1. GENERAL DATA AND INFORMATION: Metering A1 + DA1 Circuit ref. Designation Panel No. Type MAKE CEWE Accuracy 0.5% of reading 2 Serial No. CT Ratio 2. MECHANICAL CHECKS AND VISUAL INSPECTION: ITEM DESCRIPTION CHECKED 1 Inspect for any physical damage or defects. 2 Verify connections as per approved drawing 3. ELECTRICAL TESTS: A. Secondary Injection Test : [ Inject a secondary current to the meter ] Calculated meter Applied Observed meter reading(A) % Error CURRENT reading(A) Current Remarks % (A) R Y B R Y B R Y B 25 0.25 50 0.5 75 0.75 100 1 % Error = (Observed meter reading-Calculated meter reading) / Full scale reading x 100. B. MAXIMUM DEMAND TEST : [ Accuracy = Class 1 ] Injection Time : 5 min Observed meter Calculated meter Applied % Error CURRENT reading(A) reading(A) Current Remarks % (A) R Y B R Y B R Y B 100 1 Testing Equipment: Calibration Date: Calibration Due Date:
1. GENERAL DATA AND INFORMATION: Circuit ref. Metering Designation A1 + DA1 Panel No. Type MAKE CEWE Accuracy 0.5% of reading 2 Serial No. CT Ratio 2. MECHANICAL CHECKS AND VISUAL INSPECTION: ITEM DESCRIPTION CHECKED 1 Inspect for any physical damage or defects. 2 Verify connections as per approved drawing 3. ELECTRICAL TESTS: A. Secondary Injection Test : [ Inject a secondary current to the meter ] CURRENT % Applied Current (A) Observed meter reading(A) Calculated meter reading(A) % Error Remarks R Y B R Y B R Y B 25 0.25 50 0.5 75 0.75 100 1 % Error = (Observed meter reading-Calculated meter reading) / Full scale reading x 100. B. MAXIMUM DEMAND TEST : [ Accuracy = Class 1 ] Injection Time : 5 min CURRENT % Applied Current (A) Observed meter reading(A) Calculated meter reading(A) % Error Remarks R Y B R Y B R Y B 100 1 Testing Equipment: Calibration Date: Calibration Due Date: