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TECHNICAL TERMS

n

Bulk phase

The first stage in a modern 3-step+

charging system. The output current

of the battery charger is 100 % during

this stage, while voltage depends on

the power remaining in the battery. The

bulk phase is followed by the absorption

phase.

n

BV approval

Bureau Veritas is a French classification

society for shipping, passenger vessels

and some large yachts. The requirements

in terms of safety and functionality

are stringent and approval is required

by many insurance companies. Most

Mastervolt

equipment

exceeds BV’s

rigorous

standards.

n

Cable losses

A loss of voltage resulting

from the resistance of the

cable. The losses also depend on the

current flow.

n

CE marking

Marking placed on a product by

manufacturers or importers to declare

that it meets EU safety, health and

environmental requirements. These

requirements are derived from European

product directives, which have been

incorporated into the national legislation

of most EU member states. The CE mark

therefore shows compliance with a law

and is not informal advice. It should

be visible on the outside of equipment

and suppliers have to make available a

declaration stating which requirements

of the CE marking the equipment meets.

All Mastervolt

equipment

exceeds these

rigorous

standards.

C

n

Charge voltage

Voltage used to charge batteries. On average, it amounts to 14.4 volt or 28.8 volt

during the absorption phase and 13.25 volt and 26.5 volt during the float phase,

both at 25 °C.

n

Combi

A device that combines a battery charger, an inverter and a transfer system in one.

n

Cos phi or power factor

Specifies in AC systems the degree to which current is out of phase with voltage:

The lower this value, the larger the discrepancy. In a heating element, for instance,

the current is in phase with the voltage, so the cos phi is 1. In a motor, however,

there is a divergence, and cos phi tends to be 0.8 or sometimes 0.6. The lower the

cos phi, the more current is required to supply a given amount of power.

n

Current

The flow of electrons through a circuit. Electric current is measured in amps.

n

Cycle

The theorectical discharging of a battery from 100 % to 0 %, and recharging back

from 0 % to 100 % in one cycle. Twice discharging to 50 % and fully recharging is

also one cycle, as is four times discharging to 75 % and fully recharging again. This

is all theory however: In practice a battery is discharged not more than 50 %.

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