Test method for fire resistance of cables under temperature rise condition of building fire

doi:10.16265/j.cnki.issn1003-3033.2023.09.2227

Abstract

Abstract:

In order to test the fire resistance of cables at the fully developed stage of fire, two test methods (method A and B) for fire resistance of cables under the temperature rise conditions of building fire were put forward from the aspects of fire conditions, judgment method, fire resistance time, and sample installation. Moreover, a test platform of cable fire resistance under the temperature rise conditions of building fire was set up. Finally, the traditional fire resistance test method and two new test methods were used to test the fire resistance of 21 cables. The results show that compared with the traditional fire resistance test method, the new test method can effectively distinguish fire resistance time of cables. The new test method can test the fire resistance of 1 to 12 cables at the same time, which improves the test efficiency. The fire resistance time of 9 cables in two fire resistance tests are approximately the same, indicating that the new test method has good reproducibility in testing the fire resistance of cables.

Key words: building fire, temperature rise condition, fire-resistant cables, fire resistance, temperature rise curve, test method

HU Linming, HE Yan, GAO Fengli, FENG Jun, ZHANG Xiang, WANG Jinyuan. Test method for fire resistance of cables under temperature rise condition of building fire[J]. China Safety Science Journal, 2023, 33(9): 129-135.

Figures/Tables 9

Tab.1

Tab.2

Fig.1

Fig.2

Fig.3

Tab.3

Fig.4

Fig.5

Tab.4

References 28

[1]	郝广雨. 一起高层建筑电缆井火灾的调查与整改分析[J]. 消防科学与技术, 2021, 40(5):772-774.
	HAO Guangyu. Investigation and rectification analysis of a high-rise building cable well fire[J]. Fire Science and Technology, 2021, 40(5):772-774.
[2]	米红甫, 张小梅, 杨文璟, 等. 城市地下综合管廊电缆舱火灾概率分析方法[J]. 中国安全科学学报, 2021, 31(1):165-172. doi: 10.16265/j.cnki.issn 1003-3033.2021.01.024
	MI Hongfu, ZHANG Xiaomei, YANG Wenjing, et al. Fire probability analysis method of cable cabin in urban utility tunnel[J]. China Safety Science Journal, 2021, 31(1):165-172. doi: 10.16265/j.cnki.issn 1003-3033.2021.01.024
[3]	刘向东, 杨新华, 张斗. 安全保护区外铁路电力电缆保护措施研究[J]. 中国安全科学学报, 2018, 28(增2):74-78.
	LIU Xiangdong, YANG Xinhua, ZHANG Dou. Study on protection solutions and measures of railway power cables outside railway safety protection area[J]. China Safety Science Journal, 2018, 28(S2):74-78. doi: 10.16265/j.cnki.issn1003-3033.2018.S2.013
[4]	IEC 60331-21-1999, Tests for electric electrical cables under fire conditions-circuit integrity-part 21: procedures and requirements-electrical cables of rated voltage up to and including 0, 6/1, 0 kV[S].
[5]	IEC 60331-23-1999, Tests for electric electrical cables under fire conditions-circuit integrity-part 23: procedures and requirements-electric data electrical cables[S].
[6]	IEC 60331-25-1999, Tests for electric electrical cables under fire conditionscircuit integritypart 25: procedures and requirementsoptical fibre electrical cables[S].
[7]	IEC 60331-1-2018, Tests for electric electrical cables under fire conditions-circuit integrity-part 1: test method for fire with shock at a temperature of at least 830 ℃ for electrical cables of rated voltage up to and including 0, 6/1, 0 kV and with an overall diameter exceeding 20 mm[S].
[8]	IEC 60331-2-2018, Tests for electric electrical cables under fire conditions-circuit integrity-part 1: test method for fire with shock at a temperature of at least 830 ℃ for electrical cables of rated voltage up to and including 0, 6/1, 0 kV and with an overall diameter not exceeding 20 mm[S].
[9]	IEC 60331-3-2018, Tests for electric electrical cables under fire conditions-circuit integrity-part 3: test method for fire with shock at a temperature of at least 830 ℃ for electrical cables of rated voltage up to and including 0, 6/1, 0 kV tested in a metal enclosure[S].
[10]	BS 6387-2013, Test method for resistance to fire of electrical cables required to maintain circuit integrity under fire conditions[S].
[11]	BS 8491-2008, Method for assessment of fire integrity of large diameter power electrical cables for use as components for smoke and heat control systems and certain other active fire safety systems[S].
[12]	GB/T 19216.1—2021/IEC 60331.1—2018, 在火焰条件下电缆或光缆的线路完整性试验第1部分: 火焰温度不低于830℃的供火并施加冲击振动, 额定电压0.6/1 kV及以下外径超过20 mm电缆的试验方法[S].
	GB/T 19216.1-2021/IEC 60331.1-2018, Tests for electric cables under fire conditions-circuit integrity-part 1: test method for fire with shock at a temperature of at least 830 ℃ for cables of rated voltage up to and including 0,6/1,0 kV and with an overall diameter exceeding 20 mm[S].
[13]	GB/T 19216.2—2021/IEC 60331.2—2018, 在火焰条件下电缆或光缆的线路完整性试验第2部分: 火焰温度不低于830℃的供火并施加冲击振动, 额定电压0.6/1kV及以下外径不超过20 mm电缆的试验方法[S].
	GB/T 19216.2-2021/IEC 60331.2-2018, Tests for electric cables under fire conditions-circuit integrity-part 2: test method for fire with shock at a temperature of at least 830 ℃ for cables of rated voltage up to and including 0,6/1,0 kV and with an overall diameter not exceeding 20 mm[S].
[14]	GB/T 19216.3—2021/IEC 60331.3—2018, 在火焰条件下电缆或光缆的线路完整性试验第3部分: 火焰温度不低于830℃的供火并施加冲击振动, 额定电压0.6/1 kV及以下电缆穿在金属管中进行的试验方法[S].
	GB/T 19216.3-2021/IEC 60331.3-2018, Tests for electric cables under fire conditions-circuit integrity-part 3: test method for fire with shock at a temperature of at least 830 ℃ for cables of rated voltage up to and including 0,6/1,0 kV tested in a metal enclosure[S].
[15]	T/ASC6002—2021, 消防用电线电缆耐火性能试验方法[S].
	T/ASC6002-2021, Test methods for fire resistant behavior on fire dedicated cables[S].
[16]	李陈莹, 陈杰, 谭笑, 等. 电缆燃烧典型火源模拟方法综述[J]. 消防科学与技术, 2021, 40(3):345-351.
	LI Chenying, CHEN Jie, TAN Xiao, et al. A review of typical fire source simulation methods for cable combustion[J]. Fire Science and Technology, 2021, 40(3):345-351.
[17]	包光宏, 冯军, 胡林明, 等. 消防用电线电缆耐火性能试验方法研究[J]. 消防科学与技术, 2021, 40(9):1294-1297.
	BAO Guanghong, FENG Jun, HU Linming, et al. Research on test methods for fire resistant performance of dedicated fire cables[J]. Fire Science and Technology, 2021, 40(9):1294-1297.
[18]	唐勇, 冯军, 张秉浩, 等. BBTRZ型耐火电缆的耐火性能研究[J]. 消防科学与技术, 2018, 37(3):310-313.
	TANG Yong, FENG Jun, ZHANG Binghao, et al. Research on performance of BBTRZ fire-resistance cables[J]. Fire Science and Technology, 2018, 37(3):310-313.
[19]	任虹光, 万育萍, 刘威, 等. 火灾工况下耐火电缆的电-热耦合场研究[J]. 电线电缆, 2018(6):4-5.
	REN Hongguang, WAN Yuping, LIU Wei, et al. Research on current and temperature coupling fields of fire-resistant cable under fire[J]. Electric Wire & Cable, 2018(6):4-5.
[20]	POLANSKY R, POLANSKÁ M. Testing of the fire-proof functionality of cable insulation under fire conditions via insulation resistance measurements[J]. Engineering Failure Analysis, 2015, 57:334-349. doi: 10.1016/j.engfailanal.2015.08.001
[21]	KOROLCHENKO D, EREMINA T, TANKLEVSKY L. Operation of cable lines under fire conditions[J]. E3S Web of Conferences, 2020, 221: DOI: 10.1051/e3sconf/202022102007.
[22]	KAMIL M, ONUR M, DILEK D, et al. Development and evaluation of fire resistant railway signalling cable[J]. European Journal of Science and Technology, 2021, 29:366-370.
[23]	ISO 834-1-1999, Fire-resistance tests - elements of building construction-part 1: general requirements[S].
[24]	GB 51348—2019, 民用建筑电气设计标准[S].
	GB 51348-2019, Standard for electrical design of civil buildings[S].
[25]	GB/T 34926—2017, 额定电压0.6/1 kV及以下云母带矿物绝缘波纹铜护套电缆及终端[S].
	GB/T 34926-2017, Corrugated copper metallic sheath mica tape mineral insulated cables and their terminations with a rated voltage up to and including 0.6/1 kV[S].
[26]	GB/T 12706.1—2020, 额定电压1 kV(U_m=1.2 kV)到35 kV(U_m=40.5 kV)挤包绝缘电力电缆及附件第1部分:额定电压1 kV (U_m=1.2 kV)和3 kV(U_m=3.6 kV)电缆[S].
	GB/T 12706.1-2020, Power cables with extruded insulation and their accessories for rated voltages from 1 kV (U_m=1.2 kV) up to 35 kV (U_m=40.5 kV)-part 1: cables for rated voltage of 1 kV(U_m = 1.2 kV)and 3 kV(U_m =3.6 kV)[S].
[27]	GB/T13033.1—2007/IEC 60702-1:2002, 额定电压750 V及以下矿物绝缘电缆及终端第1部分:电缆[S].
	GB/T13033.1-2007/IEC 60702-1:2002, Mineral insulated cables and their terminations with a rated voltage not exceeding 750 V-part1: cables[S].
[28]	GB/T 9330—2020, 塑料绝缘控制电缆[S].
	GB/T 9330-2020, Plastic insulated control cables[S].

消防用电设备	持续供电时间/min
火灾自动报警装置	≥180 (120)
消火栓、消防泵及水幕泵	≥180 (120)
自动喷水系统	≥60
水喷雾和泡沫灭火系统	≥30
CO₂灭火和干粉灭火系统	≥30
防、排烟设备	≥90、60、30
火灾应急广播	≥90、60、30
消防电梯	≥180 (120)

耐火时间/min	新方法A		新方法B
耐火时间/min	级别	温度/℃	级别	温度/℃
≥30	A30	842	B30	842
≥60	A60	945	B60	945
≥90	A90	1 006	B90	950
≥120	A120	1 049	B120	950
≥180	A180	1 109	B180	950

样品编号	型号规格	制造商代号	IEC 60331-21- 1999^[4] /min	新方法A/ min	新方法B/ min
S01	RTTZ 0.6/1 kV 5×2.5	M1	180	64	43
S02	RTTZ 0.6/1 kV 5×16	M1	180	73	80
S03	RTTZ 0.6/1 kV 4×50+1×25	M1	180	80	84
S04	WD-RTTZ 0.6/1 kV 5×2.5	M1	180	49	63
S05	WDZBN-YJY-0.6/1 kV 5×2.5	M2	180	31	26
S06	BTTZ-750 V 4×16	M2	180	109	118
S07	FEC 0.6/1 kV 3×10+1×4	M2	180	143	180
S08	WDZCN-YJY 0.6/1 kV 5×16	M2	180	46	55
S09	WDZCN-YJY 0.6/1 kV 5×2.5	M2	180	37	41
S10	WDZCN-YJY 0.6/1 kV 5×50	M2	180	74	88
S11	RBBY 0.6/1 kV 4×240+1×120	M3	180	57	74
S12	WDZBN-YJV-0.6/1 kV 5×10	M3	180	42	36
S13	BTTZ 750 V 4×16	M3	180	62	61
S14	BTTZ 750 V 4×16	M4	180	152	180
S15	WDZN-YJY-0.6/1 kV 5×2.5	M5	180	20	15
S16	WDZN-YJY-0.6/1 kV 5×16	M5	180	27	24
S17	WDZN-YJY-0.6/1 kV 4×50+1×25	M5	180	25	28
S18	WDZN-KYJYP2-450/750 V 5×1.5	M5	180	15	20
S19	WDZN-YJY 5×2.5	M6	180	68	70
S20	WDZN-YJY-0.6/1 kV 5×16	M6	180	71	79
S21	WDZN-YJY-0.6/1 kV 4×50+1×25	M6	180	88	95

耐火时间/ min	新方法A		新方法B
耐火时间/ min	级别	根数	级别	根数
<30	—	4	—	5
≥30	A30	6	B30	4
≥60	A60	8	B60	8
≥90	A90	1	B90	2
≥120	A120	2	B120	0
≥180	A180	0	B180	2