EMERSON KJ4001X1-BB1 Digital input card

Content introduction

Transient protection on ac service conductors is accomplished by use of the following.(a) Installation of an ac surge arrester at the facility main service disconnect means. (b) Including surge suppressors as an integral part of equipment at ac power inputs of each critical sub-panel of a facility. (c) Installation of suitable lightning or surge arresters on the primary and secondary of the main station service transformer. (3) Protection against direct lightning strikes for underground cables may be accomplished by use of the following.(a) Completely enclose buried lines in ferrous metal, electrically continuous, watertight conduit. Protect against direct lightning strikes to buried cable by installing a guard wire above the cables or cable duct. A 1/0 AWG bare copper cable laid directly over the protected cables is recommended. At least 25.4 cm (10 inches) should be maintained between the protected cables and the guard wire. For a relatively narrow spread of the cables, 0.9 meters (3 feet) or less, or for a duct less than 0.9 meters (3 feet) wide, only one guard wire cable is necessary.

Company advantages

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Application industry: widely used in metallurgy, oil and gas, glass manufacturing, aluminum, petrochemical, coal mine, paper and printing, textile printing, machinery, electronic manufacturing, automobile manufacturing, tobacco, plastic machinery, electricity, water conservancy, water treatment/environmental protection, municipal engineering, boiler heating, energy, power transmission and distribution, etc.

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