CAH20A8BD
May not be exact product—for reference only.
- Family: CURRENT SENSING RELAY
- Current Range Monitored: 2 - 20A
- Timing: TRIP DELAY: 0.5 - 50 SEC.
- Timing Range: SENSING DELAY ON STARTUP: 1 SEC.
- Control Voltage: 24V AC/DC
- Output: 10A SPDT
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.
- 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: 2-20A
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 - 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: -28o to 65o C (-18o to 149o F)
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