CURRENT SENSING RELAYS
Current Sensing Relays (sometimes referred to as current monitor relays) detect current faults in critical environments. These relays are often used to sequence operations. They can monitor ventilation and HVAC systems, locked rotor or load loss conditions, no-load conditions, conveyor jam-ups, machine tool wear, heater or lamp loads, and other critical applications.
Protect Equipment and Critical Processes
Select from a wide variety of AC & DC Current Sensing Relays. These relays protect sensitive and expensive equipment against over- or under-current conditions. Choose mounting configuration and then select from a variety of functions, time delay settings, and output configurations.
PLUG-IN
COKP Series use 8 pin octal sockets. These relays monitor AC over-current within three separate adjustable current monitoring ranges. CAP Series use 11 pin sockets. These relays monitor AC and DC over-current within three built-in current ranges.
ENCAPSULATED
CAH, COH and CUH Series offer protection in harsh environments. These relays monitor AC over-current or under-current within three adjustable current ranges. They mount and connect easily with two screws and quick-connect termination.
17.5 MM WIDE, DIN-RAIL
Multifunction CMD Series Relays monitor single phase AC and DC for over-current or under-current conditions. A band (window) function monitors within a maximum and minimum current limit. Each function can be set to operate in latch mode.
Enclosure Style
Function
Current Range
Output
Control Voltage
Sensing Delay on Power
Trip Delay
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Function:
Overcurrent AC/DC
Control Voltage:
120V AC
Output:
10A SPDT
Trip Delay:
Enclosure Style:
Plug-in
Current Range:
5ma – 10A DC
Sensing Delay on Power:
START-UP SENSING DELAY: 0.1 – 10 SEC.
$146.99
Function:
Overcurrent AC/DC
Control Voltage:
24V AC
Output:
10A SPDT
Trip Delay:
Enclosure Style:
Plug-in
Current Range:
5ma – 10A DC
Sensing Delay on Power:
START-UP SENSING DELAY: 0.1 – 10 SEC.
$146.99
Function:
Overcurrent AC only
Control Voltage:
24V AC
Output:
10A SPDT
Trip Delay:
Adjustable 0.1 – 10 seconds
Enclosure Style:
Plug-in
Current Range:
1 – 10A
Sensing Delay on Power:
$141.56
Function:
Overcurrent AC only
Control Voltage:
120V AC
Output:
10A SPDT
Trip Delay:
Adjustable 0.1 – 10 seconds
Enclosure Style:
Plug-in
Current Range:
1 – 10A
Sensing Delay on Power:
$141.56
Function:
Multi-function: Overcurrent, Undercurrent, Band (Window), each with Latching option
Control Voltage:
24-240V AC/DC
Output:
5A DPDT
Trip Delay:
Adjustable 0.1 – 10 seconds
Enclosure Style:
Din-rail
Current Range:
5mA – 100mA, 0.05A – 1 A, and 0.5 – 10A
Sensing Delay on Power:
Adjustable 0 – 10 Sec
$186.84
Function:
Overcurrent AC only
Control Voltage:
24V AC
Output:
10A SPDT
Trip Delay:
Adjustable 0.1 – 10 seconds
Enclosure Style:
Plug-in
Current Range:
0.1 – 1A
Sensing Delay on Power:
$141.56
Function:
Overcurrent AC only
Control Voltage:
120V AC
Output:
10A SPDT
Trip Delay:
Adjustable 0.1 – 10 seconds
Enclosure Style:
Plug-in
Current Range:
0.5 – 5A
Sensing Delay on Power:
$141.56
Function:
Overcurrent AC only
Control Voltage:
24V AC
Output:
10A SPDT
Trip Delay:
Adjustable 0.1 – 10 seconds
Enclosure Style:
Plug-in
Current Range:
0.5 – 5A
Sensing Delay on Power:
$141.56
Function:
Overcurrent AC only
Control Voltage:
120V AC
Output:
10A SPDT
Trip Delay:
Adjustable 0.1 – 10 seconds
Enclosure Style:
Plug-in
Current Range:
0.1 – 1A
Sensing Delay on Power:
$141.56
Function:
Undercurrent Only
Control Voltage:
24V AC/DC
Output:
10A SPDT
Trip Delay:
0.5 – 50 Sec
Enclosure Style:
Encapsulated
Current Range:
5 – 50A
Sensing Delay on Power:
5 Sec
$139.16
Function:
Undercurrent Only
Control Voltage:
24V AC/DC
Output:
10A SPDT
Trip Delay:
0.5 – 50 Sec
Enclosure Style:
Encapsulated
Current Range:
5 – 50A
Sensing Delay on Power:
6 Sec
$139.16
Function:
Undercurrent Only
Control Voltage:
24V AC/DC
Output:
10A SPDT
Trip Delay:
0.5 – 50 Sec
Enclosure Style:
Encapsulated
Current Range:
5 – 50A
Sensing Delay on Power:
2 Sec
$139.16
Frequently Asked Questions About Current Sensing Relays
The maximum monitored voltage for our encapsulated CAH, COH, abd CUH Series relays is 250V. Our relays with plug-in enclosures have a maximum voltage level of 500 V.
Yes, the CAP Series plug-in style current monitors can monitor AC and DC current. Note that these devices must be powered by AC voltage.
Macromatic relays specify the power consumed by the device as “burden” in units of VA. Look for the burden specification in the catalog page for the specific device you have. The unit of VA(volt-amps) is essentially the same as Watts(power), current draw can be calculated in Amps by taking the VA specification and dividing by the voltage control voltage you are using to power the device.
Macromatic maintains an extensive cross reference database. Follow the link here.
Current Sensing Relays Downloads
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