Current monitoring relay CRC-23
under-currentover-currentAC

Current monitoring relay - CRC-23 - Lettel - under-current / over-current / AC
Current monitoring relay - CRC-23 - Lettel - under-current / over-current / AC
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Characteristics

Measured/monitored value
current, under-current, over-current
Network
AC, DC
Mounting
DIN rail
Reset
manual reset
Norms
IEC
Other characteristics
adjustable, multifunction
Tripping current

Min.: 0.32 A

Max.: 16 A

Description

The CRC-23 relay is equipped with 2 independent relays that can be switched upon reaching the minimum or maximum current thresholds, for circuit control or load shedding functions. - Electrical: Power supply 230V 50/60Hz. 2 single-pole changeover relays 16A/250V, usable as 1 relay for each current threshold or 2 relays for a single threshold depending on the setting. - Current Measurement: Selection of alternating or direct current. 3 adjustment ranges available depending on wiring: 1…5A / 0.32…1.6A / 3.2…16A. Direct connection or via 5A current transformer. - Programming: 2 independent minimum and maximum level thresholds, adjustable from 20 to 100% of the max current. Trigger delay adjustable from 0.1 to 10 seconds for each threshold. Reset function by activatable Reset button. Hysteresis adjustable to 5 or 10%. - Physical: Clip-on DIN rail housing, width 3 modules (54mm). Front panel potentiometer adjustments. Indicator lights for voltage presence and relay status. - Protection of circuits: Allows cutting off the power supply in case of undercurrent or overcurrent indicating a failure in the measured circuit. - Trigger an alarm: Signals an overcurrent in a circuit to an operator for risk prevention or failure. Automatically sheds load in case of circuit overload. - Load shedding: The maximum current threshold relay can be used for automatic load shedding. - Multifunction: Designed to control a circuit in alternating or direct current, 2 adjustable thresholds on 3 selectable current ranges. - Connection: Direct up to 16A or via 5A secondary current transformer, allowing protection of high-power circuits. - Compliance: CE, RoHs, REACH. - Applicable standards: EN 60255-6, EN 61010-1 - Technical Specifications: - Power supply: 230V 50/60Hz - Relay outputs: 2 SPDT 16A/250V - Current measurement: AC or DC, 3 ranges (1…5A / 0.32…1.6A / 3.2…16A) - Direct connection or via 5A current transformer - Adjustable thresholds: 20–100% of max current - Trigger delay: 0.1–10s - Reset function: Yes - Hysteresis: 5% or 10% - DIN rail mounting, 3 modules (54mm) - Front panel potentiometer adjustment - Indicator lights for voltage and relay status - Certifications: CE, RoHs, REACH - Standards: EN 60255-6, EN 61010-1
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