3 Phase Voltage Indicator / Live Line Indicator

DeadEasy is a 3 phase, switchboard mounted, voltage indicator that incorporates functional safety design.  It is used to verify that an electrical isolation switch is open, as part of a lockout procedure.

DeadEasy three phase indicator tests an electrical circuit by sensing the existence or absence of an electric field surrounding the electrical phase conductors.  In essence, DeadEasy is a permanently installed, non-contact, three phase live line indicator.

Features

• Fail safe, continuous indication of deenergisation – Needed before and during maintenance.
• Positive, continuous indication of dead to live transition – Needed during maintenance.
• Self testing function – Both automatic and operator initiated.
• Non contact sensing  – Simple new and retrofit installations. No weakening of the power system ie no fuses needed and no degradation of overvoltage withstand.

It’s different to a Live Line Indicator as alive and dead indication is positive and self testing is included

Details

Fail Safe, Continuous Indication on Deenergisation

The green LED is continuously illuminated when the circuit is dead / deenergised.

This rules out the questions:

• Did the lamp fail as I turned the switch off or is the led indicating that the power is really off? 
• Is the equipment I’m working on still positively isolated?

Positive, Continuous Indication on Energisation

The red LED is continuously illuminated when the circuit is alive / energised.

This rules out the question:

• If the equipment I’m working on is energised, will I be alerted?

Self Test Function

Self Testing is performed automatically:

• On DeadEasy 24VDC power up as part of a installation test, and
• Every alive to dead power circuit (red to green LED) transition, and
• Periodically during dead power circuit (green LED) indication.

This automatic testing is in addition to the manual testing capabilities available while the green LED is illuminated.  Every self test performs a sequence of tests as follows:

1. The master channel generates a test voltage which the slave channel is expects to detect
2. The master channel removes the test voltage which the slave channel is expects not to detect
3. The slave channel generates a test voltage which the master channel is expects to detect
4. The slave channel generates a test voltage which the master channel is expects not to detect

This 2 second test sequence results in red and green LED flashing.  The self test confirms the correct function of the sensing conductors, logic processing unit, output LEDs and all interconnecting wiring is confirmed.  A true safety rated self test!  

Non-contact Sensing

DeadEasy sensing conductors do not electrically connect to the power circuit under test.  The insulated sensing conductors are wrapped around the insulated power conductors during installation.  This approach removes the need for voltage indicator, short circuit protection devices eg fuses on the power circuit.  In addition it eradicates the risk of the mains indicator introducing a weak point into your power system.  A weak link than can fail catastrophically during power system voltage surges.  Just ask yourself – Why introduce a safety device that potentially introduces a new safety risk?

Digital Output

Active on green LED.  Allows you to log the deenergised event and/or enables field indication of the deenergised equipment, at the equipment.  Now you can match switchboard isolations with field equipment!  

Other Benefits

• Is simple to install and use.
• Has wide application.  DeadEasy is suitable for new and retrofit installations and dusty, low and high ambient light environments.
• Allows subsequent verifications without reversal of the isolation ie accommodates late working parties.