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Technical specification guideMotor load monitoring relayRevision 1.0

Content 1.0 General information / introduction2.0 Product features / product functions3.0 Conformance / standards4.0 Approvals / certificates / marks5.0 Technical data6.0 Mechanical requirements7.0 Quality requirements8.0 Documentation9.0 Start up and adjustment10.0 Accessories

1.0 General This specification guide covers the general requirements for design,information/ manufacturing and installation of low voltage measuring andIntroduction monitoring relays for monitoring load states of motors.

2.0 Product features/ The device shall be designed for monitoring the load states of singleproduct functions and three-phase asynchronous motors.

The measuring principle should be based on an evaluation of the

phase shift () between the current and the voltage in a single phase.

The threshold limits for cos max and cos min should be

adjustable in the range of 0 to 1 via front-faced dials. Also a reactiondelay time of 0.2 s to 2 s and a starting-up delay time of 0.3 s to 30 sshould be possible to be set.

If the threshold limit for cos max or cos min is reached by the

measured cos , the output relays de-energize.

The device should have an internal electrical isolation of the supplyand the measuring circuits.

The product should be provided with the following LED indications:

- Threshold for load limit cos max exceeded (preferably red LED)

- Threshold for load limit cos min below (preferably red LED)

- Supply voltage (preferably green LED)

The motor load monitor shall be ABB type CM-LWN or pre-approved

equal.

3.0 Conformance/ The motor load monitoring relay shall be designed, manufactured standards and tested in accordance with the latest editions of applicable IEC

standards.

Product standard: IEC 255-6, EN 60255-6Electromagnetic compatibility:ESD IEC 61000-4-2, EN 61000-4-2HF radiation resistance IEC 61000-4-3, EN 61000-4-3Burst IEC 61000-4-4, EN 61000-4-4Surge IEC 1000-4-5, EN 61000-4-5

HF line emission IEC 1000-4-6, EN 61000-4-6

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Isolation:Rated voltage IEC 60255-5, IEC 664-1

250 V, 400 V, 500 V

(depending on the version)Rated impulse withstand voltage IEC 60255-5, IEC 664-1 4kVPollution category IEC 60255-5, IEC 664-1 IIIOvervoltage category IEC 60255-5, IEC 664-1 III

4.0 Approvals / Marks The motor load monitoring relayshall be approved and/ or certified bythe following organizations:

- Underwriters Laboratories (UL, cULus)- German Loyd (GL)- GOST

and shall have the following marks:- CE

5.0 Technical data The motor load monitoring deviceshall be rated in accordance withthe following specifications:

Rated supply voltage: 24-240 V AC/ DC110-130 V AC220-240 V AC380-440 V AC480-500 V AC

Rated frequency: 50-60 Hz

Number of output contacts: 21 c/o

Rated switching voltage (IEC 60947-1, IEC 664-1):250 V ACRated switching current (IEC 60947-5-1):

AC12 (resistive) @ 230 V: 4 AAC15 (inductive) @ 230 V: 3 ADC12 (resistive) @ 24 V: 4 ADC13 (inductive) @ 24 V: 2 A

Operating temperature range: -25 C +65 CStorage temperature range: -40 C +85 C

6.0 Mechanical The motor load monitor should be realized in a 45 mmrequirements wide enclosure, possible to be mounted on DIN rail according to

EN 50022. The connection terminals should be able to acceptstranded wires in the size of 2 x 2.5 mm2 (2 x 14 AWG) with wire endferrule. The enclosure should have a protection degree of IP50 andthe terminals should have a protection degree of IP20. The mountingposition of the device in a cabinet should not be limited. The productshould have a mechanical resistance of 10 g, according toIEC 68-2-6.

7.0 Quality The vendor shall be certified in accordance to ISO 9001 (qualityrequirements management system) and ISO 14001 (environmental certification).

A complete environmental product declaration (EPD) shall beavailable upon request. The EPD shall describe the material

used for the motor load monitoring relay, energy consumption, losses,etc.

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The product shall be functionally tested prior to shipment to assureproper operation per specification.

8.0 Documentation The device shall be shipped with an operation and instruction sheet

including functional diagrams, connection diagrams and set upinformation.

9.0 Startup and Startup procedures shall be intuitive and simple enough so as not toadjustment require factory assistance or training. All adjustments shall be made

from the front of the motor load monitor by using rotary switches withdirect reading scales. Relative scales should not be used.

10.0 Accessories As accessory a sealable transparent cover and a panel mountingadaptor shall be available.

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Documents

2cdc112024d0201