The ACI 117855 is a split core, normally open (NO) current switch designed for reliable load monitoring and current-sensing applications in commercial and residential HVAC systems. Its split-core design allows for quick, tool-free installation around existing conductors without interrupting the circuit — making it an ideal solution for retrofits and new installations alike.
How It Works
The ACI 117855 clamps directly onto a single conductor and senses current flow through the wire. When current in the monitored circuit exceeds the set trip point, the switch changes state — signaling a building automation system, controller, or alarm that the load is active. This makes it well-suited for proving fan operation, pump run status, compressor engagement, and other motor-load verification tasks.
Key Features
- Split-core construction for fast, no-cut installation on existing wiring
- Normally open (NO) output contact configuration
- Wide operating current range: 0.70A to 150A
- Suitable for single-conductor monitoring of motors, fans, pumps, and compressors
- Compact, durable housing designed for panel or field mounting
- Compatible with building automation and energy management systems
Typical Applications
- Fan and blower proof-of-operation verification
- Pump run status monitoring
- Compressor and motor load sensing
- HVAC equipment fault detection and alarming
- Energy management and building automation integration
Why Choose ACI
Automation Components Inc (ACI) is a trusted manufacturer of sensors and controls for the HVAC and building automation industry. ACI products are engineered for accuracy, durability, and ease of installation — helping contractors and technicians get the job done right the first time.
