Document rxrQEojL2E5Z9grY6r1zw3LVv

MITSUBISHI MONSANTO CHEMICAL COMPANY FROM LOCATION DATE SUBJECT REFERENCE Tokyo June 21, 1907 AROCLOR MARKET TECHNICAL SERVICE TO Mr. P. G. Benignus St. Louis, Mo. G. R. Buchanan-St. Louis D. Danna- " W. T. Dickens- " J. R. Durland-Tokyo D. T. Mowry-MJL H. Shironizu- Recently, ve Bade several calls at major potential customers in the electrical field for Aroclor. A lot of questions, as listed in the attachment, were raised by them and they are very anxious to discuss on these questions with you face to face at the time of your visit to Japan. We vould appreciate it, if you would prepare for these questions prior to your departure. We appreciate very much your visit to Japan next month,and ve believe it vlll be a great contribution to the implementation of our Aroclor project. Best regards. /tm A t tachment . (/~W S. Uatsuno Director of Planning DSW 200746 STLCOPCB4058810 MITSUBISHI MONSANTO CHEMICAL COMPANY Questions to Ur. P. 0. Benignus Bhlzukl Electric Co. (Capacitor) 1. Typa and quality of papar used for capacitors in the U.8.? 2. What refining methods are actuality adopted by customer companies in the U.S.? 3. Though some blends of trlehloro-and tetrachloroblphenyl are said to be used in Europe and in the U.S., what are their merits in cost and quality, compared with use of trlehloro-biphenyl or tetrachlorobiphenyl alone? 4. it would be very much appreciated, if a sample of typical paper commonly used for Aroclor and itttatelated data could be available. One roll (about 43m/m x 20m) of the sample will be enough. Toshiba Electric Co. (Capacitor and Transformer) 1. Do you have any data on properties of aslcarel at low temperatures (-45C - -50C), such as electrical and viscosity properties, etc.? 2. Do you have any data on the CL2 absorbing capacity of the stabilizer, PPO, in case of heat deterioration of askarel? 3. Do you have any comparative data on such properties jfas temperature-tan , and others of Pyranol 1467, of which formulation is similar to Toshiba's one, and Inerteen PPO? 4. Are there any better stabilizers than PPO? 5. It would be very helpful to us, if you ootid provide us with one set of testing methods (ASTll) of dielectric fluid. DSW 200747 STLCOPCB4058811 MITSUBISHI MONSANTO CHEMICAL COMPANY Mitsubishi Electric Co. (Transformer) 1. On the standards for maintenance of askarel used for transformers; a) When is the askarel needed to be refined or changed, namely the limit of power factor and volume resistivity of askarel allowed for use? b) What items to be checked and what testing methods do you recommend for periodic fluid inspection? c) Though it is said In the catalogue (P 13), Monsanto ASKAREL Inspection and Maintenance Guide, that heavy contamination (as when arced) does not lower the resistivity below the order of 10 ohm-cm. at 100C, what is the basis for this? d) What do you think about the use and the effect of a heat de-gasing apparatus when filling transformers with askarel? 2. On Additives; Do you have or know any literature on the effects of various additives? 3. On blending of askarel with other askarel or oil; a) Is askarel never permitted to be mixed with mineral oil? Please show the mixing limit, if you can. b) Do you have any data showing the maximum allowance for mixing one type of askarel with another? e) Do you have any data showing the maximum allowance for mixing askarel with cleaning solvents? d) Do you have any refining method of askarel which is used for cleaning (please see page 15 of the catalogue mentioned above)? 4. On power factor, volume resistivity, and dielectric strength of impregnated insulation board; Do yop have any data showing surface flush over voltage and puncture voltage of the insulation material lmmerced fin the askarel with its tan and Heg deteriorated by contamination, and corona starting voltage of the askarel Itself, etc? Does the askarel lose its heat- stability when contamination causes the deterioration of tan and Meg? DSW 200748 STLCOPCB4058812