eakage protection devices. B.Control system overload, short-circuit protection device. C.High and low pressure protection and delay startup protection for compressor systems D.Over-temperature protective device.Standard to comply *GB2423.1-89(IEC68-2-1) Environmental Test Methods for Military Equipment--Low Temperature Test*GB2423.2-89(IEC68-2-2) Environmental Testing - Part 2: Test Methods - Tests B: Dry Heat*GB2423.3-93(IEC68-2-3) Basic Environmental Testing Procedures for Electric and Electro