Abb Sace Pr121 P Manual

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  1. Abb Sace Pr121 P Manual 2016
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AbbWelcome to G-TV! Today I will be showing you how to set up the ABB TMAX Electronic Circuit

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Breaker. On the front of ABB circuit breakers with an electronic trip unit, are a groupof dip switches. For demonstration purposes, I will be using the PR221DS dip switch setup. This offers a protection against overloads with a long inverse time delay, and shortcircuits with either an instantaneous or an inverse time delay trip. My first set of dipswitches is labeled L for protection against overloads. Here I can set my tripping thresholdwhich is set to .4 of the maximum current rating of the circuit breaker when all theManualdip switches are set down. I can switch any number of dip switches with a screwdriverto change the overload tripping threshold up to 100 percent. The values increase inaddition to the .4, so if I have the first two switches of .04 and .08 up, then my overload

Abb Sace Pr121 P Manual 2016

threshold would .52 or 52 percent of the maximum current rating. I can also set the trip curvetime delay with the t1 dip switch here. This is set for 6 times the trip threshold. Mynext set of dip switches is for setting either a short time delay with S or an instantaneoustime delay with I. When the S function is selected, the dip switches at T2 will determinewhether the trip time is set to 1/10th of a second or a quarter of a second. The dip

Abb Sace Pr121 P Manual Online

switches in the middle will determine the short circuit threshold. This can be from1 to 10 times the maximum current rating of the circuit breaker. My last dip switcheson the right are for setting the neutral. This can be turned on or off and can be setto 50 or 100 percent. For circuit breakers in the T4 through T6 range, this can be setdirectly from the front. ABB TMAX Electronic Circuit Breaker along with thousands of other

Abb Sace Pr121 P

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