Siemens EF6 Series Manual do Utilizador descarregar pdf (Página 4)

Your advantages:

• All versions have removable terminals

• All versions with screw terminals or with

the innovative spring-loaded terminal system

• Labels are used to document the function that

has been set at multi-functional timing relays

•

Transparent range for every application:

Only seven basic devices

• Significant advantages when using multi-

function timing relays with wide-range voltage

• Optimum price/performance ratio

• Positively-driven relay contacts

can be used in safety-relevant circuits up to

Category 2 according to DIN EN 954-1

• Hard-gold-plated relay contacts for optimum

interaction with electronic controls

• Sealable cover to secure parameters that have been set

Engineering information:

• For the “clock-pulse” function, pulse and interval

can be separately set, for the flashing function it is

pulse and interval 1:1

• “Time addition” function (no holding on supply failure

function) for the multi-function relays: By activating

the start contact

3RP15/3RP20 Timing Relays

for rail mounting

Applications:

On delay:

• Noise pulses are suppressed

• Motors are started step-by-step to ensure that the

line supply is not subject to excessive stress.

Off delay:

• Run-on functions are generated after the control

voltage is removed (fan run-on)

• Emergency shutdown or to bring a plant or system

into a defined state when the power supply

voltage has failed

Star/delta:

• Motors are changed-over from a star to a delta

configuration with a fixed interval time of 50 ms

in order to prevent short circuits between phases

Electronic 3RP1/3RP2 timing relays are used

for all switching operations in starting, protec-

tion and open- and closed-loop control circuits

that require time delay functions. Due to their

well-proven concept and their space-saving,

compact design, they are the ideal timing de-

vices for cabinet, panel and control manufac-

turers from all areas of industry.

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