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 Current Sensing Relays

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
CSR_Enclosure_Style
  • Encapsulated (504)
  • Plug-in (8)
Function
CSR_Function
  • Overcurrent & Undercurrent (168)
  • Overcurrent only (168)
  • Undercurrent only (168)
  • Overcurrent AC only (6)
  • Overcurrent AC/DC (2)
Current Range
CSR_Current_Range
  • 0.5 - 5A (170)
  • 2 - 20A (168)
  • 5 - 50A (168)
  • 0.1 - 1A (2)
  • 1 - 10A (2)
  • 5ma - 10A DC (2)
Output
CSR_Output
  • 10A SPDT (512)
Control Voltage
CSR_Control_Voltage
  • 120V AC (130)
  • 12V DC (126)
  • 240V AC (126)
  • 24V AC/DC (126)
  • 24V AC (4)
Sensing Delay on Power
CSR_Sensing_delay
  • 1 SEC. (72)
  • 2 SEC. (72)
  • 3 SEC. (72)
  • 4 SEC. (72)
  • 5 SEC. (72)
  • 6 SEC. (72)
  • No Delay (72)
  • Adjustable 0.1-10 Second (6)
  • START-UP SENSING DELAY: 0.1 - 10 SEC. (2)
Trip Delay
CSR_Trip_Delay
  • 0.150 - 7 SEC. (252)
  • 0.5 - 50 SEC. (252)

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CUH Series

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

CUH Series

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

CUH Series

Function:

Undercurrent only

Control Voltage:

24V AC/DC

Output:

10A SPDT

Trip Delay:

0.150 – 7 SEC.

Enclosure Style:

Encapsulated

Current Range:

5 – 50A

Sensing Delay on Power:

2 SEC.

$139.16

CUH Series

Function:

Undercurrent only

Control Voltage:

24V AC/DC

Output:

10A SPDT

Trip Delay:

0.150 – 7 SEC.

Enclosure Style:

Encapsulated

Current Range:

5 – 50A

Sensing Delay on Power:

3 SEC.

$139.16

CUH Series

Function:

Undercurrent only

Control Voltage:

24V AC/DC

Output:

10A SPDT

Trip Delay:

0.150 – 7 SEC.

Enclosure Style:

Encapsulated

Current Range:

5 – 50A

Sensing Delay on Power:

4 SEC.

$139.16

CUH Series

Function:

Undercurrent only

Control Voltage:

24V AC/DC

Output:

10A SPDT

Trip Delay:

0.150 – 7 SEC.

Enclosure Style:

Encapsulated

Current Range:

5 – 50A

Sensing Delay on Power:

5 SEC.

$139.16

CUH Series

Function:

Undercurrent only

Control Voltage:

24V AC/DC

Output:

10A SPDT

Trip Delay:

0.150 – 7 SEC.

Enclosure Style:

Encapsulated

Current Range:

5 – 50A

Sensing Delay on Power:

6 SEC.

$139.16

CUH Series

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:

No Delay

$139.16

CUH Series

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:

1 SEC.

$139.16

CUH Series

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

CUH Series

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:

3 SEC.

$139.16

CUH Series

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:

4 SEC.

$139.16

Frequently Asked Questions About Current Sensing Relays

 
 

Current Sensing Relays Downloads

901-0000-330 Installation Instructions CAP Series

901-0000-354 Installation Instructions CMD Series

Current Sensing Relays

Knowledge Base Articles

Technical reports to answer your questions

Macromatic Knowledge Base Articles

TAA2U and TAD1U Start, Inhibit and Reset Inputs

The Macromatic TAA2U and TAD1U offer a wide variety of functionality and application versatility by offering START, INHIBIT and RESET inputs. The information below explains the functionality of these 3 circuits. TAA2U TAD1U         START INPUT TAA2U TERMINAL 6 AND TAD1U TERMINAL 3 The START circuit initiates the timing function when

Macromatic Knowledge Base Articles

Macromatic’s Time Delay Relay Function Guide

Important questions to ask. Understanding the differences between all the functions available in time delay relays can sometimes be a daunting task. When designing circuits using time delay relays, several questions must be asked. WHAT IS THE DIFFERENCE BETWEEN A CONTROL RELAY & A TIME DELAY RELAY? Time delay relays

Macromatic Knowledge Base Articles

Time Delay Relays with Fixed Time Delay

Issue: I would like to get a time delay relay with a fixed time delay vs. adjustable to both make it easy to set up & to avoid anyone from later changing the setting. What options do I have with either your plug-in or encapsulated products? Solution/Resolution: Macromatic will build

Macromatic Knowledge Base Articles

Remote Adjustable Time Delay

Issue: How can I set the time delay remotely, either adjustable or fixed? Solution/Resolution: There may be an application requiring the setting of the time delay “remotely” or at some distance from the time delay relay itself. For example, the requirement may call for an adjustment outside the control panel

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