Contax POWER MODULE SYSTEM Manuel d'utilisateur télécharger pdf (Page 35)

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D.34

Comfort functions

Function

Priority relays offer the possibility to

limit the energy consumption

in installations with a defined

maximum power. This limitation is

getting measuring the installation

total current continuously and in the

case consumption would be higher

then fixed value, priority relay would

disconnect the non-priority load.

Series PR

Applications

In some installations the maximum power is limited by the contracted power

with the electricity company. If this contracted power is surpassed, the main

MCB of the installation opens. Priority relays are used in order to avoid the

opening of the main MCB.

A similar case, for exemple, would be an installation where new loads would

be added without changing the installation (cable sizes, MCB’s...). In this

case a priority relay will be installed before the non priority load that would

be disconnected when the contracted or limited power is

surpassed. Priority... disconnected. The priority relay will realise that the

installation total load will come back to be lower than its..., the non priority

load will come back to be connected.

Characteristics

Priority relay can work in nets with nominal power of 6 kW if we make a

direct connection or higher if we use a current transformer to connect the

priority relay to the net. In each case priority relay could be able to

disconnect loads with a nominal power from 0 to 6kW or from 0% to

100% when current transformer is used.

Standard/Marking

IEC 61095

Priority and sequence phase relays

Performance

Priority Relay Series PR

Nominal Voltage Un 230V

Maximum nominal current 32A direct, 5A with current transformer

Nominal current 2...32A

Compact capacity Pozidriv 1/2x2.5mm

or 1x6mm

Contact type NC or NO

Work temperature -20...+55°C

Work area 0 to 7 kW

Fixed delay time 0.5sc

Isolation tension (contact-coil) 2.5 kV

Isolation class II

IP IP20

Electrical endurance 100,000 ops.

Mechanical endurance 1,000,000 ops.

Maximum changeover frequency 750 ops./h

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 51 52

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Contax POWER MODULE SYSTEM Manuel d'utilisateur Page 35

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