Specifications

Product Type

Thermistor Motor Protection Relay

Brand

ABB

Series

CM-MSS.51

Function 2 sensor circuits; single or accumulative evaluation configurable; automatic, manual or remote reset; configurable short-circuit detection and non-volatile fault storage; dynamic interrupted-wire monitoring	Rated Control Supply Voltage (Us) 24 to 240 V AC/DC	Rated Insulation Voltage (Ui) 300 V AC
Rated Operational Voltage (Ue) 250 V	Rated Operational Current AC-15 (Ie) 3:00 AM	Timing Range Response time < 100 ms
Measuring Range PTC sensor circuit: maximum total resistance < 750 O per circuit; switch-off resistance 2.83 kO ± 1 %; switch-on resistance 1.1 kO ± 1 %; short-circuit switch-off < 12 O; short-circuit switch-on > 19 O	Rated Frequency 15 to 400 Hz	Terminal Type Screw terminals
Rated Operational Current AC-12 (Ie) 4:00 AM	Rated Operational Current DC-12 (Ie) 4:00 AM	Rated Operational Current DC-13 (Ie) 2:00 AM
Minimum Switching Capacity 24 V / 10 mA	Output 2 x 1 c/o (SPDT) contacts or 1 x 2 c/o (SPDT) contacts, configurable	Short-Circuit Protective Devices 6 A fast-acting (n/c contact); 10 A fast-acting (n/o contact)
Electrical Life 100000 cycle

Conductor Cross Section Flexible

1 x 0.5 to 2.5 mm²; 2 x 0.5 to 1.5 mm²

Conductor Cross Section Solid Core

1 x 0.5 to 4 mm²; 2 x 0.5 to 2.5 mm²

Housing Material

UL 94 V-0

Depth 103.7 mm	Height 85.6 mm	Weight 0.145 kg
Width 22.5 mm

Storage Temperature

-40 to 85 °C

Operating Temperature

-25 to 60 °C

IP Rating

IP50 (housing); IP20 (terminals)

Standards and Approvals

IEC/EN 60947-5-1; IEC/EN 60947-8; cULus E140448; CCC; EAC; ATEX; GL; RMRS; CE; RCM; RoHS

ABB CM-MSS.51S Thermister Motor Protection Relay PTC TypeA 24-240VAC/DC 1CO+2CO 15-400Hz