Hawkeye Adjustable Split Core Current Switch w/ Command Relay, 2.5 – 135A

Overview:

The H938 is a current-sensitive switching device with integral command relay that monitors current (amperage) in the conductor passing through it. A change in

amperage in the monitored conductor that crosses the switch (setpoint) threshold plus the hysteresis value will cause the resistance of the status output to change state, similar to the action of a mechanical switch. This status information can be fed back to a building controller that interprets the signal and separately switches the relay. The status output can also be used to switch the relay directly.

In this model, the setpoint is adjustable through the action of a twenty (20) turn potentiometer (see the CALIBRATION section). The status output is suitable for connection to building controllers or other appropriate data acquisition equipment operating at up to 30 volts. The H938 relay requires a 24VAC/VDC external power supply for operation.

The H938 housing offers unprecedented mounting flexibility. The mounting bracket can be attached in three different places. Additionally, the bracket is compatible with the Veris AH01 DIN Rail clip, allowing DIN mounting.

Specifications:

• Sensor Power: Induced from monitored conductor
• Insulation Class: 600VAC RMS
• Frequency Range: 50/60Hz
• Temperature Range: -15 to 60C (5 to 140F)
• Humidity Range: 10-90% RH, non-condensing
• Hysteresis: 10% Typical
• Terminal Block Maximum Wire Size: 14 AWG
• Terminal Block Torque (nominal): 4 in-lbs (0.45 N-m)
• Agency Approvals: UL 508 open device listing