Widely used in transformer secondary and generator stator side neutral points, it can eliminate overvoltage such as ferromagnetic resonance and wire breakage resonance, limit fault current, and has a relatively low gap arc overvoltage, making line selection more accurate. Mainly used for power transmission and distribution systems below 110kV, which are mainly composed of cable lines, single-phase grounding faults, and power plant auxiliary power systems with high capacitance current. Although the capacitance current is small, it is mainly used to prevent resonance overvoltage. The former is mostly low resistance grounding, while the latter is mostly high resistance grounding. At present, neutral grounding resistors are widely used in urban distribution networks, large industrial parks, power plants, offshore platform distribution systems, and large chemical enterprises.

Appearance and dimensions:Customized according to customer requirements

Technical characteristics:

• Fault current: 1-5000A
  

• System voltage: 0.38kV~110kV (3, 6, 10, 35)
  

• Heating time: 5S, 10S, 30S, 60S, continuous
  

• Resistance value (20 ℃): 0.01~1500 Ω
  

• Temperature rise: Short term temperature rise (10-60S) maximum not exceeding 760 ℃, continuous temperature rise maximum not exceeding 385 ℃
  

• Maintenance free, quick and convenient disassembly and replacement
  

• Compact structure and easy installation
  

• Shell protection level: IP20~IP56
  

• Optional accessories such as isolation switch, auxiliary switch, heater, CT, monitor, etc.

Figure 1							◎ HNGR6.3-300-12-10-54
							Rated Voltage: 6.3/V3KV
							Fault current: 300A
							Rated resistance: 12 Ω
							Rated time: 10S
							Protection degree: IP54
							Dimensions: Width (W) * Depth (D) * Height (L)				850 * 1010 * 1500mm
Figure 2							◎ HNGR6.3-400-9.09-10-23
							Rated Voltage: 6.3/√ 3KV
							Fault current: 400A
							Rated resistance: 9.09 Ω
							Rated time: 10S
							Protection degree: IP23
							Dimensions: Width (W) * Depth (D) * Height (L)				900 * 1300 * 1800mm
Figure 3							◎ HNGR10.5-1000-6.6-10-54
							Rated Voltage: 10.5/√ 3KV
							Fault current: 1000A
							Rated resistance: 6.06 Ω
							Rated time: 10S
							Protection degree: IP54
							Dimensions: Width (W) * Depth (D) * Height (L)				900 * 1010 * 2000mm
Figure 4							◎ HNGR10.5-400-10-10-33
							Rated Voltage: 10.5/√ 3KV
							Fault current: 400A
							Rated resistance: 15 Ω
							Rated time: 10S
							Protection degree: IP33
							Dimensions: Width (W) * Depth (D) * Height (L)				1600 * 2200 * 2400mm
Figure 5							◎ HNGR35-1300-16.5-10-33
							Rated Voltage: 35/√ 3KV
							Fault current: 1300A
							Rated resistance: 16.5 Ω
							Rated time: 10S
							Protection degree: IP33
							Dimensions: Width (W) * Depth (D) * Height (L)				1600 * 2600 * 2400mm

Application environment:

The usage environment of FNGR neutral point grounding resistor shall comply with the specifications of DL/T593-2006 3.1

Indoor: ambient air temperature: 40 ℃～ -25 ℃;
Altitude: ≤ 3000m
Minimum nominal creepage distance: not less than 18mm/kV for porcelain, not less than 20mm/KV for organic materials
Outdoor: ambient air temperature: 40 ℃～ -35 ℃;
Altitude: ≤ 3000m
Minimum nominal creepage distance: Grade II, Grade III 25mm/kV, Grade IV 31mm/kV.
Note: When exceeding normal usage conditions, it shall be determined through negotiation between the user and the manufacturer.

Performance characteristics:

• Unique steel grating structure design: convenient for heat dissipation;
  

• The thermal capacity of a resistor is large: through unique processing technology, the rated power of a single resistor can reach 1200 watts
  

• Small resistance deviation: The manufacturing tolerance of the resistor can be less than ± 5%
  

• The resistance value of the resistor can be adjusted in a wide range: a single chip range of 0.005-11.7 Ω;
  

• Strong insulation performance of the resistor: the resistance BANK can withstand a voltage of up to 8.3kV with the support component;
  

• When in hot state, the change rate of resistance value is small: the resistance piece is made of imported stainless steel material from abroad, with a low temperature coefficient, and the change rate of resistance value in hot state can not exceed 20%;
  

• Strong seismic resistance: The resistance pieces are connected by stainless steel bolts, which has strong seismic resistance;
  

• Strong corrosion resistance: The resistor is made of high-temperature alloy material, which has extremely strong corrosion resistance;
  

• High cost-effectiveness: compact structure, adjustable number of resistors, high cost-effectiveness.
  

Model Description: