Installation / Operation / Maintenance Manual
10/28/2019
18
LAKE SHORE ELECTRIC SINGLE-PHASE STYLE
The single-phase voltage sensing relays are adjustable to 70 to 100% of the voltage range selected. Indication
of pickup or dropout can only be verified by attaching a continuity meter to the common and normally open
terminals. When the meter shows continuity, the PFR is picked up.
CALIBRATION:
1.
Remove protective black plugs (if present).
2.
Using a small slotted screwdriver, turn the dropout potentiometer fully counter-clockwise.
3.
Using a small slotted screwdriver, turn the pickup potentiometer fully clockwise.
4.
Apply required level of pickup voltage to the unit.
5.
Turn the pickup potentiometer slowly counter-clockwise until the meter shows continuity.
6.
Reduce the voltage to the required voltage dropout level.
7.
Turn the dropout potentiometer slowly clockwise until the meter shows no continuity.
SUBSTITUTE SINGLE PHASE STYLE
The single-phase voltage sensing relays are adjustable to 0 to 80% of the voltage range selected. Indication of
pickup or dropout can only be verified by attaching a continuity meter to the common, pin 11, and normally
open, pin 14, terminals. When the meter shows continuity, the PFR is picked up.