Current Unbalance Detector
The Model 2722 Current Unbalance Detector provides essential protection for three-phase systems. This device precisely monitors AC current, identifying imbalances that can lead to equipment damage or operational inefficiencies. It effectively compares three single-phase motors or detects open three-phase heating elements, ensuring system integrity. With an adjustable unbalance threshold from 2% to 25% and a configurable trip delay from 0.2 to 20 seconds, it offers tailored response to specific application requirements. Its robust design, featuring a 10A DPDT output contact, ensures reliable operation. The unit operates across a frequency range of 50-400Hz and tolerates temperatures from -20° to +131° F. This detector contributes to maintaining consistent performance and extending the lifespan of industrial machinery by preventing conditions that cause overheating or premature wear. It supports both automatic and manual reset options for operational flexibility.
Ph Unbal Detector
Specifications
| Input Voltage | 120VAC |
|---|---|
| Input Voltage Range | 100-130VAC |
| Power Consumption | 1.5W |
| VA Burden | 0.5VA per phase |
| Frequency Range | 50 - 400Hz |
| Current Range | 1 - 5 amps AC |
| Transient Protection | 2500V for 10ms |
| Unbalance Adjustment | 2% to 25% |
| Trip Delay | 0.2 to 20 seconds ± 5% |
| Output Contact Form | DPDT |
| Output Contact Rating | 10A at 240VAC resistive |
| Expected Relay Life (Mechanical) | 10 million operations |
| Expected Relay Life (Electrical) | 100,000 at rated load |
| Operating Temperature | -20° to +131° F |
| Humidity Tolerance | 0-97% w/o condensation |
| Enclosure Material | ABS plastic |
| Agency Approval | UL Recognized |
| Agency Approval | CSA Certified |
| Function | Monitors 3-phase AC Current |
| Function | Compares Three Single-phase Motors |
| Function | Detects Open 3-phase Heating Element |
| Reset Type | Automatic or Manual Reset |
