上海能伏機(jī)電設(shè)備有限公司

產(chǎn)品簡介 Product synopsis

適用于發(fā)電機(jī)在運行時發(fā)生單相接地故障，當(dāng)故障點出現(xiàn)弧光接地時會進(jìn)一步擴(kuò)大定子繞組絕緣損害范圍，造成相間或匝間短路。通常發(fā)電機(jī)中性點采用高阻接地。 

It is suitable for single-phase grounding fault of generator during operation. When arc  grounding occurs at the fault point, the insulation damage range of stator winding will be further  expanded, resulting in inter-phase or inter-turn short circuit. Generally, the generator neutral point  is grounded with high resistance.

型號含義 Model meaning

結(jié)構(gòu)特點 Structure feature

1、產(chǎn)品采用不銹鋼材質(zhì)鎳鉻合金或非金屬材質(zhì)，其電導(dǎo)率高，溫度系數(shù)高，較高可耐 1600℃的高溫，穩(wěn)定性好；

2、柜內(nèi)接地變壓器采用干式變壓器，容量大，耐沖擊；

3、專門保護(hù)，避免燒壞發(fā)電機(jī)鐵芯，減輕發(fā)電機(jī)定子繞組接地時鐵芯的損傷；

4、可配置環(huán)氧樹脂澆注干式接地變壓器、零序 CT、單相隔離開關(guān)，電阻器在線監(jiān)測裝置，加熱器以及溫濕度控制器等，可有效監(jiān)控

接地故障電流、電壓，并提供開關(guān)量及報警接點。

1. The products are made of high-quality stainless steel, nickel-chromium alloy or nonmetal material, which has high conductivity, high 

temperature coefficient, high temperature resistance up to 1600℃ and good stability;

2. The grounding transformer in the cabinet adopts dry-type transformer with large capacity and impact resistance;

grounded;

3. Professional protection to avoid burning out the generator core and reduce the damage of the core when the generator stator winding is 

4. Epoxy resin cast dry-type grounding transformer, zero-sequence CT, single-phase isolating switch, resistor online monitoring device, heater 

and temperature and humidity controller can be configured, which can effectively monitor the current and voltage of grounding fault, and provide 

switching value and alarm contact.

技術(shù)參數(shù) Technical parameter

接線原理圖 Wiring schematic

1、發(fā)電機(jī)中性點經(jīng)單相接地高阻接地（如圖 1）

1. The neutral point of the generator is grounded by single-phase grounding with high resistance (as shown in Figure 1)

2、發(fā)電機(jī)中性點直接經(jīng)高阻接地（如圖 2）

2. The neutral point of the generator is directly grounded through high resistance (as shown in Figure 2)

選型參數(shù) Selection Parameters

CT、接地變壓器容量，隔離開關(guān)，智能監(jiān)控器可選，（如帶開關(guān)設(shè)備，通電時間 >10 秒時，箱體尺寸需另外調(diào)整）

CT, grounding transformer capacity, isolating switch and intelligent monitor are optional (if switch equipment is provided, the box size needs to 

be adjusted separately when the power-on time is more than 10 seconds)

注：根據(jù)用戶要求，設(shè)計生產(chǎn)特別參數(shù)的產(chǎn)品。 

Note: Products with special parameters are designed and produced according to user requirements

典型案例 Typical Case