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PCB Mounted Current Transducers for Enhanced Earth Leakage Monitoring

PPM Power’s range of LEM PCB-mounted current transducers has expanded to now include the CDSR 0.07-NPDT model.

The new model is a three phase unit offering discrete signal outputs, enabling a fast, simple and safe method of detecting and triggering the trip conditions if leakage current exceeds safe levels.

Supporting a maximum current of 32 A per phase, the CDSR is suitable for integration into AC chargers ranging from 3.7 kW to 22 kW. The series has been designed as a leakage current sensor to address the growing market need for residential and commercial charging stations.  It includes options for both single-phase and three-phase architectures, capable of measuring both DC and AC currents.

The surge in electric vehicle adoption along with the introduction of new IEC Standards  has driven an increased requirement for current transducers. IEC 62955 / IEC 62752, requires the detection of a direct leakage current at 6 mA DC to avoid the home Residual Current Device (RCD) Type A being ineffective.

Highly durable, the CDSR is compatible with all EV chargers. It functions effectively within a temperature range of -40°C to 85°C and can endure acceleration forces of up to 10 G without compromising performance.

The unit boasts excellent insulation between its primary and measurement circuits. This is achieved through generous creepage and clearance distances of 13.2 mm.

Visit the PCB-mounted Current Transducers product page or contact a member of our technical sales team for more information.

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Accelerated Innovation: SiC Modules Now Available within 20-Weeks!

PPM Power SiC Modules
In today’s fast-paced technological environment, time is of the essence and PPM Power’s commitment to supply Silicon Carbide (SiC) modules aligns with the ever growing need for high performance components in power electronics.

1.2 kV SiC modules capable of supporting current ranges from 100 to 980 A address a range of applications and power levels. Availability on most is 20 weeks, with popular modules available in as little as 6 weeks!

The 20 week lead time covers three product lines; SiC Automotive Modules, SiC MOSFET’s and SiC Power Modules.

All benefit from high voltage breakdown, high current density, high operating temperatures, high switching frequencies and low switching loss. This makes them a preferred choice for applications such as electric vehicles (EV), aerospace and high efficiency renewable converters.

Voltage (V)Current (A)Topology
Hitachi Energy SiC Automotive Modules1200580 - 980Half-bridgeHitachi Energy RoadPak SiC Module
Hitachi Energy SiC MOSFETs1700 - 3300500 - 1800Half-bridgeLinPak SiC MOSFET phase-leg module
SanRex SiC Power Modules1200 - 1700100- 150Half-bridgeSanRex SiC MOSFET module

SiC Automotive Modules – RoadPak takes advantage of SiC technology for e-mobility and automotive applications.

SiC MOSFET Modules – SiC LinPak devices deliver a massive reduction of switching losses, an increase in current density and higher maximum junction temperature.

SiC Power Modules – (SiC) MOSFET modules integrate a Schottky free-wheeling diode in a single device, delivering a low profile and compact package.

PPM Power also supports high performance DC link capacitor solutions to help deliver maximum systems efficiency with loop inductances below 10 nH.

For more information and technical advice on selecting the correct module for your application, contact the PPM Power team.

 

 

 

 

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How to Convert Low Voltage DC to High Voltage DC

UltraVolt A series power supply
If you need a high voltage source in your system or product, it can be provided using a simple to use DC/DC converter. The UltraVolt high voltage DC to DC power supply range includes over 1,500 standard high voltage options. Therefore, to help speed your selection PPM has created these 7 key questions to enable us to find what you need.

UltraVolt A series power supply

  1. What input and output voltages?
    • Input: UltraVolt modules operate on DC input voltage (+5, +12 or+ 24 VDC)
    • Output: UltraVolt modules can produce High Voltages up to 60 kV
  2. How much output ripple can you tolerate?
  3. How much high voltage power do you need?
    • Maximum output power per DC/DC converter is 250 W (it is possible to parallel for higher power)
  4. How many different high voltage outputs are needed?
    • UltraVolt products are mostly single output (with a few exceptions)
  5. What type of mounting method is preferred? Chassis or PCB?
  6. Polarity: Negative, positive or positive & negative output voltages?
    • Positive unipolar output => 0 to +10 kV DC, negative unipolar output => 0 to 10 kV DC
    • Bipolar output => -10 kV to +10 kV DC
  7. How do you want to control it?
    • UltraVolt products only have analogue interfaces (with different capabilities)

By determining the answers to the above questions, PPM Power can find the ideal solution for your application; quickly and precisely matching system specifications for use in high voltage applications.

UltraVolt HVA series amplifier

To find out more about high voltage DC/DC power supplies, or to discuss your requirements with our technical sales team, contact PPM Power today.

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Powering Progress: The Expanded Range of Programmable Power Supplies

GENESYS 3U GSP slider
PPM Power has extended its range of TDK-Lambda’s GENESYS+ programmable power supplies, offering a controlled and stable source of power for various applications, with a wide variety of integrated functions, features and incremental choices in output voltage and current.

The expansion covers a variety of product lines; GSP, GSPL, GSPS and PSINK.

GENESYS+ Scalable Power (GSP) Units

The new GSP50-200 (2U) and GSP50-300 (3U) scalable power models have an output voltage of 50 V but have an output current of 200 A and 300 A respectively. These programmable DC power supplies use Digital Signal Processing (DSP) technology to enhance performance, functionality and efficiency by up to 93 %!

They can be applied to diverse fields such as component testing, aerospace and automotive testing, semiconductor fabrication, water treatment, plating and solar array simulation.

TDK-Lambda GENESYS+ 3U GSP

GENESYS+ Scalable Power Low Profile (GSPL)

The all new low profile, high power, low density GSPL models deliver 15 kW in a compact 2U design and 22.5 kW in a 3U configuration, supporting output voltages and currents ranging from 0-20 V/1,125 A to 0-1,500 V/15 A. They operate seamlessly in constant voltage, current and power modes.

Standard features include precise control over voltage and current slew rates, the ability for arbitrary waveform generation and storage, internal resistance simulation and display brightness control.

GENESYS+™ High Power Rack System (GSPS)

The expanded GSPS High Power Systems product line provides a fully configured and ready-to-use solution in a 19-inch, 20U high rack cabinet, delivering up to 60 kW. The output voltage and current ratings span from 0-10 V/4,500 A to 0-600 V/102 A.

Genesys high power rack cabinet GSPS

Genesys™ Power Sink

New Power Sink (PSINK) options have been added to the existing 1.7 kW and 3.4 kW high power density programmable power supplies. Capable of absorbing and dissipating peak power of up to 300 W and sustaining a continuous load of 100 W, the PSINK boasts the ability to deliver programming speeds that are 25 times faster! The fall times are as brief as 12.5 Ms, even when operating under no load conditions.

The PSINK option in GENESYS+™ proves to be an optimal choice for testing electric motors equipped with PWM (pulse width modulated) speed control that feeds power back to the source during motor braking scenarios. This is particularly applicable to components like automotive electric windows, power mirrors and power seats. It’s also useful in battery and capacitor testing by efficiently discharging post-tests. Its rapid downtime facilitates shorter test cycles, providing a more accurate simulation of normal operation.

TDK-Lambda Genesys new 1U 5kW PPS

To discuss your requirements further or to place an order, contact our technical sales team who can help you pick the right model for you.

 

 

 

 

 

 

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New EPOWERSYS Highest Precision Transducers

EPOWERSYS EZF 200

As the world transitions towards more sustainable energy solutions, the power sector faces the challenge of accommodating renewable sources and optimising energy distribution. The demand for high-precision current transducers has increased in response to the need for precise monitoring and control.

PPM Power now supplies the new EZF Series high-precision current transducers from EPOWERSYS. This product range covers a broad current spectrum, spanning 200 to 1000 amps. This range utilises high bandwidth, extremely low temperature drift and very low noise, making them adaptable to a variety of power systems and applications such as biomedical devices, Nuclear Magnetic Resonances (NMR), calibration systems as well as test and measurement setups.

EPOWERSYS EZF 200

The integration of zero-flux technology has resulted in superior accuracy, sensitivity and miniaturisation, providing engineers and technicians with enhanced measurement capabilities critical for the evolving landscape of power systems.

This range of high performance current transducer allows the electronic measurement of DC, AC and pulsed currents with galvanic isolation between the primary (high power) circuit and the secondary (electronic) circuit with <±2ppm linearity and stability.

The design allows for a more compact form factor, facilitating easier integration into existing systems and offering flexibility in installation.

Visit the Highest Precision DC Current Transducers product page for more information or contact our technical sales team, who will help with any queries or order placement.

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Protecting Electrical Apparatus with Corona Detection

UVolle handheld corona detection camera
Corona and partial discharge on power distribution lines needs to be quickly detected and pin-pointed, so maintenance teams can perform timely preventative maintenance and avoid costly unplanned blackouts.

What is partial discharge and corona?

Corona discharges, detected using UV cameras, can indicate potential equipment failure due to various factors such as insulation damage, inadequate clearances, or faulty installations.

Corona detection

Why is it important?

Identifying these issues early can:

  • Prevent unexpected power outages
  • Ensure safety
  • Increase service reliability
  • Boost customer satisfaction

The Benefits of Using Ofil’s DayCor® Camera

Ofil’s partial discharge inspection cameras are designed for daytime investigation of electrical apparatus indoors and outdoors. Their DayCor® technology features very high sensitivity to corona signals and perfect signal positioning to pinpoint the discharge exactly. Alternative technologies can only indicate the presence of corona and partial discharge with a limited resolution, meaning the exact location is unknown.

UVolle handheld corona detection camera

The handheld cameras are ideal for remote testing of high voltage apparatus; they are light-weight, provide details on humidity and temperature, include a screen, and the ability to save to an SD card.

The gimbal and fixed mounted cameras, alternatively, can be mounted on electric trains to monitor rail infrastructure, or on drones and aerial systems allowing for remote monitoring of difficult to access areas. These corona cameras are ideal for systems integration.

Regular inspections using these UV cameras can identify faults before they escalate to system failures. This preventative approach:

  • Allows you to move from corrective to predictive maintenance
  • Increases worker safety through remote, non-contact inspections
  • Extends the lifespan of your equipment
  • Saves costs associated with major repairs or replacements
  • Enables inspections in hard-to-reach areas.

These inspections can also be carried out without interrupting the power supply, keeping customer inconvenience to a minimum.

Find out more about corona detection here or speak to the technical team at PPM Power about your requirements by contacting us.

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Automotive Testing over 600 V with Genesys+ PSUs

Genesys plus 5kW HV power supply
The Genesys+ 1U high programmable DC power supply series now includes two new models of power supplies over 5 kW and 1000 V supporting the test and development of electric vehicles with 800 V battery systems.

Genesys plus 5kW HV power supplyGenesys+ power supplies, now available up to 1500 V

‌These high-power density models are ideal for automotive testing, which includes electric and hybrid cars with high voltage batteries, general test or research, measurement, semiconductor fabrication, battery manufacturing, and renewable energy.

The two new voltage models offer 0-1000 V/0-5 A and 0-1500 V/0-3.4 A programable outputs. They can be specified to accept three-phase 170 to 265 Vac or wide range 342 to 528 Vac inputs with active Power Factor Correction (PFC). The units can operate in constant current, constant voltage, or constant power limit modes, and in addition, offer internal resistance simulation.

The series benefits from Digital Signal Processing (DSP) technology and the latest generation components, including ferrite materials, to obtain efficiencies of up to 92%. Less internal waste heat ensures a higher power rating without compromising reliability.

This expansion provides engineers with incremental and seamless choices in output voltage and current ranging from 0-10 V/500 A to 0-1500 V/3.4 A. For more information and technical advice on selecting the correct model for your application, contact the PPM Power team.

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Five Criteria to consider when selecting a DC Contactor

selecting a dc contactor
As the mechanical opening of a DC circuit under load leads inevitably to arcing, which must be handled and quenched, component selection is vital for the safety and reliability of systems. The following criteria will help you with selecting the right DC contactor.

selecting a dc contactor

1. The definition of the actual application requirements

It is important to know the rated insulation voltage and rated operating current needed for your application. While in most cases it is straightforward to define the voltage, the first problems arise partially in specifying the current. The rated operating current, or, as it is also known, the thermal continuous current, refers to the average current flowing during normal operation.

Dependent on the contact resistance of the main contacts in the contactor (governed by the contact material and the contact force), the rated operating current causes heating of the contactor. The rated operating current of DC contactors is specified by the manufacturers under clearly defined ambient conditions. Therefore, in actual operating conditions, the actual permissible value can deviate. If, for example, the DC contactor is installed in a ventilated control cabinet, overshoots of around 25% are not infrequent. It is important that these are individually agreed with the manufacturer when specifying.

The breaking capacity too may partially lie above, but also significantly below the design parameters. Dependent on the application, there are operating points at which short-term current peaks occur. However, for thermal consideration, these can be neglected. Nevertheless, the DC contactor should also be able to reliably break the circuit in the event of faults at these operating points.

2. The inductance in the circuit

In addition to the current and voltage values, the inductance in the circuit is also a decisive factor that can significantly influence the breaking capacity. Due to the inductive properties, a voltage peak is generated, dependent on the magnitude of the inductance, which increases the intensity of the arc. As an example, if the time constant of the circuit can be reduced (by reducing the inductance), from 15 ms to 1 ms, the breaking capacity of the Schaltbau C294 DC contactor increases by 300%.

3. Bidirectional applications

Contactors that aren`t intended for bidirectional applications can only disconnect currents in one current direction. Bi-directional contactors control both current directions reliably and are therefore ideal for all applications with energy recovery. A typical example of this would be energy storage systems, where batteries are charged and then discharged again. Other applications for these contactors include regenerative systems, battery-powered vehicles and DC charging stations.

4. Consideration of the short circuit

As with all applications, monitoring for short circuits must be undertaken. If the DC contactor is appropriately matched to the main fuse, damage to the contactor in the event of a short circuit, should be prevented. For the implementation of safety functions, it must also be determined whether the switch state of the contactor needs to be monitored. If so, the contactor needs a feedback circuit.

5. Mechanical and electrical service life

The service life requirement for a DC contactor is defined by the application. Here, a differentiation is made between mechanical (no-load switching cycles) and electrical (switching cycles under a defined load) service life.

In many of the latest applications, such as battery storage or also in the automotive sector, the contactor generally switches under no-load. The power electronics regulate the power before the contactor instigates the galvanic isolation. In this case, the requirement relates to the mechanical service life, which is much higher.

Under-load disconnections are exclusively emergency disconnections, which in general only occur a few times throughout the entire service life of the system. However, there are also a few applications in which the switchgear carries out a hot switching role, such as in industrial or railway applications, where there are cases in which the contactor must disconnect the rated operating current several 100,000 times.

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Advancing Micro Grid Hardware Testing with BriPower’s ESA-62116

ESA Single cabinet power supply
Grid power loss can be difficult to interpret due to normal fluctuations that occur in the grid from time to time combined with actual power failures.

Anti-islanding tests are crucial in ensuring the safety and stability of power systems. These tests are conducted to verify if distributed energy resources (DERs) can properly detect and disconnect from the grid during a power outage or grid fault, thereby optimising the performance of power systems.

The BriPower ESA series is a high-performance, multi-functional grid simulator using advanced power width modulation (PWM) technology with multiple output power levels from 45 kVA to 240 kVA for a single system. Up to four individual systems can be paralleled to achieve power levels up to 960 kVA and above.

This series uses up to 50th harmonic waveform generation, a regenerative AC load function and line impedance (RL) simulation. It provides standard software that can simulate various power grid operating conditions and supports multiple power settings.

ESA (Single cabinet)

Adopting optical fibre communication, the system performs multiple monitoring and protection of all main components, communication connections and systems.

BriPower has introduced the ESA-62116 option, which, when combined with the ESA series acts as a power supply and electronic RLC load, allowing for various accurate simulated anti-islanding scenarios, ensuring that DERs can promptly detect anomalies and disconnect from the grid to prevent islanding.

 

When working in anti-islanding test mode, PAC, QAC, PEUT and QL parameters can be set directly, and the equivalent R, L, and C values will also be displayed.

The 62116 option is suitable for testing multiple types of DERs, including solar PV, wind turbines and energy storage systems, and meets the requirements of IEC62116-2008.

Contact PPM Power’s technical sales team, who are on hand to help with your requirements.

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PPM Power Unlocks New Switch Technologies for Electrification

LCV event

Low carbon vehicle engineers will be heading to Cenex-LCV, where they will be able to access and easily implement new switch technologies from PPM Power, this September.

The focal point for the Low Carbon Vehicle (LCV) industry each year, Cenex-LCV, is taking place in September at UTAC Millbrook. The show attracts engineers, industry professionals and technical directors alike, to explore the latest advancements in sustainable propulsion, vehicle design and electric vehicle systems. This year’s event promises to be even more significant; attracting thousands of professionals eager to learn and network.

With products for hypercars to commercial vehicles through to aviation, PPM Power’s stand (#C3-419) will display cutting-edge solutions that help users achieve their project performance and cost targets; through optimisation, customisation and availability.

Featured will be PPM’s ‘Roadstar’ Test Kit for rapid and high performance prototype evaluation of inverters, incorporating state-of-the-art SiC MOSFET technology integrated with highly optimised DC link capacitors. The kit, an example of a recent solution developed by PPM, was designed to enable engineers to exploit the latest SiC technology without causing delays or budget increases. It was rapidly designed using best-in-class DC link capacitors, SiC power modules and engineered cold plates, and was developed to function straight away and exactly as required.

PPM’s Test Kit development; Roadstar

With electrical infrastructure becoming ever more important, PPM Power will also be featuring new switch technology in the form of Schaltbau contactors. These solid-state contactors offer ultra-fast reaction times when limiting fault currents, thereby providing DC and AC fault protection. The speed of response reduces the magnitude of fault current, making down-stream design easier. The devices are also capable of switching, under load, millions of times and offer long lifetimes.

LCV will serve as a platform for industry professionals to engage with PPM on stand C3-419 and discuss the myriad of component options and solutions available from the company.

“We are excited to be a part of LCV 2023; an event that embodies the electrification of transport and the pursuit of net-zero emissions. At PPM Power, we are committed to accelerating time to market for low carbon vehicles by offering fast, precise and efficient solutions,” said Phil Surman, Director of Sales at PPM Power.

For professionals in the low carbon vehicle/electric vehicle and connected automated mobility/vehicle sectors, Cenex-LCV 2023 is a must-attend event. Tickets are free online at www.cenex-lcv.co.uk.

PPM Power at LCV 2022

 

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