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QC/T 911-2023: PDF in English (QCT 911-2023)
QC/T 911-2023
QC
AUTOMOTIVE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.160
CCS T 59
Replacing QC/T 911-2013
Power Supply Vehicle
ISSUED ON: APRIL 21, 2023
IMPLEMENTED ON: NOVEMBER 1, 2023
Issued by: Ministry of Industry and Information Technology of the People’s
Republic of China
Table of Contents
Foreword ... 6
1 Scope ... 10
2 Normative References ... 10
3 Terms and Definitions ... 12
4 Technical Requirements ... 13
5 Test Methods ... 23
6 Inspection Rules ... 25
7 Marking and Instruction Manual ... 27
8 Attached Document, Transportation and Storage ... 27
Power Supply Vehicle
1 Scope
This Document specifies the technical requirements, test methods, inspection rules, marking,
packaging, transportation and storage of power supply vehicles.
This Document is applicable to power supply vehicles using a stereotyped car chassis or whole-
vehicle modification, equipped with a power frequency three-phase AC diesel generator set of
8kW to 1250 kW and a rated voltage of 400V. Power supply semi-trailers shall be implemented
by reference.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB 1495 Permissible noise limit emitted by power-driven vehicles
GB 1589 Limits of dimensions, axle load and masses for road vehicles
GB/T 2819-1995 General Specification for Mobile Electric Power Plant
GB/T 2820.1-2022 Reciprocating internal combustion engine driven alternating current
generating sets - Part 1: Application, ratings and performance
GB/T 2900.41 Electrotechnical terminology - Primary and secondary cells and batteries
GB/T 6072.1 Reciprocating internal combustion engines - Performance - Part 1:
Declarations of power fuel and lubricating oil consumptions and test methods - Additional
requirements for engines for general use
GB 7258 Safe specification for motor vehicles operating on roads
GB/T 7260.1 Uninterruptible power systems (UPS) – Part 1-1: General and Safety
Requirements for UPS used in operator access areas
GB/T 7260.2 Uninterruptible power systems (UPS)―Part 2: Electromagnetic
compatibility (EMC) requirements
3 Terms and Definitions
For the purposes of this Document, the terms and definitions given in JB/T 8194 and GB/T
2900.41 and the following apply.
3.1 Power supply vehicle
The special vehicle that is equipped with a generator set, optional uninterruptible power supply
system, transmission lines and other devices, and is used to provide power.
3.2 Compartment
The compartment body that is used to protect the generator set and related accessories in the
power supply vehicle.
3.3 Ventilation system
The ventilation device that provides combustion and cooling air to the generator set (including
engine and generator) in the compartment.
3.4 Rated output
The rated power mentioned in this Document is the basic power of the generator set specified
in 14.3.3 of GB/T 2820.1-2022.
3.5 Uninterruptible power system
A power system that is composed of a combination of converters, switches and energy storage
systems to maintain load power continuity when the input power fails.
NOTE: Energy storage systems can be divided into mechanical energy storage systems and rechargeable
energy storage systems (such as batteries).
3.6 Rechargeable energy storage system
An energy storage system that is rechargeable and provides electrical energy.
EXAMPLE: Such as lithium-ion batteries, capacitors, etc.
3.7 Battery management system
A system that monitors battery status (temperature, voltage, current, state of charge, etc.) and
provides communication interfaces and protection for the battery.
3.8 Delay time
The uninterruptible power supply operates at rated capacity and the time it takes for the voltage
of the rechargeable energy storage system to drop to the discharge cut-off voltage.
4 Technical Requirements
4.1 General
4.1.1 The power supply vehicle shall comply with the requirements of this Document and be
manufactured in accordance with the product drawings and technical documents approved by
the manufacturer's prescribed procedures.
4.1.2 Purchased and outsourced parts shall comply with the provisions of relevant standards
and have certificates of conformity from the manufacturer. They can only be used after passing
the inspection. All self-made parts can be assembled only after passing the inspection.
4.2 Environmental conditions
4.2.1 Environmental conditions for the rated power output of the power supply vehicle: Altitude
is 0m; ambient temperature is 25°C; and relative humidity is 30%.
4.2.2 The power supply vehicle shall be able to output the corrected specified power and work
reliably under the following conditions. The conditions shall be specified in the product
technical documents:
---The altitude does not exceed 4000m.
--- The low-temperature lower limits of the ambient temperature are: -40°C, -25°C, -10°C,
5°C; the high-temperature upper limits are: 40°C, 45°C, 50°C; the lower limit value and
upper limit value of the ambient temperature are each one of the above data.
--- Maximum relative humidity does not exceed 90% (25°C).
---The rainfall shall not exceed 8mm/h.
4.2.3 When the power supply vehicle is running, the working site shall be able to ensure that
the longitudinal (front and rear) horizontal inclination of the power supply vehicle is no more
than 6°; and the transverse (left and right) horizontal inclination is no more than 5°.
4.2.4 When the actual environmental conditions are worse than those specified in 4.2.1, for
non-supercharged and mechanically supercharged diesel engine units; the power is converted
into electrical power after converting the diesel engine power under test conditions according
to the provisions of GB/T 6072.1; but the maximum electrical power shall not exceed the rated
power of the generator. For units using other prime movers, the power correction method shall
be in accordance with the provisions of the product technical documents.
4.3 Whole vehicle
two-pole socket wiring shall meet the wiring specifications of zero on the left and fire on the
right.
4.3.13 Power supply vehicles with a rated power greater than 20kW shall be equipped with a
generator set starting battery voltage detection device. When the generator set starting battery
voltage is too low, there shall be an alarm indication.
4.3.14 A power supply vehicle with a rated power greater than 20kW shall be equipped with an
AC 220V or AC 380V charging device. After being connected, the starting battery can be
charged to the generator set.
4.3.15 Power supply vehicles with a rated power greater than 20kW should be equipped with a
camera with night vision function inside the compartment to monitor internal conditions from
outside the compartment.
4.3.16 For power supply vehicles with a length of the whole vehicle greater than 6m, the cab
shall be equipped with a reversing monitoring system.
4.3.17 The starting capability of the power supply vehicle shall meet the following requirements:
--- Normal temperature start: When the ambient temperature of the power vehicle generator
set is greater than 10°C, the unit shall be able to start successfully within 3 starts. The
starting battery capacity of the generator set shall meet the requirements for the unit to
be successfully started five times continuously.
--- Low-temperature start: When the power supply vehicle is used in low-temperature
environments, it shall be equipped with low-temperature start devices. The low-
temperature starting device can ensure that the generator set of a power supply vehicle
with a power of no more than 250kW under the lower limit temperature of the
environment shall be able to start smoothly within 30 min; and shall have the ability to
work with the specified load within 3 min after successful start. For power supply
vehicles with a power greater than 250kW, the starting time and load working time of the
generator set at low temperatures shall be in accordance with the provisions of the
product technical documents.
4.3.18 The continuous operation capability of the power supply vehicle under rated working
conditions shall meet the following requirements:
--- Under the conditions of 4.2.1 environmental conditions and sufficient fuel supply, the
power supply vehicle can continuously operate normally at rated power output for no
less than 12 h (including 1 h of operation at 10% overload);
--- Under the environmental conditions of 4.2.1, the power supply vehicle can continue to
operate at rated power output for no less than 4 h after a single fuel filling.
4.3.19 For a power supply vehicle equipped with an uninterruptible power supply system, the
uninterruptible power supply system can replace the unit to provide power to the load before
the generator set is started and operates stably. Its uninterruptible power supply system shall
meet the requirements of 4.8.
4.4 Safety requirements
4.4.1 The operation safety of the power supply vehicle shall comply with the provisions of GB
7258.
4.4.2 The outer dimensions, axle load and mass parameters of the power supply vehicle shall
comply with the provisions of GB 1589.
4.4.3 The power supply vehicle shall adopt a power supply system with neutral point insulation.
4.4.4 The insulation resistance of each electrical circuit to ground and between circuits in the
power supply system of the power vehicle sha meet the following requirements:
--- In hot state (the generator set operates at rated power for 1 h), the insulation resistance
shall be no less than 0.5MΩ;
--- In cold state (the generator set is left standing for 8 h), the insulation resistance shall be
no less than 10MΩ.
4.4.5 The withstand voltage values of each independent electrical circuit to ground and between
circuits in the electrical system of the power supply vehicle shall comply with the relevant
provisions of 4.13.3 of GB/T 2819-1995.
4.4.6 The power supply vehicle shall be equipped with a special vehicle body grounding device,
and the grounding device shall be marked with prescribed symbols or graphics. The grounding
device includes an insulated sheathed grounding wire with a length of no less than 10m and a
cross-sectional area of no less than 25mm2, and a grounding rod with a length of no less than
900mm and a diameter of no less than 16mm.
4.4.7 The vehicle chassis, generator set casing, energy storage device casing, fuel tank,
compartment, and distribution cabinet shall be reliably connected through yellow/green two-
color wires; and the resistance between each connection point shall be no greater than 0.5 Ω.
4.4.8 The power output junction box of the power supply vehicle shall be able to be closed and
locked under operating conditions; and the exposed live parts such as copper bars shall be
equipped with an insulating protective cover.
4.4.9 Near the power output end of the power supply vehicle, there must be a functional switch
for emergency stop of the power supply equipment. This functional switch also has the function
of preventing mis-operation.
4.4.10 The cab and compartment of the power supply vehicle shall be equipped with one set of
fire extinguishers of no less than 2 kg, respectively, which shall be installed securely and easy
to use.
4.5 Protective measures
4.5.1 Overload protection
The power supply vehicle shall have overload protection measures. When the load current
exceeds the specified overload current value, the overload protection device shall act reliably
within the specified time. The overload protection requirements are specified in the product
technical documents.
4.5.2 Short-circuit protection
The power supply vehicle shall have short-circuit protection measures. When a short circuit
occurs at the power output end (including single-phase, two-phase and three-phase short circuit);
the protection measures shall be able to act quickly and reliably so that the power supply vehicle
is not damaged.
4.5.3 Voltage protection
The generator set of the power supply vehicle shall have two protection measures, namely, low
voltage over-limit and high-voltage over-limit. When the voltage of the generator set exceeds
the limit due to internal or external reasons, the protective measures shall act reliably; and the
protection requirements shall be in accordance with the provisions of the product technical
documents. For power supply vehicle equipped with uninterruptible power supplies, their
uninterruptible power supply systems shall also have voltage protection functions.
4.5.4 Speed protection
The generator set of the power supply vehicle shall have a speed over-limit protection function.
The speed over-limit includes two states, namely, too low speed and too high speed. When the
speed over-limit state exceeds the specified time limit, the protection measures shall be able to
act quickly and reliably. The protection requirements are based on the provisions of product
technical documentation.
4.5.5 Temperature protection
The generator set of the power supply vehicle shall have high temperature protection measures.
When the ultra-high temperature operation of the generator set exceeds its specified time limit,
the protection measures shall be taken quickly to ensure that the power supply vehicle is not
damaged. For power supply vehicle equipped with uninterruptible power supply, the
uninterruptible power supply system shall also have temperature protection function.
4.5.6 Engine protection
In the event of a malfunction that may cause damage to the unit's prime mover, the generator
set of power supply vehicle shall have a protection or alarm function; and its requirements are
of the two inputs to the uninterruptible power supply host through the ATS dual power supply
switch; the mains power input has priority. When the mains power fails and the unit starts
running and closes, the ATS automatically switch to unit input mode.
4.8.3.2 Normal operation: When the input power supply is normal, the rectifier and inverter of
the main circuit of the uninterruptible power supply work normally; the static switch connects
the inverter output to the load; and the battery is in a floating charge state under the main DC
bus voltage.
4.8.3.3 Bypass operation: If the main circuit is overloaded or the inverter fails, the static transfer
switch automatically switches the load to bypass power supply, and the output power supply is
uninterrupted. After the main circuit returns to normal, the static transfer switch automatically
and intermittently switches the load to bypass mode.
4.8.3.4 If the rectifier stops running due to a mains power outage or abnormality, it can
continuously supply power to the inverter to ensure uninterrupted output power. When the input
power supply and rectifier resume normal operation, it will automatically exit without
interruption.
4.8.4 Uninterruptible power supply host and installation requirements
4.8.4.1 The uninterruptible power supply host output shall have the function of preventing
polarity reversal; and shall be able to issue corresponding abnormality alarms when the phase
sequence connection is abnormal.
4.8.4.2 The uninterruptible power supply host shall pass YD 5083 and YD 5096 certification;
and its earthquake resistance capability shall reach Level-8 and above magnitude.
4.8.4.3 When installing the uninterruptible power supply host, the vibration and impact under
vehicle driving conditions shall be fully considered; and corresponding vibration reduction and
anti-impact measures shall be set up.
4.8.5 Rechargeable energy storage system and installation requirements
4.8.5.1 The safety design of rechargeable energy storage systems shall meet the relevant
requirements of GB 18384.
4.8.5.2 The battery pack of the rechargeable energy storage system must meet the relevant
requirements of GB 38031.
4.8.5.3 The battery energy of the rechargeable energy storage system shall not be greater than
120 kW·h.
4.8.5.4 The rechargeable energy storage system shall be equipped with a battery management
system; and the battery management system shall meet the relevant requirements of 5.2, 5.3,
5.4, 5.5, 5.7, 5.14, 5.15, 5.16, 5.17, and 5.19 in GB/T 34131-2017. It has related functions such
as display, storage, and wave recording. It can monitor each battery in the vehicle in real time
(temperature, voltage, current, state of charge, installation and fixation status, etc.); and can
automatically disconnect the protection switch and alarm when abnormality occurs.
4.8.5.5 Each battery pack in the rechargeable energy storage system shall be products produced
by the same manufacturer with the same structure and chemical composition, and meet the
following requirements:
--- The difference between the maximum and minimum static open circuit voltages between
fully charged batteries in the battery module shall be no greater than 0.05V;
--- The difference between the maximum, minimum and average capacity of each battery in
the battery module shall not exceed ±1% of the average.
4.8.5.6 The charging and discharging process of the rechargeable energy storage system battery
shall be professionally monitored through the uninterruptible power supply host, and charging
by an external charger is not allowed.
4.8.5.7 The battery pack of the power supply vehicle equipped with uninterruptible power
supply must be installed and placed in separate compartments from the generator set.
4.8.5.8 The battery installation shall be equipped with shock-absorbing devices and
compression devices, which shall be installed securely and not move or fall when driving.
4.8.5.9 The distance between the battery installation position and the rear of the compartment
shall be no less than 400mm. The installation height of the battery pack on the vehicle shall
meet the requirements of 4.7.1 of GB 38032-2020. The battery shall be able to avoid direct
collision with the outside.
4.8.5.10 The battery shall be installed with waterproof and dustproof measures, and shall be
convenient for disassembly, assembly and maintenance.
4.9 Compartment
4.9.1 The compartment frame shall have sufficient strength and stiffness, and its dimensional
error shall meet the following requirements:
a) For compartment length less than or equal to 5000mm, the limit deviation is ±8mm; for
compartment length above 5000mm, the limit deviation is ±10mm.
b) Width: The limit deviation is ±8mm.
c) Height on the longitudinal center plane: the limit deviation is ±6mm.
d) The difference between the two diagonals of the door frame shall be no greater than 3mm.
e) The parallelism tolerance between door frames and columns is 3mm.
insulated and fireproof. Necessary rainproof measures shall be taken for exposed exhaust pipes.
4.9.14 The design of the compartment shall meet the requirements of rated power output of the
power supply vehicle and the continuous operation capability under rated working conditions.
4.10 Electrical circuit layout
4.10.1 The power cables of the generator set arranged in the compartment must have dedicated
wiring channels. The wiring channel shall have the functions of cable protection, insulation and
water accumulation prevention.
4.10.2 The control cables and communication cables of the generator set must have dedicated
wiring channels independent of the power cables. The wiring channel shall have the functions
of cable protection, insulation and water accumulation prevention.
4.10.3 The output end of the generator set and the output end of the power supply vehicle must
be marked with the name of the phase line that complies with national standards. Both ends of
the power cable arranged in the box must have color markings of no less than 150mm in length.
The A phase wire is marked with yellow color, the B phase wire is marked with green color, the
C phase wire is marked with red color, and the neutral wire N is marked with brown or light
blue color; and the grounding wire is marked with a special grounding conductor.
4.10.4 The power supply output end of the power supply truck is arranged from left to right or
from top to bottom in order of A, B, C and N phases (viewed from the terminals). There must
be clear letter identification on the terminals.
4.10.5 Power cables should be cables that meet the requirements of TB/T 1484.1; and their oil
resistance reaches Level-III standards. At the same time, the cable has certain wear resistance,
temperature resistance and flame-retardant properties. The cable carrying capacity shall be able
to meet the maximum output current of the power supply vehicle. The outer surface of the cable
shall have continuous markings such as nominal cross-section and voltage level that are not
easy to erase.
4.10.6 The control wires of the power supply vehicle shall be reasonably and neatly laid out,
firmly connected, and easy to maintain. The internal wire numbers, colors, and cross-sections
are consistent with the instructions.
4.10.7 For power vehicles equipped with uninterruptible power supply, the battery circuit of the
battery connection cable of the uninterruptible power supply system should be provided with
no less than two obvious disconnection points.
4.11 Instruments and indications
4.11.1 The power supply vehicle shall be able to display the main operating parameters of the
generator set and the uninterruptible power supply system, including voltage, current, frequency,
etc. The display accuracy level of voltage, current, and frequency is no less than Level-1.0, and
corresponding alarms can be issued when parameters are abnormal.
4.11.2 The power supply vehicle shall have an alarm device for abnormal oil pressure of the
generator set; and the water-cooled generator set shall also have an alarm device for abnormal
water temperature in the water tank.
4.11.3 The power supply vehicle shall have an indication and alarm device for the fuel quantity
of the generator set.
4.11.4 The instruments and indicator lights of the power supply vehicle shall be placed in a
position that is convenient for observation.
5 Test Methods
5.1 Test conditions and test preparation
The test conditions and test preparation of the power supply vehicle shall be carried out in
accordance with the provisions of GB/T 12534.
5.2 Basic performance test
The basic performance test of the power supply vehicle is carried out in accordance with the
provisions of QC/T 252.
5.3 Special performance test
5.3.1 Phase sequence inspection
According to Method-208 in GB/T 20136-2006, connect the power output terminals to the
corresponding terminals of the phase sequence indicator; start the generator set and the
uninterruptible power supply system respectively; and check whether the phase sequence
complies with the markings.
5.3.2 Start performance test
According to Method-206 in GB/T 20136-2006, when the generator set is started at normal
temperature and cold, the unit shall be able to start successfully. For units equipped with low-
temperature starting devices, it is necessary to confirm whether the low-temperature starting
device is working properly according to Method-207 in GB/T 20136-2006. For power supply
vehicles used in low-temperature environments, when starting the generator set under the lower
limit of ambient temperature, the unit shall be able to start successfully within 30 min.
5.3.3 Insulation resistance measurement
According to Method-101 in GB/T 20136-2006, when the ambient temperature is 15°C~35°C
and the relative air humidity is 45%~75%, let the generator set stand for 8 h and measure the
......

BASIC DATA
Standard ID QC/T 911-2023 (QC/T911-2023)
Description (Translated English) Power supply vehicle
Sector / Industry Automobile & Vehicle Industry Standard (Recommended)
Classification of Chinese Standard T59
Classification of International Standard 43.160
Word Count Estimation 18,151
Date of Issue 2023-04-21
Date of Implementation 2023-11-01
Summary This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of power supply vehicles. This standard is applicable to power supply vehicles using a stereotyped car chassis or vehicle modification, equipped with a power frequency three-phase AC diesel generator set of 8kW to 1250kW and a rated voltage of 400V. Power supply semi-trailers shall be implemented accordingly.