Siemens EF6 Series Manual do Utilizador descarregar pdf (Página 8)

Current monitoring:

• Only two versions from 2 mA to 10 A

• Real effective value measurement

• Applicable for frequencies with 40–500 Hz AC and DC

Power factor and active current monitoring:

• Global application thanks to wide-range voltage

between 90 and 690 V AC

• Capable of monitoring even small single-phase

motors with a no-load running current below 0.5 A

• Easy identification of threshold values thanks to

direct relationship between the measurement and

the motor load

• Window monitoring and active current measure-

ment allow for easy identification of cable breakage

between control cabinet and motor as well as phase

failure

• Monitoring of the motor load independent of

the main voltage

• Selectable power factor or I

res

(active current)

measuring principle

Applications:

The applications can be seen in the adjacent table.

These tables show the various equipment/system

states that can be detected using the monitoring

parameters.

Your advantages:

• Wide-voltage versions reduce inventory

stock levels

• Variable settings for overrange, under-

range or window monitoring

• Freely parameterizable delay times and

reset switch

• Actual value and fault type are perma-

nently displayed

• All versions have removable terminals

• All versions have screw terminals or

innovative spring-loaded terminals

3UG4 Monitoring Relays

for single-phase current, power factor

and active current monitoring

3UG4 relays that monitor current, power factor

and active current are ideal for monitoring the

load of motors and the functionality of elec-

tronic loads. These devices detect the effect

of wear and faults early on. This means that

appropriate actions can be taken long before

more significant damage occurs.

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