Page 160 - EPR Catalog 2015

Thermistor motor protection relays
Technical data - CM-MSS

General data

MTBF on request
Duty time 100 %
Dimensions (W x H x D) product dimensions 22.5 x 85.6 x 103.7 mm (0.89 x 3.37 x 4.08 in)
packaging dimensions 97 x 109 x 30 mm (3.82 x 4.29 x 1.18 in)
2 see „Ordering details“ on page 90
DIN rail (IEC/EN 60715), snap-on mounting without any tool
Weight any
Mounting vertical 10 mm (0.394 in) if switching current > 2 A
Mounting position horizontal 10 mm (0.394 in) if switching current > 2 A
Minimum distance to other units UL 94 V-0
housing IP50
Material of housing terminals IP20
Degree of protection

Electrical connection Screw connection technology Easy Connect Technology (push-in)

Wire size fine-strand with(out) wire end 1 x 0.5-2.5 mm2 (1 x 20-14 AWG) 2 x 0.5-1.5 mm2 (2 x 20-16 AWG)
ferrule 2 x 0.5-1.5 mm2 (2 x 20-16 AWG) 2 x 0.5-1.5 mm2 (2 x 20-16 AWG)
Stripping length
Tightening torque rigid 1 x 0.5-4 mm2 (1 x 20-12 AWG) -
Wire end ferrule 2 x 0.5-2.5 mm2 (2 x 20-14 AWG) -

8 mm (0.32 in)

0.6-0.8 Nm (5.31-7.08 lb.in)

according to DIN 46228-1-A,
DIN 46228-4-E

Environmental data

Ambient temperature ranges operation -25 °C...+60 °C
storage -40 °C...+85 °C
Damp heat, cyclic (IEC/EN 60068-2-30) 6 x 24 h cycle, 55 °C, 95 % RH
Climatic category (IEC/EN 60721-3-3) 3K5 (no condensation, no ice formation)
Vibration, sinusoidal (IEC/EN 60255-21-1) Class 2
Shock (IEC/EN 60255-21-2) Class 2

Isolation data

Rated insulation voltage Supply circuit / Measuring circuit1) 300 V AC (CM-MSS.x2: n/a)
Supply circuit / Output circuits 300 V AC
Ui (IEC/EN 60947-1,
IEC/EN 60664-1) Measuring circuit1) / Output circuits 300 V AC

Output circuit 1 / Output circuit 2 300 V AC

Rated impulse Supply circuit / Measuring circuit1) 4 kV / 6 kV (CM-MSS.x2: n/a)
Supply circuit / Output circuits 4 kV / 6 kV
withstand voltage
Uimp (IEC/EN 60947-1, Measuring circuit1) / Output circuits 4 kV / 6 kV
IEC/EN 60664-1) Output circuit 1 / Output circuit 2 4 kV

Basic insulation Supply circuit / Measuring circuit1) 600 V AC (CM-MSS.x2: n/a)
(IEC/EN 60664-1) Supply circuit / Output circuits 600 V AC

Measuring circuit1) / Output circuits 600 V AC

Output circuit 1 / Output circuit 2 300 V AC

Test voltage, routine test Supply circuit / Measuring circuit1) 2.5 kV, 50 Hz, 1 min. (CM-MSS.x2: n/a)
(IEC/EN 60255-27) Supply circuit / Output circuits 2.5 kV, 50 Hz, 1 min.

Measuring circuit1) / Output circuits 2.5 kV, 50 Hz, 1 min.

Test voltage, type test Supply circuit / Measuring circuit1) 6 kV / 1.2 - 50 μs (CM-MSS.x2: n/a)
(IEC/EN 60255-27) Supply circuit / Output circuits 6 kV / 1.2 - 50 μs

Measuring circuit1) / Output circuits 6 kV / 1.2 - 50 μs

Output circuit 1 / Output circuit 2 6 kV / 1.2 - 50 μs

Protective separation Supply circuit / Measuring circuit1) yes, up to 300 V
(IEC/EN 61140, Supply circuit / Output circuits yes (CM-MSS.x2: n/a)
IEC/EN 50178)
Measuring circuit1) / Output circuits yes

Output circuit 1 / Output circuit 2 no

Pollution degree (IEC/EN 60664-1) 3

Overvoltage category (IEC/EN 60664-1) III

1) Potential of measuring circuit = Potential of control circuit

2/93 ABB | Catalog Electronic Products and Relays 2015 | 2CDC 110 004 C0210