Device Description; Overload Protection - Siemens 3RB22 Manual Del Usuario

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Device description

Overload
protection
Thermistor
protection
3ZX1012-0RB22-1AA1
!
Limited shock protection
Degree of protection acc. to IEC 60529: IP20
Commissioning and maintenance by skilled
personnel only.
Read and understand these instructions before installing, operating, or
maintaining the equipment.
!
Hazardous voltage.
Will cause death or serious injury.
Turn off and lock out all power supplying this device
before working on this device.
Reliable functioning of the equipment is only ensured with
certified components.
The electronic overload relay, consisting of the 3RB22/23 evaluation
module and a 3RB29.. current measurement module, protects electric
equipment (e.g. 3-phase motors) using two different protective
mechanisms. Feeder ground fault detection is also available as an option.
The relay compares the momentary motor current flowing through
the current measurement module with the set value, processes
these values in a microcontroller and releases if necessary.
PTCs (thermistors) in the motor winding measure the motor
temperature. If the temperature specified by the thermistor is
exceeded, the relay will trip. The thermistors are monitored for
short-circuits and line breaks (wire breaks).
DANGER
DANGER
Device description
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