QZB series autotransformerDetailed product description：

The QZB series autotransformer is suitable for three-phase squirrel cage induction motors with AC 50Hz, rated voltage of 380v, and rated output capacity of 300kw and below. It is used for voltage reduction starting under infrequent operating conditions, utilizing the characteristics of transformer voltage reduction to reduce the starting current of the motor and improve the impact on the transmission network during motor starting.
Transformers shall be designed, manufactured, and inspected in accordance with GB14048.4 and relevant standards.

QZB-22KW QZB-30KW QZB-40KW QZB-55KW QZB-75KW QZB-100KW QZB-115KW QZB-135KW QZB-155KW QZB-160KW QZB-190KW QZB-225KW QZB-260KW ZB-280KW QZB-315KW QZB-350KW QZB-400KW

1、 Scope of application
The QZB series autotransformer is suitable for infrequent voltage reduction starting of three-phase squirrel cage induction motors with AC 50Hz, rated voltage 380V, and power ranging from 14KW to 300KW, in order to improve the impact of motor starting on the transmission network.

2、 Model and its meaning


3、 Appearance and installation dimensions



4、 Main technical parameters of QZB series autotransformer

model	Control electric Machine power （Kw）	The longest job Time (S)	Most at work Current (A)
QZB	fourteen	thirty	twenty-eight
QZB-20	twenty	thirty	forty
QZB-28	twenty-eight	thirty	fifty-six
QZB-30	thirty	thirty	fifty-nine
QZB-40	forty	thirty	eighty
QZB-55	fifty-five	thirty	one hundred and ten
QZB-75	seventy-five	thirty	one hundred and forty-two
QZB-115	one hundred and fifteen	fifty	two hundred and thirty
QZB-135	one hundred and thirty-five	fifty	two hundred and seventy
QZB-190	seventy	seventy	three hundred and seventy
QZB-225	seventy	seventy	four hundred and ten
QZB-260	seventy	seventy	four hundred and seventy-five
QZB-300	seventy	seventy	five hundred and thirty-five

model	installation dimensions		mounting hole	Overall dimensions
	A	C	K*J	B	D	E
QZB-14	two hundred and thirty	one hundred and fifteen	12*20	two hundred and eighty	one hundred and forty-four	two hundred and twenty-six
QZB-17	two hundred and thirty	one hundred and fifteen	12*20	two hundred and eighty	one hundred and forty-four	two hundred and twenty-six
QZB-20	two hundred and seventy-two	one hundred and five	8*20	two hundred and seventy-nine	one hundred and thirty-eight	two hundred and twenty-nine
QZB-22	two hundred and seventy-two	one hundred and five	8*20	two hundred and seventy-nine	one hundred and thirty-eight	two hundred and twenty-nine
QZB-28	two hundred and eighty-four	one hundred and thirteen	9*20	three hundred and twenty-one	one hundred and fifty-three	two hundred and sixty-one
QZB-30	two hundred and eighty-four	one hundred and thirteen	9*20	three hundred and twenty-one	one hundred and fifty-three	two hundred and sixty-one
QZB-40	two hundred and seventy	one hundred and twenty-eight	12*40	three hundred and seventy-one	one hundred and sixty-eight	two hundred and eighty-two
QZB-45	two hundred and seventy	one hundred and twenty-eight	10*48	three hundred and seventy-one	one hundred and sixty-eight	two hundred and eighty-two
QZB-55	two hundred and forty-eight	one hundred and thirty-two	φ14	three hundred and fifty-two	one hundred and sixty-three	two hundred and eighty
QZB-75	two hundred and forty-six	one hundred and twenty-five	φ14	three hundred and seventy-one	one hundred and sixty-four	two hundred and ninety-five
QZB-115	three hundred and twelve	one hundred and sixty-one	12*18	three hundred and ninety-two	two hundred and three	three hundred and fifteen
QZB-135	three hundred and ten	one hundred and sixty-eight	12*18	three hundred and ninety-one	two hundred and seven	three hundred and forty-two

QZB series autotransformer