High Voltage Isolation Relays for Use in Isolation Applications

“High-voltage isolation relays protect people and sensitive circuitry”

Introduction

Whether we are talking about protecting personal safety or sensitive circuitry, Standex Detect offers high-voltage relays that deliver high-isolation characteristics. Likewise, these relays operate reliably over a wide temperature range. Moreover, they provide an economical way to carry out billions of switching operations. Our high voltage isolation relays integrate a large amount of smart technology packed into a small footprint. They deliver high-voltage isolation protection in ATE (Automated Test Equipment), Medical Equipment, Alternative Energy, and Electric Vehicles & Battery Management systems, and various other markets.

KT and SHV Series Highlights

For instance, our KT Reed Relay series has an insulation resistance of >= 10E+13Ω, measures just 8mm x 10mm x 30mm, and is available in a through-hole (THT) or surface-mount design (SMD).  Furthermore, this high-voltage reed relay is capable of switching up to 1kVDC, breakdown voltage of 4.2kVDC, and isolation voltage up to 7kVDC.

Additional features include an innovative design with no internal solder joints and the ability to meet minimum creepage distance requirements as outlined by the IEC standard. A typical alternative energy application includes measuring isolation resistance across several components within a solar-powered system prior to connecting to the grid, preventing injury or further current leakage.

High Isolation Applications

• ATE/Test & Measurement – Insulation Testers, DMM & Oscilloscopes, Semiconductor Testers, Multiplexer/Matrix Switches, Transient Voltage Suppressors (TVS)
• Alternative Energy – Solar Inverters, Power Distribution
• Medical Equipment – Surgical Generators, Automated External Defibrillators, Isolation Monitoring, Ultrasound Probe Testers
• Electric Vehicles & Battery Management – Battery Isolation Systems, Power Inverters, Battery Conditioning

The SHV reed relay series is a single in-line high-voltage relay, or instrumentation-grade reed relay, supplied in a moulded housing, capable of switching up to 1kVDC and able to dielectrically hold off up to 4kVDC across the contacts as well as between contacts and coil. This high-voltage reed relay series features an insulation resistance of >5 x 10^12 Ω and uses a minimal PCB area, at only 50% compared to our DIP and DIL reed relay series. It is even smaller than the former potted SIL-HV Reed Relay.

The SHV reed relay series was designed primarily for use in automatic test systems, testing high-power MOSFETs. These rugged semiconductors have a very high initial peak current capability. Having a reed relay that can carry high-current pulses for hundreds of millions of operations is a critical requirement. The SHV relay series can carry up to 5 amps for up to 50milli-second at a consistent repetition rate. The relays have standard internal magnetic shields for close-stacking matrices.

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