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QC/T 1101-2019

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QC/T 1101-2019 英文版 RFQ 询价 有增值税发票,[PDF]天数 <=3 电动汽车用电加热器 有效

   
标准编号: QC/T 1101-2019 (QC/T1101-2019)
中文名称: 电动汽车用电加热器
英文名称: Electric heater for electric vehicle
行业: 汽车行业标准 (推荐)
中标分类: T26
国际标准分类:
发布日期: 2019-08-02
实施日期: 2020-01-01
标准依据: 工业和信息化部公告2019年第29号

QC/T 1101-2019
(Electric heater for electric vehicles)
ICS 43.040.60
T26
QC
中 华 人 民 共 和 国 汽 车 行 业 标 准
电动汽车用电加热器
Electric heater for electric vehicle
2019 - 8 - 27发布
2020 - 1 - 1实施
中华人民共和国工业和信息化部 发
目次
前言...II
1 范围...1
2 规范性引用文件...1
3 术语和定义...1
4 要求...2
5 试验方法...5
6 检验规则...7
7 标志、包装、运输和贮存...9
前言
本标准按照GB/T 1.1-2009《标准化工作导则 第1部分:标准的结构和编写》给出的规则起草。
本标准由全国汽车标准化技术委员会(SAC/TC114)提出并归口。
本标准主要起草单位: 河北宏业永盛汽车加热器股份有限公司、镇江东方电热科技股份有限公司、
上海帕克热敏陶瓷有限公司、一汽解放事业部商用车开发院、苏州新业电子股份有限公司、比亚迪汽车
工业有限公司、华中科技大学、安徽苏立电气科技有限公司、江苏新林芝电子科技股份有限公司、深圳
赛尔盈电子有限公司(东莞分公司)。
本标准主要起草人:鲁国江、谭伟、徐伟、李龙勇、姜文中、陈雪峰、郝永德、何文霞、石永丰、
吴翔、王伟。
本标准为首次制定。
电动汽车用电加热器
1 范围
本标准规定了电动汽车用电加热器的定义、要求、试验方法、检验规则及标识、包装、运输、贮存
等。
本标准适用于电动汽车用电加热器(以下简称“电加热器”),但不适用于板式电加热器和电热膜电
加热器。
2 规范性引用文件
下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件,仅所注日期的版本适用于本文
件。凡是不注日期的引用文件,其最新版本(包括所有的修改单)适用于本文件。
GB/T 2408 塑料 燃烧性能的测定 水平法和垂直法
GB/T 2423.17 盐雾试验方法
GB/T 2423.22 环境试验 第2部分:试验方法 试验N:温度变化
GB/T 4208 外壳防护等级
GB/T 4857.5 包装 运输包装件 跌落试验方法
GB/T 18384.3 电动汽车 安全要求 第3部分 人员触电防护
GB/T 18655 车辆、船和内燃机 无线电骚扰特性 用于保护车载接收机的限值和测量方法
GB/T 30512 汽车禁用物质要求
CJ/T 268 城市客车燃油加热器
QC/T 29106 汽车电线束技术条件
3 术语和定义
下列术语和定义适用于本文件。
3.1
发热元件 heating elements
为电加热器提供热源的部件,它由电热材料、电极、绝缘体、散热部件等组成。
3.2
电加热器 electric heater
为电动汽车提供热源的采暖装置。主要由发热元件、电器控制单元、机械组件、电气组件等组成。
3.3
标准环境条件 standard environmental conditions
a)环境温度: 20℃±2℃;
b)相对湿度:50%~60%;
c)液体温度:20℃±2℃(适用于液体电加热器);
d)大气压: 101kPa±5kPa。
3.4
耐电压 withstand voltage
标准环境条件下,在规定时间内电加热器所承受的最大电压。
3.5
最大电流 maximum current
对电加热器施加额定电压时的最大电流(有效值)。
3.6
稳定工作状态 stable working condition
电加热器在标准试验条件下工作时,连续5min内电加热器的输入功率变化不大于±5%。
3.7
额定输入功率 rated power
在标准试验条件下,电加热器稳定工作状态的输入功率(不包含风机、水泵的输入功率)。
3.8
标称热效率 nominal thermal efficiency
在标准试验条件下,所测的放热量与额定输入功率的比值。
4 要求
4.1 工作环境
a) 周围空气温度在-40℃~85℃;
b) 大气压力 70kPa~106kPa;
c) 安装空间内无腐蚀、易燃、易爆性气体。
4.2 外观、尺寸
4.2.1 外观
电加热器外观应整洁、无损伤,标识应清晰。
4.2.2 尺寸
电加热器的尺寸应符合设计的技术图样要求,影响互换性及其安装的尺寸和公差应在设计图中注
明。
4.3.1 额定输入功率
在标准试验条件下,电加热器处于稳定工作状态时,所测其输入功率允许的公差范围不得大于±
10%。
4.3.2 标称热效率
在标准试验条件下,电加热器的标称热效率应不低于85%。
4.4 电气安全性能
4.4.1 最大电流
在标准试验条件下,电加热器启动过程中最大电流应不大于2.5倍的额定电流。
4.4.2 耐电压
绝缘电阻≥100MΩ。
4.4.3 电气强度
按5.6进行试验后,电加热器应无击穿、闪络或飞弧现象。当电加热器输入功率≤5kW时,其泄漏电
流≤10mA;当电加热器输入功率>5kW时,其泄漏电流≤20mA。
4.4.4 绝缘电阻
在标准环境条件下,电加热器冷态绝缘电阻应不小于100MΩ。
4.4.5 安全保护功能
-带电器控制单元的电加热器应有温度保护、过流、过/欠压等保护功能。
-带电器控制单元的电加热器应有高压防反接标识。
-当移开外壳可以露出 B 级电压带电部分时,外壳应有清晰可见且符合 GB/T 18384.3 要求的高压
警告标识。
4.5 机械性能
4.5.1 连接强度
电加热器引线端按5.8进行试验后,应无明显损伤、松动和脱落现象。
4.5.2 冲击强度
电加热器按5.9进行试验后,不应出现结构损坏,其输入功率变化不大于±10%,电气安全性能应符
合4.4的要求。
4.5.3 振动
符合4.4的要求。
4.5.4 跌落性能
出厂包装状态的电加热器按5.11试验方法从1000mm的高度跌落后,不应有明显损伤,其输入功率变
化不大于±10%,电气安全性能应符合4.4的要求。
4.6 耐候性能
4.6.1 温度交变
电加热器按5.12进行试验后,不应出现结构损坏,其输入功率变化不大于±10%,电气安全性能应
符合4.4的要求。
4.6.2 耐湿度
4.6.3 高温贮存
电加热器按5.14进行试验后,其输入功率变化不大于±10%,电气安全性能应符合4.4的要求。
4.6.4 低温贮存
电加热器按5.15进行试验后,其输入功率变化不大于±10%,电气安全性能应符合4.4的要求。
4.7 耐盐雾
电加热器应满足中性盐雾试验不小于96h。按5.16进行试验后,不得有腐蚀泄漏现象,其电气性能
应符合4.4的要求。
4.8 电磁骚扰
电加热器电磁骚扰应符合GB/T 18655相关要求。
液体电加热器按5.18进行试验后,其压降应不大于960Pa。
4.10 爆破压力性能
液体电加热器按5.19进行试验后,应无爆裂现象。
4.11 耐久性能
4.11.1 电加热器按 5.20.1进行试验后,其输入功率衰减不大于 10%,电气性能安全应符合 4.4的要
求。
4.11.2 电加热器按 5.20.2进行试验后,其输入功率衰减不大于 10%,电气性能安全应符合 4.4的要
求。
4.12 防护等级
4.13 阻燃
电加热器的非金属件按5.22试验后应符合水平燃烧HB级、垂直燃烧V0级。
4.14 耐压力脉冲性能
液体电加热器按5.23进行试验,试验后满足输入功率变化应不大于±10%,电气安全性能应符合4.4
的要求。
4.15 耐真空性
液体电加热器按5.24进行试验,试验后不得永久变形,密封性应符合4.9的要求,其输入功率衰减
不大于10%,电气安全性能应符合4.4的要求。
4.16 禁用物质
5 试验方法
5.1 标准试验条件
在标准环境条件下:
a)负载电压: U±2%(U为额定电压)。
b)适合液体电加热器:流量:12L/min(额定输入功率<10kW),30L/min(10kW≤额定输入功率≤
20kW),50L/min(额定输入功率>20kW)
5.2 仪器的要求
试验用的仪器仪表的精度或误差应符合下述要求:
-用于型式试验的电工测量仪表,其精度不低于0.5级,用于出厂检验的,应不低于1.0级
-测量时间的仪表,其精度在0.1s内。
-测量长度的量具,其允许误差为被测长度的±0.5%。
-测量湿度的仪表,其允许误差为被测相对湿度的±6%以内。
5.3 额定输入功率的测量
在5.1试验条件下,电加热器达到稳定工作状态的所测得的输入功率。
5.4 标称热效率的测定
在标准试验条件下,参照CJ/T 268放热量的测试方法测出电加热器在单位时间内的放热量和额定输
入功率后,按下述公式计算电加热器标称热效率。
η=P/Pi×100%
η--电加热器标称热效率
P--电加热器在单位时间内的放热量 kW
Pi--额定输入功率 kW
5.5 耐电压试验(适用于不带电器控制单元的电加热器)
将电加热器接入过电压试验电路中,对其施加额定电压1min,然后直接升到规定的过电压值保持
1min。额定电压小于DC350V时,耐电压值应不小于额定电压的2倍;额定电压大于等于DC350V时,耐电
压值应不小于额定电压的1.5倍。
5.6 电气强度试验
将电加热器放置在测试台上,不连接电源的情况下,在电加热器的电极和金属外壳或接地点之间施
5.7 绝缘电阻试验
将电加热器放置在测试台上,测量电加热器导线端子和金属外壳之间的绝缘电阻。高压电路测试电
压为DC1000V,低压电路测试电压为 DC500V。
5.8 连接强度试验
按QC/T 29106规定的要求进行测试。
5.9 冲击试验
电加热器在不工作的状态下,按照实际装车方式安装到冲击试验台,冲击峰值加速度为25g,冲击
持续时间为6ms,脉冲为半正弦,垂直、横向、纵向三个方向,每个方向脉冲数为10次。
5.10 振动试验
表1 振动要求
频率 振动加速度 振动方向 测试时间
10Hz~50Hz 3g
垂直 8h
横向 8h
纵向 8h
5.11 跌落性能试验
电加热器的跌落性能试验按GB/T 4857.5规定进行。
5.12 温度交变试验
T1=-40℃;T2=+105℃;循环数 5个;转换时间 2~3 min;暴露时间 30min。
5.13 耐湿度试验
电加热器在温度40℃±3℃,相对湿度范围90%~100%湿度箱中试验300h。
5.14 高温贮存试验
电加热器在温度120℃±3℃中放置48h,恢复常温后放置2h。
5.15 低温贮存试验
电加热器在温度-40℃±3℃中放置48h,恢复常温后放置2h。
5.16 耐盐雾试验
电加热器盐雾试验按GB/T 2423.17规定进行。
电加热器电磁骚扰应符合GB/T 18655相关规定进行。
5.18 密封性试验
液体电加热器充入0.2MPa气压、保压120s。
5.19 爆破压力试验
液体电加热器充入0.5MPa气压、保压30s。
5.20 耐久性能试验
电加热器的负载电压:1.15U±2%V(U为额定电压)。
5.20.1 在正常的工作条件下,将电加热器放置试验装置上,连续工作 1000h。
5.20.2 在正常的工作条件下,将电加热器放置试验装置上,电加热器通电 1min断电 1min,通断 10000
5.21 防护等级试验
电加热器的B级电压部件防护试验按GB/T 4208规定进行。
5.22 阻燃试验
电加热器的非金属件阻燃试验按GB/T 2408规定进行测试。
5.23 耐压力脉冲试验
液体电加热器在液体温度100℃±5℃情况下,压力交变次数20000次,交变压力0.02Mpa~0.25Mpa,
交变频率1Hz。
5.24 耐真空试验
将液体电加热器内部施加-90kPa的压力,保压60s后释放真空,重复5次。
禁用物质检测按GB/T 30512的规定进行。
6 检验规则
6.1 检验分类
检验分为出厂检验和型式检验,各类检验应按表2规定的项目进行。
表2 检验项目
序号 试验项目
出厂
检验
型式
技术要求 试验方法 1 2 3 4 5 6 7 8 9
1 外观尺寸
4.2 5.2
额定输入功
4.3.1 5.3
3 标称热效率 - 4.3.2 5.4
4 最大电流 √ 4.4.1 5.1、5.2
5 耐电压 √ 4.4.2 5.5
6 电气强度
7 绝缘电阻 4.4.4 5.7
8 安全保护功能 4.4.5 5.1、视检
9 连接强度
4.5.1 5.8
10 冲击强度 4.5.2 5.9
11 振动 4.5.3 5.10
12 跌落性能 4.5.4 5.11
13 温度交变 4.6.1 5.12
14 耐湿度 4.6.2 5.13
16 低温贮存 4.6.4 5.15
17 耐盐雾 4.7 5.16
18 电磁骚扰 4.8 5.17
19 密封性 √ 4.9 5.18
20 爆破压力性能
4.10 5.19
21 耐久性能 4.11 5.20
22 防护等级 4.12 5.21
23 阻燃 4.13 5.22
性能
4.14 5.23
25 耐真空性 4.15 5.24
26 禁用物质 4.16 5.25
27 标志、包装 √ 7.1、7.2 视检
注:“√”为应检项目,“-”为不检项目。试验分组可以随意结合,但应保证耐电压、跌落性能、耐盐
雾、爆破压力等具有破坏性试验项目放在所分组的最后试验。
6.2 出厂检验
产品在出厂前必须逐台按规定的项目进行检验,经制造厂质量检验部门检验合格并签发产品合格证
6.3 型式检验
6.3.1 有下列情况之一者,应进行型式检验:
a)新产品定型鉴定时;
b)当结构、材料、工艺有重大改变,影响产品性能时;
c)停产一年以上,再恢复生产时;
d)正常生产的同一型号超过10万台时;
e)出厂检验与定型检验出现重大差异时。
6.3.2 型式检验时,如果属 6.3.1中 a)、c)、d)三种情况,应按本标准要求的全部型式检验项目
进行检验;如果属 6.3.1中 b)、e)两种情况,可仅对受影响的性能进行检验。
6.3.4 型式检验结果,若有任何一项指标不符合要求时,应加倍抽样进行复检,复验后仍有指标不符
合要求时,则判断该产品不合格。
7 标识、包装、运输和贮存
7.1 标识
电加热器应在明显位置装有铭牌和高压标识,铭牌上应注明:
a)电加热器型号、名称;
b)额定电压;
c)额定电功率;
d)产品重量;
f)外形尺寸;
g)制造日期;
h)制造厂名称或工厂代号或按用户特殊要求。
7.2 包装
7.2.1 电加热器在包装箱内应适当防护,防止运输中磕碰。
7.2.2 包装箱应牢固可靠。箱外应表明产品名称、型号、制造年月、勿倒置、防潮等字样。
7.3 运输
包装完好的产品可用各种工具运输,运输途中不允许遭雨淋,避免剧烈振动和碰撞。
7.4 贮存
_________________________________

QC/T 1101-2019
(Electric heater for electric vehicles)
ICS 43.040.60
T26
QC
People's Republic of China Automotive Industry Standard
Electric heater for electric vehicle
Electric heater for electric vehicle
2019-8-27 released
2020-1-1 implementation
Issued by the Ministry of Industry and Information Technology of the People's Republic of China
Contents
Foreword ... II
1 Scope ... 1
2 Normative references ... 1
3 Terms and definitions ... 1
4 Requirements ... 2
5 Test methods ... 5
6 Inspection rules ... 7
7 Marking, packaging, transport and storage ... 9
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009 "Guidelines for Standardization Work Part 1. Standard Structure and Preparation"
This standard was proposed and managed by the National Automotive Standardization Technical Committee (SAC/TC114).
The main drafters of this standard. Hebei Hongye Yongsheng Automotive Heater Co., Ltd., Zhenjiang Dongfang Electric Heating Technology Co., Ltd.,
Shanghai Parker Thermal Ceramics Co., Ltd., Commercial Vehicle Development Institute of FAW Jiefang Division, Suzhou Xinye Electronics Co., Ltd., BYD Automotive
Industry Co., Ltd., Huazhong University of Science and Technology, Anhui Suli Electric Technology Co., Ltd., Jiangsu New Linzhi Electronic Technology Co., Ltd., Shenzhen
Purcell Electronics Co., Ltd. (Dongguan Branch).
The main drafters of this standard. Lu Guojiang, Tan Wei, Xu Wei, Li Longyong, Jiang Wenzhong, Chen Xuefeng, Hao Yongde, He Wenxia, Shi Yongfeng,
Wu Xiang and Wang Wei.
This standard was first formulated.
Electric heater for electric vehicle
1 Scope
This standard specifies the definition, requirements, test methods, inspection rules and identification, packaging, transportation, and storage of electric heaters for electric vehicles.
Wait.
This standard applies to electric heaters for electric vehicles (hereinafter referred to as "electric heaters"), but not to plate electric heaters and electric film heaters.
Heater.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 2408 Determination of flammability of plastics-Horizontal method and vertical method
GB/T 2423.17 Salt spray test method
GB/T 2423.22 Environmental test Part 2. Test method Test N. Temperature change
GB/T 4208 enclosure protection level
GB/T 4857.5 Drop test method for packaging and transportation packages
GB/T 18384.3 Safety requirements for electric vehicles. Part 3 Persons' protection against electric shock
GB/T 18655 Limits and measurement methods for radio disturbance characteristics of vehicles, ships and internal combustion engines to protect vehicle receiver
GB/T 30512 Requirements for prohibited substances in automobiles
CJ/T 268 city bus fuel heater
QC/T 29106 Technical conditions of automotive wiring harness
3 terms and definitions
The following terms and definitions apply to this document.
3.1
Heating elements
A component that provides a heat source for an electric heater, which is composed of an electrothermal material, an electrode, an insulator, and a heat dissipation component.
3.2
Electric heater
Heating device that provides a heat source for electric vehicles. It is mainly composed of heating elements, electrical control units, mechanical components, and electrical components.
3.3
Standard environmental conditions
a) Ambient temperature. 20 ℃ ± 2 ℃;
b) Relative humidity. 50% ~ 60%;
c) Liquid temperature. 20 ℃ ± 2 ℃ (suitable for liquid electric heater);
d) Atmospheric pressure. 101kPa ± 5kPa.
3.4
Withstand voltage
Under standard environmental conditions, the maximum voltage that the electric heater can withstand within a specified time.
3.5
Maximum current
Maximum current (effective value) when applying rated voltage to electric heater.
3.6
When the electric heater is operated under standard test conditions, the input power of the electric heater does not change by more than ± 5% within 5 minutes.
3.7
Rated power
Under standard test conditions, the input power of the electric heater in a stable working state (excluding the input power of the fan and pump).
3.8
Nominal thermal efficiency
Under standard test conditions, the ratio of the measured exothermic heat to the rated input power.
4 Requirements
4.1 Working environment
a) The ambient air temperature is -40 ℃ ~ 85 ℃;
b) Atmospheric pressure 70kPa ~ 106kPa;
c) No corrosive, flammable or explosive gas in the installation space.
4.2 Appearance and dimensions
4.2.1 Appearance
The appearance of the electric heater shall be neat and undamaged, and the marking shall be clear.
4.2.2 Dimensions
The dimensions of the electric heater should meet the design technical requirements. The dimensions and tolerances that affect interchangeability and their installation should be noted in the design
Bright.
4.3.1 Rated input power
Under standard test conditions, when the electric heater is in a stable working state, the allowable tolerance range of the measured input power must not be greater than ±
10%.
4.3.2 Nominal thermal efficiency
Under standard test conditions, the nominal thermal efficiency of the electric heater shall not be less than 85%.
4.4 Electrical safety performance
4.4.1 Maximum current
Under standard test conditions, the maximum current of the electric heater during startup shall be no more than 2.5 times the rated current.
4.4.2 Withstand voltage
Insulation resistance ≥100MΩ.
4.4.3 Electrical strength
After the test according to 5.6, the electric heater shall be free from breakdown, flashover or flashover. When the input power of the electric heater is ≤5kW, its leakage current
Current ≤10mA; when the input power of the electric heater is> 5kW, its leakage current is ≤20mA.
4.4.4 Insulation resistance
Under standard environmental conditions, the cold insulation resistance of the electric heater should not be less than 100MΩ.
4.4.5 Security protection function
-The electric heater with the electrical control unit should have protection functions such as temperature protection, overcurrent, over/under voltage.
-Electric heaters with electrical control units shall be marked with a high-voltage anti-reverse connection.
-When the enclosure is removed to expose the Class B voltage live part, the enclosure should have a high voltage that is clearly visible and meets the requirements of GB/T 18384.3
Warning sign.
4.5 Mechanical properties
4.5.1 Connection strength
After the lead end of the electric heater is tested in accordance with 5.8, there should be no obvious damage, loosening and shedding.
4.5.2 Impact strength
After the electric heater is tested in accordance with 5.9, there should be no structural damage, and its input power should not change more than ± 10%. The electrical safety performance should meet the requirements.
Meet the requirements of 4.4.
4.5.3 Vibration
Meet the requirements of 4.4.
4.5.4 Drop performance
The electric heater in the packaged state after being dropped from a height of 1000mm according to the 5.11 test method, there should be no obvious damage, and its input power changes.
It should be less than ± 10%, and the electrical safety performance should meet the requirements of 4.4.
4.6 Weatherability
4.6.1 Temperature change
After the electric heater is tested in accordance with 5.12, there should be no structural damage, and its input power should not change more than ± 10%. The electrical safety performance should be
Meet the requirements of 4.4.
4.6.2 Humidity resistance
4.6.3 High temperature storage
After the electric heater is tested in accordance with 5.14, the input power change is not greater than ± 10%, and the electrical safety performance should meet the requirements of 4.4.
4.6.4 Low temperature storage
After the electric heater is tested in accordance with 5.15, the input power change is not greater than ± 10%, and the electrical safety performance should meet the requirements of 4.4.
4.7 Salt spray resistance
The electric heater shall meet the neutral salt spray test not less than 96h. After the test according to 5.16, there shall be no corrosion leakage, and its electrical performance
Should meet the requirements of 4.4.
4.8 Electromagnetic disturbance
Electromagnetic interference of electric heaters shall meet the relevant requirements of GB/T 18655.
After the liquid electric heater is tested in accordance with 5.18, its pressure drop shall not be greater than 960Pa.
4.10 Burst pressure performance
After the liquid electric heater is tested in accordance with 5.19, there shall be no bursting.
4.11 Durability
4.11.1 After the electric heater is tested in accordance with 5.20.1, the input power attenuation is not greater than 10%, and the electrical performance safety shall meet the requirements of 4.4.
begging.
4.11.2 After the electric heater is tested in accordance with 5.20.2, the input power attenuation is not greater than 10%. The electrical performance safety shall meet the requirements of 4.4.
begging.
4.12 Degree of protection
4.13 Flame retardant
Non-metallic parts of electric heaters shall comply with horizontal combustion HB level and vertical combustion V0 level after the test according to 5.22.
4.14 Pressure pulse resistance
The liquid electric heater is tested in accordance with 5.23. After the test, the input power change shall not exceed ± 10%, and the electrical safety performance shall meet 4.4.
Requirements.
4.15 Vacuum resistance
The liquid electric heater shall be tested in accordance with 5.24. After the test, it shall not be permanently deformed. The tightness shall meet the requirements of 4.9. Its input power shall be attenuated.
Not more than 10%, the electrical safety performance should meet the requirements of 4.4.
4.16 Prohibited substances
5 Test method
5.1 Standard test conditions
Under standard environmental conditions.
a) Load voltage. U ± 2% (U is the rated voltage).
b) Suitable for liquid electric heaters. flow rate. 12L/min (rated input power <10kW), 30L/min (10kW ≤ rated input power ≤
20kW), 50L/min (rated input power> 20kW)
5.2 Instrument requirements
The accuracy or error of the instruments used in the test shall meet the following requirements.
-Electrical measuring instruments used for type testing, whose accuracy is not less than 0.5, and for factory inspection, it should not be less than 1.0
-An instrument for measuring time, its accuracy is within 0.1s.
-A measuring tool for measuring the length, the tolerance of which is ± 0.5% of the measured length.
-Instrument for measuring humidity, whose allowable error is within ± 6% of the measured relative humidity.
5.3 Measurement of rated input power
Under 5.1 test conditions, the measured input power of the electric heater reaches a stable working state.
5.4 Determination of nominal thermal efficiency
Under standard test conditions, refer to the CJ/T 268 test method for heat release to measure the heat release and rated output of electric heaters per unit time.
After entering the power, calculate the nominal thermal efficiency of the electric heater according to the following formula.
η = P/Pi × 100%
η--Nominal thermal efficiency of electric heater
P--Exothermic heat of electric heater in unit time kW
Pi--rated input power kW
5.5 Withstand voltage test (for electric heaters without electrical control unit)
Connect the electric heater to the over-voltage test circuit, apply the rated voltage to it for 1 min, and then directly rise to the specified over-voltage value to maintain
1min. When the rated voltage is less than DC350V, the withstand voltage should not be less than twice the rated voltage; when the rated voltage is greater than or equal to DC350V, the withstand voltage
The voltage value should not be less than 1.5 times of the rated voltage.
5.6 Electrical strength test
Place the electric heater on the test bench, and connect it between the electrode of the electric heater and the metal case or ground without connecting the power supply.
5.7 Insulation resistance test
Place the electric heater on a test bench and measure the insulation resistance between the electric heater wire terminals and the metal case. High-voltage circuit test
The voltage is DC1000V, and the low-voltage circuit test voltage is DC500V.
5.8 Connection strength test
Test in accordance with the requirements specified in QC/T 29106.
5.9 Impact test
When the electric heater is not working, it is installed on the impact test bench according to the actual loading method. The peak acceleration of the impact is 25g.
The duration is 6ms, the pulse is half-sine, vertical, horizontal and vertical three directions, the number of pulses in each direction is 10 times.
5.10 Vibration test
   
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