The cable protector shell is used in JDBX grounding protection
box, JCHX cross inter-connection boxes. It is the core components
of the two products. It’s made of ZnO varistor valve plates,
electrodes, internal/external insulation. It restricts induction
over-voltage on the cable metal sheath, ensuring that the sheath
insulation would not breakdown by over-voltage.
The core protective elements is using ZnO varistor plates,
electrode sprayed aluminum, which makes it contact well without
series gap. It has good protection features and excellent voltage
characteristic curve (picture below, right).
Use epoxy fiberglass as internal insulation, insulating silicone
rubber material as external insulation with superior electrical
performance and good self-sealing performance.
Type and Requirements
D.C. 1mA reference voltage (kV)
2ms Square Wave Impulse Voltage 18 times(A)
0.75U, 1mA leakage current
8/20s/10kA impulse current