| 摘要 |
PROBLEM TO BE SOLVED: To provide a distribution board fitted with a lighting arrester, which can protect load from thunder surge going through an antenna line, a telephone line, etc., and is also applicable to the use of the communication line of a power source line, and further in which the insulation test of an apparatus, etc., can be performed easily. SOLUTION: This distribution board 1 fitted with a lighting arrester of a constitution such that a power source line 2, a telephone line 3, and an antenna line 4 are led in itself and they are connected severally to the lightning arrester 1 to release thunder surge to the ground via a grounding conductor 9, so this can perform the lightning protection of all the cables led in from the outdoors, in a general housing. Moreover, this can jointly have the inflow checking effect of the thunder change and the signal deterioration preventive function in the case where the power line is used as a signal line, by connecting a ZnO element 71 and a discharge tube 72 in series, thereby making them function as a surge absorber which is small in capacitance. |
