Short Circuit / Overload Protection

Question:

What is the “Short Circuit/Overload Protection” function of the drivers and how to disable it?

Answer:

The Short Circuit/Overload Protection is one of the functions of the “Premium series” Hi-Line drivers.

This function protects the drivers from any permanent damage, caused from short circuits or overloading.

It is enabled in the case of a short circuit and/or overloading of the secondary/output part of the driver.

When this function is enabled, there is no power at the output of the driver (0 Volts), even if the input power (240V) is supplied as normal.

In the case that the protection is enabled, please check for any short circuits of the installation or any overloading of the driver.

(If the 240V supply is left ON when installing the driver, the Short Circuit Protection function is likely to get enabled, even if there are no short circuits or overloads when installing is done).

Once any short circuit or overloading issues are resolved, disable the protection function.

In order to disable the Short Circuit/Overloading protection, turn the 240V supply OFF and leave it off for 5 minutes.

This “off time” allows the capacitors, inside the driver, to discharge and therefore, disables the protection function.

Then turn the power back ON and test your installation.

Note:

In the case that the loads are calculated correctly, the procedure for disabling the protection is followed and there is still no power at the output of the driver, it is a sign for a short circuit further down the line of the installation.

In order to double check this and ensure that the driver is not damaged, disconnect everything on the output part of the driver (any extra cables that are installed included) and repeat the procedure for disabling the short circuit protection. Then, once the 240V supply is back ON, test the output power of the driver.

Despina Polykarpou
Lighting Design Engineer