Safe and reliable phase comparators

January 2011 Electrical Power & Protection

Dehn’s PHV phase comparators, available from Surgetek, are two-pole devices that offer safe and reliable operation while testing for in-phase conditions in three-phase electrical systems. They are suitable for voltages up to 36 kV/50 Hz, have SABS approval and meet the requirements of IEC 6148 standards.

The PHV phase comparator has distinctive red rings on both test prods that mark the end of the insulating sections in the direction of the operating head/indicator. It represents a visible limit of contact with live and earthed system parts, as well as the depth of penetration allowed into electrical systems. The type PHV is suitable for use in indoor and outdoor systems, but not in wet conditions.

The eccentric mounting of the indication ensures good visibility from various angles, and provides for an out-of-phase condition when the phase angle between the two parts of the system to be tested is between 60° and 300°. A clear and sharp threshold is provided and the indication remains at a constant frequency over the testing range. Used in contact with the parts to be tested, the PHV phase comparator is insensitive to magnetic and electrical interference.

Various colour coded test prods are available for select voltages with a simple bayonet connection that ensures easy coupling to the test unit. Compact prods are ideal for use in areas where space is limited, while the standard versions are suited for areas where larger span and separation is required. Test prods with a 90° angle are available for testing in switchgear where the axis of the bushing is mounted in a vertical plane.

For more information contact John van Staaden, Surgetek, +27 (0)11 792 1303, [email protected], www.surgetek.co.za

Further reading:

Highly efficient current-regulated buck converter
Vepac Electronics Electrical Power & Protection
AMI’s Model 789 OEM CW and pulsed laser diode driver is a highly efficient current-regulated buck converter that will provide a programmable current to a floating laser emitter diode load.

Read more...

---

Schneider Electric accelerates adoption of SF₆-free switchgear
Schneider Electric South Africa Electrical Power & Protection
Schneider Electric is driving the transition to sustainable medium-voltage solutions across East Africa with its award-winning SM AirSeT pure-air switchgear.

Read more...

---

Critical power distribution for modern infrastructure
Electrical Power & Protection
Legrand has expanded its critical power portfolio with integrated solutions designed for reliable, efficient, safe and flexible power distribution in many applications, including data centres and industrial sites.

Read more...

---

How to use a voltage tester
Comtest Electrical Power & Protection
Voltage testers are valuable tools for professionals who work with electrical systems.This application note will guide you on how to use a voltage tester effectively, and which Fluke voltage testers can assist in a variety of settings.

Read more...

---

Film capacitors for noise suppression
Electrical Power & Protection
Würth Elektronik has expanded its portfolio of components for the mains input. The new series of WCAP-FTY2 film capacitors is optimised for use in noise suppression and complies with X1 or Y2 safety classes in accordance with IEC 60384-14.

Read more...

---

Emissions pressures are not just hot air
Electrical Power & Protection
Dennis Williams, commercial director of AES says that the South African government aims to push towards global standards in emissions, but it might be difficult for our industries to carry the financial burden. This is where AES fits in.

Read more...

---

ABB achieves zero operational emissions
ABB South Africa Electrical Power & Protection
ABB’s factory in Oiartzun, Spain, has reached a major sustainability milestone.

Read more...

---

Supporting the AI boom with power architecture
Electrical Power & Protection
Hitachi Energy is supporting the 800 VDC power architecture announced by Nvidia, by developing a cleaner, more efficient way to power the next generation of AI infrastructure.

Read more...

---

Terminal blocks with Push-X technology for wiring from 0,34 mm²
Phoenix Contact Electrical Power & Protection
The Push-X product range is growing. With the new XT 1,5 terminal blocks, Phoenix Contact is extending the series to include versions for conductor cross-sections from ^{0,34 to 2,5 mm2}.

Read more...

---

Energy cannot be destroyed, it can only be transferred
Schneider Electric South Africa Electrical Power & Protection
Industry produces significant amounts of waste. Unfortunately, a lot of this waste is simply disposed of, usually impacting the environment. What if these byproducts could be transformed into a source of energy?

Read more...

---