SCADA & SOE PAIR CABLE

Pair cable shield wire should be grounded at one side for Analog points
to avoid the error in the reading and out side noises effects.

HI - POT LEAKAGE CURRENT

How to calculate the Hi-pot leakage Current?

I = U X 2пcf

U = Applied voltage
c = Total capacitance = Instrument Capacitance + Circuit Capacitance
f = Frequency applied = 1/2п√CL

Note: Circuit Capacitance can measure with IR value measurement kit.

VACUUM IS A CONDACTOR

Vacuum will become a conductor in some potential stage.So don't do any
electrical test in equipment

CT CONNECTION TIPS

CT CONNECTION TIPS

1.For Bus section and Bus coupler The CT "P1" should be Breaker Side

CT METERING CORE STAR POINT

CT Star point connection for metering core should be towards line or cable or transformer side.

In energy meter IMPORT reading should be -ve sign
EXPORT reading should be +ve sign

In line feeder power towards bus and current develop 180 dec displaced and
Energy meter shows -ve reading.(Power inter in earthing point side P2 side)

In cable feeder power outwards to bus and current develop 0 dec displaced and
Energy meter shows +ve reading.(Power inter in side P1 side)