ABB Under Voltage Relay

ABB Cm-Ess.1P ABB Under Voltage Relay

The CM-ESS.1P ABB Under Voltage Relay is a single-functional voltage monitoring relay from the CM single-phase monitors range. This monitoring relay operates with a rated control supply voltage of 24 – 240 V AC / DC and has a 1 c/o (SPDT) output contact rated at 250 V / 4 A. It provides a RMS measuring principle for DC and AC voltages with 4 measuring ranges: 3-30 V, 3-60 A, 30-300 V and 60-600 V and works according to the open-circuit principle. The CM-ESS.1P is configurable for over- or undervoltage monitoring, the hysteresis is adjustable within a range of 3 to 30 % of the threshold value. A sealable transparent cover for protection against unauthorized changes is available as accessory. The device offers maintenance free Easy Connect Technology with push-in terminals.

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Specifications of ABB Cm-Ess.1P Voltage Mon. Relay

Function: Over- or undervoltage monitoring
Measuring Range: 3 … 30 V6 … 60 V30 … 300 V, 60 … 600 V
Rated Control Supply Voltage (Us): 24 … 240 V AC/DC
Output: 1 c/o (SPDT) contact
Terminal Type: Screwless Terminals
Rated Operational Current AC-12 (Ie): (230 V) 4 A
Rated Operational Current AC-15 (Ie): (230 V) 3 A
Rated Operational Current DC-12 (Ie): (24 V) 4 A
Rated Operational Current DC-13 (Ie): (24 V) 2 A
Minimum Switching Capacity: 24 V10 mA
Rated Insulation Voltage (Ui): Measuring Circuit / Output Circuit 600 V, Output Circuit 1 / Output Circuit 2 250 V, Supply Circuit / Measuring Circuit 600 V, Supply Circuit / Output Circuit 250 V
Rated Impulse Withstand Voltage (Uimp): Measuring Circuit / Output Circuit 6 kV, Output Circuit 1 / Output Circuit 2 4 kV, Supply Circuit / Measuring Circuit 6 kV, Supply Circuit / Output Circuit 4 kV
Degree of Protection: Housing IP50, Terminals IP20
Overvoltage Category: III
Pollution Degree: 3
Short-Circuit Protective Devices: Output Circuit NC – F Type Fuses 6 A, Output Circuit NO – F Type Fuses 10 A
Electrical Durability: AC-12 100000 cycle
Mechanical Durability: 30000000 cycle
Connecting Capacity: Flexible with Ferrule 2x 0.5 … 1.5 mm², Flexible with Insulated Ferrule 2x 0.5 … 1.5 mm², Flexible 2x 0.5 … 1.5 mm², Rigid 2x 0.5 … 1.5 mm²
Wire Stripping Length: 8 mm
Mounting Position: Any
Mounting on DIN Rail: TH35-15 (35 x 15 mm Mounting Rail) acc. to IEC 60715, TH35-7.5 (35 x 7.5 mm Mounting Rail) acc. to IEC 60715
Standards: CAN/CSA C22.2 No.14EN 50178EN 50581, IEC/EN 60255-27, IEC/EN 61000-6-2, IEC/EN 61000-6-3UL 508

 

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