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AC Undercurrent

CU Series

The CU Series is used to detect an undercurrent condition. The drop-out current
setting is user-adjustable within one of three ranges as shown in the Product
Selection Table below. An external current transformer can be used to extend the
range beyond 10 amperes.

The pick-up current setting is
fi xed at +5% of the selected
drop-out setting. The relay
will energize when the monitored
AC current is above the
pick-up setting. It will de-energize
when the monitored AC
current is below the drop-out
setting for a period longer
than the adjustable time delay
(t) of 0.1-10 seconds. This delay prevents nuisance tripping caused by momentary
line dips. The relay will energize when the current rises 5% above the drop-out
setting.

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Macromatic CUP01A22

CURRENT MONITOR RELAY, 0.1 - 1A, Adjustable time delay of 0.1-10 seconds on drop-out 120VAC 10A DPDT

Macromatic CUP01A28

CURRENT MONITOR RELAY, 0.1 - 1A, Adjustable time delay of 0.1-10 seconds on drop-out 24VAC 10A DPDT

Macromatic CUP01A62

Replaced with MACRO-COKP01A62

CURRENT MONITOR RELAY, 0.1 - 1A, Adjustable time delay of 0.1-10 seconds on drop-out 120VAC 10A SPDT

Macromatic CUP01A68

CURRENT MONITOR RELAY, 0.1 - 1A, Adjustable time delay of 0.1-10 seconds on drop-out 24VAC 10A SPDT

Macromatic CUP05A22

CURRENT MONITOR RELAY, 0.5 - 5A, Adjustable time delay of 0.1-10 seconds on drop-out 120VAC 10A DPDT

Macromatic CUP05A28

CURRENT MONITOR RELAY, 0.5 - 5A, Adjustable time delay of 0.1-10 seconds on drop-out 24VAC 10A DPDT

Macromatic CUP05A62

CURRENT MONITOR RELAY, 0.5 - 5A, Adjustable time delay of 0.1-10 seconds on drop-out 120VAC 10A SPDT

Macromatic CUP05A68

CURRENT MONITOR RELAY, 0.5 - 5A, Adjustable time delay of 0.1-10 seconds on drop-out 24VAC 10A SPDT

Macromatic CUP10A22

CURRENT MONITOR RELAY, 1 - 10A, Adjustable time delay of 0.1-10 seconds on drop-out 120VAC 10A DPDT

Macromatic CUP10A28

CURRENT MONITOR RELAY, 1 - 10A, Adjustable time delay of 0.1-10 seconds on drop-out 24VAC 10A DPDT

Macromatic CUP10A62

CURRENT MONITOR RELAY, 1 - 10A, Adjustable time delay of 0.1-10 seconds on drop-out 120VAC 10A SPDT

Macromatic CUP10A68

CURRENT MONITOR RELAY, 1 - 10A, Adjustable time delay of 0.1-10 seconds on drop-out 24VAC 10A SPDT


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