Pyramid Car Audio PSV-300 User Manual

®

OWNER'S MANUAL

Model: PSV-300

30-AMP SWITCHING DC POWER SUPPLY

www.pyramidcaraudio.com

FEATURES

Your PYRAMID Heavy-Duty 30-Amp Switching DC Power Supply is designed to
use AC power-to-power equipment that requires 12V DC automotive power.
The power supply converts standard 120V AC household power to 13.8V DC
power and can supply up to 30 amps of continuous power.

Note: Your vehicle's electrical system provides 13.8 Volts when the

engine is running.

If you are an electronic hobbyist or technician, you will appreciate the many uses
for the power supply at your workbench or in your house.
For example, use your CB mobile transceiver as a bass station, check the
operation of auto sound systems before you install them in your vehicle, or even
power marine equipment such as pumps.

Your power supply's features include:

Regulated Output Voltage-Makes it safe to use with mobile CBs, Ham radios, CD
players, tape players or anything you would power with a vehicle's DC electrical
system.

Cooling and Fan Control a temperature controlled fan has been provided to
improve cooling at high loads.

It will come on only when the temperature of the power transformer is above 50 ºC

due to higher loads. In case the fan fails or the air flow is blocked, a second
temperature sensor mounted on the power transformer will activate over
temperature shut down at 100 ºC. The output voltage will be automatically
resumed once the unit cools down.
Electronic Overload Protection-automatically shuts off standard 120V AC input
power to the power supply when its output is overloaded.

Overheat Protection Circuit-automatically shuts off if it overheats.
Combo Output Connectors-act as both binding posts and banana plug terminals.

Not recommended for outdoor use.

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IMPORTANT SAFETY INSTRUCTIONS

DANGER: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,

CAREFULLY FOLLOW THESE INSTRUCTIONS.

WARNING: This unit should not be directly connected to a battery for charging or

for battery back-up. Battery charging and battery back-up may be undertaken
only when the battery is connected through suitable external isolating diodes and
charge limiting resistor. The isolating didode will ensure that battery does not
back power the power supply. When a battery is deeply discharged, it will initially
draw a very large charging current and force the power supply into current limit
mode for prolonged periods. This is harmful for the power supply. The charge
limiting resistor will limit the charging current to ensure the maximum charging
current is well below the current limit value of the power supply.

This manual contains important safety and operating instructions for this power
supply. Before you use the power supply, read all the instructions and cautionary
markings in this manual, on the power supply, and on the product that you will
connect to the power supply, to reduce the risk of injury:

• Do not use the power supply near water(for example, a bathtub, washbowl,
kitchen sink, laundry tub, wet basement, or swimming pooi).

• Do not place the power supply on an unstable cart, stand or table. If the power
supply falls, it could injure a person or cause serious damage to the power
supply.

• Do not overload power outlets or extension cords. An overload can result in fire
or electric shock.

• Do not use an extension cord unless absolutely necessary. Using animproper
extension cord could result in a risk of fire and electric shock. If an extension
cord must be used, make sure:
a. The pins on the extension cord's plug are of the same number, size, and

shape as those of the plug on the charger.
b. The extension cord is properly wired and in good electricai condition.
c. The extension cord's wier size is at least 18 AWG.

• Do not disassemble the charger; take it to a qualified service technician when
service or repair is required. Improper reassembly may result in a risk of
electric shock or fire.

• Do not use an attachment not recommended, this could result in a risk of
fire,electric shock, or injury to persons.

• Never push any object into the slot in the power supply. It could touch
dangerous voltage points or short out parts resulting in a fire or electrical shock.

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