Audited Supplier
Henan Energy Electric Equipment Co., Ltd. was established in 2011 and is an excellent and reliable power equipment manufacturer in China. The company mainly develops and produces oil-immersed transformers, dry-type transformers, box-type substations, high-voltage switches, and medium and low voltage complete sets of equipment. The equipment put into production and operation of the project advocates energy saving, intelligence, informatization, and mechanization. The company has established the Henan Triangle Energy-saving Transformer Engineering Technology Research Center, with 71 utility model patents and 15 invention patents. With years of accumulation in the transformer industry and strong technological innovation capabilities, HZEC products are sold to the Middle East, North America, South America, Europe, Southeast Asia, Africa, and other regions, covering more than 40 countries.
Standards:
IEC 61869-1;IEC 61869-2
GB 20840.1; GB 20840.2
1.It is oil paper insulation structure.The main insulation is wound from high voltage cable paper, and is placed several capacitor screen of voltage division in the primary insulation, which can improve electric field distributing and decrease the consumption of insulation material. It will be immersed with transformer oil after desiccating under vacuum. It has advantages of stable and reliable performance of insulation, rich operated experience, long service life.
2. Perfect fluidity performance of transformer oil is good for heat dissipation,it also has self recover ability for the failure of partial discharge caused by air bubble and dust.
3. The current ratio can be changed easily by switching the connection method of Primary winding to series or parallel.
4. Hermetically sealed stainless steel metallic bellows is installed on the top,which protect the transformer oil from moisture and extend the life time, also there is a oil level gauge on the bellows for observing the change of oil volume.
5. There is a multi function oil drainvalve onthe base,which make it more convenient for sampling,draining.
6. All adopted insulation parts are environmental protection materials.
7. Secondary terminal board is made of epoxy casting,the sealing performance is more reliable.
8. The base uses spray painting or hot galvanizing,which gives a high degree of corrosion resistance.
9. Fasteners and name plate are stainless steel.
| Rated voltage,kV | 66 or 69 | 110 or 115 | 132 or 138 | 50 | 220 or 230 | 330 |
| IIighest voltage for equipment,kV | 72.5 | 123 or 126 | 145 | 170 | 245 or 252 | 363 |
| Rated frequency,Hz | 50 or 60 | |||||
| Rated power frequency withstand voltage,kV | 140/160 | 230 | 275 | 325 | 460 | 510 |
| Rated lightning impulse voltage,kV | 325/350 | 550 | 650 | 750 | 1050 | 1175 |
| Flashover distance,mm | 700 | 1100 | 1300 | 1500 | 2100 | 2350 |
| Cree.distance,mm | W1:1450 W2:1820 W3:2250 | W1:2520 W2:3150 W3:3910 | W1:2900 W2:3630 W3:4500 | W1:3400 W2:4250 W3:5270 | W1:5040 W2:6300 W3:7820 | W1:7260 W2:9075 W3:11253 |
| Mechanical load,N | 3000 | 3000 | 4000 | 4000 | 4000 | 4000 |
| Rated primary current,A | 2500-4000 | |||||
| Rated secondary current,A | 1; 2; 5 | |||||
| Accuracy class | 0.1; 0.2; 0.5; 0.2S; 0.5S; 5P; 10P; PX: | |||||
| Ratedoutput(recommended value),VA | 1A: 10-15VA 2A: 10~15VA 5A: 15~50VA | |||||
| Instrument security factor FS | 5;10 | |||||
| Accuracy limit factors ALF | 10;15; 20; 25; 30; 40 | |||||
| Short-time thermal current(Mas n),kA | 50kA/3s | |||||
| Accuracy class | TPY |
| Rated ratio, A | 2500-4000/1 |
| Rated resistive burden(Rb), VA | 7.5;10;15; 20 |
| Rated symmetrical short-circuit current times (Kssc) | 10;15; 20 |
| Rated primary time constant (Tp) | 40; 60; 80;100 |
| Duty cycle: | C-0.1s-O C-0.1(0.04)s-O C-0.1(0.04)s-0.5s-0.1(0.04)s-O |
1. Ambient temperature:-50ºC- +45ºC
2. Altitude:≤2000m(If above 2000m,the product will be customized according to user's request)
3. Pollution level: II, III, IV.
