Terms and Abbreviations

1. A – Ampere – unit of measure for electrical current - (schematic abbreviations) 2. A1 - Schematic abbreviation - Axis Box 1 - (schematic abbreviations) 3. A2 - Schematic abbreviation - Axis Box 2 - (schematic abbreviations) 4. A3 - Schematic abbreviation - Axis Box 3 - (schematic abbreviations) 5. AI - Analog Input 6. Analog signal - A signal that attains an infinite number of different amplitude levels. 7. AO - Analog Output 8. Apparent Power - The power value obtained by multiplying the current by the

voltage (P = I X E). 9. Axial dimension - This term is used for the measurement of the coupler distance

during the generator coupler alignment procedure. 10. CB - Circuit breaker - provides power to individual circuits – also circuit protection. 11. Contactor – Is a signal actuated switch used for supplying of higher three phase

voltages, usually a motor, heater etc… 12. CT - Current Transformer – used by measuring circuits in the main controller and

SEG converter. 13. DE – Drive end 14. DI - Digital Input, high or low state (with the Bachmann system - 0 or 24Vdc) 15. Digital signal - A signal having an integral number of discrete levels or values. (1’s

and 0’s) (24Vdc or 0Vdc). 16. DO - Digital Output – Bachmann M1 system uses outputs of 0 or 24Vdc 17. E - Voltage in Volts – U is voltage on 1.5 Schematics 18. EOC – Electrical to Optical Converter- used for converting electrical signals to light

signals 19. E-Stop - Emergency stop 20. Feedback signal – signal sent back to the processor indicating the status of a

component (usually 0 or 24Vdc . 21. GE – Schematic abbreviation – Generator 22. Grid voltage – See Utility 23. GT – Schematic abbreviation - Gearbox 24. I - Current in Amperes – L is current on 1.5 Schematics 25. Inductive sensor/proximity switch - Senses changes in the magnetic inductance,

outputs pulses 26. K – kilo = 1000 27. LS – Schematic abbreviation - Control Cabinet (Hub) 28. LVMD - Low Voltage Main Distribution (ABB Cabinet) 29. mA - mili amp – unit of measure for electrical current

30. MFR 2U1 - Multifunction relay Mains Supervision/fault relay/current measuring. 31. Motherboard – (backplane) The interface between circuit boards or control

modules. 32. Motor protection /thermal overload – operates with heat, contacts open at a

desired current setting – used for motor and circuit protection 33. Nacelle – is the whole WTG as a unit with enclosures. 34. Nacelle Bottom – bottom enclosure 35. Nacelle Top – top enclosure 36. NC - Normally Closed – indicates the status of a relay or switch contact 37. NDE – Non-Drive End 38. NO - Normally open – indicates the status of a relay or switch contact 39. NS – Schematic abbreviation - Low Voltage Main Distribution Cabinet 40. PF- Power Factor 41. Ph - Phase 42. PLC - Program Logic Control 43. Power factor - In an alternating current circuit, the ratio of true power to apparent

power – it is equal to the cosine of the phase angle, expressed in either decimal or percentage

44. Primary - The input winding of a transformer 45. Program Logic Controller (PLC) – Control system that is programmable. 46. Proximity Switch – Inductive Sensor used for counting Yaw position, Rotor rpm,

and Generator rpm. 47. PT 100 - Resistive thermometer, sensor (100 Ohms at 0ºC) – used for Temperature

Supervision 48. Reactive Current – the component of alternating current that is not in phase with

the voltage 49. Reactive Power - is the product of kilovolts and amperes in a reactive component of

a circuit. 50. Relay – A signal actuated switching device. 51. rpm - Revolutions Per Minute 52. Secondary - The output winding of a transformer 53. SR – Schematic abbreviation – Slip ring 54. SS – Schematic abbreviation - Main Controller Cabinet 55. SUB – Service Update Bulletin - 56. Synchronization - The coincidence of one process or operation to another. 57. TB – Schematic abbreviation - Top Box or Terminal Block 58. Thermal Overload - Motor protection – provides adjustable circuit and motor

protection, manual re-settable.

59. Transformer - A device using electromagnetic induction to transfer electrical energy from one circuit to another.

60. True Power – in an ac circuit, the power actually dissipated in the resistive component, the reactive component consumes no power

61. Turns ratio - The ratio of the number of turns in the primary to the number of turns in the secondary

62. ua - micro amp 63. UPS – Un-interruptable Power supply provides power after grid loss, used for

supplying power to various circuits in case of grid loss. Indicated as USV in 1.5 schematics.

64. Utility – power supplied from the local utility company 65. VisuPro – is the program that allows communication between Bachmann control

system and the turbine PC for viewing/recording data and turbine control (SCADA) 66. WTG – Wind Turbine Generator 67. YC Coil – Closing Coil for the Main Switch (CB1) 68. YU Coil – Under voltage or low voltage coil for the Main Switch (CB1)

Figure 3

Reading Schematics

Figure 4

Sheet 0Section

Section Designation

Current Revision 1.02

Date of drawing Latest Revision or current

revision and date of revision

Sheets affected

Description of change

Section Designation

Map Scale

Map Scale Component Map Location A2

Component Map Location C2

Section in Schematics

This wire maps to the LVMD (NS) section, Sheet 4, map location 3E

Terminal Block X5

Pin Number

Maps to sheet 4 of the same section (main cabinet) map location 1A

Voltage this wire is supplying

Wire designation

Sheet Number

SS identifier for Main Control Cabinet

Component Identification

Component Identification

Fig. 5

Reading Schematics

Digital output 24Vdc energizes relay 18K6

Map location number

Relay 18K6 energizing coil

Light emitting diode

Relay description

Relay contact configuration

Sheet 18

Section Designation (SS)

Sheet 7 map location 3B

Module 18A1

Supply line continues on to sheet 19-map location 1A

Supply line

Comes from sheet 13 map location 8A

Digital output supply

A2 is the negative terminal of the energizing coil

A1 is the positive terminal of the energizing coil

Fig. 6

Reading Schematics

Power Distribution Transformer

Circuit Breaker

Thermostat

Terminal Block 2

Pin numbers of terminal block 2

Mapped position from sheet 3 of main controller (SS)

Thermostat

Fan motor

Fuses

Switch

A dot indicates connecting lines

Fig. 7

Reading Schematics

Uninterruptable power supply line

Power supply 120 to 24

Terminal block X25

Maps to slipring section sheet 1 location 3C

Contact

Terminal block X20

Terminal block pin 5 Top Box section

designation (TB)

Contact 23/24 of relay 12K2 Contact 23/24

X20 pin 6

Contact 33/34

Dotted box indicates external switch

Fig. 8

Reading Schematics

Uninterruptable power supply line

Power supply 120 to 24

Terminal block X25

Maps to slipring section sheet 1 location 3C

Contact

Terminal block X20

Terminal block pin 5 Top Box section

designation (TB)

Contact 23/24 of relay 12K2 Contact 23/24

X20 pin 6

Contact 33/34

Dotted box indicates external switch

Fig. 8

Reading Schematics

Reading Schematics

Figure 10

24V power supply

Feedback - In series with other Overvoltage protection circuits

Part of motor protection circuit

Contact 13/14 of relay 12K2

Solenoid Valve Relays

Component label number

Reading Schematics

Figure 11

Digital output 11.19

Relay 26K2

Contact 33/34 of 12K2

Digital output Description

Reading Schematics

Figure 12

Analog Inputs

26A1 26A2

Isolation Amplifier

Terminal Block in SEG Converter

Reading Schematics

Figure 13

PT 100

Terminal Block

X17 X17 X17

Reading Schematics

Figure 14

Filter Switch PT 100 Temperature Sensors

Motor Protection Circuit

Overspeed Guard

Resistor

Capacitor

To Main Cabinet

To Gearbox

Inductive Sensor

Relay Contact

Switch Contact

Relay Energizing Coil

Internal Relays

Fig. 15

Reading Schematics

Circuit Breaker Feedback Contacts

Digital Inputs

Digital Input Descriptions

Contact Configurations

Relay Description

Fig. 16

Reading Schematics

Power Supply 120Vac to 24Vdc

Overvoltage Protection

Switch Contacts

Map Location

Ground Reference

Contact Configuration

24Vdc Supply Line

Power from Uninterruptable Power Supply

Fig. 17

Reading Schematics

Fig. 18

Reading Schematics

Generator Position Encoder Mounted to Rear of Generator

Terminal Block in SEG Converter

16A1 Counter Module

Inductive Sensor Generator RPM

RC Time Constant

Reading Schematics

Fig. 19

Thermal Overload

MFR 13 (Multifunction Relay) Grid Monitoring

0-20mA Outputs

CT Inputs

Fault Relays

Mains Voltage

Test Terminal block for isolating a single phase from the MFR

Non Can Bus

To Analog Inputs

Fig. 20

Reading Schematics

Fig. 20A

Reading Schematics

CanBuss Connections

CanBuss Communications

Fig. 20B

Reading Schematics

Thermistor Switches

Feedback to 17A1 DI 11.3 Yaw Motor Temperature PTC

Temperature Sensor

Fig. 21

Reading Schematics

Power Supply 120Vac to 24Vdc

Controls Yaw

Used for Wind Speed and Automatic Tracking of Wind

Supply voltage

Supply voltage

UNIOP interface on Top Box door

To brush wear switches in slip ring compartment of generator

Fig. 22

Reading Schematics

Inductive Sensors (proximity switch) Counts Yaw Position

Fig. 23

Reading Schematics

Feedback Signals

Uninterruptable Power Supply (UPS) or (USV)

UPS

Switch

120Vac Power Receptacles

120Vac Supply Line

Uninterruptable Power Supply Line

Fig. 24

Reading Schematics