1321891 九、發明說明： 【發明所屬之技術領域】 本發明涉及一種交流電源插座分壓電路，尤係一種 用於電子探測儀器内部之交流電源插座分壓電路。 【先前技術】 交流電源系統之插頭與插座規範有兩大類：國際電 工委員會（IEC)規範與電子製造商聯盟（NEMA)規 範。交流電源又以110V和220V最爲常見，110V爲單 相兩線加地（1 Φ 2W+G/火線LINE_110V，中性線 NEUTRAL，地線GND )，而220V依電壓生成方式分爲 單相兩線加地（10 2W+G/火線LINE_220V，中性線 NEUTRAL，地線GND )與單相三線（1 Φ 3W /火線 L1-LINE_110V，火線 L2-LINE_110V，中性線 NEUTRAL)兩類，單相三線（ΐΦ3λ¥)之兩條火線之 輸出電壓均爲110V，但其相位相反，因此總電壓輸出 仍爲220V。 雖然世界各國都依據IEC規範與ΝΕΜΑ規範定義 各自之電壓、插頭與插座規格，但是因爲插頭與插座種 類繁多或操作人員之配線失誤，容易造成火線與中性線 之配線錯誤，或者發生220V電壓系統單相兩線加地（1 Φ 2W+G )與單相三線（1 Φ 3W )插座混用等情況，這 種失誤對電源需求不嚴格之一般用電器不會産生較大 影響，但是火線和中性線之配線錯誤會造成用電器金屬 表面帶電等危害，尤其對於電源要求較嚴格之電子探測 儀器等，會造成儀器内部電壓測量電路燒毀等嚴重危 害。 通常電子探測儀器之電源插座電路均要利用分壓 電阻器或變壓器將輸出電壓降低到内部電壓測量電路 中晶片可允許之電壓範圍内，以保證儀器之正常工作。 6 1321891 參考第一圖，係習知電子探測儀器中交流電源插座 分壓電路之電路圖，該交流電源插座分壓電路10包括 一火線埠L、一中性線埠N、一地線埠G、兩分壓電阻 器Ra和Rb、一取值電阻器Rc及兩電壓輸出埠V+和 V-，該分壓電阻器Ra和Rb及取值電阻器Rc依次串聯 於該火線埠L與中性線埠N之間，該電壓輸出端V+連 接於該分壓電阻器Rb與取值電阻器Rc之間，該電壓輸 出端V-與該中性線埠N連接，該地線埠G接地，該分 壓電阻器Ra和Rb及該取值電阻器Rc之電阻值滿足公 式：Ra+Rb>>Rc，使電壓大部分落在分壓電阻器Ra和 Rb上，該電壓輸出端V+輸出之電壓即爲該交流電源插 座分壓電路10之輸出電壓，藉此，透過改變分壓電阻 器Ra和Rb及取值電阻器Rc之電阻值即可取得所需之 輸出電壓。 習知之電子探測儀器一般使用該交流電源插座分 壓電路10,其只能配合插座與單相兩線加地（1Φ 2W+G) 110V或220V電源插頭連接，而不能與單相三線（1Φ 3W) 220V插頭連接，若在使用中將插頭與插座搭配錯 誤，就會造成探測儀器無法正常工作，甚至使電子探測 儀器之金屬外殼帶電，不但威脅人身安全，而且會燒毁 儀器内部電壓探測電路之晶片，造成儀器之損壞。 【發明内容】 鑒於以上内容，有必要提供一種可相容兩種不同規 格電源之交流電源插座分壓電路。 一種交流電源插座分壓電路，其包括一火線埠、一 中性線埠、一地線埠、一對電壓輸出埠、一第一分壓模 組及一第一取值電阻器，該第一分壓模組與該第一取值 電阻器串聯於該火線埠與該地線埠之間，其中一電壓輸 出埠連接於該第一分壓模組與第一取值電阻器之間，該 7 1321891 埠接地，該交流電源插座分壓電路還包括—第二八 ίϊ組和一第二取值電阻器，該第二分壓模組與第二i 埂接於5亥弟一刀壓杈組與第二取值電阻器之間。 上述交流電源插座分壓電路不但能夠配合 J加地，2叫11〇ν*22〇ν電源插頭使用，2 二以相容單相三線（1(J)3W) 22〇ν插頭，避免因插頭 匹配而導致電子探測儀器内部電路燒毀等問 、 【實施方式】 參照第二圖，係本發明交流電源插座分壓電路齡 、，方式之電路圖，該交流電源插座分壓電 -火線埠L1、一中性線淳_、一地線二20包括 J輪出埠V+和V-、一第一分壓模組22a、丄 該第-分壓模組22a與該第一取值 阻器 於該火線埠L1與該地線埠G/N之間，該°八串聯 22b與該第二取值電阻器R2串聯^^刀塾模組 ，地線埠G/N之間，該電壓輸出槔與 埠V-連接於該第二分壓模組電壓輸出 R2之間，該地線埠g/N接地。 一取值電阻器 該第一分壓模組22a包括雨虫賊> R4，該第二分壓模組22b包 ^電阻器R3和 恥，該等電阻器R3:括之兩電串： R3+R4=R5+R6，該宽一 *杜雨电阻值滿足公式： 器R2之電阻值相等，該 哭且，R1與第二取值電阻 阻器R1及第二取值^ 〜R6與該第一取值電 RS+R^IU，R5+R^^ R2之電阻值滿足公式： 使用上述交流電源插座分壓電路2〇，當配合插座 8 連接—單相兩線加地 插頭時，該火線埠L1H2tG謂或2肩電源 別對應與該單相兩線加^、f^/L2 K_〇/N分 J源插頭之火線、尹性(2W】G) UOV或220V 電屢，經過第一分愿模c，從而獲取-輸入 後，該第一取值電阻器R ^電阻器R3和似分壓 輪出’透過改變第—取值巧經過電麗輪出琿V+ 之電阻值，即可獲取所及電阻器们和R4 使用上述交流電:n 單相三線㈤ 2刀20’ t配合插座 中性線埠N/L2及地 ，碩時，該火線埠L1、 物）220V插頭之火 工後對$該單相三線" 而獲取-輸入電壓，經3第中性線連接，從 匕22b之電阻器R3〜R6分壓後，、=分髮 ===輸出埠V+輸出 出埠v+之ί出出因因爲該電髮輪 插座分壓電路2〇少^电莹不位相反，因此該交流電、、尼 V-之輸出電壓之和，nm爲該電壓輸出埠v+ 獲取所需及電阻器㈣之電阻值，4 兩線====?〇不但能夠配合舉相 插頭不匹配而導致電j ) =〇v插頭，避4 综上所述，太㈣儀内部電路燒毀等問題。 專利申請。惟，以丄：符=發明專利要件，爰依法提4 舉凡熟悉本案技藝之m ^ ^之較佳實施例$ 效修飾或變化，皆在羑依本發明精神所作之等 _應涵蓋於以下之申請專利範圍内。养1321891 IX. Description of the Invention: [Technical Field] The present invention relates to an AC power socket voltage dividing circuit, and more particularly to an AC power socket voltage dividing circuit for use in an electronic detecting instrument. [Prior Art] There are two main categories of plug and socket specifications for AC power systems: the International Electrotechnical Commission (IEC) Code and the NEMA. AC power is most common with 110V and 220V. 110V is single-phase two-wire plus ground (1 Φ 2W+G/fire line LINE_110V, neutral NEUTRAL, ground GND), and 220V is divided into single-phase two-wire according to voltage generation. Adding ground (10 2W+G/fire line LINE_220V, neutral line NEUTRAL, ground line GND) and single-phase three-wire (1 Φ 3W / fire line L1-LINE_110V, fire line L2-LINE_110V, neutral line NEUTRAL), single-phase three-wire ( The output voltages of the two live wires of ΐΦ3λ¥) are all 110V, but their phases are opposite, so the total voltage output is still 220V. Although countries around the world define their own voltage, plug and socket specifications according to IEC specifications and specifications, but because of the wide variety of plugs and sockets or wiring errors of operators, it is easy to cause wiring errors between the live and neutral lines, or 220V voltage system. Single-phase two-wire plus ground (1 Φ 2W+G) and single-phase three-wire (1 Φ 3W) sockets, etc., this kind of error will not have a big impact on the general electrical appliances whose power supply requirements are not strict, but the fire line and neutral Wiring errors in the wire can cause damage to the metal surface of the electrical appliance, especially for electronic detectors with strict power requirements, which can cause serious damage such as the internal voltage measurement circuit of the instrument. Usually, the power socket circuit of the electronic detection instrument uses a voltage dividing resistor or a transformer to reduce the output voltage to an allowable voltage range of the internal voltage measuring circuit to ensure the normal operation of the instrument. 6 1321891 Referring to the first figure, it is a circuit diagram of an AC power socket voltage dividing circuit in a conventional electronic detecting instrument. The AC power socket voltage dividing circuit 10 includes a fire wire 埠L, a neutral wire 埠N, and a ground wire 埠G, two voltage dividing resistors Ra and Rb, a value resistor Rc and two voltage outputs 埠V+ and V-, the voltage dividing resistors Ra and Rb and the value resistor Rc are sequentially connected in series to the fire line 与L and Between the lines 埠N, the voltage output terminal V+ is connected between the voltage dividing resistor Rb and the value resistor Rc, and the voltage output terminal V- is connected to the neutral line 埠N, and the ground line 埠G is grounded. The resistance values of the voltage dividing resistors Ra and Rb and the value resistor Rc satisfy the formula: Ra+Rb>> Rc, so that most of the voltage falls on the voltage dividing resistors Ra and Rb, and the voltage output terminal V+ The output voltage is the output voltage of the AC power socket voltage dividing circuit 10, whereby the required output voltage can be obtained by changing the resistance values of the voltage dividing resistors Ra and Rb and the value resistor Rc. The electronic detection instrument of the conventional use generally uses the AC power socket voltage dividing circuit 10, which can only be connected with the single-phase two-wire plus ground (1Φ 2W+G) 110V or 220V power plug, and cannot be combined with the single-phase three-wire (1Φ 3W). ) 220V plug connection, if the plug and socket are mismatched during use, the detection instrument will not work properly, and even the metal casing of the electronic detection instrument will be charged, which not only threatens personal safety, but also burns the internal voltage detection circuit of the instrument. The wafer causes damage to the instrument. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide an AC power outlet voltage dividing circuit that can be compatible with two different specification power sources. An AC power socket voltage dividing circuit, comprising: a live wire, a neutral wire, a ground wire, a pair of voltage output ports, a first voltage dividing module and a first value resistor, the first a voltage dividing module and the first value resistor are connected in series between the live wire and the ground wire, wherein a voltage output port is connected between the first voltage dividing module and the first value resistor. The 7 1321891 埠 is grounded, and the AC power socket voltage dividing circuit further includes a second ϊ ϊ group and a second value resistor, and the second voltage dividing module is connected to the second i 于Between the 杈 group and the second value resistor. The above AC power socket voltage dividing circuit can not only be used with J plus ground, 2 is called 11〇ν*22〇ν power plug, 2 is compatible with single-phase three-wire (1(J)3W) 22〇ν plug, avoiding plug According to the second figure, the circuit diagram of the voltage distribution circuit of the AC power socket of the present invention is divided into piezoelectric-hot line a neutral line 淳 _, a ground line 2 20 includes a J wheel exit + V + and V -, a first partial pressure module 22a, the first partial pressure module 22a and the first value resistor Between the live line 埠L1 and the ground line 埠G/N, the °8 series 22b and the second value resistor R2 are connected in series with the 塾 塾 module, the ground line 埠G/N, the voltage output 槔埠V- is connected between the voltage output R2 of the second voltage dividing module, and the ground line 埠g/N is grounded. A first value divider module 22a includes a rain thief > R4, the second voltage divider module 22b includes a resistor R3 and a shame, and the resistors R3 include two strings: R3 +R4=R5+R6, the width-*durain resistance value satisfies the formula: the resistance value of the device R2 is equal, the crying, the R1 and the second value resistor R1 and the second value ^~R6 and the first A value of electricity RS + R ^ IU, R5 + R ^ ^ R2 resistance value meets the formula: Use the above AC power outlet voltage divider circuit 2 〇, when connected with the socket 8 - single-phase two-wire plus ground plug, the fire line埠L1H2tG or 2 shoulder power supply does not correspond to the single phase two lines plus ^, f ^ / L2 K_〇 / N points J source plug of the fire line, Yin (2W) G) UOV or 220V electric repeatedly, after the first After the split mode c, and thus the input-input, the first value resistor R^the resistor R3 and the like-dividing wheel are 'transformed by the first value, and the electric resistance value of the electric switch is 珲V+ Get the resistors and R4 using the above AC: n single-phase three-wire (five) 2 knives 20' t with socket neutral line 埠 N / L2 and ground, when the fire line 埠 L1, material) 220V plug after the fire For the single phase three " And get - input voltage, connected by 3 neutral lines, after the voltage divider R3 ~ R6 of 匕 22b, = = distribution == = output 埠 V + output 埠 v + ί out because of this The electric power wheel socket voltage dividing circuit 2 is less than the opposite, so the sum of the output voltages of the alternating current and the negative V-, nm is the voltage output 埠v+ to obtain the resistance value of the resistor and the resistor (4). 4 Two lines ====? 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 patent application. However, in order to comply with the requirements of the invention, the following examples are included in the following: Within the scope of the patent application. support