厂家供应精准固定功率电阻箱

技术参数：

功 率：4KW~50KW

使用电压：DC或AC（三相或两相可根据客户要求定制）

绝缘电压：≥3KV

表面温度：≤70℃

防护等级：IP54

适用范围：该类电阻箱广范用于制动电路及吸收电路

尺 寸：可以根据客户要求设计或根据我司现有尺寸

特点： 该电阻体积小，功率大，散热好，外加防护罩，能在室

外较恶劣环境下是使用●表面温升

Surface temperature rise (chassis installation)●额定功率递减图

Ambient temperature and power derating cure

●电气、机械特性Electrical and mechanical characteristics

特性

Characteristics规格值

Standards试验方法

Test methods阻值误差

Resistance tolerance±1%(F)±2%(G)±5%(J)±10%(K)阻值测试仪测量

Testing by the resistance testing instrument温度特性

Temperature coefficient300ppm/℃常温Room temperature+100℃短时间过负荷

Short-time loadΔR≤1%U=，5秒seconds

绝缘阻值

Insulation resistance1000MΩ，min接线柱与支架壳之间的电阻值

The resistance between the terminals and the bracket耐电压

Dielectric withstanding voltage无机械损伤及无绝缘层破损

no evidence of mechanical damage or insulation breakdown

ΔR≤0.2%接线柱与支架壳之间60秒承受的电压值The 60 seconds Max. insulation voltage between the terminals and the bracket振动

Vibration无机械损伤

no evidence of mechanical damage

ΔR≤0.2%XY方向各2小时2hours each

频率frequency 10~55Hz

振幅amplitude 1.5mm可焊性

Solderability焊锡面积覆盖率85%以上

The soldering area is over 85%245℃3秒seconds

●耐候特性Environmental charactaristics

特性

Characteristics规格值

Standards试验方法

Test methods耐热性

Heat resistance无机械损伤

no evidence of mechanical damage

ΔR≤0.5%200℃2小时hours耐湿性

Humidity无机械损伤

no evidence of mechanical damage

ΔR≤0.5%40℃95%RH

500小时hours耐湿负荷寿命

Load life in humidity无机械损伤

no evidence of mechanical damage

ΔR≤0.5%40℃95%RH

U=0.1，90分钟minutes ON, 30分钟minutes OFF, 500小时hours负荷寿命

Load lifeΔR≤3%U=，90分钟minutes ON, 30分钟minutes OFF, 1000小时hours不燃性（过负荷）

Flame retardant不燃烧

no evidence of flaming or arcing1~6倍的额定功率

1~6times rated power load