电弧焊接设备，电源，检查和测试，静外特性记录，测定效率及功率因数，类型测试

6.9 电焊发电机组情况

在使用发电机组的情况下，试验过程遵循法国标准 NF A85-009 6.2.2 中的条款。

6.10 测定效率

6.10.1 测定电焊线路的有效功率

a) 在使用整流器的情况下，由于电流和电压的波动，我们需要使用一个瓦特表。

b) 在其他情况下，提供给焊接电路的功率是由在常规带电电压和焊接电流下的 U₂I₂ 决定的。

6.10.2 测定接收功率

a) 在电源接网以后，接收功率可以借助一个瓦特表直接测量，或者可以使用两个瓦特表（此时，设备使用的是三相交流电）。

b) 在电源没有接网的情况下，可以使用一个损坏的引擎来确定机械功率；或者，如果可能的话，也可以直接测量。

6.11 测定功率因数

在电源被接入输出交流电压的网的情况下，功率因数可以通过测定电流、电压和有效功率直接计算。

6

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IEC publications prepared by the same Technical Committee

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2

SOMMAIRE

TABLE DES MATIÈRES

:current

Foreword

This document (EN 10216-3:2002) has been prepared by Technical Committee EC/TC 29, "Steel tubes and fittings for steel tubes", the secretariat of which is held by UNI.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2002, and conflicting national standards shall be withdrawn at the latest by November 2002.

This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s).

For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.

Other Parts of EN 10216 are:

Another European Standard series covering tubes for pressure purposes is:

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.

5

ISO 657-1 : 1988 (E)

Table 1 — Dimensions and sectional properties of hot-rolled equal-leg angles (concluded)

NOTES

1. Member countries may choose, to be included in their national standards, the sizes which are required to meet their demand.
2. For the angles so chosen, only thicknesses which can be rolled in their mills to meet the demand of the users may be selected from the list of thicknesses corresponding to equal angles in table 1.
3. The sectional area has been calculated using the formula

   S = [l/2 A - l) + 0,214 6 (r_root² - 2r_toe²)] × 1/100

   where
   

   S is the sectional area, in square centimetres;
   

   l is the thickness, in millimetres;
   

   r_root is the root radius, in millimetres;
   

   r_toe is the toe radius, in millimetres;
   

   A is the leg length, in millimetres.

4. Mass is calculated on the basis of density of steel of 7,85 kg/dm³.

   4