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Thermal overload relay

Product Overview

  • NYKR2 series thermal overload relay (hereafter referred to as thermal relay) is mainly used for overload and open-phase protection for long-time working AC motor with AC 50HZ or 60HZ, rated insulating voltage of 690V, current 0.1-150A.
  • Thermal relay has such functions as temperature compensation, action indication, automatic and manual reset and stop, the product performance is stable and reliable.
  • The product satisfies GB14048.4, IEC60947-4-1 standard.
  • This series of thermal relay can be in plug-in installation with contactor, also can be independently installed.

Structural Characteristics

  • Could be in three-phase double-metal piece, release grade is 10A.
  • Open-phase protection;
  • Setting-current continuously adjustable device;
  • Temperature compensation;
  • Action indication;
  • Test mechanism;
  • Stop button;
  • Manual and automatic reset button;
  • Dividable one normal open and one normal close contact electrically;
  • Installation method: plug-in installation or independent installation with contactor.

Main Specifications and Technical Parameters

Items NYKR2-F25 NYKR2-F36 NYKR2-F93 NYKR2-F140
Current Grade 25 40 93 140
Rated insulation voltage 690 690 690 690
Open-phase protection
Manual and automatic reset
Temperature compensation
Release indication
Test button
Stop button
Installation method Plug-in type Plug-in type Plug-in type Plug-in type
Auxiliary contact 1NO+1NC 1NO+1NC 1NO+1NC 1NO+1NC
AC-15 220V Rated current A 2.73 2.73 2.73 2.73
AC-15 380V Rated current A 1.58 1.58 1.58 1.58
DC-15 220V Rated current A 0.2 0.2 0.2 0.2
Wire sectional area mm2 Main circuit Single-core or stranded wire 4~10 4~10 4~35 4~35
Wiring screw M4 M4 M10 M10
Auxiliary loop Single-core or stranded wire 0.5~2.5 0.5~2.5 0.5~2.5 0.5~2.5
Wiring screw M3.5 M3.5 M3.5 M3.5
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