NDB Technologies CTT Series User Manual page 10

5. Secondary terminals: The secondary (X) terminals will apply a voltage to
the secondary side of the CT under test and will sense the resulting voltage.
Secondary terminals configuration is the main difference between the CTTx5
and CTTx2 models:
a. CTTx5 model: X1, X2, X3, X4 and X5 terminals. Allows to perform tests on
up to five taps CTs.
b. CTTx2 model: X1 and X2 terminals. Allows to perform tests on two taps
CTs.
6. Primary terminals: The primary terminals (H) are connected to the primary
side of the current transformer under test and will measure induced voltage.
7. Burden terminals: The burden terminals are used as an AC current source to
perform CT load burden test.
8. Task bar buttons: Press to navigate between the different tabs.
9. Keypad: Allows to configure test plans, edit names, write notes, print reports,
select test modes, save data, change menus, etc..
10. Menu key: Allows to access the control panel of the CTT.
11. Start Test key: Allows to start or stop a test.
12. Navigation knob: Rotate clockwise or counter clockwise allows to navigate
the menus. Pressing the knob allows to select a field or accept a selection.
The knob is used to control the voltage output when performing CT testing in
manual mode, and current output when performing CT load burden test.
13. Emergency stop button: Shuts down the high voltage output of the device in
case of an emergency. Rotate clockwise to release.
14. Storage bin: Store accessories.
15. RS232 communication port: Allows for transferring test data to a computer.
16. USB-B communication port: Allows for transferring test data to a computer.
17. USB-A communication port: Allows for transferring test data on a USB memory
stick.
18. Thermal printer: Allows to print test reports.
19. High voltage indicator: Turns on when the CTT is applying a voltage to a CT
under test.
C T T S e r i e s - U s e r M a n u a l
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