T&R 228-1, Operating And Maintenance Manual, Page: 7 / 56

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3.5.3 Test Procedure 45
3.6 Using the Control Unit as a Dual Contact Timer 45
3.6.1 Timer Mode 45
3.6.2 Connections 45
3.6.3 Test Procedure 45
3.7 CT Polarity 46
3.7.1 Modes & Settings 46
3.7.2 Connections 46
3.7.3 Test Procedure 46
3.8 CT Ratio 47
3.8.1 Modes & Settings 47
3.8.2 Connections 47
3.8.3 Test Procedure 47
4 MAINTENANCE 49
4.1 Output Control Brushes 49
4.2 Removal of the CU-Ps from Case 49
5 STANDARD ACCESSORIES 51
5.1 Spare Fuses Supplied 51
5.2 Standard Accessories Supplied 51
5.3 Optional Accessories Supplied 51
6 OVERALL PERFORMANCE SPECIFICATION 53
6.1 Insulation Resistance at 1000V DC 53
6.2 Applied Voltage Test 53
6.3 Accuracy of Instruments 53
6.3.1 Loading Unit Current Output 53
6.3.2 Secondary Injection Current Output 54
6.3.3 Auxiliary Metering Input 54
6.3.4 Timing System 54