Current Sensing Relays Series
May not be exact product – for reference only.
COH50A8AC
Lead Time:Â
10
Days
Overcurrent Only
10A SPDT
5 – 50A
0.150 – 7 Sec
No Delay
Encapsulated
function
Overcurrent Only
control voltage
24V AC/DC
output:
10A SPDT
CURRENT RANGE
5 – 50A
TRIP DELAY
0.150 – 7 Sec
SENSING DELAY ON POWER
No Delay
ENCLOSURE STYLE
Encapsulated
$139.16
Description of Function
Overcurrent Sensing. After input voltage is applied & the sensing delay on power-up (ts) is completed, the unit will begin sensing for a fault condition. A fault will occur when the monitored AC current (I) goes above the Fault Trip Current setting & remains above the Reset level for a period longer than the adjustable time delay period (t). The LED will turn ON immediately and the relay will energize after the time delay on pick-up (t) is completed. The relay will de-energize & the LED will turn OFF when the monitored AC current goes below the Reset level
Function Chart
Product Overview
Features:
Detects Overcurrent Only Monitors single phase AC current Three separate adjustable Fault Trip Current ranges covering 0.5 – 50 amperes Built-in toroidal through-hole current transformer allows easy access & multiple loops for increased sensitivity Adjustable time delay on fault trip LED indicates fault condition 10A SPDT output contacts Encapsulated for protection in harsh environments
Enclosure Style:
Encapsulated
Configuration / Contact Rating:
SPDT • 10 Amperes @ 240VAC, General Purpose; 8 Amperes @ 28VDC, Resistive; 1/4HP @ 120/240VAC; B300
SPDT • 10 Amperes @ 240VAC, General Purpose; 8 Amperes @ 28VDC, Resistive; 1/4HP @ 120/240VAC; B300
Application Information:
Voltage Tolerance: AC Operation: +10/-15% of nominal at 50/60 Hz. Load (Burden): 2 VA for all voltages Indicator LEDs: Red ON Steady when Fault occurs Current Sensing: Range: 0.5-5A Type: Toroidal, through hole wiring Setting Accuracy: Min: +0%, -50%; Max: +10%, -0% Maximum Allowable Current: Steady-25A Turns; 150A Inrush for 10 Seconds Trip Point Hysteresis: -5% Overcurrent sensing +5% Undercurrent sensing Response Times: Trip Delay (Relay ON): A: 0.150 – 7 Sec; B: 0.5 – 50 Sec; F: Fixed times i.e., F2 = Fixed 2 Sec Sensing Delay on Start-up:C: No Delay, D: 1 Sec, E: 2 Sec, F: 3 Sec, G: 4 Sec, H: 5 Sec, J: 6 Sec Time Delay on Reset (Relay OFF): 100ms Reset Time: 400ms Output Contacts: 10 Amperes @ 240VAC, General Purpose; 8 Amperes @ 28VDC, Resistive; 1/4HP @ 120/240VAC; B300 Life: Mechanical: 10,000,000 operations; Full Load: 100,000 operations Temperature: -28° to 65° C (-18° to 149° F)
Approvals:
Operations
COH products have an encapsulated construction for protection against harsh environment and detects overcurrent conditions. They are easy to mount with two screws and use 0.25″ quick-connect terminations for easy wiring. All Macromatic encapsulated current sensing relays are UL Component Recognized.
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