Neutral Grounding Resistor

Specifications

Neutral Grounding Resistor (NGR) works as protection part in the high voltage transmission line system instead of damping resistor. 

Resistor parameters

1.1 System voltage : 70V

1.2 Resistance loop: 70/ KV

1.3  Rated current and rated time: 200A/10S

1.4 Rated resistance value: 200 ohm

1.5 Resistance material: 310s

1.6 Resistance error: ±5%

1.7  Frequency withstand voltage: 140KV on power for 1min(50HZ).

1.8 Degree pollution for creepage distance for external: 35mm/KV

1.9 Degree pollution for creepage distance for internal: 25mm/KV

1.10 Net distance in space

1.11 Working condition

1.11.1 Installation mode: outdoor

1.11.2 IP Degree: IP23

1.11.3 Cable connecting mode: incoming from above and outgoing from bottom.

1.11.4 Enclosure: pot galvanizing plate

1.11.5 Overall dimension: W6500 X D1400 X H3800

1.11.6Units connecting mode: stainless steel tube connecting outside.

1.11.7Overall diagram: LG09.091909BZ001-2

1.12 : This resistor is following with IEEE32. DL/T 780-2001

   Single box resistor

2.1 Rated resistance value: 25 ohm

2.2  Resistance value error: ±5%

2.3 Frequency withstand voltage: 42KV on power for 1min(50HZ)

2.4 Degree of pollution for creepage distance for external: 35mm/KV.

2.5 Degree of pollution for creepage distance for internal: 25mm/KV

2.6  Installation mode: outdoor.

2.7IP Degree: IP23

2.8Enclosure material: pot galvanizing plate

2.9 Overall dimension: W1200 X  D1400 X H1120

2.10 Overall diagram: LG09.091909BZ001-1

   Resistor units

3.1

Units

3.1.Units names: 310s

3.1.2 Resistive: 0.95±0.05

3.1.3 Units temperature rate: K

3.1.4  Rustproof: good

3.1.5 Mechanical : good

Support insulator technical parameters for outside

Wall bushing parameters for outside