... Series illumination transformers: JMB, BJZ, DG, BZ Series Illumination Transformer for AC 50Hz, voltage 500V and below the circuit, machine tools and ... power lights. JMB, BJZ, DG, series transforme r is a transformer by the BK series and protective shell composition, shell on ... the grounding screw used; BZ-type lighting transformer by BK-50, BK-100 Control Transformer, LS3-2-type main switch and the ...