LDY-D120 earth pole surge arrester

Specifications earth pole surge arrester

1.Sole agents in 5 nations

2.gas discharge tube structure

3.Uc: 255V In:120kA Single electrode

LDY-D120 earth pole surge arrester   Application range The earth pole protection device is mainly applied to avoid the danger of potential difference between different grounding grids. When lighting comes as the short distance among different grounding grids, the ground potential of some grounding grid may be elevated high simultaneously, thus high potential difference occur with other grounding grids, which may exist among network consisting of circuit and device among different earth pole, that is ground potential counterattack, which may damage the device and hurt the people. Under this condition the earth pole protective device should be installed among different grounding grids, so as to avoid ground potential counterattack.   Main Feature: High discharge capacity low residual voltage; Build in high performance gas discharge tube or multilayer gap high security performance; D120 introducing the structure of gas discharge tube and D150 introducing 3 layer gap structure strong arc-rupturing capacity; Modularized design convenient for installation and replacement introducing wiring terminal connection, reliable and convenient wiring.   Main technical data

Type	LDY-D120	LDY-D150
Max. continuous operating voltage Uc V	255	255
Leakage current (75% Uc)	0	0
Nominal discharge current In (8/20μs) kA	120	150
Impulse discharge current Iimp (10/350μs) kA	20	50
Electrode	Single electrode	Triple-lay electrode
Response voltage V	600	1000
Part No.	088301	088302
Response time tA	< 100 ns
Housing material	Enhanced flame retardant nylon (light gray, flame retardancy degree: V0)
Cross-section	≥ 16 mm2 stranded/flexible conductor

  Installation position Earth pole protection devices are applied between the main equipotential bonding bar of different power network, these equipotential bonding bars are linked by connection cable and protector the length of connection line should be as short as possible, usually less than 0 5m, in order to avoid the inductive overvoltage caused by too long line.