Macromatic - Current Sensing Relay; Over/Under; 120VAC; 2-20A SPDT Adj Trip Dela

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..

Undercurrent 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 below the Fault Trip Current setting & remains below 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 above the Reset level.

Features

Detects either an Overcurrent or Undercurrent Fault (selectable)
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 2.5" x 3.5" enclosure with dual screw mounting

Configuration / Contact Rating

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 CAH20A:

Response Times:

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)

See datasheets for more details

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