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QZB-J Series Three Phase Starting Auto Transformer

350kVA Three Phase Auto Voltage Reducing Starter Transformer (Model: QZB-J-350)

350kVA Three Phase Auto Voltage Reducing Starter Transformer (Model: QZB-J-350)

Primary Voltage: 400V or Customized
Starting Voltage Taps: 80% and 60% or Customized
Protection: Thermally Protected
Material of Winding: Copper or Aluminum as Per Customer′s Request
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QZB-J Series Three Phase Auto Voltage Reducing Starter Transformer

Application

QZB-J Series Auto Voltage Reducing Starter Transformer is applicable to a line of AC 50Hz/60Hz, rated voltage is 380V (660V or 220V products can be made to order). It can used to infrequent start and reduce voltage for 3 phase induction motor with rated output power 500kW or under. Because transformer can reduce voltage, motor starting current is decreased so that it can reduce the impact to electricity grid when motor starting.

QZB-J series product is QZB product improvement. Compared with QZB, QZB-J product has several features as following:
1.1 Add an imported temperature protected switch (thermal sensitive breaking switch) in the coil inner
1.2 Model QZB-J-14~75 is changed from both side connecting wire to one side connecting wire. it makes connecting wire more convenient and more firm
1.3 Other performance and usage method is similar as QZB product.

Structure characteristics

This series of transformer has 65%(60%), 80% of two groups of starting voltage taps, if the need for starting torque smaller when the optional 65%(60%) taps, large torque can choose 80% tap.The transformer can be equipped with XJZ1, JJ1 series auto transformer starter box(cabinet) as the main accessories.

Overall dimension and installation dimension diagram

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When rated operating voltage is 380V

Model	Outline size (mm)			Hole distance for installation (mm)		Installation hole K or KxJ (mm)
Model	Bmax	Dmax	Emax	A±5	C±5	Installation hole K or KxJ (mm)
QZB-J-14	340	190	280	220	100	10×20
QZB-J-20	340	190	280	220	100	10×20
QZB-J-22	340	190	280	220	100	10×20
QZB-J-28	340	210	280	220	120	10×20
QZB-J-30	340	210	280	220	120	10×20
QZB-J-40	350	220	325	220	110	10×20
QZB-J-45	350	220	325	220	110	10×20
QZB-J-55	350	230	325	220	125	10×20
QZB-J-75	430	235	335	220	130	10×20
QZB-J-100	435	315	375	310	150	12.5×25
QZB-J-115	435	315	375	310	150	12.5×25
QZB-J-135	470	320	400	310	145	Φ15
QZB-J-155	470	320	400	310	145	Φ15
QZB-J-160	470	320	400	310	145	Φ15
QZB-J-190	520	320	420	310	155	Φ15
QZB-J-225	590	340	425	310	160	Φ15
QZB-J-260	590	320	465	310	155	Φ15
QZB-J-300	590	340	495	310	170	Φ15
QZB-J-320	590	340	495	310	170	Φ15
QZB-J-350	610	340	535	310	175	Φ15
QZB-J-400	610	340	535	310	175	Φ15
QZB-J-450	680	340	660	420	190	Φ15
QZB-J-500	680	340	660	420	190	Φ15

When rated operating voltage is 660V

Model	Outline size (mm)			Hole distance for installation (mm)		Installation hole K or KxJ (mm)
Model	Bmax	Dmax	Emax	A±5	C±5	Installation hole K or KxJ (mm)
QZB-J-14	340	190	280	220	100	10×20
QZB-J-22	340	190	280	220	100	10×20
QZB-J-30	350	210	280	220	120	10×20
QZB-J-40	430	220	325	220	110	10×20
QZB-J-45	430	220	325	220	110	10×20
QZB-J-55	430	230	325	220	125	10×20
QZB-J-75	430	240	335	220	130	10×20
QZB-J-100	460	315	380	310	150	12.5×25
QZB-J-115	460	315	380	310	150	12.5×25
QZB-J-135	470	315	400	310	145	Φ15
QZB-J-155	470	315	400	310	145	Φ15
QZB-J-160	470	315	400	310	145	Φ15
QZB-J-190	520	320	420	310	155	Φ15
QZB-J-225	550	330	425	310	160	Φ15
QZB-J-260	590	320	495	310	155	Φ15
QZB-J-300	560	330	495	310	170	Φ15

Main Technical Parameter

When Rated operating voltage is 380V

Model	Control motor power (kW)	Rated operating current (A)	The most starting time(s)
QZB-J-14	14	28	40
QZB-J-20	20	24
QZB-J-22	22	42
QZB-J-28	28	56
QZB-J-30	30	57
QZB-J-40	40	80	60
QZB-J-45	45	84
QZB-J-55	55	103
QZB-J-75	75	140
QZB-J-100	100	200	80
QZB-J-115	115	230	80
QZB-J-135	135	270	100
QZB-J-155	155	294
QZB-J-160	160	300
QZB-J-190	190	370
QZB-J-225	225	410
QZB-J-260	260	475
QZB-J-300	300	535
QZB-J-320	320	588
QZB-J-350	350	643
QZB-J-400	400	735
QZB-J-450	450	826
QZB-J-500	500	918

When Rated operating voltage is 660V

Model	Control motor power (kW)	Rated operating current (A)	The most starting time(s)
QZB-J-14	14	16	40
QZB-J-22	22	24
QZB-J-30	30	33
QZB-J-40	40	46	60
QZB-J-45	45	48
QZB-J-55	55	59
QZB-J-75	75	81
QZB-J-100	100	115	80
QZB-J-115	115	133	80
QZB-J-135	135	156	100
QZB-J-155	155	170
QZB-J-160	160	173
QZB-J-190	190	213
QZB-J-225	225	237
QZB-J-260	260	274
QZB-J-300	300	309