TIMING TEST: Phase Contacts No. Actual Operating time at 2xVs Expected operating time (sec) R 1 3 3 +/-5% – Y 2 4 3 +/-5% – B 6 8 3 +/-5% – FINAL SETTING: Relay final voltage setting: PICKUP TEST: R Y B Voltage Setting Pick up Drop off DO/PU Pick up Drop off DO/PU Pick up Drop off DO/PU (v) (V) (V) Ratio (V) (V) Ratio (V) (V) Ratio 14 V V V % V V % V V % Note: Pickup voltage +/-5% Vs. Drop off/ Pickup ratio >85% after 3 sec delay. FUNCTIONAL TEST: ITEM DESCRIPTION CHECKED 1 All contacts checked. 2 Flag operation checked. 3 Test Switch Isolation Checked 4 CT Bus Shorting Contacts Checked
TIMING TEST: Phase Contacts No. Actual Operating time at 2xVs Expected operating time (sec) R 1 – 3 3 +/-5% Y 2 – 4 3 +/-5% B 6 – 8 3 +/-5% FINAL SETTING: Relay final voltage setting: PICKUP TEST: Voltage Setting (v) R Y B Pick up (V) Drop off (V) DO/PU Ratio Pick up (V) Drop off (V) DO/PU Ratio Pick up (V) Drop off (V) DO/PU Ratio 14 V V V % V V % V V % Note: Pickup voltage +/-5% Vs. Drop off/ Pickup ratio >85% after 3 sec delay. FUNCTIONAL TEST: ITEM DESCRIPTION CHECKED 1 All contacts checked. 2 Flag operation checked. 3 Test Switch Isolation Checked 4 CT Bus Shorting Contacts Checked
mvtp31_ct_supervision.docx