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FIRE-RETARDANT COMMUNICATION CABLES FOR COAL MINES

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Scope of application:The product uses in the coal mine mine shaft telephone communication skeleton line, matches the line and the subscriber's loop

ִ�б�׼ Standards implemented:MT 81814-1999

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Model��Descriptions and Use scope

�ͺ�
Model
�� ��
Descriptions
ʹ �� �� Χ
Use scope
MHYV
ú���þ���ϩ��Ե������ϩ����ͨ�ŵ���
PE insulated PVC sheathed communication cables for coal mines
����ƽ�б�P��������
Served in level,slanted channels and power house
MHJYV
ú���ü�ǿ����о����ϩ��Ե������ϩ����ͨ�ŵ���
Reinforced core PE insulated PVC sheathed communication cables for coal mines
���ڻ�е���˽ϸߵ�ƽ���б��
Served in level and slanted channels where mechanical damage is frequent
MHYBV
ú���þ���ϩ��Ե��п��˿��֯��װ������ϩ����ͨ�ŵ���
PE insulated galvanized steel wire weave armored PVC sheathed communication cables for coal mines
���ڻ�е����ϸߵ�ƽ���б��
Served in level and slanted channels where mechanical damage is frequent
MHYAV
ú���þ���ϩ��Ե��-����ϩճ���������ϩ����ͨ�ŵ���
PE insulated Al/PE binding layer PVC sheathed communication cables for coal mines
���ڽϳ�ʪ��б����ƽ��
Served in level and slanted channels with high humidity
MHYA32
ú���þ���ϩ��Ե��-����ϩճ�Ụ���˿��װ������ϩ����ͨ�ŵ���
PE insulated Al/PE binding layer steel wire armored PVC sheathed communication cables for coal mines
�����������
Served in shaft and slanted shaft

ʹ������ Service characteristics

���³�����������¶� Long-term service temperature of the cable conductor
-40��-+50��
���·����¶� Cable laying temperature
��-10��
+25��ʱ�������ʪ��
Environment relative humidity at 25��
��95%
���µ���С�����뾶 Minimun bending radius MHYV��MHJYV�͵���Ϊ�����⾶��10���������ͺ�Ϊ�⾶��15�� 10 times of the cable outer diameter of MHJYV, and 15times for the rest

���¹�� Specifications

�� ��
Model
�� ��
Specifications
����ṹ(��/ֱ��)mm
Conductor structure(number/diameter)
MHYV
1x2��2x2��1x4��5x2
7/0.28
MHJYV
1x2��2x2
4/0.28ͭ��+3/0.28���� 4/0.28
copper wire +3/0.28 steel wire
MHYBV
5x2��10x2��20x2
1/0.8
MHYAV
20x2��30x2��50x2
MHYA32
30x2��50x2��80x2


������Ҫ�������� Major technical performances

1�����µ���ֱ�����輰����˥�� DC resistance of the conductor and Intrinsic attenuation

�� ��
Model
20��ʱ����ֱ������
DC resistance of conductor at 20��
�ܦ� ( �� /km)
����˥��(800Hz)
Intrinsic attenuation
��( ,dB/km)
MHYV
45
1.10
MHJYV
73
1.30
MHYBV MHYAV MHYA32
36.7
0.95

2������������Ҫ�������� Other major technical performances

( MHYV��MHJYV��MHYBV MHYAV��MHYA32)

�� ��
Serial number
��Ŀ
Items
��������
Technical performances
1
+20����оֱ������(�ܦ�/Km)
Line core DC resistance at 20��
���ϱ� See above table
2
���¹���˥��(��dB/Km)
Cable intrinsic attenuation
���ϱ� See above table
3
+20���Ե����(��M�� Km) Insulating resistance at 20�� 3000
4
lmin��Ƶ������ѹ����
lmin power frequency alternating current pressure test
1500V������(50Hz)
1500V Does not penetrate
5
Զ�˴���˥��(��dB/500)
Far-end crosstalk attenuation
70(800Hz)
6
���(�ܦ�H/Km)
Inductance
800(800Hz)
7
���¹�������(�ܦ�F/Km)
Cable service capacity
0.06(800Hz)
8
������ֱ�������(��%����)
DC resistance difference
2
9
������ֱȼ������
Combustion for single cable test
MT386
10
����ȼ������
Combustion for bunched cable test
����GB/T18380��׼��B�����ȼ������Ҫ��
Conforms to GB/T18380 standard B kind becomes ties the burning test

���½ṹʾ��ͼ
IIIustration of cable structure




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