SIEMENS 3WL9111-0AT32-0AA0 CIRCUIT BREAKER 3WL TESTING DEVICE
Test Device for Electronic Trip Units
Manual tester Release 2 for Electronic Trip Units ETU15B to ETU76B. For testing the Electronic Trip Unit functions of all 3WL ETUs (release 1 and release 2). This tester tests 3 phase L1, L2, L3, N, G, trip text, and displays the ETU status.
What is an ETU?
An Electronic Trip Unit (ETU) is programmable device which measures and times current flowing through the low voltage circuit breaker (MCCB) and initiates a trip signal when appropriate.
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