Product Information
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: ⁃ Range: 2-20A
- Response Times: ⁃ Range: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
- 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)
⁃ Type: Toroidal, through hole wiring
⁃ Setting Accuracy: Min: +0%, -50%; Max: +10%, -0%
⁃ Maximum Allowable Current: Steady-50A Turns; 300A Inrush for 10 Seconds
⁃ Trip Point Hysteresis: -5% Overcurrent sensing +5% Undercurrent sensing
⁃ Range:Time Delay on Reset (Relay OFF): 100ms
⁃ Range:Reset Time: 400ms