printer friendly version

Phase comparators for testing in-phase conditions

Dehn's Type PHV two-pole phase comparators from Surge Technology's HV division, offer safe and reliable operation while testing for in-phase conditions in three-phase electrical systems with rated voltages up to 36 kV/50 Hz.

Meeting the requirements of international IEC standards, the phase comparators are suitable for use in indoor and outdoor systems, but not in wet conditions. Distinctive red rings on both test prods mark the end of the insulating sections in the direction of the operating head/indicator. This provides the user with a visible limit of contact with live and earthed system parts, as well as the depth of penetration allowed into electrical systems.

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.

The phase comparator type PHV is used in contact with the parts to be tested and is insensitive to magnetic and electrical interference. False indications are completely eliminated.

Various colour coded test prods are available and may be selected for the desired voltage, their simple bayonet connection ensures easy coupling to the basic test unit. The compact range of test prods is ideal for use in areas where space is limited, while standard test prods are suited for areas where larger span and separation is required.

Dehn is represented locally by Surge Technology.

Share this article:

Further reading: