绝缘条件指导.pptVIP

Example 1 Example 2 for Class I PWB Example 4 Example 5 Working Voltage higher than AC mains rated voltage Example 6-Shielding of Secondary circuit with GND Trace Example 7- Slot Inside the PWB between Primary and Secondary * Safety Insulation Requirement According to IEC60950 PSBG-Safety 1.絕緣的分類等級 2.工作電壓的測量與絕緣要求的關係 3.絕緣距離的定義與判斷準則 4.IEC60950及IEC60065絕緣要求的同異處 5.變壓器基本要求 1.2.9 Insulation 1.2.9.1 FUNCTIONAL INSULATION: Insulation that is necessary only for the correct operation of the equipment. 功能絕緣:可讓設備能正常動作的絕緣等級 NOTE–FUNCTIONAL INSULATION by definition does not protect against electric shock. It may, however, reduce the likelihood of ignition and fire. (此絕緣要求有三種基本原則可以達到,只要三者符合其一即可) 5.3.4 Functional insulation(功能絕緣的三項要求) For FUNCTIONAL INSULATION, CLEARANCES and CREEPAGE DISTANCES shall satisfy one of the following requirements a),b) or c). a)They meet the CLEARANCE and CREEPAGE DISTANCES requirements for FUNCTIONAL INSULATION in2.10;or 符合距離要求 b)they withstand the electric strength tests for FUNCTIONAL INSULATION in 5.2.2;or 符合Hi-Pot要求 c)they are short-circuited where a short-circuit could cause: ?overheating of any material creating a risk of fire, unless the material that could be overheated is FLAMMABILITYCLASSV-1or better,or ?thermal damage to BASIC INSULATION, SUPPLEMENTARY INSULATION or REINFORCED INSULATION,thereby creating a risk of electric shock. Compliance criteria for 5.3.4c) are in 5.3.8. 符合短路測試的安全要求 1.2.9.2 BASIC INSULATION: Insulation to provide basic protection against electric shock. 基本絕緣除了必須符合Hi-Pot要求外,在距離上(Insulation Distance)也必須符合要求 1.2.9.3 SUPPLEMENTARY INSULATION: In dependent insulation applied in addition to BASIC INSULATION in order to reduce the risk of electric shock in the event of a failure of the BASIC INSULATION. 降低電擊危險的追加絕緣,一般應用在雙重絕緣中,與基本絕緣搭配使用 1.2.9.4 DOUBLE INSULATION: Insulation comprising both BASIC INSULATION and SUPPLEMENTARY INSULATION. 雙重絕緣 1.2.9.5 REINFORCED INSULATION: A single insulation system which provides a degree