PFR(SINGLE SPEED ELEVATORS)
- This PFR ( Phase Failure Relay ) is used only in Single Speed & Hydraulic Elevator Control Panel.
- This Card has only three inputs that are R Phase, Y Phase & B Phase. Neutral is not required.
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Description
- This PFR ( Phase Failure Relay ) is used only in Single Speed & Hydraulic Elevator Control Panel.
- This Card has only three inputs that are R Phase, Y Phase & B Phase. Neutral is not required.
- No auxiliary Power supply required to this card. It generates operational supply from 3 phase supply only.
- This card has one ( Healthy ) Relay output with LED indication & its Common – NO relay Contact output at the connector.
- Healthy relay is ON only when all three phases are present with the proper sequence.( ie. R Phase -> Y Phase -> B Phase ).
- Either one/ two phases are not present in the card or all three phases are present but sequence is incorrect ( ie. R Phase -> B Phase -> Y Phase ) then healthy Relay is OFF.
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