SIEMENS
10/35
Siemens IC 10 · 2017
Relays
Timing Relays
General data
10
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Overview
7PV15, SIRIUS 3RP25 and SIRIUS 3RP20 timing relays
Electronic timing relays are used in control, starting, and protec-
tive circuits for all switching operations involving time delays.
Their fully developed concept and space-saving, compact
design make the SIRIUS 3RP timing relays ideal modules for
control cabinet, switchgear and control manufacturers in the
industry.
With their narrow design, the 7PV15 timing relays are ideal in
particular for use in heating, ventilation and air-conditioning
systems and in compressors. All 7PV15 timing relays in this
enclosure version are suitable for snap-on mounting onto TH 35
standard mounting rails according to IEC 60175. The enclosure
complies with DIN 43880.
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Benefits
•
Clear-cut basic range with five basic units in the case of the
7PV15 timing relays, and seven basic units in the case of the
3RP timing relays
•
Logistic advantages provided by versions with wide voltage
range and wire setting range
•
No tools required for assembly or disassembly on standard
mounting rails
•
Cadmium-free relay contacts
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Recyclable, halogen-free enclosure
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Optimum price/performance ratio
•
Versions with logical separation
•
Low variance: One design for distribution boards and for
control cabinets
•
Compliance with EMC requirements for buildings
•
Environmentally friendly laser inscription instead of printing
containing solvents
•
Timing relays suitable for the 3RT miniature contactors allow
smaller tier spacing
•
Versions with screw terminals or alternatively with spring-type
terminals
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Application
Timing relays with ON-delay
•
Interference pulse suppression (gating of interference pulses)
•
Gradual startup of motors so as not to overload the power
supply
Timing relays with OFF-delay
•
Generation of overtravel functions following removal of voltage
•
Gradual, delayed shutdown, e.g. of motors or fans, to allow a
plant to be shut down selectively
Wye-delta timing relays
•
Switching over motors from Wye to delta with a dead interval
of 50 ms to prevent phase-to-phase short circuits
Multifunctional timing relays
•
Maximum flexibility, with a device for every application
•
Available with relay and semiconductor output
More information
Home page,
see www.siemens.com/relays
Industry Mall
see www.siemens.com/product?3RP
© Siemens AG 2016