Probable cause: large gaps between the striker and the cup.
Remedy: bend the striker.
Now try to say what devices are meant here.
34 5
Fill up the certificate and test results. Translate the whole piece.
Certificate of Three-Phase Squirrel-Cage Induction Motor
Type______
Serial No__________
Technical Data
Output______—------------—kAV
Rotation right-hand, left-hand.
Terminal box if seen from the side of the driven mechanism is disposed at the right side (left side).
Results of Routine Tests
Major insulance._________
Stator winding resistance at 20°C________________________
5 Заказ Л? 864
Starting current multiple
Test Results in Normal Operation
Test Results in Normal Operation
| __Duty During_Hours |
|---|
| Voltage,V | Current,A | Output,kW | Eff.,% | s*Сn Cu | Excessive temperature rise, °C |
| of stator winding | of bearing front rear |
| | | | | | |
Electric strength of turn insulation has been checked at voltage of 286 and 494 V during 5 ms.
Major insulation has been checked at 2,000 V during 1 min and proved to be fit.
The motor has been checked at an increased number of revolutions__rprn during 30 min.
Additional Data
Weight of wire_____ kg
Number of sections per phase____________
Number of turns per section_____
Number of slots per pole and phase___________
Slot pitch________
Connection of stator winding — in series, two parallel branches. Designed winding resistance of stator at 20°C-------
Motor overall dimensions, mm:
LengthXwidthXheight__
Height of the shaft centre, mm_
Weight, kg______
Sealing
GOST_ Size, mm_
| Antifriction Bearings |
|---|
| GOST | Adopted symbol | Quantity, pc |
| | |
| For bearings use lubricant of grade |
Air Gap
| As per drawing, mm |
|---|
| rated | | minimum | | maximum | |
| | | | | |
| Number of motor operation hours on the Manufacturers’ testing bench — |
| Record of Inspection and Repairs |
|---|
| Date | Cause | Flaw detected | Description of parts to be repaired or replaced | Job performed | Note of performed jobs (place, date) | Document | Signature |
| | | | | | | |
36 30
Home exercise. Find in the text below the English equivalents for the following Russian word-combinations. Write a summary in English.
Законченное комплектное устройство (1), нулевая защита (1), сложное коммутационное устройство (3), открытая палуба (5), крышкой вверх (6), двухпостовое управление (7), высокопроизводительные механизмы (10).
1. The power cam controllers are self-contained unitized devices which, apart from the cam assemblies, have provisions for no-voltage protection, overload protection and, sometimes, one or two contactors and a relay.
2. The power cam controllers are widely used for controlling a-c motors of deck machinery.
3. Simple construction, reliable operation and small dimensions of this intricate switching device make it possible for electric drives which do not have to meet stringent requirements as to wear resistance.
4. Electric drives used for marine services are controlled by means of series power controllers which are available in two sizes.
5. The power cam controllers of the KB series have watertight construction as per class IP 56 and are designed for installation on weather decks.
6. The power cam controllers are designed for vertical mounting on weather decks or on the machinery. If no contactors are mounted in controllers the latter can be arranged in a horizontal position with the cover upward.
7. The use of the power cam controllers in the electric drives of the deck machinery is restricted to motor ratings of 20 to 25 kW. The factors which impose such restrictions are the operating frequency exceeding 300 operating cycles per hour and the requirements for remote or two-stationed control.
8. For anchor-handling, mooring and similar equipment with rating of up to 20 kW the power cam controllers are the preferred type of controllers.
9. The choice of the power cam controllers for cargo hoisting gear must take into account the required wear resistance of the controller.
10. For devices with a small number of startings and irregular operation controllers may be selected with regard to the starting and rated currents. For highly efficient gear with a number of startings per hour greater than 150 the value of the allowable starting and rated currents must be decreased to 1 or 2 times, so that the v'ear resistance should increase 2.5 or'4 times, respectively.
