... environment (JMB,BJZ,DG,BZ and DM light control transformer) The transformer can work reliably under the following conditions 1.Altitude ... it into use. 4.After switching on, the iron core and coil of transformer will be heated ( but the temperature rise will ... damp. During operation, pay attention to maintaining to ensure the transformer’s service life. Specification and installation size(JMB) (JMB, ...