ASTM C109/C109M-13e1 pdf free.Standard Test Method for Compressive Strength of Hydraulic Cement Mortars. 3. Summary of Test Method 3.1 The mortar used consists of I part cement and 2.75 parts of sand proportioned by mass. Portland or air-entraining portland cements are mixed at specified water/cement ratios. Water content for other cements is that sufficient to obtain a flow of 110...
ASTM C143/C143M-10 pdf free
ASTM C143/C143M-10 pdf free. Standard Test Method for Slump of Hydraulic-Cement Concrete. ASTM C143/C143M covers determination of slump of hydraulic-cement concrete, both in the laboratory and in the field. The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in...
ASTM D4318-10e1 pdf free
ASTM D4318-10e1 pdf free.Standard Test Methods For Liquid Limit, Plastic Limit, And Plasticity Index Of Soils. These test methods cover the determination of the liquid limit, plastic limit, and the plasticity index of soils as defined in Section 3 on Terminology. The methods described herein are performed only on that portion of a soil that passes the 425-μm (No. 40)...
ASTM D445-15 pdf free
ASTM D445-15 pdf free.Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity). ASTM D445 specifies a procedure for the determination of the kinematic viscosity, ν, of liquid petroleum products, both transparent and opaque, by measuring the time for a volume of liquid to flow under gravity through a calibrated glass capillary viscometer. The...
IEEE C37.38-1989 pdf free
IEEE C37.38-1989 pdf free.IEEE Standard for Gas Insulated, Metal-Enclosed Disconnecting, Interrupter, and Grounding Switches. 1.1 Scope IEEE C37.38 applies to switches rated 72.5 kV and above intended for use in metal-enclosed, gas-insulated substations, including disconnecting, interrupter, and grounding switches. These switches are characterized by grounded. leak-tight metal enclosures that are tilled with a gas (most commonly sulfur hexa-tluoride, SF6) at...
IEEE 120-1989 pdf free
IEEE 120-1989 pdf free.IEEE Master Test Guide for Electrical Measurements in Power Circuits. 1.1 Purpose It is the purpose of this guide to give instructions for those measurements of electrical quantities that are commonly needed in determining the performance characteristics of electric machinery and equipment. The choice of the measurement method and instrument systems to be used depends on the...
IEEE C37.90-1989 pdf free
IEEE C37.90-1989 pdf free.IEEE Standard for Relays and Relay Systems Associated with Electric Power Apparatus. Abstract: ANSI/IEEE C37.90-1 989, IEEE Standard for Relays and Relay Systems Associated with Electric Power Apparatus, applies to relay systems that protect and control apparatus that generate, distribute and use electrical power. This standard defines service conditions and specifies relay performance requirements and performance information...
IEEE C37.121-1989 pdf free
IEEE C37.121-1989 pdf free.American National Standard for Switchgear - Unit Substations - Requirements. This standard covers the requirements for three-phase unit substations for step-down operation in the range of 112.5 kVA through 10 (XX) kVA at primary voltages of 601 volts through 38 kilovohs. 1.2 IEEE C37.121 is intended for use as the basis for the coordination of equipment by...
IEEE C62.92.2-1989 pdf free
IEEE C62.92.2-1989 pdf free.IEEE Guide for the Application of Neutral Grounding in Electrical Utility Systems, Part II - Grounding of Synchronous Generator Systems. 1.1 Scope. This section summarizes the general considerations in grounding synchronous genera tor systems and discusses the factors to be consid ered in the selection of a grounding class and the application of grounding methods. The guidelines...
IEEE C62.1-1989 pdf free
IEEE C62.1-1989 pdf free.IEEE Standard for Gapped Silicon-Carbide Surge Arresters for AC Power Circuits. Abstract: IEEE C62.1-1989, IEEE Standard for Gapped Silicon-Carbide Surge Arresters for AC Power Systems, describes the service conditions, classifications and voltage ratings, design tests with corresponding performance characteristics, conformance tests, and certification test procedures for station, intermediate, distribution and secondary class arresters. Terminal connections, housing leakage...