主要用于起重机设备中匹配YZR系列电动机的S3、S4、S6工作制的通用电阻器，它适用于交流50Hz电压至660V的电路中作为电动机的起动、调整及制动电阻。

 注：(1)带有外壳的代号为“X”，防护等级为IP23，适用于户外防雨及户内安全防护(不带外壳则无“X”的代号)。
       (2)电阻元件代号“B”—ZB1及ZB2康铜板形元件：“Y”铬铝圆形元件；“J”ZJ1铁铬铝齿形元件；“D”ZD1铁铬铝小波浪形元件。
       (3)电动机极数：“6”为6极；“8”为8极；“10”为10极。
       (4)通电持续率：TD25%为“2” ；TD40%为“4” ；TD60%为“6” 。
       (5)控制系统代号：“T”—凸轮控制器，无一相开路；“K”—凸轮控制器，有一相开路；“Q”—PQR10型、PQD6402型升降控制屏；“S”—PQS型升降控制屏；“Sf”—PQS型升降控制屏；“Y”—PQY型升降控制屏、PQD6401型平移控制屏，无一相开路；“L”—PQY型平移控制屏，有一相开路；“Z”—PQZ型抓斗控制屏。
注：功率、电流、电阻、电压可随客户需求订做。

RY52、RY54、RY56系列起动调整电阻器:
起动调整电阻器:
RY52-160M1-6/1B(YZR160M1-6)
RY52-160M2-6/2B(YZR160M2-6)
RY52-160L-6/2B(YZR160L-6)
RY52-180L-6/3(YZR180L-6)
RY52-200L-6/4(YZR200L-6)
RY52-225M1-6/4(YZR225M1-6)
RY52-225M-6/4(YZR225M-6)
RY52-225M2-6/6(YZR225M2-6)
RY52-280S-6/6(YZR280S-6)
RY52-280M-6/6(YZR280M-6)
RY52-160L-8/2B(YZR160L-8)
RY52-180L-8/2B(YZR180L-8)
RY52-200L-8/3(YZR200L-8)
RY52-225M1—8/4(YZR225M-8)
RY52-225M-8/4(YZR225M-8)
RY52-280M-8/7(YZR280M-8)
RY52-225M2-8/5(YZR225M2-8)
RY52-280S-8/5(YZR280S-8)
RY52-315S-8/8(YZR315S-8)
RY52-315M-8/10(YZR315M-8)
RY52系列RY52-280S-10/5(YZR280S-10)
RY52-280M-10/5(YZR280M-10)
RY52-315S-10/6(YZR315S-10)
RY52-315M-10/9(YZR315M-10)
RY54-160M1-6/2B(YZR160M1-6)
RY54-160M2-6/2B(YZR160M2-6)
RY54-160L-6/3B(YZR160L-6)
RY54-180L-6/4(YZR180L-6)
RY54-200L-6/4(YZR200L-6)
RY54-225M1-6/5(YZR225M1-6)
RY54-225M-6/5(YZR225M-6)
RY54-225M2-6/6(YZR225M2-6)
RY54-280S-6/8(YZR280S-6)
RY54-280M-6/9(YZR280M-6)
RY54-160L-8/2(YZR160L-8)
RY54-180L-8/3(YZR180L-8)
RY54-200L-8/3(YZR200L-8)
RY54-225M1—8/5(YZR225M-8)
RY54-225M-8/4(YZR225M-8)
RY54-280M-8/8(YZR280M-8)
RY54-225M2-8/6(YZR225M2-8)
RY54-280S-8/5(YZR280S-8)
RY54-315S-8/8(YZR315S-8)
RY54-315M-8/11(YZR315M-8)
RY54-280S-10/6(YZR280S-10)
RY54-280M-10/6(YZR280M-10)
RY54-315S-10/8(YZR315S-10)
RY54-315M-10/9(YZR315M-10)
RY56-160M1-6/2B(YZR160M1-6)
RY56-160M2-6/2B(YZR160M2-6)
RY56-160L-6/2(YZR160L-6)
RY56-180L-6/3(YZR180L-6)
RY56-200L-6/5(YZR200L-6)
RY56-225M1-6/6(YZR225M1-6)
RY56-225M-6/6(YZR225M-6)
RY56-225M2-6/7(YZR225M2-6)
RY56-280S-6/8(YZR280S-6)
RY56-280M-6/9(YZR280M-6)
RY56-160L-8/2B(YZR160L-8)
RY56-180L-8/3B(YZR180L-8)
RY56-200L-8/4(YZR200L-8)
RY56-225M1—8/6(YZR225M-8)
RY56-225M-8/4(YZR225M-8)
RY56-280M-8/9(YZR280M-8)
RY56-225M2-8/6(YZR225M2-8)
RY56-280S-8/6(YZR280S-8)
RY56-315S-8/10(YZR315S-8)
RY56-315M-8/12(YZR315M-8)
RY56-280S-10/6(YZR280S-10)
RY56-280M-10/6(YZR280M-10)
RY56-315S-10/9(YZR315S-10)
RY56-315M-10/10(YZR315M-10)