abb-2cdc112148d0201 CM-IWS 1_动视

abb-2cdc112148d0201 CM-IWS 1

2025-09-25 17:35:10 责编:小OO

2C D C 251 078 S 0009

Insulation monitoring relay CM-IWS.1

For unearthed AC, DC and mixed AC/DC systems up to U n = 250 V AC and 300 V DC

The CM-IWS.1 serves to monitor insulation resistance in

accordance with IEC 61557-8 in unearthed IT AC systems, IT AC systems with galvanically connected DC circuits, or unearthed IT DC systems with a voltage up to 250 V AC and 300 V DC. It can be configured to the requirements of the applications and therefore used multi-functional.

Characteristics

–For monitoring the insulation resistance of unearthed IT systems

up to U n = 250 V AC and 300 V DC

–According to IEC/EN 61557-8 “Electrical safety in low voltage

distribution systems up to 1000 V a.c. and 1500 V d.c. – Equipment for testing, measuring or monitoring of protective measures – Part 8: Insulation monitoring devices for IT systems" –Rated control supply voltage 24-240 V AC/DC

–Prognostic measuring principle with superimposed square wave

signal

–One measuring range 1-100 k Ω

–Precise adjustment of the threshold value in 1 k Ω steps –Interrupted wire detection

–Fault storage / latching configurable by control input – 1 c/o (SPDT) contact, closed-circuit principle –22.5 mm (0. in) width – 3 LEDs for status indication

Order data

Insulation monitoring relay

Type Nominal voltage U n of the distribution system to be monitored

Rated control supply voltage

Order code

CM-IWS.1

0-250 V AC / 0-300 V DC

24-240 V AC/DC

1SVR 630 660 R0100

Accessories

Type Description

Order code

ADP .01Adapter for screw mounting 1SVR 430 029 R0100MAR.01Marker label

1SVR 366 017 R0100COV.01

Sealable transparent cover

1SVR 430 005 R0100

Approvals

A UL 508, CAN/CSA C22.2 No.14

C GL pending K IEC/EN 60947-5-1, CB scheme E GB14048.5 - 2001, CCC D

GOST

Marks

a CE b

C-Tick

2 - Insulation monitoring relay CM-IWS.1 | Data sheet

Functions Operating controls

2C D C 251 078 S 0009

123

1 Test and reset button

2 Status indication

U: green LED - control supply voltage F: red LED - fault message R: yellow LED - relay status

3 Configuration and setting

Front-face rotary switches for threshold value adjustment:R.1 for R1 tens figures:

0, 10, 20, 30, 40, 50, 60, 70, 80, 90 k Ω in ten k Ω steps R.2 for R1 units figures:

1, 2, 3, 4, 5, 6, 7, 8, 9, 10 k Ω in one k Ω steps 4 Marker label

Application / monitoring function

The CM-IWS.1 serves to monitor insulation resistance in accordance with IEC 61557-8 in unearthed IT AC systems, IT AC systems with galvanically connected DC circuits, or IT DC systems.

The insulation resistance between system lines and system earth is measured. If this falls below the adjustable threshold values, the output relay de-energizes.

The device can monitor control circuits (single-phase) and main circuits (3-phase).

Supply systems with voltages U n = 0-250 V AC (15-400 Hz) or 0-300 V DC can be directly connected to the measuring inputs and their insulation resistance being monitored. For systems with voltages above 250 V AC and 300 V DC the insulation monitoring relay CM-IWN.x with or without the coupling unit CM-IVN can be used.Measuring principle

A pulsating measuring signal is fed into the system to be monitored and the insulation resistance calculated.

This pulsating measuring signal alters its form depending on the insulation resistance and system leakage capacitance. From this altered form the change in the insulation resistance is forecast.

When the forecast insulation resistance corresponds to the insulation resistance calculated in the next measurement cycle and is smaller than the set threshold value, the output relay de-energizes. This measuring principle is also suitable for the detection of symmetrical insulation faults.Additional monitoring functions

The CM-IWS.1 cyclically monitors the measuring circuit connections w and KE for wire interruption. In case of a wire interruption in one of the connections, the output relay de-engergizes.

In addition, the unearthed AC-, DC- or AC/DC system is monitored for inadmissible system leakage capacitance. If the system leakage capacitance is too high, the output relay de-energizes.

The system to be monitored is connected to terminals L+ and L-. The earth potential is connected to terminals w and KE.

The device operates according to the closed-circuit principle (fault state: relay de-energized).

Once the control supply voltage has been applied the insulation monitoring relay runs through a system test routine.

The system is diagnosed and the settings are tested. If no internal or external faults are found after this test routine is completed, the output relay energizes.

If the measured value drops below the set threshold value, the output relay de-energizes. If the measured value exceeds

the threshold value plus hysteresis, the output relay re-energizes.

All operating states are signalled by the front-face LEDs. See table "LEDs, status information and fault messages" on

page 6.

Test function

The test function is only possible when there is no fault.

By pressing the front-face combined test/reset button a system test routine is executed. The output relay remains de-energized as long as the test/reset button is pressed, the control contact S1-S3 is closed or the test functions are processed.

The test function can be activated either with the front-face combined test/reset button or with a remote test button connected as shown in the picture.

Fault storage, reset function and remote reset

The output relay remains de-energized and only energizes after the combined test/reset button is pressed or after the remote reset (terminals S2-S3) is activated, and when the insulation resistance is higher than the set threshold value plus hysteresis.

Data sheet| Insulation monitoring relay CM-IWS.1 - 3Function descriptions/diagrams

G Control supply voltage not applied / Output contact open / LED OFF

B Control supply voltage applied / Output contact closed / LED ON

Insulation resistance monitoring w/o fault storage, auto reset

Insulation resistance monitoring with fault storage, manual reset

4 - Insulation monitoring relay CM-IWS.1 | Data sheet

Data sheet | Insulation monitoring relay CM-IWS.1 - 5

Connection and wiring Connection diagram

Wiring diagrams

Always connect L+ and L- to different conductors. L+ and L- can be connected to any of the conductors.U n ≤ 250 V AC; 300 V DC

2-wire AC system

3-wire AC system

4-wire AC system

2-wire DC system

3-wire DC system

Rotary switches R.1 and R.2 (treshold value)

By means of two separate 10 position rotary switches with direct reading scales, the threshold value for the insulation resistance R F of the systems to be monitored can be adjusted.

With the R.1 rotary switch the tens figure is set and with the R.2 rotary switch the units figure is set. The set threshold value is then the addition of the two values. For example, R1.1 set to 70 and R1.2 set to 8 leads to a threshold value for R1 of 78 kΩ.

Operating state indication

LEDs, status information and fault messages

Operational state LED U (green)LED F (red)LED R (yellow)

Start-up W OFF OFF

No fault V OFF V

Insulation fault

V V OFF (below threshold value)

KE/w wire interruption V U OFF

System leakage capacitance too

V T OFF high / invalid measurement result

Internal system fault OFF X OFF

Test function X OFF OFF

No fault after fault storage1)V2)X

1) The device has triggered after an insulation fault. The fault has been stored and the insulation resistance has returned to a higher value than the threshold value

plus hysteresis.

2) Depending on the fault.

Application examples

Earth fault / insulation resistance monitoring of different feeder circuits with fault localization

6 - Insulation monitoring relay CM-IWS.1 | Data sheet

Technical data

Data at T a = 25 °C and rated values, unless otherwise indicated

Input circuits

Input circuit - Supply circuit A1 - A2

Rated control supply voltage U s24-240 V AC/DC

Rated control supply voltage tolerance-15...+10 %

Typical current / power consumption24 V DC 35 mA / 0.9 VA

115 V AC17 mA / 2.0 VA

230 V AC14 mA / 3.2 VA

Rated frequency f s DC or 15-400 Hz

Frequency range AC13.5-440 Hz

Power failure buffering time min.20 ms

Start-up delay t s, fixed min.15 s

Input circuit - Measuring circuit L+, L-, w, KE

Monitoring function insulation resistance monitoring of IT systems

(IEC/EN 61557-8)

Measuring principle prognostic measuring principle with superimposed

square wave signal

Nominal voltage U n of the distribution system to be monitored0-250 V AC / 0-300 V DC

Voltage range of the distribution system to be monitored0-287.5 V AC / 0-345 V DC (tolerance +15 %) Rated frequency f N of the distribution system to be monitored DC or 15-400 Hz

Tolerance of the rated frequency f N13.5-440 Hz

System leakage capacitance C e max.10 µF

Extraneous DC voltage U fg (when connected to an AC system)max.290 V DC

Number of possible response / threshold values1

Adjustment range of the specified response value R an

(threshold)

min.-max.1-100 kΩ

Adjustment resolution 1 kΩ

Tolerance of the adjusted threshold value / Relative percentage uncertainty A

at -5...+45 °C, U n = 0-115 %, U s = 85-110 %, f N, f s, C e = 1µF

at 1-10 kΩ R F±0.5 kΩat 10-100 kΩ R F±6 %

Hysteresis related to the threshold value25 %; min. 2 kΩInternal impedance Z i at 50 Hz100 kΩ

Internal DC resistance R i115 kΩ

Measuring voltage U m22 V

Tolerance of measuring voltage U m+10 %

Measuring current I m max.0.3 mA

Response time t an

pure AC system0.5 x R an and C e = 1 µF max. 10 s

DC system or AC system with connected rectifiers max. 15 s

Repeat accuracy (constant parameters)< 0.1 % of full scale Accuracy of R a (measured value) within the rated control supply

voltage tolerance

< 0.05 % of full scale

Accuracy of R a (measured value) within the operation temperature range

at 1-10 kΩ R F

at 10-100 kΩ R F

5 Ω / K

0.05 % / K

Transient over voltage protection (w - terminal)avalanche diodeInput circuit - Control circuits S1 - S2 - S3

Control inputs - volt free S1-S3

S2-S3remote test remote reset

Maximum switching current in the control circuit 1 mA

Maximum cable length to the control inputs50 m - 100 pF/m (1 ft - 30.5 pF/ft) Minimum control pulse length150 ms

No-load voltage at the control input≤ 24 V DC

User interface

Indication of operational states

Control supply voltage U green LED

Fault message F red LED

Relay status R yellow LED

Details see table "LEDs, status information and fault messages" on page 6 and "Function descriptions/diagrams" on page 4

Operating elements and controls

Adjustment of threshold value R an R.1rotary switch, 10 kΩ steps for the tens figure

R.2rotary switch, 1 kΩ steps for the units figure

Output circuits

Kind of output relay, 1 c/o (SPDT) contact

Operating principle closed-circuit principle1)

Contact material AgNi alloy, Cd free

Rated voltage (VDE 0110, IEC 60947-1)250 V AC / 300 V DC

Min. switching voltage / Min. switching current24 V / 10 mA

Max. switching voltage / Max. switching current see "Load limits curves" on page 11

Rated operational current I e (IEC/EN 60947-5-1)

AC12 (resistive) at 230 V 4 A AC15 (inductive) at 230 V 3 A DC12 (resistive) at 24 V 4 A DC13 (inductive) at 24 V 2 A

AC rating

(UL 508)

Utilization category (Control Circuit Rating Code)

max. rated operational voltage

max. continuous thermal current at B 300

max. making/breaking apparent power at B 300B 300, pilot duty

general purpose (250 V, 4 A, cos φ 0.75) 250 V AC

4 A

3600/360 VA

Mechanical lifetime30 x 106 switching cycles Electrical lifetime (AC12, 230 V, 4 A)0.1 x 106 switching cycles

Max. fuse rating to achieve short-circuit protection n/c contact

n/o contact

6 A fast-acting

10 A fast-acting

Conventional thermal current I th (IEC/EN 60947-1) 4 A 1) C losed-circuit principle: Output relay(s) de-energize(s) if measured value falls below the adjusted threshold value R anMTBF on request

Duty time100 %

Dimensions (W x H x D)22.5 x 78 x 100 mm (0. x 3.07 x 3.94 in)

Weight gross weight0.163 kg (0.359 lb)

net weight0.133 kg (0.293 lb)

Mounting DIN rail (IEC/EN 60715), snap-on mounting without

any tool

Mounting position any

Minimum distance to other units vertical

horizontal not necessary not necessary

Degree of protection enclosure / terminal IP50 / IP20

Electrical connection

Wire size fine-strand with(out) wire end ferrule 2 x 0.75-2.5 mm² (2 x 18-14 AWG)

rigid 2 x 0.5-4 mm² (2 x 20-12 AWG) Stripping length7 mm (0.28 in)

Tightening torque0.6-0.8 Nm (5.31-7.08 lb.in)

Environmental data

Ambient temperature ranges operation-25...+60 °C

storage-40...+85 °C

transport-40...+85 °C

Climatic category IEC/EN 60721-3-33K5 (no condensation, no ice formation) Damp heat, cyclic IEC/EN 60068-2-30 6 x 24 h cycle, 55 °C, 95 % RH Vibration, sinusoidal IEC/EN 60255-21-1Class 2

Shock, half-sine IEC/EN 60255-21-2Class 2

Isolation data

Rated impulse withstand voltage U imp between all isolated circuits

(IEC/EN 60947-1, IEC/EN 606-1,

VDE 0110-1)supply circuit / measuring circuit 6 kV supply circuit / output circuit 6 kV measuring circuit / output circuit 6 kV

Pollution degree

(IEC/EN 606-1, VDE 0110-1)

Overvoltage category

(IEC/EN 606-1, VDE 0110-1)

III

Rated insulation voltage U i

(IEC/EN 60947-1, IEC/EN 606-1, VDE 0110-1)supply circuit / measuring circuit300 V supply circuit / output circuit300 V measuring circuit / output circuit300 V

Basic insulation for rated control supply voltage (IEC/EN 606-1, VDE 0110-1)supply circuit / measuring circuit250 V AC / 300 V DC supply circuit / output circuit250 V AC / 300 V DC measuring circuit / output circuit250 V AC / 300 V DC

Protective separation

(IEC/EN 61140, IEC/EN 50178)

supply circuit / output circuit250 V AC / 250 V DC supply circuit / measuring circuit250 V AC / 250 V DC measuring circuit / output circuit250 V AC / 250 V DC

Test voltage between all isolated circuits, routine test

(IEC/EN 60255-5, IEC/EN 61010-1)

supply circuit / output circuit 2.32 kV, 50 Hz, 2 s supply circuit / measuring circuit 2.32 kV, 50 Hz, 2 s measuring circuit / output circuit 2.2 kV, 50 Hz, 1 sProduct standard IEC/EN 61557-8, IEC/EN 60255-6

Other standards EN 50178

Low Voltage Directive2006/95/EC

EMC Directive2004/108/EC

RoHS Directive2002/95/EC

Electromagnetic compatibility

Interference immunity to IEC/EN 61000-6-1, IEC/EN 61000-6-2, IEC/EN 61326-2-4 electrostatic discharge IEC/EN 61000-4-2Level 3, 6 kV / 8 kV

radiated, radio-frequency, electromagnetic field IEC/EN 61000-4-3Level 3,10 V/m (1 GHz) / 3 V/m (2 GHz) / 1 V/m (2.7 GHz) electrical fast transient/burst IEC/EN 61000-4-4Level 3, 2 kV / 5 kHz

surge IEC/EN 61000-4-5Level 3, installation class 3, supply circuit and

measuring circuit 1 kV L-L, 2 kV L-earth

IEC/EN 61000-4-6Level 3, 10 V

conducted disturbances, induced by radio-frequency

fields

voltage dips, short interruptions and voltage variations IEC/EN 61000-4-11Level 3

harmonics and interharmonics IEC/EN 61000-4-13Level 3

Interference emission IEC/EN 61000-6-3, IEC/EN 61000-6-4 high-frequency radiated IEC/CISPR 22, EN 50022Class B

high-frequency conducted IEC/CISPR 22, EN 50022Class B

Technical diagrams Load limits curves

AC load (resistive )

Derating factor F at inductive AC load

DC load (resistive)

Contact lifetime

Dimensional drawings in mm and inches

CM-IWS.1 - Insulation monitoring relay

ADP.01 - Adapter for screw mounting

MAR.01 - Marker label

COV.01 - Sealable transparent cover

Further documentation

Document title Document type Document number Electronic products and relays Technical catalogue2CDC 110 004 C020x CM-IWS.1; CM-IWS.2Instruction sheet1SVC 630 550 M0000 You can find the documentation on the internet at www.abb.com/lowvoltage -> Control Products -> Electronic Relays and Controls.

ABB STOTZ-KONTAKT GmbH P. O. Box 10 16 80

69006 Heidelberg, Germany Phone: +49 (0) 6221 7 01-0 Fax: +49 (0) 6221 7 01-13 25

E-mail: info.desto@de.abb.com You can find the address of your local sales organisation on the ABB home page

http://www.abb.com/contacts

-> Low Voltage Products and Systems

Note:

We reserve the right to make technical changes

or modify the contents of this document without

prior notice. With regard to purchase orders, the

agreed particulars shall prevail. ABB AG does

not accept any responsibility whatsoever for

potential errors or possible lack of information in

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We reserve all rights in this document and in

the subject matter and illustrations contained

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