Three-phase overvoltage protection (three-phase modular surge arrester)

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Three-phase overvoltage protection (three-phase modular surge arrester)

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Explanation

Three-phase overvoltage protection (three-phase modular surge arrester) is used to protect against over-voltage electrical equipment insulation protection of electrical hazards, is a new type of arrester, which is characterized in limiting overvoltage between phase while , and the effective phase overvoltage limit, which is common arrester can not be done. Protection of the vacuum switch is widely used in the rotating electric machine, parallel compensation capacitor, power plants, substations, etc., this combination is incorporated inside the protection capacity of zinc oxide varistor as the main component, it has good absorption of volt-ampere characteristics and overvoltage the ability of the protective equipment to provide reliable protection, by the power system are welcome.

Implementation of standards

This product implementation GB GB11032-2000 "metal oxide surge arresters without gaps for AC", JB/T10496-2005 "AC three-phase modular metal oxide surge arresters without gaps", ZBK49005-90 "ac systems with series MOA ", JB/T8459-1996" arrester Model methodology. "

Structural features

A novel structure unique four star connection components, technical performance, insulation resistance, high pressure, greatly reducing the use of space utilization and;
2, integrally molded composite jacket, has a good seal, explosion-proof, moisture resistant, anti-leakage trace, anti-corrosion, stain resistance, water repellency is good;
3, high voltage cable, ensure dielectric strength, flexible installation;
4, small size, light weight, saving land, particularly suitable for installation in a variety of switch cabinet (our unique product design, can be mounted vertically, but also horizontally.)

Conditions of Use

1, altitude less than 2000M;
2, ambient temperature: -40 ℃ ~ +40 ℃;
3, Power frequency: 48Hz ~ 62Hz;
4, the long-term protection on the applied frequency voltage does not exceed the continuous operating voltage protection;
5, the maximum wind speed does not exceed 35m / s;
6, earthquake intensity of 7 degrees and the following areas;

Use the Select

         The Three-phase overvoltage protection device is divided into a series with no gap and gap-type, the use of a difference is: no gap for over-voltage protection, as long as the system has over-voltage, can be well absorbed and inhibition; while gap over voltage protection, over-voltage on the system only energy reaches the breakdown voltage protection device in series so that the discharge gap, a gap-type over-voltage protection will be action.
        Therefore, in the selection of the recommended user: select None under normal conditions gap overvoltage protection, system disturbances voltage is too large or frequent division switch places choose gap overvoltage protection is appropriate.
        In order to facilitate the customer's various applications, our company has invested a large development efforts, developed a variety of combined over-voltage protection and ancillary equipment for users to choose.

Ordinary
3 ~ 35kV gapless type (indoor type and outdoor type) Three-column (B type), four-poster (A type)	3 ~ 35kV a gap-type (indoor type and outdoor type) Three-column (B type), four-poster (A type)
Standard cable length: 6 ~ 10kV: phase component 400mm Earth element 500mm 35kV: phase component 550mm Earth element 800mm * Cable extension when ordering * Outdoor unworthy of high-voltage cables, for when ordering.
With phenotypes (characteristic suffix letter "B")
3 ~ 35kV indoor type overvoltage protector base inlaid miniature discharge counter (model suffix characteristic letter "BF") 3 ~ 35kV indoor type voltage protection and over-voltage detector combined with (panel mounting, also shows the year, month, day, hour, minute, and the relative number of operations, 30 sets of data stored in computer chips. (Part number suffix features the letters "BJ") 3 ~ 35kV outdoor voltage protection and over-voltage line monitoring of incidental or discharge counter (model suffix characteristic letter "BJ" or "BF")
Explosion-proof (characteristic letter suffix "KY") High capacity type
Explosion-proof over-voltage protection (indoor type and outdoor type) in over-voltage protection fault in the installation from the device, when the over-voltage protection device fails fails, the protector from the device and the system automatically de-brain, to avoid explosion . Overvoltage protection and explosion-proof supporting the counter is JSZ-8 fault indication type discharge counter, it can give the normal and fault indication. High-capacity type can withstand 600 ~ 800A square wave flow capacity.

Model comparison table

Currently Three-phase overvoltage protection device is in the older models with the national standard JB/T8459-1996 "arrester Model Methods" models of the transitional period, in order to facilitate the majority of users of the products purchased reasonable selection, avoid the use of misunderstanding the product, the company now two models and uses listed in the table for the user to refer to the use.

	System voltage kV	National Standard Model	At present the common part of the old models	Use of the product spaces Outdoor suffix "W"
No gap	6	HY5WZ-10/27×2	TBP-A- TCB-Z- TDP-A- TBP-O- TBP-B- TCB-R- TDP-B- TBP-C- TCB-D- TDP-C- BOD-A- KY2-A- BOG-A- BOD-B- KY2-B- BOG-B- BOD-C- KY2-C- BOG-C- DGB-S- JPBHY5CZ1- DGB-M- JPBHY5CZ2- DGB-R- DGB-Z- High capacity type：BSTG SKB	Station type
	10	YH5WZ-17/45×2
	35	YH5WZ-51/150×51/134
	6	YH5WR-10/27×2		Parallel compensation capacitor bank
	10	YH5WR-17/45×2
	35	YH5WR-51/150×51/134
	6.3	YH2.5WD-8/25×8/19		Electric motor	Protection of rotating electrical machines
	10.5	YH2.5WD-13.5/38.7×13.5/31		Electric motor
	6.3	YH5WD-8/25×8/19		Generator
	10.5	YH5WD-13.5/38.7×13.5/31
	13.8	YH5WD-17.5/53×17.5/40
	6.3	YH1.5WD-4.8/12		Motor neutral point
	10.5	YH1.5WD-8/19		Motor neutral point
Gap	6	YH5CZ-7.6/22×2		Station type
	10	YH5CZ-12.7/38×2
	35	YH5CZ-51/116×2
	6	YH5CR-7.6/27×2		Parallel compensation capacitor bank
	10	YH5CR-12.7/38×2
	35	YH5CR-51/116×2
	6.3	YH2.5CD-7.6/17×2		Generator	Protection of rotating electrical machines
	10.5	YH2.5CD-12.7/29×2		Generator
	6.3	YH5CD-7.6/17×2		Motor neutral point
	10.5	YH5CD-12.7/29×2
	13.8	YH5CD-17.5/36×2
	6.3	YH1.5CD-4.8/8.5		Motor neutral point
	10.5	YH1.5CD-8/12		Motor neutral point

No gap overvoltage protection Specifications

System rated voltage kV	Protection rated voltage kV	Wiring	Continuous operating voltage	DC reference voltage U1mA ≮kV	Frequency reference voltage ≮kV	Residual voltage at nominal discharge current ≯kV	2msSquare-wave current impulse withstand ≮kV	Remark
6	10	Phase - phase	8.0	15.0	11.5	27	200	Station type
		Phase - ground		14.4	10.0	27
10	17	Phase - phase	13.6	25.0	18.0	45	200
		Phase - ground		24.0	17.0	45
35	51	Phase - phase	40.8	88.0	59.0	150	200
		Phase - ground		73.0	51.0	134
6	10	Phase - phase	8.0	15.0	11.0	27	400	Parallel compensation capacitor bank
		Phase - ground		13.8	10.0	27
10	17	Phase - phase	13.6	25.0	18.0	45	400
		Phase - ground		23.0	17.0	45
35	51	Phase - phase	40.8	88.0	59.0	150	400
		Phase - ground		73.0	51.0	134
6.3	8.0	Phase - phase	6.9	15.0	10.0	23.3	400	Rotary motor protection
		Phase - ground		11.3	8.0	18.7
10.5	13.5	Phase - phase	11.5	24.0	16.5	38.7	400
		Phase - ground		18.9	13.5	31
6.3	8.0	Phase - phase	6.9	15.0	10.0	23.3	400	Protection of rotating generators
		Phase - ground		11.3	8.0	18.7
10.5	13.5	Phase - phase	11.5	24.0	16.5	38.7	400
		Phase - ground		18.9	13.5	31
13.8	17.5	Phase - phase	13.8	26.0	21.5	53	400
		Phase - ground		21.0	17.5	40
6.3	4.8	Phase - ground	3.8	6.8	4.8	12	250	Motor neutral point protection
10.5	8.0	Phase - ground	6.4	11.4	8.0	19	250

Gap-type over-voltage protection Technical parameters

System rated voltage kV	Arrester rated voltage kV	Wiring	1.2/50μs Impulse discharge voltage ≯kV	Frequency discharge voltage ≮kV	Residual voltage at nominal discharge current ≯kV	2ms Square-wave current impulse withstand ≮kV	Remark
6	7.6	Phase-phase	24.0	16.0	24.0	400	Station type
		Phase-ground
10	12.7	Phase-phase	41.0	26.0	41.0	400
		Phase-ground
35	42	Phase-phase	124.0	80.0	124.0	400
		Phase-ground
6	7.6	Phase-phase	24.0	16.0	24.0	400	Parallel compensation capacitor bank
		Phase-ground
10	12.7	Phase-phase	41.0	26.0	41.0	400
		Phase-ground
35	42	Phase-phase	124.0	80.0	124.0	400
		Phase-ground
6.3	7.6	Phase-phase	18.7	15.0	18.7	400	Rotary motor protection
		Phase-ground
10.5	12.7	Phase-phase	31.0	25.0	31.0	400
		Phase-ground
6.3	7.6	Phase-phase	18.7	15.0	18.7	400	Protection of rotating generators
		Phase-ground
10.5	12.7	Phase-phase	31.0	25.0	31.0	400
		Phase-ground
6.3	4.8	Phase-ground	12.0	9.0	10	250	Motor neutral point protection
10.5	8.0	Phase-ground	19.0	15.0	16