9.11.1 Wires and cables
The type of locomotive main circuit electric power cables is Grade 750V DCJ with low smoke, no bittern and high fire resistance.
Thin cables with light weight, fire resistance, low smoke, no bittern and good safe performance are used as locomotive control cables
9.11.2 Power so cket
The sides of car body are equipped with battery charging socket and exterior power socket.
9.11.3 Layout of co ntrol equi pment
Locomotive control equipment consists of driver’s desk and electric apparatus control cabinet.
9.11.4 Driver’s desk
The driver’s desk is located inside the operator cab. In front of the driver’s desk are computer LCD and instruments etc. On the desk are master control and switch group. Through these apparatus the driver can control diesel engine starting, locomotive starting, running and stop. General changeover switch and micro-breaker are installed on the door of the driver’s desk.
1-phoenix terminal;2-left door groupware;3-door lock;4-electric heater;5-foot switch;6-general changeover switch(1SA);7- general changeover switch(18SA);8- general changeover switch(3SA);9- general changeover switch(6SA);10- general changeover switch(15SA);11-
general changeover switch(9SA1-2);12-electric instrument
module;13-consist telephone;14-LCS32-displayer;15-wind instrument module;16- ashtray;17-fore four toggle switch groupware;18-master controller;19-button(stop);20-button(shunting);21-button(1SB2);22-button
(1SB1);23-button(1SB3);24-button(1SB4);25-twelve toggle switch
9.11.5 Electric apparatus c ontr ol c abinet
The electric apparatus control cabinet is in electrical cab.
Main apparatus include main contactor, reverse changeover switch, working condition changeover switch etc. Low voltage apparatus mainly consist of diesel engine starting contactor, air compressor motor contactor, exciter contactor and control apparatus, intermediate relay and general changeover switch etc.
The electric apparatus in the electrical cabinet completes all the control orders that the driver sends.
9.11.6 Circuit control and protection
Locomotive circuit is mainly composed of circuit power control, operating circuit control and protecting circuit.
9.11.7 Circ uit p ower con tro l
DC starting generator feeds the power circuit, and when the DC starting generator is off, it is fed by battery.
9.11.8 Locomoti ve operating circui t control
Locomotive operating circuit includes diesel starting, speed governing shut down and locomotive starting, speed governing etc.
9.11.8.1 Diesel engine starti ng
Press the “diesel engine starting” button to start the diesel engine. 9.11.8.2 Diesel speed gov erni ng
The master controller includes direction changing handle and main handle. The change direction handle has 3 positions: forward, backward, 0. The main handle has 16 notches from 0 to16. Only when the main handle is on “0” notch, you can change the position of the direction changing handle, and only when the direction changing handle is on “0” position, you can turn main handle away from “0” notch.
This interlock makes sure the operation of locomotive is completed safely and reasonably.
9.11.8.3 Diesel s hutdow n
A button will be fixed on the driver’s desk. Press the diesel engine stop button can shut down the diesel engine.
9.11.8.4 Locomo tiv e starti ng ci rcu it
Turn the direction-changing handle on the master controller to “forward” or “back” position to prepare for the locomotive starting.
Push the main handle from “0” notch to “1” notch, and the direction changing switch starts to work. Through all
the electric apparatus
interlock control, the
excitation circuit of the
locomotive exciter, main
circuit and main alternator excite circuit can be turned on, and main alternator provides power to traction motor to start running of the locomotive.
9.11.8.5 Locomo tiv e speed gov erning c irc uit
By pushing the main control handle of the master controller to a higher notch, the output power and the speed of diesel will increase, and then the speed of locomotive will increase accordingly.
9.11.8.6 Locomot ive prot ective circ uit
The locomotive protection circuit includes oil pressure protection, water temperature protection, crankcase pressure protection, diesel over-speed
diesel oil over-temperature protection and so on.
9.11.8.7 Oil pressur e pro tectio n
In order to ensure the correct lubrication of the diesel engine, it’s required that a certain pressure should be kept to the lubricating oil system, and the oil pressure should change when the load of diesel engine changes. If the oil pressure is lower than the stated value, the diesel engine should be shut down. There are two protection methods for the oil pressure of the diesel engine: oil pressure relay control circuit and microcomputer control circuit. Alarming signal shall be displayed on the LCD screen of the computer.
The oil pressure protection of the diesel engine by computer control can be canceled or modified by software or hardware.
9.11.8.8 Earthing protection
The earthing protection circuit is composed of inspection circuit, earthing switch and failure switch.
When the current of over-current relay loop surpasses the stated value, the earthing relay start working and the diesel engine is unloaded. Earthing failure has two alarming modes: earthing signal lamp and computer LCD display.
9.11.8.9 Over-current pro tectio n
Over-current protections include main alternator over-current protection, traction motor over-current protection, main alternator excites over-current protection and traction motor excites over-current protection.
9.11.8.10 Alt ernator over-curr ent pr otecti on
The circuit consists of current reactor, three phase bridge rectifier circuit and over-current relay.
alarming modes: over-current signal lamp and computer LCD display.
9.11.8.11 Tractio n mo tor over-current pr otecti on
When the locomotive is put into service, if the current of one traction motor reaches the stated value, the traction power will be limited to 0, the computer LCD display “traction motor over-current” and the computer alarming lamp lights.
9.11.8.12 Alt ernator exci tation o ver-current pro tectio n
When the locomotive is put into service, if alternator excitation current is over a stated value, the computer LCD display “ alternator excitation over-current” and the computer alarming lamplights.
9.11.8.13 Over-voltage protection
9.11.8.13.1 Auxili ary p ower over-voltage pr otecti on
The locomotive starting generator has two modes of power generation: auxiliary power generation and fixed power generation. Auxiliary power sources voltage is adjusted by microcomputer. When the auxiliary power voltage is (125+5)V, the “auxiliary power over-voltage” lamp lights and the starting generator turns to fixed power generation.
9.11.8.13.2 Alternator over-voltage pro tectio n
When the locomotive is put into service, if main rectifier’s output voltage is over 1100V, the computer limits the power to zero and the computer LCD displays “main alternator over-voltage”.
9.11.8.14 Fire alarm sys tem
The locomotive equips with the fire alarm system.
9.11.8.15 Fault disp lay and dis posal strategy
9.11.9 Lighting
The locomotive lighting consists of the head lighting, the cab lighting, the car body inside lighting and the car bottom lighting. All of the lightings shall be controlled by the lighting switch fixed no the electric apparatus cabinet. When putting the lighting switch on the position of “battery”, the power for lighting is supplied by the battery before the diesel engine starts running; after the diesel engine starts, the lighting circuit’s electricity shall be supplied by DC starting generator; when
putting the lighting switch on the position of “external power source”, the
lighting circuit is connected with the external power source outside of locomotive through locomotive power socket.
The marker lights (signal lamp) will be designed according to UIC534 standard.
9.11.9.1 Head li ght ing
The locomotive head lighting consists of headlight and mark lights.
The headlamp adopts halogen tungsten lamp with power 800W, does not need trigger and can be started directly; the mark lights consists of electro optics light with power 200W and incandescent lamp.
9.11.9.2 Driver’s cab li ghti ng
The driver’s cab lighting consists of the top cab lamp, and the operating console lamp. The top cab light is composed of a group of mixed bulbs, and the operating console lamp adopts incandescent light.
9.11.9.3 Car b ody ins ide li ght ing
The car body inside lighting includes the lightings for electrical apparatus room, auxiliary room, air compressor room, and the scanty lamps are adopted for the lighting.
9.11.9.4 Ligh tin g u nder t he und er-frame
The lighting under the under-frame adopts incandescent lamps, mainly used for lighting when checking equipment under the car body.