The Hawkeye H934 current status switch is microprocessor-basedand comes with integral command relay, which provides a one-of-a-kind solution for monitoring status and starting/stopping motors controlled by variable frequency drives. Applications for the H934 include start/stop plus status for motors controlled by VFDs, replacement of differential pressure switches, and the microprocessor self-calibrates to changing speed and automatically monitors positive fan or pump status.
In order to provide accurate status on loads controlled by Variable Frequency Drives (VFD), the H934 stores the sensed amperage values for normal operation at various frequency ranges in nonvolatile memory. This information then allows the H934 to distinguish between a reduced amp draw due to normal changes in the frequency and abnormal amperage drop due to belt loss or other mechanical failures.
Features
The Veris H934 includes a self-calibrating microprocessor-based current sensor with a command relay for starting/stopping/monitoring VFD motors. Factory programmed to detect belt loss means no calibration required. The H934 is the only digital sensor that can detect belt loss on variable frequency drives while reducing the number of components and installation time. The self-calibrating current sensor/command relay saves time, money and panel space and the self-gripping split-core is perfect for retrofits and easy to install. The fact that one sensor does the job of two provides for the lowest total installed cost. 24VAC/DC command relay switches up to 5A@250 VAC. Non-polarity sensitive, meaning no time or money wasted on call backs due to wiring errors. Mounting bracket included.
Product Specifications
| Amperage Range |
3.5-135A (at all frequencies) |
| Sensor Power |
Induced from line |
| OUTPUT TYPE/RATING (MAX) |
N. O., Solid-State 0.1A@30VAC/DC |
| RELAY OUTPUT |
N.O., 5(3)A@250VAC, 30VDC, 1/8HP |
| Status LED |
Yes |
| Relay Power LED |
Yes |
| Insulation Class |
600VAC rms |
| Frequency Range |
35 to 75Hz. (belt loss indication); 20 to 34Hz. (on/off status) |
| Temperature Range |
-15° to 60°C |
| Humidity Range |
0 - 95% non-condensing |
| Setpoint |
Self-calibrating |
| Hysteresis |
None |
| Dimensions (LxWxH) |
2.90" x 2.58" x 1.04" |
| Sensor Opening Size (LxW) |
1.10" x .90" |
| Relay Coil |
24VAC/DC @ 15mA nom. |
| Off Delay |
0 sec. to 2 min. |
| NOTE: The H934 is not intended for use on staged pump or variable inlet vane applications. |