Deni 5300 Specifications Page 19
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5 - CT/PT Installation5 - CT/PT Installation
5 - CT/PT Installation5 - CT/PT Installation
5 - CT/PT Installation
External current and potential transformers can be used
to extend the measuring ranges of the PA. See Section
4, Figure 6 for a connection diagram.
CALIBRATION
The 5300 has special provisions allowing entry of
transformer ratios into the non-volatile RAM via the
GPIB (IEEE-488) rear panel input. The PA display
then includes the transformer ratios and reads actual
current, voltage and power directly.
CT/PT DETECTION
At power turn on initialization, the MPU interrogates
that portion of memory where the CT and PT
compensation values reside. If a value is found, the MPU
looks to see if the rear panel CT/PT slide switch (see
Figure 12) is set to the "IN" position (to include the
transformer ratios). If it is, normal calibration factors
are revised by applying the transformer factors. The
displays indicate actual load values.
Figure 12. Current & Potential Transformer Selections
IN
OUT
GND
EXT
CT/PT
Since the above interrogation and scale factor setup
occurs only at power turn on, the scale factors are active
until power is turned off, the CP/PT switch turned to
"OUT" and power turned "ON." The CP/PT factors
are now removed and the standard factory calibration
factors become active.
CT/PT RATIO RANGE
The 5300 PA compensates all display values for
transformer ratios from 0.01 to 255.
DIGITAL RANGE
The digital display holds four digits for AMPS and
VOLTS, and five digits for WATTS or KW. When a
value exceeds these limits, the decimal point is turned
off. This is a warning that the compensated value is
above the display capability and is in error. If this should
occur during GPIB use, an exclamation mark is
substituted immediately to the right of the least
significant digit (i.e. !=ASCII033) to signal that there
is an unknown magnitude.
GPIB-CT/PT PROGRAMMING
The 5300 PA accepts either upper or lower case
characters, and whole numbers in any numerical format.
For CT installation: CTnnncl
For PT installation: PTnnncl
Where: nnn=0.01 to 255.
("cl" denotes a carriage return/line feed termination
character.)
For example:
A CT with 250:1 ratio is: CT250.cl
A PT with 10:1 ratio is: PT10.0ct
The PA will ignore any value outside of the range of
0.01 to 255. If an out of range entry is attempted, the
display will warn by showing "HELP." Correct and re-
enter your factor.
- Model 5300Model 5300 1
- Model 5300 1
- MAGTROL, INC.MAGTROL, INC 2
- MAGTROL, INC 2
- 1 - Introduction 7
- Chapter 1 - Introduction 8
- 2 - Specifications 9
- MEASUREMENT ACCURACY 10
- ACCURACY CERTIFICATION 10
- 3 - Connecting the 5300 11
- SINGLE PHASE AC OR DC 12
- CONNECTIONS 12
- INPUT AMPS OUTPUT VOLTS 13
- VOLTAGE SENSE 13
- 4 - Operation4 - Operation 15
- 4 - Operation 15
- V I V I V I 16
- 150 300 600 AUTO 17
- AMPERES RANGE 18
- ANALOG OUTPUT OPTION 18
- 5 - CT/PT Installation 19
- CHANGING OR REMOVING CT/PT 20
- 6 - GPIB Communication 21
- PC TO 5300 PA 22
- 5300 PA TO PC 22
- "SGL" INSTRUCTION 22
- "FULL" INSTRUCTION 22
- LINE n PHASE n 23
- AMPERES TRANSDUCING 25
- VOLTAGE SENSING 25
- ANALOG PROCESSING 25
- DIGITAL PROCESSING 26
- DISPLAY “HELP” 26
- POLYPHASE LINE BALANCE 26
- TEST SETUP 27
- CALIBRATION VERIFICATION 28
- VOLTS CALIBRATION CHECK 28
- AMPERES CALIBRATION CHECK 29
- WATTS CALIBRATION CHECK 29
- MINOR ADJUSTMENT (IF NEEDED) 29
- VOLTS ZERO 30
- AMPERES ZERO 30
- VOLTS SCALE FACTOR 30
- AMPERES SCALE FACTOR 30
- VOLTS BALANCE 31
- CURRENT BALANCE 31
- WATTS SCALE FACTOR 31
- LSD MSD LSD 32
- CIRCUIT BOARD 78B175 39
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