POWER GENERATION & DISTRIBUTION

Power Generation & Distribution

Section 3

​3​POWER GENERATION​& DISTRIBUTION

NYNAS

Transformer oils

Current affairs just got cooler www.nynas.com Keep a cool head when updating solutions for your transformer needs with the help of Nynas naphthenics. We offer the world’s widest range of transformer oils, developed to handle just about every conceivable climate, design and operating condition. TRANSFORMER OILS

Criteria for oil selection suitable for use as insulating liquid in UHV oil filled equipment

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​NYNAS South Africa Pty Ltd​4th Floor, Block E​The Pivot at Monte Casino​No 1 Monte Casino Boulevard, Fourways​Tel: +27 10 590 1052​Fax: +27 86 574 6456​Visit our website: www.nynas.com ​CRITERIA FOR OIL SELECTION SUITABLE FOR USE AS INSULATING LIQUID IN UHV OIL FILLED EQUIPMENT​Mineral insulating oil is used for cooling and insulation in transformers since over […]

Criteria for oil selection suitable for use as insulating liquid in UHV oil filled equipment

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​NYNAS South Africa Pty Ltd​4th Floor, Block E​The Pivot at Monte Casino​No 1 Monte Casino Boulevard, Fourways​Tel: +27 10 590 1052​Fax: +27 86 574 6456​Visit our website: www.nynas.com ​Figure 1; Effect of viscosity on cooling efficiency of insulating oil ​Response to inhibitor is very important issue for service life of oil and super grade oil […]

IEC 60947 - safety and performance standard for low voltage switchgear & control gear

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​IEC 60947 – SAFETY AND PERFORMANCE STANDARD FOR LOW VOLTAGE SWITCHGEAR & CONTROL GEAR​1.0 The International Electrotechnical Commission​The International Electrotechnical Commission(IEC) is a not-for-profit, non-governmental international standards organization that prepares and publishes International Standards for all electrical, electronic and related technologies – collectively known as “electrotechnology”. IEC standards cover a vast range of technologies from […]

Kraus & Naimer

Disconnectors for Photovoltaic

DISCONNECTORS FOR PHOTOVOLTAIC DC APPLICATIONS​A growing requirement for DCswitch disconnectors for solar photovoltalic (PV) ​power supply systems has motivated Kraus & Naimer to introduce a brand new range of disconnectors specifically designed for this Particular DC  application. ​Reliable Kraus & Naimer main switches ensure safe  operation.​With rated operational currents from 16 amps to 64 amps and voltages from 80 to […]

IEC 60947 - safety and performance standard for low voltage switchgear & control gear

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Switches Disconnectors ​Switch – disconnectors ​>Switches:​Are used for making, carrying & breaking current:​Under normal service conditions.Under specified overload conditions.Control device only and cannot be utilized as a safety isolator.​>Disconnector:​The disconnector (figure 1). complies with the isolating function in the open position and is used for:​Carrying current.Making & breaking negligible currents.Always with a late make early […]

IEC 60947 - safety and performance standard for low voltage switchgear & control gear

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​Figure 3. A safety switch cannot be locked in the ON position​3.2 3F Operator torque test​Contact furthest from the actuation device is welded closed. 3 times normal operational hand torque is applied to switch. The handle must NOT appear to be in the OFF position and must not be able to be locked. When the […]

Industrial lead acid batteries: types and their selection

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​P.O. Box 5015Benoni South1502Tel: 011 741 3600Fax: 011 421 2642Web: www.battery.co.za ​INDUSTRIAL LEAD ACID BATTERIES: TYPES AND THEIR SELECTION​1. Basic theory of lead acid batteries​Refer figure 1 below:​The lead acid battery comprises of two chemically dissimilar lead based plates in a dilute sulphuric acid solution.  The positive plate contains lead dioxide PbO2, and the negative […]

Industrial lead acid batteries: types and their selection

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​P.O. Box 5015Benoni South1502Tel: 011 741 3600Fax: 011 421 2642Web: www.battery.co.za ​3. Application features of various battery types​3.1 Common features​The following features apply to all lead acid batteries, irrespective of their type.​a. The ampere hour capacity in a battery depends on its discharge rate. The higher the current, the less the capacity and vice versa. […]

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