Summary of Contents for CHINT NJBK6 Series
- Page 1 NO:2020.09 NJBK6 Series Motor Protector User Instruction Standard: IEC/EN 60947-4-1...
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Page 2: Safety Warning
Safety Warning Only professional technicians are allowed for installation and maintenance. Installation in any damp, condensed-phase environment with inflammable and explosive gas is forbidden. When the product is being installed or maintained, the power must be switched off. You are prohibited from touching the conductive part when the product is operating. - Page 3 Use Purpose NJBK6-36 motor protector (hereinafter referred to as the protector) is applicable to the protection of overload, loss of phase, three-phase current unbalance and blocking of none-stop or intermittent duty AC motors with AC frequency 50Hz, rated insulation voltage below 690V and rated operating current 1A~36A.
- Page 4 Table 3 Main Circuit Technical Parameters Product Model NJBK6-36/3 NJBK6-36/9 NJBK6-36/24 NJBK6-36/36 Rated insulation voltage (V) Rated control supply voltage Us (V), AC220V、AC240V、AC380V，50Hz frequency (Hz) Allowable fluctuation range of rated control 85%Us~110%Us power supply voltage Rated impulse withstand voltage Uimp (kV) Rated conditional short-circuit current (kA)
- Page 5 Table 4 Auxiliary Circuit Technical Parameters NJBK6-36/3, NJBK6-36/9, Product model NJBK6-36/24, NJBK6-36/36 Rated insulation voltage (V) Rated impulse withstand voltage Uimp (kV) Agreed free air heating current Ith (A) Rated operating voltage Ue(V) 240V 380V AC-15 Use type under rated operating voltage and rated operating current Ie(A) 0.95 SCPD model...
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Page 6: Installation
Effective current value of each phase. Mean value of effective three-phase current values. 2.1.4 Motion characteristic of blocking protection: The blocking current set in the protector is 6Ie. When the current of the main circuit is greater than the blocking current, the protector motions for 3s with a delay and a relative error of ±... - Page 7 3.2 Wiring diagram: See Fig. 2 ~ Fig. 3. W1 V1 W3 V3 Figure 2 Wiring Diagram of the Protector with the Control Power Supply Voltage of AC220V/AC240V W1 V1 W3 V3 Figure 3 Wiring Diagram of the Protector with the Control Power Supply Voltage of AC380V...
- Page 8 3.3 Test/reset button instructions: “TEST/RST” on the protector is the test/reset button. Press it when the product is working normally, the protector motions and the red light flashes; press it after a fault, the protector is reset. 3.4 Adjustment of the setting current value: the protector uses the setting knobs with indicating arrows.
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Page 9: Maintenance
Maintenance 4.1 The terminal of the protector should be tightened on a regular basis. 4.2 Avoid squeezing the product; the product should be stored in a well- ventilated place. Table 6 Analysis and Troubleshooting of Common Faults Symptoms Cause analysis Troubleshooting method Whether the wire and the terminal are in reliable... - Page 10 QC PASS NJBK6 Series Motor Protector IEC/EN 60947-4-1 JDQ Check 10 Test date: Please see the packing ZHEJIANG CHINT ELECTRICS CO.,LTD.
- Page 11 NJBK6 Series Motor Protector User Instruction Zhejiang Chint Electrics Co., Ltd. Add: No.1, CHINT Road, CHINT Industrial Zone,North Baixiang, Yueqing, Zhejiang 325603,P.R.China E-mail: global-sales@chint.com Website: http://en.chint.com...
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