CM-PAS.31S

Name: CM-PAS.31S
Brand: ABB
SKU: CM-PAS.31S

The ABB CM-PAS.31S is a reliable three-phase monitoring relay designed for phase sequence, phase failure, and phase unbalance detection. It ensures electrical safety and efficiency with its TRMS measuring principle and adjustable tripping delay.

Product ModelCM-PAS.31S

Material Number1SVR730774R1300

Product ID86668

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Reliable Phase Sequence DetectionThe CM-PAS.31S accurately monitors the phase sequence of your three-phase mains, ensuring that your electrical system operates within safe parameters.
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2. Advanced Phase Failure DetectionThis relay detects phase failures, providing immediate alerts to prevent potential electrical hazards and ensure continuous system operation.
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3. Adjustable Tripping DelayThe adjustable tripping delay feature allows for precise control over the relay's response time, ensuring that it trips only when necessary to avoid false alarms.
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4. TRMS Measuring PrincipleUtilizing the True Root Mean Square (TRMS) measuring principle, the CM-PAS.31S provides accurate measurements of voltage and current, ensuring reliable operation.

Technical Specifications

Detailed engineering parameters based on manufacturer documentation

Specifications may be subject to change without notice

Parameter

Value

Parameter

Value

Product Net Width

22.5 mm

Product Net Height

85.6 mm

Product Net Depth / Length

103.7 mm

Product Net Weight

0.133 kg

Function

Phase failure detection Phase sequence monitoring Phase unbalance detection

Measuring Range

(L-L) 160 ... 300 V AC

5. Easy InstallationWith its Easy Connect Technology (push-in terminals) and screw connection options, the CM-PAS.31S offers tool-free installation, making it easy to integrate into your existing electrical setup.

Time Range

200 ms start-up delay 0 s or 0.1 ... 30 s tripping delay (ON)

Rated Control Supply Voltage (Us)

(L-L) 160 ... 300 V AC

Rated Frequency (f)

Supply Circuit 50/60 Hz

Output

2 c/o (SPDT) contacts

Terminal Type

Screw 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 V 10 mA

Rated Impulse Withstand Voltage (Uimp)

Input Circuit 6 kV Output Circuit 4 kV

Rated Insulation Voltage (Ui)

Input Circuit / Output Circuit 600 V Output Circuit 1 / Output Circuit 2 300 V

Degree of Protection

Housing IP50 Terminals IP20

Overvoltage Category

III

Pollution Degree

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 1x 0.5 ... 2.5 mmÂ² Flexible with Ferrule 2x 0.5 ... 1.5 mmÂ² Flexible with Insulated Ferrule 1x 0.5 ... 2.5 mmÂ² Flexible with Insulated Ferrule 2x 0.5 ... 1.5 mmÂ² Flexible 1x 0.5 ... 2.5 mmÂ² Flexible 2x 0.5 ... 1.5 mmÂ² Rigid 1x 0.5 ... 4 mmÂ² Rigid 2x 0.5 ... 2.5 mmÂ²

Tightening Torque

0.6 ... 0.8 NÂ·m

Wire Stripping Length

8 mm

Recommended Screw Driver

0.8 x 4 4.5 Pozidriv 1

Mounting Position

1 ... 6

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.14 IEC/EN 63000 IEC/EN 60255-27 IEC/EN 61000-6-2 IEC/EN 61000-6-3 UL 508

Maximum Operating Voltage UL/CSA

Output Circuit 300 V AC

Contact Rating UL/CSA

B300

Connecting Capacity UL/CSA

Flexible 1x 18-14 AWG Flexible 2x 18-16 AWG Rigid 1x 20-12 AWG Rigid 2x 20-14 AWG

Tightening Torque UL/CSA

7.08 inÂ·lb

Pilot Duty UL/CSA

B300

Flammability According to UL94

V-0

Ambient Air Temperature

Operation -25 ... +60 Â°C Storage -40 ... +85 Â°C

Maximum Operating Altitude Permissible

Without Derating 2000 m

Object Classification Code

ETIM 7

EC001441 - Phase monitoring relay

ETIM 8

EC001441 - Phase monitoring relay

ETIM 9

EC001441 - Phase monitoring relay

eClass

V11.0 : 27371803

UNSPSC

39122332

E-Number (Finland)

2712282

E-Number (Norway)

4188159

E-Number (Sweden)

3860579

Manufacturer ID

1SVR730774R1300