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1 34 O � � AUTOMATIC CIF�CUIT RECLOSE�S Our r��w Vacuum Recloser has a lot more goir�g for i# than gooci looks. Electrical World, June 26. 1967 �1 U , ;: Take its r��et function for instance9 Check other reclosers and you'll find reset times as high as 300 seconds. Now check the reset-time dial on the new I-T-E Vacuum R�closer you see above. Our maximum reset time is just 30 seconds. And our minimum is just two seconds! There's good reason. When you run into a series of temporary faults (like lightning strokes) you don't want your recloser to pump through to lockour. Ours can't. It senses the fault, opens the circuit, cl�ars the fault, restores service and resets itself. And irr as little as two seconds, iYs right back where it started. Ok, you say, fast reset is great. But what if the fault's a permanent fault and trip time is longer than reset time? Won't the re- closer reset and trip, reset and trip aga;n, and never go to lockout? Glad you asked. In the first place, our reset timing starts each time the circuit's reclosed. And because of a little wrinkle we cal! "reset restraint" it can't reset if the fault's still there at the end of its reset time. The combination of fast reset and reset restraint means intermittent transient faults won't trip this recloser through its se- quence to an unwanted lockout. It also prevents a low value permanent Fault fro*n "pumping" the recloser on its fast trip and makes it unnecessary to coordinate reset time with total program time. Fresh, imaginative engineering like this has made this handsome new I-T-E unit the most exciting thing ihat's happened to re- closers in the last ten years. If you haven't seen it, give your local I-T-E application engineer a call. He has a comprehensive 24-minute film strip and will be glad to show it to you at your convenience. I-T-E Circuit Breaker Company, Philadelphia, Pennsylvania, 19130. . . �.ToE ClR�UiT ��EA�C�R C�t1AP�N1( Electrical World, June 26, 1967 35 �� �� ��1