What can the 3VA EFB300 (External Function Box) be used for?
EFB300 external function box The EFB300 external function box provides digital outputs and inputs for 3VA6 Electronic Trip Unit circuit breakers. The functions of...
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What can the 3VA MMB300 (Maintenance Mode Box) be used for?
MMB300 maintenance mode box Operating principle of the MMB300 maintenance mode box The 3VA6 molded case circuit breakers with the electronic trip system ETUs...
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Are Siemens 3VA circuit breakers rated as current limiting?
Current limitation The term "current limitation" refers to the action of limiting the peak value of the prospective impulse short-circuit current ip to a lower...
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What affect does installation at high elevations have on the function of the 3VA circuit breakers?
When 3VA5 and 3VA6 molded case circuit breakers are used at up to 6562 ft or 2000 m above sea level, the rating data will not change. An installation altitude above...
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What different internal accessories are available for the 3VA circuit breakers?
The 3VA Circuit Breaker family offers a wide variety of internal accessories including auxiliary switches, alarm switches, shunt trips in various voltages, undervoltage...
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What does the WL Handheld test set WLTS do ?
When a customer wants to know the purpose of WLTS The WLTS performs the following valuable functions: 1) It measures the "wake-up" time of the microprocessor to make...
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What is an MLFB?
An MLFB is a German acronym for Maschinen Lesbare Fabrikate Bezeichnung, which translates to Machine-readable Product Designation. The MLFB designation follows a...
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What is the accessory burden for WL Breaker accessories?
This article provides details on accessory burden for WL Breaker. WL Accessory power consumption: Shunt trips, UVR, etc For detailed information, click here
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What is the arc flash boundry or calculation around electrical equipment?
Arc flash calculations must be performed by an electrical engineer. This data cannot be provided by a hardware supplier due to variables of on site conditions and...
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What is the difference between the three series of 3VA electronic trip units?
There are three different series of 3VA electronic trip units: 3VA 3-Series electronic trip unit has adjustment knobs and is available either ETU 320 - Long Time and...
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