Zensol Automation Inc.

ZENSOLZENSOLFirst Trip MonitoringFirst Trip Monitoring

In addition to doing timing and motion on circuit breakers, our CBA-

32P instruments are capable of doing on-line first trip monitoring.

Here is an example of a real test in Alabama.

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Zensol Automation Inc.

First Trip MonitoringFirst Trip Monitoring

Real tests in Alabama (USA)Real tests in Alabama (USA)

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Control cabinet

Goal: To show that the CBA-32P is able to to do ON-LINE

testing of breaker first

trip.

Zensol Automation Inc.

First Trip MonitoringFirst Trip Monitoring The challengeThe challenge

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No need to open the No need to open the sectionnor to sectionnor to

isolate the breakerisolate the breaker

When doing first trip monitoring, the breaker is always « on line », which When doing first trip monitoring, the breaker is always « on line », which means that the breaker is not isolated during the test. Connecting the means that the breaker is not isolated during the test. Connecting the

contacts is impossible because the current circulating is too high contacts is impossible because the current circulating is too high (thousands of amps).(thousands of amps).

Contrary to classic timing tests, the trip test must be done without the help Contrary to classic timing tests, the trip test must be done without the help of the CBA-32P contacts.of the CBA-32P contacts.

Zensol Automation Inc.

First Trip MonitoringFirst Trip Monitoring

The solutionThe solution

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The solution is to connect a current transducer directly on the output of the CTs.

The principle is to measure the lowest current (5 amps) to know the evolution of the current and at the same time to guarantee the security of the operators.

Zensol Automation Inc.

First Trip MonitoringFirst Trip Monitoring

Test set-up Test set-up

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0-10 Vcc analog inputs

To do on-line testing, To do on-line testing, To monitor the To monitor the

breaker first trip, the breaker first trip, the current transducer current transducer

will be connected to will be connected to the analog inputs of the analog inputs of

the CBA-32P.the CBA-32P.

Zensol Automation Inc.

First Trip MonitoringFirst Trip Monitoring

The first trip monitoring kit : KIT–Z-FTThe first trip monitoring kit : KIT–Z-FT

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Current Current transducertransducer

Connected to Connected to one of the one of the analog inputs of analog inputs of the CBA-32Pthe CBA-32P

InterfaceInterface

We use a current We use a current transducer working transducer working like a amperemetric like a amperemetric clamp, but clamp, but stronger.stronger.

Zensol Automation Inc.

First Trip MonitoringFirst Trip Monitoring

Installation of the current transducerInstallation of the current transducer

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Current transducersCurrent transducers InterfaceInterface

Extension to Extension to connect the connect the transducer to transducer to the CBA-32Pthe CBA-32P

Zensol Automation Inc.

First Trip MonitoringFirst Trip Monitoring

Easy test procedureEasy test procedure

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• Ground the CBA-32P Ground the CBA-32P

• Connect the optic fiber linkConnect the optic fiber link

• Connect the command Connect the command cable and the current cable and the current transducer onto the control transducer onto the control cabinetcabinet

• Connect the current Connect the current transducer to the analog transducer to the analog inputs of the CBA-32Pinputs of the CBA-32P

• turn on the CBA-32P and turn on the CBA-32P and the CBA WIN softwarethe CBA WIN software

GroundGroundPowerPower Analog inputAnalog input

Command cableCommand cable

Fiber opticFiber optic

Zensol Automation Inc.

First Trip MonitoringFirst Trip Monitoring

Trip testTrip test

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28,60 ms28,60 ms

Zensol Automation Inc.

First Trip MonitoringFirst Trip MonitoringIn this example we only use 1 current transducer which In this example we only use 1 current transducer which measures 1 phase. measures 1 phase.

You can measure the three phases simultaneously, in You can measure the three phases simultaneously, in “one simple click of the mouse”, by connecting three “one simple click of the mouse”, by connecting three current transducers. current transducers.

CBA-32P=

On-line testing of breaker's first trip + Off-line testing (including timing & motion)

All the tests are done according to the international All the tests are done according to the international standards IEC.56.3.105standards IEC.56.3.105