CAH05A2BG - 

Macromatic’s CAH Series Current Sensing Relays detect either an overcurrent or undercurrent fault (selectable). These relays include user-adjustable settings for Fault Trip Current & Time Delay on Fault Trip as well as an LED to indicate fault condition. The encapsulated construction offer protection in harsh conditions. Applications such as monitoring for locked rotor or load loss condition, open heater or lamp, and process control are perfect for these products.
Features:

Monitors AC current, 0.5-5A

Trip Delay: 0.5-50 Sec

Timing Range: Sensing delay on startup: 0.4 sec

Input 120V

Three separate adjustable Fault Trip Current ranges covering 0.5-50 amperes

Built-in current transformer allows easy access & multiple loops for increased sensitivity

Adjustable time delay on fault trip

LED indicated fault condition

Encapsulated for protection in harsh environments

Pilot Duty Rating

Specifications:

10A SPDT output contacts

Temperature: –28°C to 65°C

Dimensions: 1.5" D × 2.5" W × 3.5" H

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.