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Application
Mining explosion proof illumination signal transformer comprehensive protection device is applicable in coal mine and around places full of explosive gas mixture such as methane, coal dust and so on. In power supply circuit of 127V, it mainly used to control the power of illumination and signal load.
Features
Full protections, with dangerous indications of short circuit, leakage, leakage interlock, insulation power, etc.
Main technical parameters
|
Type |
ZBZ-2.5/660(380)M |
ZBZ-2.5/1140(660)M |
ZBZ-4/660(380)M |
ZBZ-4/1140(660)M |
|
|
Main transformer |
Connection mode |
△/△or Y/△ |
△/△or Y/△ |
△/△or Y/△ |
△/△or Y/△ |
|
Rated voltage |
660(380)/133 |
1140(660)/133 |
660(380)/133 |
1140(660)/133 |
|
|
Rated current (A) |
2.19(3.79)/10.85 |
1.26(2.19)/10.85 |
3.5(6.08)/17.4 |
2.02(3.58)/17.4 |
|
|
Outline dimension Width ×Depth×Height |
520×505×645 |
|
520×645×654 |
|
|
|
Weight |
98 |
|
122 |
|
|
|
Cable O.D. |
8-19 |
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Refer to the following table for parameters of lighting short-circuit protection
|
Cable section mm² |
Protection distance (m) |
|
|
ZBZ-4.0M current setting 20A |
ZBX-2.5Mcurrent setting 12A |
|
|
6 |
600 |
900 |
|
4 |
400 |
600 |
|
2.5 |
250 |
400 |
|
1.5 |
150 |
250 |
|
1 |
100 |
150 |
Refer to the following table for parameters of signal short-circuit protection
|
Cable section mm² |
Protection distance (m) |
|
|
ZBA-4.0M current setting 5.5A |
ZBX-2.5M current setting 4.5A |
|
|
6 |
1800 |
1800 |
|
4 |
1400 |
1500 |
|
2.5 |
850 |
1000 |
|
1.5 |
600 |
650 |
|
1 |
400 |
450 |
Refer to the following table for main protection values
|
Lighting short-circuit protection time (s) |
＜0.25 |
|
Signal short-circuit protection time (s) |
＜0.4 |
|
Setting value of ground leakage resistance (kΩ) |
1.5(1.5~3 adjustable) |
|
Operating value of ground leakage locking resistance (kΩ) |
3±1 |
|
Danger indicating value for cable insulation (kΩ) |
10±2 |
|
Operating time of ground leakage protection (s) |
＜0.25 |
|
Permissible fluctuation range of working voltage (Ue) |
±10％ |