ACB: SENTRON 3WTPlus Microprocessor based trip unit – 3WT8161-6UA34-5BC2

Siemens 3WT8161-6UA34-5BC2 – Air Circuit Breaker (ACB)

The Siemens 3WT8161-6UA34-5BC2 is a variant of the SENTRON 3WT8 series Air Circuit Breaker (ACB) used in industrial LT power distribution systems. It is designed for high-capacity main incomer and feeder protection in PCC, MCC, transformer, and generator panels.

This belongs to the 1600A frame class (Size 1) and supports very high fault interruption capability (66 kA @ 500V AC) with advanced electronic protection.

Key Features

• Siemens SENTRON 3WT8 series ACB
• Part Number: 3WT8161-6UA34-5BC2
• 3 Pole configuration
• Rated current: 1600A
• Breaking capacity: 66 kA @ 500V AC
• Type: Withdrawable (Draw-out) Air Circuit Breaker
• Trip unit: ETU37WT LSING (microprocessor-based protection)
• Protection functions:

• Overload (Long time)
• Short circuit
• Earth fault
  • Operating mechanism: Motorized + manual spring-charged mechanism (variant dependent)
  • Auxiliary options: shunt release, auxiliary contacts, interlocks (variant dependent)
  • Mechanical lockout + trip indication system
  • IEC 60947-2 compliant design