CHINT NR2 Series User Instruction
  1. Manuals
  2. Brands
  3. CHINT Manuals
  4. Relays
  5. NR2 Series
  6. User instruction

CHINT NR2 Series User Instruction

Thermal overload relay
Hide thumbs

Advertisement

Table of Contents

NO:2020.04
NR2 Series
Thermal Overload Relay
User Instruction
Standard: IEC/EN 60947-4-1

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the NR2 Series and is the answer not in the manual?

Questions and answers

Related Manuals for CHINT NR2 Series

Summary of Contents for CHINT NR2 Series

  • Page 1 NO:2020.04 NR2 Series Thermal Overload Relay User Instruction Standard: IEC/EN 60947-4-1...

  • 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 NR2 series 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 630A. It is used for overload protection and phase-failure protection of 3-phase AC motor.
  • Page 4 Table 2 (continued) NR2- NR2- NR2- NR2- NR2- NR2- NR2- Model 11.5 Rated operating voltage Ue 690V Rated impulse withstand voltage Uimp 220V/2.73A ; 380V/1.58A AC-15 220V 0.2A DC-13 Auxiliary circuit 1NO 1NC Auxiliary contact type Specification of matching fuse A Table 3 Combination with contactor and fuse Setting Specification of...
  • Page 5 Table 3 (continued) Setting Specification of Recommended Sectional area current Model matching fuse gG matching of connecting range A (Recommend RT16) A contactor wire mm² 0.1~0.16 0.16~0.25 0.25~0.4 0.4~0.63 0.63~1 NC1/CJX2-09 1~1.6 NC1/CJX2-12 1.25~2 NC1/CJX2-18 NR2-25 1.6~2.5 NC1/CJX2-25 2.5~4 NC1/CJX2-32 NC7-09~22 5.5~8 NC7-25~32...
  • Page 6 Table 3 (continued) Setting Specification of Recommended Sectional area current Model matching fuse gG matching of connecting range A (Recommend RT16) A contactor wire mm² NR2-150 80~104 (match NC2-115, 150 95~120 with NC2 type) 110~150 NR2-150 80~104 NC7-115, (match 95~120 with NC7 150, 170 type)
  • Page 7 cold state 3 phase 2 phase 3 phase 2 phase heat state 1 1.2 6 7 8 9 10 Amplification factor of setting current Figure 1 Thermal relay operation time – current characteristic curve...

  • Page 8: Installation

    Installation 1 Installation ） STOP RESET TEST 2 T1 4 T2 6 T3 Figure 2 Product overall dimensions (NR2-11.5~150) Figure 3 Outline dimensions of product with mounting base (NR2-11.5~93)
  • Page 9 Table 4 Overall dimensions Unit：mm Model Amax Bmax Cmax NR2-11.5 67.5 75.3 85.1 NR2-25 93.6 NR2-36 102.9 75.1 NR2-93 126.5 61.5 NR2-150 (match with NC2 type) Must combined with contactor NR2-150 (match with NC7 type) Unit：mm 40±0.2 Figure 4 Overall dimensions of NR2-200...
  • Page 10 Unit：mm 25/30* 48±0.2 44/45* 48/55* 48/55* Note: Dimensions marked with “*” means specifications for 400A and below/ specifications for 400A and above Figure 5 Dimensions of NR2-630 Figure 6 Assembly drawing of thermal relay and contactor...
  • Page 11 Table 5 Wiring parameters Wrench 120~2× NR2-630 M10 20N.m NR2-200 50~95 M8 10N.m 35~50 35~50 NR2-150 10N.m Main 4~35 4~35 NR2-93 circuit 10N.m A＞4mm, NR2-36 4~10 4~10 4~10 4~10 L＜12mm A＞4mm, NR2-25 1.7N.m L＜10mm M3.5 A＞3.5mm, NR2-11.5 5 1~2 L＜9mm 1.2N.m M3.5 NR2-11.5...

  • Page 12: Maintenance

    2) Operation and commissioning Operation indication Stop adjustable current range Reset Test Automatic reset Manual reset Figure 7 Operation diagram 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.
  • Page 13 Table 6 Analysis and Troubleshooting of Fault Symptoms Cause analysis Troubleshooting method and precautions Change to product with bigger size. Size is too small. The set current value is smaller than the actual Fine tune the cam clockwise so that the set operating current of the current matches the actual motor current.

  • Page 14: Environmental Protection

    Environmental Protection In order to protect the environment, the product or product parts should be disposed of according to the industrial waste treatment process, or be sent to the recycling station for assortment, dismantling and recycling according to local regulations.
  • Page 15 QC PASS NR2 Series Thermal Overload Relay IEC/EN 60947-4-1 Check 22 Test date: Please see the packing ZHEJIANG CHINT ELECTRICS CO.,LTD.
  • Page 16 NR2 Series 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...

This manual is also suitable for:

Nr2-11.5Nr2-25Nr2-36Nr2-93Nr2-150Nr2-200 ... Show all

Table of Contents

Save PDF