SSK
DESIGN ENGG
Phase Failure and Sequence Protection Relay
PLOT NO: 4158, FIRST FLOOR, T.N.H.B, AYAPAKKAM, CHENNAI - 600077, TAMILNADU, INDIA. CONTACT PH.NO: 9840292883; CLICK CONTACT TAB FOR MORE
In three phases system, When phase sequence and phase voltage are all normal, the OUT light is turned on, relay contact is energised; When there is failure of any one phase or phase sequence errors, the OUT light is off, the relay de-energizes its contact.
Phase Sequence:
When Phase sequence errors, the OUT light is off, the relay de-energizes its contact.
Voltage Asymmetry:
(asym.% ) ( fixed 40% for phase-neutral ) Phase to neutral asymmetry is fixed 40%. If asymmetry exceeds this value, the OUT light is off and the Relay de-energizes its contact. To return normal state, voltage asymmetry value must be under 15% (hysteresis)
Phase Sequence:
When Phase sequence errors, the OUT light is off, the relay de-energizes its contact.
Voltage Asymmetry:
(asym.% ) ( fixed 40% for phase-neutral ) Phase to neutral asymmetry is fixed 40%. If asymmetry exceeds this value, the OUT light is off and the Relay de-energizes its contact. To return normal state, voltage asymmetry value must be under 15% (hysteresis)
