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Summary of Contents for CHINT NXR-12
- Page 1 NO:2020.04 NXR-12~100 Thermal Overload Relay 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: Main Technical Parameters
Use Purpose NXR-12~100 thermal overload relay (hereinafter referred to as thermal relay) is applicable to circuits with frequency of AC 50Hz or 60Hz, rated operating voltage up to 690V and current from 0.1A to 100A. It is used for overload protection and phase-failure protection of 3-phase AC motor. - Page 4 Table 2 (continued) Model NXR-12 NXR-25 NXR-38 NXR-100 NXC-06, NXC-40, 09,12,16 NXC-06M, NXC-25, 50,65 Matching contactor NXC-18,22 09M,12M 32,38 NXC-75, NXC-25, 85,100 32,38 Matching mounting base MB-1 MB-2 MB-3 MB-4 Rated insulation voltage Ui 690V Rated operating voltage Ue 660/690V...
- Page 5 Table 3 (continued) Setting current Specification of matching fuse Sectional area of Model range A gG (Recommend RT16) A connecting wire mm² 5.5~8 NXR-12 NXR-25 7~10 9~12 NXR-12 9~13 12~18 NXR-25 17~25 23~32 NXR-38 30~38 23~32 30~40 37~50 48~65 NXR-100...
- Page 6 cold state 3 phase 2 phase 3 phase 2 phase heat state 1 1.2 5 6 7 8 9 10 Amplification factor of setting current Figure 1 Operation time – current characteristic curve...
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Page 7: Installation
Installation 2）Installation NXR-25 STOP RESET TEST 2/T1 4/T2 6/T3 2/T1 4/T2 6/T3 Figure 2 Thermal relay outline Figure 3 Combination of thermal relay and mounting base... - Page 8 Table 4 Overall dimensions Unit：mm Model Amax Bmax Cmax NXR-12 75.3 85.1 NXR-25 93.6 NXR-38 102.9 75.1 NXR-100 126.5 61.5 Figure 4 Assembly of thermal relay and contactor...
- Page 9 4～10 4～10 4～10 4～10 L＜12mm A＞4mm, Main NXR-25 1～6 1～6 1～6 1～6 1～6 1～6 L＜10mm 1.7 N.m circuit M3.5 A＞3.5mm, NXR-12 1～4 1～4 1～4 1～4 1～4 1～4 L＜9mm 1.2 N.m M3.5 NXR-12～ A＞3.5mm, Auxiliary 0.8 N.m L＜8mm circuit 1～2.5 1～2.5 1～2.5 1～2.5 1～2.5 1～2.5...
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Page 10: Maintenance
Maintenance Conduct product test and maintenance every half a year to ensure the smooth operation of the product and the good contact of NO and NC contacts. Tighten the terminal screws with specified torque and align the protection capability of the thermal overload relay with load according to commissioning requirements. -
Page 11: Environmental Protection
QC PASS NXR-12~100 Thermal Overload Relay IEC/EN 60947-4-1 Check 21 Test date: Please see the packing ZHEJIANG CHINT ELECTRICS CO.,LTD. - Page 12 NXR-12~100 Thermal Overload Relay 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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