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Modern battery powered electric vehicles are inherently
very reliable and safe but even when sophisticated electronic controllers
are used it is desirable to have a means of disconnecting the battery in
the event of an emergency, such as a vehicle failing to stop, or an
electrical short circuit.
Indeed in many countries it is mandatory to fit one or
more devices to achieve an emergency disconnection of the battery. The
options are as follows;
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Manual disconnecting switches such as the Albright
"SD" and "ED" devices.
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A minimum of two contactors with their contacts in
series. This usually means a main line contactor and an additional
contactor for each major electrical circuit.
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A battery plug, providing this is within easy reach
of the vehicle driver.
Other practical considerations are the need to make the
vehicle electrically "Dead" with a keyswitch when not in use and the
ability to isolate the battery during routine maintenance.
The most cost effective means of achieving all safety,
legal and practical requirements is the Albright "SD" combined manual and
electrical disconnecting switches or alternatively a manual disconnecting
switch such as the "ED both of which are described on this web site. |
