clip-around solution that is a great alternative to traditional current transformers. High-performance AC current sensors built with advanced Rogowski coil technology, slim 8.5mm coil cross-section, and available in multiple lengths: 300mm, 500mm, 700mm, and 1000mm for different installation needs. RCT sensors are ideal for permanent monitoring and control systems in industrial, energy, and automation applications, as they offer accurate and reliable current measurements with high-bandwidth capability. The RCT range is designed to be user-friendly and robust, making it the first choice for efficient and precise current sensing in demanding environments.

LFR Current Probe

The LFR is tailored for power quality applications, featuring minimal phase error at 45/65Hz, wide bandwidth for precise measurement up to the 400th harmonic, excellent linearity with current magnitude, and a versatile 10:1 switch selectable current range.

DCFlex Current Probe

The DCflex is a user-friendly, cost-effective clip-around DC current probe designed for measuring DC currents exceeding 2kA. It provides a single-shot measurement with typical accuracy of ±1%. Featuring a small LCD display for current readout and a BNC socket for connecting to DMMs or oscilloscopes, the DCflex is ideal for applications such as metal smelting, cathodic protection, hydro-generation, large inverter motor drives, plating plants, and verifying performance of existing dc shunts or Hall Effect transducers in industrial settings.

CMC Range

PEM’s flexible clip-around Rogowski probe measures high-frequency common mode currents in VSDs, flowing through motor drives to ground via bearings in AC systems. It identifies and evaluates these currents, crucial for preventing motor failures and downtime.

Key features: Coil lengths: 500mm, 700mm, 1000mm (longer on request). Max cross-section: 8.5mm (14mm with removable silicone sleeve). Cable lengths: 2.5m, 4m (longer on request). Battery options: AA alkaline (25 hours) or NiMH rechargeable (10 hours, rechargeable externally). Enclosure: H=183mm, W=93mm, D=32mm. BNC output socket with 0.5m cable included

Custom Design

Measuring high-frequency, large-magnitude sinusoidal currents, such as those in RF transmitters, high-frequency induction heating, or plasma applications.

PEM manufactures current probes with a wide bandwidth, capable of measuring from below 1Hz to the MHz range. However, certain applications with very large magnitude, high-frequency sinusoidal currents require custom-designed probes.