transformer neutral earthing resistors

1.this product can also equipped three-pgase grounding transformer if needed 2. applicable to 6-35kV system

1.About us:

Baoding Tianwei Hengtong Electric company is a domestic professional manufacture of power system neutral grounding equipments and complete implements ISO9001 quality management system. We have a excellent sales performance all over the world and have been exported to more than 40 countries. TWHT offers a complete range of products for the necessary neutral-point connections

 

2.General introduction

THT-ZT neutral grounding resistor cabinet (NGR or NER) are employed in medium-voltage AC distribution networks to limit the current that would flow through the neutral point of a transformer in the event of an earth fault. It connected between the neutral point of the transformer and the earth.

3.Options include:

1)Earthing transformer or grounding transformer

When the transformer windings adopt delta connection and a Zigzag connecting, Grounding transformer needs to be separately installed, the THT-ZT-type neutral grounding resistor cabinet can be matched.

2)Intelligent control units.

It would not only monitor the earth fault and temperature of unbalanced current and resistors, but also record the current value, time, NGR temperature changes and grounding frequency. At the same time, it will transmit the above information to the main control room.

4.specifications:

Ambient temperature: -40C~60°C

Altitude: less than 4000m

Relative humidity: less than 95% (25°C)

Codes and standards: IEEE-32 ,DL/T 780-2001

Rated frequency: 50/60HZ

Location: outdoor/indoor

Enclosure: aluminum-zinc plates, stainless steel plates or cold-rolled steel plates according to your requirements.

Resistor material: stainless steel

Degree of protection: design as required

 

When the transformer windings adopt delta connection and a Zigzag connecting grounding transformer needs to be separately installed, the THT-ZT-type neutral grounding resistor cabinet can be matched

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3.Regular Technical Particulars for reference

Type	Rated Voltage(KV)	Short Time Current(A)	Flow Time (S)	Resistance Value(Ω)	Outer Dimensions
THT-ZT-6/34.64	6	100	10	34.64	1200x1200x1870
THT-ZT-6/17.32	6	200	10	17.32	1200x1200x1870
THT-ZT-6/8.66	6	400	10	8.66	1200x1200x1870
THT-ZT-6/5.77	6	600	10	5.77	1200x1200x1870
THT-ZT-10/14.43	10	400	10	14.43	1200x1200x1870
THT-ZT-10/9.62	10	600	10	9.62	1200x1200x1870
THT-ZT-10/7.22	10	800	10	7.22	1200x1200x1870
THT-ZT-10/5.77	10	1000	10	5.77	1200x1200x1870
THT-ZT-35/20.21	35	1000	10	20.21	2760x2600x2000
THT-ZT-35/10.10	35	2000	10	10.10	2760x2600x2000

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