Yokogawa AAP135-S00 Brand New And Original

Motor protection

The tripping characteristics of 3RV10/3RV11 motor starter protectors are designed mainly to protect induction motors. The motor starter protectors are therefore also referred to as motor-protective circuit breakers. The rated current In of the motor to be protected is set on the setting scale. Factory setting of the short-circuit release is 13 times the rated current of the motor starter protector. This permits trouble-free starting and ensures that the motor is properly protected. The phase failure sensitivity of the motor starter protector ensures that it is tripped in time in the event of a phase failure and overcurrents that occur as a result in the other phases. Motor starter protectors with thermal overload releases are normally designed in accordance with trip class 10 (CLASS 10). Motor starter protectors of sizes S2 and S3 are also available in trip class 20 (CLASS 20) and therefore allow motors to be started up under arduous conditions

Trip units

3RV1 motor starter protectors are equipped with inverse-time delayed overload release based on the bimetal principle and with instantaneous electronic trip units (electromagnetic shortcircuit releases).

The overload releases can be adjusted in accordance with the load current. The electronic trip units are permanently set to a value

13 times the rated current and thus enable trouble-free starting of motors.

Motor starter protectors for line-side transformer protection are set to 20 times the rated current to prevent tripping as a result of

high transformer inrush current.

The scale cover can be sealed to prevent unauthorized adjustments to the set current.

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