Power Racing Series Wiki

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.
====== Kill Switch ======

A Kill Switch is **REQUIRED**.

It is considered safety equipment, and therefore exempt from the budget.

The Kill Switch should be easily recognizable as such, so that a Track Marshal or any racer can easily disable a runaway car.

Many cars use the [[https://www.amazon.com/HELLA-002843011-Rating-Battery-Master/dp/B0000AYAFE/|HELLA 2843 Series 100A Battery Master Switch]]

{{:cars:hella-kill-swtich.jpg?300|}}

There are cheaper ones on eBay, usually listed with names like [[http://www.ebay.com/itm/152151158520|12V/24V Car Truck Boat Battery Isolator Disconnect Cut Off Power Kill Switch]].

(Milwaukee Makerspace had a big pile of e-stop switches so we've used those on all of our cars. Typically the e-stop switches aren't rated for high-current, so we use it to control a relay that can handle the high-current.)

===== Dead Man Switch =====

Though not used as much since 2014, some cars also have a Dead Man Switch. Typically this is a small rope that goes around a drivers wrist with a wire loop and an Anderson connector. If the driver becomes separated from the vehicle (or yanks their arm too far from the steering device) the connector disconnects killing power to the car.

This is a schematic of the wiring for a 36v battery and a 12v main contactor. (Notice that the relay coil is only getting 12v from the 36v pack.)

{{:cars:ppprs_wiring.png?nolink|}}

Make sure your heavy contactor can handle the current and is designed for continuous use. (Note: starter relays will burn up if left turned on!)

Here's a [[http://www.surpluscenter.com/Electrical/Relays-Contactors-Solenoids/DC-Relays-Contactors-Solenoids/12-VDC-SPST-CONT-DUTY-INSULATED-STEEL-CASE-SOLENOID-11-3278.axd|12v continuous duty solenoid in an insulated steel case]] that can handle 80 amps. The 2 pin connector can be anything, but Milwaukee Makerspace has had good luck with [[http://www.powerwerx.com/anderson-powerpoles/powerpole-sets/15-amp-red-black-anderson-powerpole-sets.html|these Anderson powerpoles]] on short wires.
Power Racing Series Wiki

User Tools

Site Tools

Page Tools
