Marine motor,ship motor

1. Introduction

Y-H Series are totally-enclosed, fan-cooled three-phase marine motors of the squirrel-cagetype. The motors are suitable for driving various machines on ships such as pumps, blowers, separators, hydraulic engines and other auxillary equipment.

Y-H series is a design variation of the brand-new Y series developed recently and noted for its high-efficiency and starting torque.

The motors are designed accordance with National Standard GB755 ” Rotating electrical machines Rating and performance ” and the existing “ Rules for the construction of sea-going steel ships.”

The motors also comply with the relevant requirements of the following standards and specifications.

IEC60034   Rotating electrical machines

IEC60068   Basic environmental testine procedures

IEC60072   Dimensions and output ratings for rotating electrical machines

IEC60092   Electrical installation in ships

The motors are also in conformity with part of the specifications of the following Ships Classification Societies.

LR: Lloyd’s Register of Shipping; GL: Germanischer Lloyd; NK: Nippon Kaiji Kyokai

2.  Construction

(1). Protection IP44

(2). Frame,end shield and bearing cap

All made of Grey cast iron HT200 (GB/T9437) and the outer surface of the frame is provided with longitudinal cooling ribs to increase cooling effects.

(3) .Shaft extension

Standard motors have a cylindrical shaft extension. Motors of B3 and B35 type with two shaft extensions are afforded on request, but the second shaft extension can only transmit rate output with direct coupling.The shaft is made of high grade steel No 45(GB/T699).

(4) .Terminal Box

The terminal box is arrangde at the right hand side when looking at the driving end. If the terminal box is to be arranged at the left-hand side. This fact must be specifically stated when placing the order.

Six terminal studs are provided in the terminal box and a connecting diagram is shown on the back of the cover. Terminal markings used are in full conformity with IEC publication 60034-8. Clearance between two neighboring conducting parts is made not less than 8mm and all creepages not less than 12mm.

An extra terminal is provided inside the box for grounding purpose.

(5) .Bearing: The type and size of bearings used in these motors are given in table 11.

3. Type Designation: The type designation consists of several letters and digits.

4.  Operating Conditions

Temperature of the coolant:  not exceeding 45 ºC; Altitude:  0m; Relative humidity:  =<95%

Dew; Salt mist; Oil mist; Fungus;  Shock;  Vibration: exists; Inclination:  +-15º; Swing:  +-22.5º

5. Insulation, Temperature Rise

Insulation:  B or F

Temp. Rise of winding (resistance method):   75K or 100K

Permissible working temp.of bearing (thermometer method):  90 ºC

6. Type of starting: Direct on full-voltage starting for all sizes; reduced voltage starting starting allowable at no-load or light load.

7. Driving Method: Pulley, spur of flexible coupling can be used for driving.

8. Voltage and Frequency: Rated Voltage:  380V or 440V; Rated Frequency:  50Hz or 60Hz

9. Connection: 3 KW or Less:  Y; More than 3KW:  Δ

10. Noise: The noise limits (Lw) of the motors measured at the no-load conditions are given in Table 1.

11. Duty Type: Continuous(S1)

12. Vibration: The effective values of vibration intensity bound, measured at no-load conditions, does not exceed those given in table2.

Table 1  (Noise Value)

Table 2  (VibrationValue)

13.  Mouting Arrangements

Mounting arrangements available or various frame sizes are shown in table 3.

B3:   Horizontal, foot-mounted; B5:  Horizontal, flange-mounted

B35:  Horizontal, foot and flange mounted; V1:  Vertical, flange mounted

14.  Impregnation and Surface Treatment

The motor windings impregnated and well treated to obtain the adequate dampproof. Anti-fungus and anti-salt-mist properties in accordance with the specifications for humid-tropic machines.

15.  Technical Data: Techincal data for motors of different synchronous speed are given in table 4-7.

16.  Mounting and Overall Dimensions: Mounting and overall dimensions for motors of varlous mounting arrangements are shown respectively by table 8-10.

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