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QZB Series Marine Auto-transformer
Service conditions:
A height above sea-level not exceeding 1000m;
A temperature of ambient air not below -25℃ and above +45℃；
Relative air humidity: ordinary type ≤85℃, damp and hot type ≤95℃;
In medium without risk of explosion and with too insufficient air and electric insulation dust to corrode metal and damage insulation;
In environment without water vapor and equipped with rainproof device.
Structure:
The auto-transformer is type of three phase star connection and air cooled.
Transformer is of 60%, 80% rated voltage ratio tapping, and the obvious voltage percentage sign is existed at the tapping.
Technical data:
| Type | Power | Power of | Reference | Weight | Maximum starting |
| of transformer | control motor(KW) | value of | （kg） | time（S） | |
| (KW) | rated operational current（A） | ||||
| QZB-11 | 11 | 11 | 22 | 30 | |
| QZB-14 | 14 | 14 | 28 | 30 | |
| QZB-17 | 17 | 17 | 36 | 33 | |
| QZB-20 | 20 | 20 | 40 | 36 | |
| QZB-28 | 28 | 28 | 54 | 44 | |
| QZB-30 | 30 | 30 | 57 | 46 | |
| QZB-37 | 37 | 37 | 70 | 48 | |
| QZB-40 | 40 | 40 | 76 | 50 | |
| QZB-45 | 45 | 45 | 84 | 55 | |
| QZB-55 | 55 | 55 | 103 | 65 | 60 |
| QZB-75 | 75 | 75 | 140 | 85 | |
| QZB-90 | 90 | 90 | 164 | 110 | |
| QZB-115 | 115 | 115 | 207 | 120 | |
| QZB-135 | 135 | 135 | 248 | 145 | |
| QZB-190 | 190 | 190 | 331 | 170 | |
| QZB-225 | 225 | 225 | 404 | 210 | |
| QZB-260 | 260 | 260 | 459 | 220 | |
| QZB-315 | 300 | 300 | 540 | 250 |
Dimension:
QZB-11~55KW
| Type | Dimension | Install size | |||
| A | B | C | E | F | |
| QZB-11 | 270 | 200 | 240 | 200 | 100 |
| QZB-14 | 270 | 200 | 240 | 200 | 100 |
| QZB-17 | 270 | 200 | 250 | 200 | 110 |
| QZB-20 | 270 | 200 | 250 | 200 | 110 |
| QZB-28 | 290 | 200 | 250 | 200 | 115 |
| QZB-30 | 290 | 200 | 250 | 200 | 115 |
| QZB-40（37） | 290 | 250 | 250 | 200 | 135 |
| QZB-45 | 290 | 250 | 250 | 200 | 135 |
| QZB-55 | 340 | 275 | 270 | 200 | 150 |
| QZB-75 | 340 | 300 | 275 | 200 | 150 |
| QZB-90 | 340 | 300 | 330 | 250 | 150 |
| QZB-115 | 410 | 300 | 350 | 250 | 155 |
| QZB-135 | 410 | 300 | 350 | 250 | 160 |
| QZB-190 | 480 | 320 | 405 | 300 | 155 |
| QZB-225 | 480 | 340 | 420 | 300 | 155 |
| QZB-260 | 560 | 340 | 470 | 300 | 165 |
| QZB-315 | 580 | 360 | 520 | 300 | 165 |
The description/sizes may be different with goods, please check with us when order.
QZB Marine Auto-transformer
This reduced-voltage auto-transformer (hereinafter referred to as auto-transformer) series is used for voltage reduction starting of squirrel-cage motor with three phase current AC 50~60Hz.in addition as the power 11-11-315KW auto-transformer must be isolated completely from the system when the starting is finished.
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