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NJBK2 Dataheets PDF



Part Number NJBK2
Manufacturers CHiNT
Logo CHiNT
Description Motor Protection Relay
Datasheet NJBK2 DatasheetNJBK2 Datasheet (PDF)

Relay Protection Relay NJBK2 Motor Protection Relay 1. General NJBK2 series motor protection relay (hereinafter referred to protector as simply) is applicable for overload, locked-rotor, phase-failure, three phase current unbalance, earthing and PTC temperature protection of AC motor @ A.C.50Hz, less than 660V rated operating voltage and 2A ~ 800A rated operating current for its continuous working or discontinuous working. This product meets the requirements of IEC 60947- 4-1 2. Type designatio.

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Relay Protection Relay NJBK2 Motor Protection Relay 1. General NJBK2 series motor protection relay (hereinafter referred to protector as simply) is applicable for overload, locked-rotor, phase-failure, three phase current unbalance, earthing and PTC temperature protection of AC motor @ A.C.50Hz, less than 660V rated operating voltage and 2A ~ 800A rated operating current for its continuous working or discontinuous working. This product meets the requirements of IEC 60947- 4-1 2. Type designation N JBK 2 - □/□□ Supply voltage Specification of rated current Rated current of the casing Design sequence No. Motor protection relay Company code 3. Operation conditions 3.1 Altitude ≤2000m. 3.2 Ambient air temperature -5℃ ~ +40℃, with daily average ≤+35℃. 3.3 Atmospheric condition: when the highest temperature is +40℃, relative humidity of air shall be no more than 50%, higher relative humidity shall be allowable at lower temperature. The max monthly average relative humidity of the most humid month shall be not more than 90% and the lowest monthly average temperature of the same month should be no more than +25 ℃, condensed dew on surface of the product due to the change of the temperature should be taken into account. 3.4 Pollution Level: Level 3. 3.5 Installation Category: Ⅲ. 3.6 Inclination between installation plane and vertical plane shall ≤±5°. 3.7 At places without prominence rock, impact and vibration. 3.8 At places without explosive risk, without gases that may be corrosive to metal or gases that may cause damage to the insulation, and with little conducting dust 3.9 At places where rain & snow proof facilities are equipped with and not being full of steam. 4. Technical data 4.1 Main circuit: rated insulation voltage AC690V, rated frequency 50/60Hz. Type Rated Setting current Suitable motor current (A) range (A) power (kW) NJBK2-200/10 NJBK2-200/50 NJBK2-200/200 NJBK2-400/400 NJBK2-800/800 10 50 200 400 800 2~10 10~50 40~200 160~400 320~800 1~5 5~25 20~100 80~200 160~400 4.2 Auxiliary circuit: rated insulation voltage AC380V, rated frequency 50Hz/60Hz, Utility classes, rated operating voltage, rated operating current and conventional heating current. Utility classes AC-15 Rated operating voltage (V) 240 380 Rated operating current (A) 1.5 0.95 Conventional heating current (A) 10 5. Design features 5.1 Equipped with functions of overload, locked-rotor, phasefailure, three-phase unbalance, earthing and PTC temperature protection etc. 5.2 Six indicators indicate status of power supply, operation, phase-failure (three phase unbalance), overload, earthing and temperature, respectively. Equipped with function of fault memory. 5.3 four kinds of trip class 5.4 Digital dial-up settings with high precision. 5.5 Three kinds of reset modes: manual reset, remote manual reset and automatic reset I > >> I-06 Relay Protection Relay 5.6 Installation mode: installation in parts and integral installation. Transformer Installation: bolts installation and Track installation. Relay Installation: Rapid Track installation through meter. 5.7 Equipped with function of six times of current to test [Test by 6 times of the current]. 6. Protection features 6.1 Operation characteristics under three-phase balanced-load status S.N. Times of setting current Trip class Operation time 1 1.05 2 1.2 3 1.5 4 7.2 10A 10 <2h non-tripping 20 30 10A 10 <2h tripping 20 30 10A <2min 10 <4min 20 <8min 30 <12min 10A 2s >> Relay Protection Relay 6.6 Reset feature:Manual reset, automatic reset and remote manual reset are available for option Resetting time varies according to different trip class, among the range of 4min to 12min. 7. Wiring diagram 7.1 Wiring diagram for control power supply @ AC220V/AC230V voltage Wi.


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