Tiger Tiger Tiger
LRR

ZYQT SERIES Liquid Resistor Starter And Speed Regulator

Application scope

It is used from the soft start, speed regulation and energy-saving operation of slip ring motors with rated voltage of 415v ~15kv

Main technical parameters

initial starting current:1st≤1.3in (A)
speed regulation rates:
2:1 for air blower fan and pump
recommendable range:60%~90% Nn
characteristics of impulse suppressing
slip S≤0.12 for rolling machine, based on its working conditions
Eenergy saving rates:≥30%(average value) for air blower fan and pump
Normal working temperature of variable liquid resistor:0~70oC
Protection level:IP20, IP30

Working principles

As for motors with loads such as air blower fans or pumps, speed regulation and energy saving can be achieved by changing resistance value of the variable liquid resistor that is connected in series to the rotor circuit of motor: the less resistance, the faster spee; the motor reaches its full speed when the resistance value reaches zero.

A heat circulation system is devised to circulate the liquid so as to prevent the temperature of the liquid from excessive rise. A central contral unit can be adopted to realize remote monitoring and operation. It features its convenient control panels, convenient operations and high reliability.

Standard adopted

GB/T14048.1-2000
IEC60947-1: 1999
GB7251.1-1997
IEC439-1: 1992
Q/FZR1-2003

 

Advantages

Further, we wish to highlight below following few advantages of our offered product ZYQT Liquid Resistance Regulator (LRR) over GRR`s :-
1.Totally stepless start & further stepless speed regulation is possible in our ZYQT; unlike GRR, which has 20 steps.
2.No risk of burning out of the power componets as liquid is adopted for our ZYQT instead of silicon graded cast iron for GRR.
3.Maintenance free operation & much longer life than GRR. Electrode and liquid of our ZYQT does not need maintenance for more than 7-8 years (In fact, customers have used them for almost 15 years)
4.More continual start attempts than GRR - our ZYQT can offer more than 6 consecutive starts.

introduction to ZYQT series     Click To View »
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