3RP15051AP30 SIEMENS, 3RP15051AP30 Datasheet - Page 47

• Manufacturer Part Number: 3RP15051AP30
• Description: TIMER, MULTIFUNCTION
• Manufacturer: SIEMENS

Specifications of 3RP15051AP30

• Contact Configuration: SPCO
• Nom Input Voltage: 240V
• Delay Time Range: 0.5s To 10s
• Adjustment Type: Screwdriver Slot
• Relay Mounting: DIN Rail
• Coil Voltage Vac Nom: 240V
• Coil Voltage Vdc Nom: 24V

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Overview
Thermistor motor protection devices are used for direct
monitoring of the motor winding temperature. For this purpose,
the motors are equipped with temperature-dependent resistors
(PTC) that are directly installed in the motor winding and abruptly
change their resistance at their limit temperature.
Benefits
• Thanks to direct motor protection, overdimensioning of the
• No additional overload protection equipment is necessary.
• No settings on the device are necessary.
• Electronically optimized output thanks to variants with gold-
• Rapid error diagnosis thanks to variants that indicate open-
• Screw-type or spring-loaded terminals.
motors is not necessary.
plated contacts.
and short-circuit in the sensor circuit.
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Application
Direct motor protection through temperature monitoring of the
motor winding offers 100 % motor protection even under the
most difficult ambient conditions, without the need to make
adjustments on the device. Versions with gold-plated contacts
ensure, in addition, a high switching reliability that is even higher
than an electronic control:
• At increased ambient temperatures
• For high switching cycle frequency
• For long start-up and braking procedures
• Used together with frequency converters
(low speeds)
3RN1 Thermistor Motor Protection
Monitoring Relays
Siemens LV 1 · 2006
For PTC sensors
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