TM
CURRENT MONITORING
INSTALLATION GUIDE
Solid-Core Current Switch, Adjustable Trip Point
With Command Relay
Installer’s Specifications
Amperage Range
1-135 A continuous
Sensor Power
Induced from monitored current
Insulation Class
600 VAC RMS
Frequency Range
50/60 Hz
Temperature Range -15° to 60°C (5° to 140°F)
Humidity Range
10-90% RH non-condensing
Hysteresis
10% of setpoint, typical
Terminal Block Maximum WIre Size
14 AWG
Terminal Block Torque (nominal)
4 in-lbs (0.45 N-m)
Status Output
N.O. 1.0 A@30 VAC/DC
Relay Coil
24 VAC/DC, 10 mA
Relay Contact
Resistive: 10 A@250 VAC, 30 VDC; Inductive: 5 A@250 VAC, 30 VDC
Agency Approvals
UL508 E150462
Do not use the LED status indicators as evidence of applied voltage.
The product design provides for basic insulation only.
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Follow safe electrical work practices.
See NFPA 70E in the USA, or applicable local codes.
• This equipment must only be installed and serviced by qualified electrical personnel.
• Read, understand and follow the instructions before installing this product.
• Turn off all power supplying equipment before working on or inside the equipment.
• Use a properly rated voltage sensing device to confirm power is off.
DO NOT DEPEND ON THIS PRODUCT FOR VOLTAGE INDICATION
• Only install this product on insulated conductors.
Failure to follow these instructions will result in death or serious injury.
DANGER
Fan or Pump
CONTROLLER
DI
(Status)
DO
(Relay
Coil)
Motor
CONTACTOR
CONTROL
POWER
WIRING EXAMPLE
H738
TM
738
DIMENSIONS
NOTICE
• This product is not intended for life or safety applications.
• Do not install this product in hazardous or classified locations.
• The installer is responsible for conformance to all applicable codes.
• Mount this product inside a suitable fire and electrical enclosure.
INSTALLATION
Disconnect and lock out power to the enclosure containing the
conductor to be monitored.
1. Locate a mounting surface for the removable mounting bracket that will allow
the monitored conductor to pass through the center window when it is installed
and that will keep the device at least 1/2” from any uninsulated conductors.
Determine cable routing for the controller connection, allowing wiring to reach
the mounting location.
2. Route the conductor through the sensor’s center window and slip the assembly
into the mounting bracket. Terminate the conductor. See Notes (page 2) for
currents under 1 Amp or above 135 Amps.
3. Wire the output connections to the DDC controller or switched load (solid state
contact).
4. Secure enclosure and reconnect power.
5. Calibrate the sensor (see Calibration section).
0.2” x 0.15”
slot (2x)
1.1"
(27 mm)
2.8"
(68 mm)
0 0.7"
(19 mm)
0.9"
(23 mm)
3.0"
(75 mm)
Removable/Adjustable Mounting Bracket
3.8"
(95 mm)
4.2"
(106 mm)
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.com
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