ABB 1SEP408149R0005 CT-ZLBM123-600/5-0.5-BB 5VA Rear-Side Current Transformer

Built for higher-precision metering, the ABB 1SEP408149R0005 CT-ZLBM123-600/5-0.5-BB is a 600/5 A rear-side current transformer with class 0.5 accuracy and a 5 VA burden, fitted to the ZLBM123 Inline fuse switch disconnector. The 0.5 class halves the permitted error of the standard class 1 kit, useful where the panel meter feeds billing or energy-management data. Net weight is 1.3 kg.

Technical Specifications

Selection Notes

Specify this class 0.5 kit over the standard-accuracy class 1 variant in the same 600/5 A ratio when the reading feeds a revenue meter or an energy-monitoring system that needs tighter accuracy. For a simple panel ammeter where tenths-of-a-percent error is irrelevant, the standard class 1 version is the lower-cost choice. Both the class 0.5 and class 1 kits in this 600/5 A ratio fit the same ZLBM123 rear-side location, so the decision rests solely on the instrument downstream, not on the switch itself.