Delta 4000 Instruction Manual download pdf (Page 71)

Delta 4310 User Interface

81331 Rev 01 Nov 2010

Tests 22 to 24 - These are tests of oil samples taken from each phase of the

breaker (either 1 or 3). Each sample of oil is tested separately in an accessory oil

test cell. Follow oil cell instructions for details on cell cleaning and filling.

Record the temperature of the oil sample in the Nameplate section at the top of

the form. Test mode is UST-R.

92520 - SF6 Dead Tank Circuit Breaker form

Basic Form Information

The PF SF6 Dead Tank Circuit Breaker form is used for power factor testing

medium and high voltage SF6 circuit breakers. These are typically found in

outdoor transmission and distribution substation applications. Dead tank circuit

breakers are those whose high voltage interrupting chamber is housed in an earth

grounded enclosure or tank.

SF6 dead tank circuit breakers occasionally utilize condenser bushings with test

taps which should be routinely tested whenever the overall insulation of the

breaker is tested. If so equipped, all bushing nameplate information should be

documented on the test form.

Test modes are mentioned in the description of tests below. However, the test

form is pre-programmed with the appropriate test modes to automatically be

performed.

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Delta 4000 Instruction Manual Page 71