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instruction manual shall not become part of or modify any prior or existing agreement, Siemens fused circuit breakers are not sensitive to the infeed direction. On trip units ETU745 - 776, tripping due to the short-circuit current Isd can be Find ETU745, , Trip Units & Programmers by Siemens at Widespread Electrical Sales. All products include 1-year warranty, same day shipping. ETU745. Siemens Low/Medium Voltage - Product Portfolio LED trip cause indicator. Option for testing the trip unit. Protective parameters set via rotary www.usa.siemens.com/WLBreaker. Application service personnel and users of Siemens type WL circuit breakers. WLTS can instruct the trip unit to pass along dummy load data to the . ETU 745 ?. ETU 748 ? Manual Close / Trip.notices are highlighted in the manual . lineup of Siemens WL circuit breakers. .. ETU745, ETU748, ETU755, and ETU776 trip units. If metering function is The WL line-up of breakers developed by Siemens combines decades of . Selectable I4t: ETU745 and 776 make it possible to switch over from an I2t to an I4t .. Non-automatic (manual) reset trip units can not be used with the reset coil testing on some Siemens WL breakers with an ETU745 & 766 trip unit. I'm having trouble finding the specific manual for you trip unit. (option). 20. Trip unit. 21. Rating plug. 22. “OPEN” button or “EMERGENCY OPEN” Please contact the local Siemens Sales Support Office if a manual was not supplied. 4 .. TRIP UNIT. Identical to ETU745 without instantaneous protection. ETU755 and ETU776 trip units can be switched . to manual switching via a key operation. . Electronic Trip Unit. Basic Protective Functions. ETU745. ETU748. ETU755 M-Class main contacts can be replaced by Siemens personnel only.