3RU5 Thermal Overload Relay
Keywords:
西门子
热过载继电器
3RU5
SIEMENS
Keywords:
3RU5 Thermal Overload Relay
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3RU5 Thermal Overload Relay
Applications: Can be used for the protection of three-phase and single-phase AC motors. For the protection of single-phase AC or DC loads, three poles must be used in series.
Ambient temperature: 3RU5156 has temperature compensation in the range of -25ºC to +55ºC. 3RU5166/3RU5176 has temperature compensation in the range of -20ºC to +60ºC.
Tripping rating: Class 10
Tripping characteristic curve: At operating temperature, the tripping time will be reduced by about 25%.
Tripping type: Tripping type
Reset type: Manual and automatic reset, the reset time depends on the tripping current size and characteristics.
Protection rating compliant with IEC60529 standard: IP00 （ open ）， IP20 （with terminal cover）
Finger protection compliant with IEC61140 standard: Finger safety (with terminal cover)
Impact resistance compliant with IEC60068-2-27 standard: 8/10g/ms
Altitude: Up to 2000m
Main Circuit
Rated insulation voltage Ui （Pollution degree 3 ）：1000V
Rated insulation voltage Ui （Pollution degree 3 ）：1000V
Rated impulse withstand voltage Uimp ：8 KV
Rated operating voltage Ue ：1000V
Current type AC available, frequency up to 400Hz
Safety insulation between main and auxiliary circuits Compliant with IEC60947-1 standard: 1000V
Auxiliary circuit
Number of normally open contacts: 1
Number of normally closed contacts: 1
Auxiliary contact allocation: 1 NO Provides a "tripping" signal, 1 NC Used to disconnect the contactor
Rated insulation voltage Ui （Pollution degree 3 ）：690V
Rated impulse withstand voltage Uimp：8 kV
Safety isolation between main and auxiliary circuits: Safety isolation between main and auxiliary circuits: ≥ 440V
Auxiliary circuit wire cross-sectional area
Screw terminals Connection screws: M3, 2 No. Phillips screwdriver
Tightening torque: 0.8 ... 1.2Nm
Conductor cross-sectional area: 1 or 2 core wires, solid wires 2 ×（ 0.5 ... 1.5 ）mm²， 2 ×（ 0.75 ... 2.5 ）mm² ； Pre-fabricated terminal fine stranded wires 2 ×（ 0.5 ... 1.5 ）mm²， 2 ×（ 0.75 ... 2.5 ）mm²； AWG guide wire, solid or stranded wire 2 ×（ 20 ... 16 ） AWG ，2 ×（ 18 ... 14 ） AWG
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