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This Siemens undervoltage release, part number 3RV29021AB4, is an accessory for the 3RV2 series of circuit breakers, specifically suitable for motor circuit breaker protection. It features a control supply voltage of 24V DC and is designed for snap-on mounting.
The device offers a rated insulation voltage of 690V and has a protection class of IP20 on the front, providing finger-safe touch protection. The operating ambient temperature range is -20°C to +60°C, with a storage temperature range of -50°C to +80°C. It has a degree of pollution of 3.
Key technical data includes a width of 18.5 mm, height of 90 mm, and depth of 68 mm. The undervoltage release is designed for use with fuse protection and has no auxiliary contacts (NC, NO, or CO). It is certified with CE, UL, and CSA approvals.
The control supply voltage is 24V DC.
It uses snap-on mounting.
The operating temperature range is -20°C to +60°C.
The protection class on the front is IP20.
It is suitable for S00, S0, S2, and S3 circuit breaker sizes.