Installing a Shunt Trip in ABB TMAX Enclosed Circuit Breaker

Installing a Shunt Trip in ABB TMAX Enclosed Circuit Breaker


Welcome to GTV! Today I will be installing
a Shunt trip unit in an ABB TMAX series 3-pole T4, T5, and T6 enclosed circuit breaker. These
circuit breaker accessories should only be installed with the breaker out of circuit
or when all power has been removed from device, control panel and anything nearby that may
be a hazard to the qualified electrician doing the installation. This shunt trip kit includes
the shunt trip unit, a connector, two mounting screws, a spacer, and device labels. In front
of me are the T4, T5, and T6 circuit breakers. To install the shunt trip unit, I will need
to set the circuit breakers in the test position by switching the breaker off and then pushing
the test button here. Once they are in the test position, I can remove the screws and
take off the front plate of the T4 or T5. To remove the cover of T6, I will use a slotted
screwdriver to move the front plate down and then out. Behind the plate on the T6 is another
cover that is fastened by four screws. Removing these screws will enable me to remove the
front cover. On all models there is a side cover where the wires will be routed. This
can be removed by sliding it out of the grooves toward the front of the breaker until it is
released. I will not need this cover with my shunt trip and can discard it after my
installation. I will slide in the connector on the side. With the T4 and T5 models, I
will need to place this small spacer on the right side of the opening on the left. It
should be able to slide in with the groove that is in place. The T6 models do not have
the need for the spacer and can be discarded. The shunt trip can be placed into the left
space of the circuit breaker. I will use the larger M4x12 mounting screw for fastening
the top of the shunt trip to the breaker and I will use the M3x10 mounting screw for the
bottom. Then I can place the pins of the shunt trip’s cable into the connector. Now I will
reinstall the front cover and fasten the screws to the frame. Finally, I will apply the legend
decals on the side of the breaker for future reference. I can now have a qualified electrician
install and test the functionality of my circuit breaker and shunt trip unit. This completes
the installation of the shunt trip to the TMAX series of circuit breakers. To find out
more about this product and its accessories, please check out our other videos on GTV.
ABB’s TMAX series Accessories, along with thousands of other products and services are
available at galco.com.

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