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What is the significance of the the little ``H`` on the front of the LRD TeSys overload relays ?

Identifying the H and A toggle switch on the front of a D line overload relay
Product Line:
Tesys D oveload relays
Products sold and used in the United States
There is a toggle on the front of the overload that says H on one side and A on the other.

The H stands for Hand. When the OLR`s are shipped from the factory, they are in the Hand Reset mode. Remove and discard this H ``cover`` and the OLR will be converted to Automatic Reset mode.
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