Abstract: A portable apparatus for voltage transformation is capable of temporarily augmenting a power transformer. A transformer with a first medium voltage primary winding, a second medium voltage primary winding and a low voltage secondary winding is selectably coupled to a plurality of medium voltage electrical power input couplings capable of temporarily coupling with medium voltage power on a plant. An interlocked switch selectably couples the medium voltage electrical power input couplings to the medium voltage primary windings of the transformer such that only one medium voltage primary winding of the transformer is coupled at a time to the medium voltage electrical power input couplings. The interlocked switch can use a captive key system to prevent more than one secondary winding from being simultaneously connected. Medium voltage circuit protection devices such as fuses are included.

Abstract: A portable apparatus for voltage transformation is capable of temporarily augmenting a power transformer. A transformer with a first medium voltage primary winding, a second medium voltage primary winding and a low voltage secondary winding is selectably coupled to a plurality of medium voltage electrical power input couplings capable of temporarily coupling with medium voltage power on a plant. An interlocked switch selectably couples the medium voltage electrical power input couplings to the medium voltage primary windings of the transformer such that only one medium voltage primary winding of the transformer is coupled at a time to the medium voltage electrical power input couplings. The interlocked switch can use a captive key system to prevent more than one secondary winding from being simultaneously connected. Medium voltage circuit protection devices such as fuses are included.

Abstract: This invention relates to the improvement of rubber-to-metal adhesion and adhesion retention in sulfur vulcanizable, metal reinforced rubber compositions via the use of substituted pyrimidine and triazine adhesion promoters of Structure (I). ##STR1## wherein A is N or C-H, X, Y and Z are independently selected from the group consisting of chloro, ##STR2## wherein R.sub.1 may be hydrogen, chloro, acyl, or C.sub.1 -C.sub.12 alkyl; R.sub.2 may be hydrogen, C.sub.1 -C.sub.12 alkyl, chloro, hydroxy, alkoxy, or anilino; R.sub.3 may be hydrogen, C.sub.1 -C.sub.4 alkyl or phenyl; R.sub.4 may be hydrogen, C.sub.1 -C.sub.8 alkyl, cyclohexyl, C.sub.1 -C.sub.12 hydroxylalkyl, or C.sub.1 -C.sub.12 alkoxyalkyl; R.sub.5 may be hydrogen, C.sub.1 -C.sub.4 alkyl, cyclohexyl, or C.sub.1 -C.sub.12 hydroxyalkyl; with the proviso that Z may not be chloro when both X and Y are chloro.

Abstract: This invention relates to the improvement of rubber-to-metal adhesion and adhesion retention in sulfur vulcanizable, metal reinforced rubber compositions via the use of certain phenylenediamino substituted chloropyrimidine and chlorotriazine adhesion promoters.