Zeitrelais

7PV15, SIRIUS 3RP25 and SIRIUS 3RP20 timing relays

Electronic timing relays are used in control, starting, and protective circuits for all switching operations involving time delays.

Their fully developed concept and space-saving, compact design make the SIRIUS 3RP timing relays ideal timer 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 on TH 35 DIN rails according to IEC 60175. The enclosure complies with DIN 43880.

The SIRIUS 3RA28 function modules enable the assembly of starters and contactor assemblies for direct-on-line and star-delta (wye-delta) starting. They include the key control functions required for the particular feeder, e.g. timing and electrical interlocking function. The function modules that function as timing relays are mounted quickly and simply on SIRIUS contactors – without any great wiring effort.

The SIRIUS 3RA28 solid-state time-delay auxiliary switches which can be mounted on contactors are designed for contactor coil voltages in the range from 24 to 240 V AC/DC (wide voltage range). Auxiliary switches for control and alarm signals are used specially for switching the smallest signals for electronics applications. They are used, for example, for allowing a pump or fan to run on, or for the delayed activation of a gate drive.

Device series

SIRIUS timing relays for DIN-rail mounting

• SIRIUS 3RP25 timing relays, 17.5 mm and 22.5 mm
• SIRIUS 3RP20 timing relays, 45 mm
• 7PV15 timing relays, 17.5 mm

SIRIUS timing relays for mounting on contactors

• SIRIUS 3RA28 solid-state time-delay auxiliary switches for mounting on 3RT2 contactors and 3RH2 contactor relays
• SIRIUS 3RA28 function modules for mounting on 3RT2 contactors and 3RH2 contactor relays
• SIRIUS 3RP25 timing relays for mounting on 3RT10 and 3RT14 contactors

• The right design for every application
• Clear-cut basic range with five basic units in the case of the 7PV15 timing relays, and up to seven basic units in the case of the 3RP timing relays
• Considerable logistical advantages thanks to versions with wide voltage and wide time setting range
• No tools required for assembly or disassembly on DIN rails
• Cadmium-free relay contacts
• Recyclable, halogen-free enclosure
• 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
• Versions as snap-on modules for reducing wiring and saving space in the control cabinet
• Device versions with protective coating on printed circuit board
• Versions with screw terminals or alternatively with spring-loaded terminals

Timing relays with ON-delay

• Interference pulse suppression (gating of interference pulses)
• Gradual startup of motors so as not to overload the mains

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

Clock-pulse relay

• Flashing, asymmetrical

Wye-delta timing relay

Switchover of 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 outputs
• Versions for railway applications for more exacting requirements (e.g. temperature range, vibration/shock resistance and EMC)

Watchdog function

• Monitoring of cyclic events