Kron WA User manual

USER'S GUIDE
Power Transducer
WA / RA / WR
Review I

User's Guide
Power Transducer
Review I
KRON Instrumentos E étricos 2
Tab e of Contents
Chapter Page
Introduction 3
Term of Warranty 3
Technical Features 4
Wiring Diagrams 6
Single element, two-wire transducer WA or RA 6
Single element, two-wire transducer WR 7
Two elements, three-wire transducer WA or RA 8
Two elements, three-wire transducer WR 9
Three elements, four-wire transducer WA or RA
10
Three elements, four-wire transducer WR 11
Analog Output 12
Product Installation 17
Annex A: Product Coding 19
The information herein has the purpose of he ping in the correct use
and specification of WA, RA and WR Power Transducers.
Due to continued improvement, the information herein is subject to
changes without prior notice.

User's Guide
Power Transducer
Review I
KRON Instrumentos E étricos 3
Introduction
WA, RA and WR power transducers have the
function of measuring the active (W)
or reactive
(VAr) power in one-phase or three-
phase systems
(either balanced or unbalanced).
The power measurement is made with an analog
multipli
er, that uses the TDM (time division
multiplication) method, generating a DC output
signal, that may be of voltage (e.g.: 0-
10V) or of
current (e.g.: 4-
20mA), and is directly
proportional to the transducer's input. This output
signal is galvanically insula
ted from the
transducer's input.
Term of Warranty
Kron Instrumentos Elétricos Ltda ensures that its products are strictly
calibrated and tested, committing itself to repair them if possible manufacture faults
occur.
One (1) year warranty:
From the product's purchase date upon confirming the purchase invoice.
The warranty does not cover:
•Devices that have been tampered with.
•Disassembled or opened by unauthorized personnel.
•Damaged by overcharge or installation error.
•Used in a negligent or improper manner.
•Damaged by any kind of accident.
Maintenance:
Corrective maintenance, if necessary, should be carried out by Kron
Instrumentos E étricos'
specialized personnel, upon sending the
defective
part to our plant. The instrument cleaning, when necessary,
should be done only in external parts, using neutral material, and with all
electrical connections unplugged.
KRON Instrumentos E étricos
Rua Alexandre de Gusmão, 278
Socorro
São Paulo SP Brazil
ZIP code: 04760-020
PABX: (11) 5525-2000
Support: [email protected]
Website: www.kron.com.br
!

User's Guide
Power Transducer
Review I
KRON Instrumentos E étricos 4
Technica Features
Measurement Circuit
Type: Single-phase (F-N), Single-
phase
(F-F), Wye Three-
phase (3 elements, 4
wires) and Delta Three-
phase (2 elements,
3 wires).
Frequency: 50 or 60Hz (±10%)
Current Input
Rated: 1Aac or 5Aac
Effective Measurement Range:
10 to
110% of In
Short duration overcharge:
20 x In (1
sec)
Continuous overcharge: 2 x In
Power consumption: < 0,5VA
Vo tage Input
Rated: 110Vac 115Vac 150Vac
220Vac 380Vac 440Vac
Effective Measurement Range:
80 to
120% of Vn
Short duration overcharge: 1,5 x Vn
(1 sec)
Continuous overcharge: 1,2 x Vn
Power consumption: < 0,2VA
Auxi iary (or externa ) supp y
To be defined in the order, between these
options:
A ternated: 110 220 Vac (± 15%)
Continuous: 12 24 48
125 Vdc (±
20%)
Maximum power consumption: 5VA
Environmenta Conditions
Working Temperature: -10 to 60º C
Operating Moisture: 0-95% (no
condensing)
Temperature coefficient: 0.01%/°C
Mechanica Features
Fastening: With screws (4) in the panel
background.
Housing: Special extruded aluminum case
with high mechanical resistance and for
high temperatures.
Connections:
Through terminal strip with
M3 screws.
Protection degree: IP40 for housing and
IP00 for terminals.
E ectrica Features
Accuracy: 0.25% (under consultation:
0.2%)
Insu ation: 2kV (60Hz, 1 minute)
Impu se Test: 5kV 1.2/50us 0.5J
Output Ripp e: <0.5% (regarding full
scale)
Response Time: < 400ms
(others under consultation)
Standardizing
According to NBR 8145.

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Power Transducer
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KRON Instrumentos E étricos 5
Product's Dimensions
Dimensions in millimeters (mm). Tolerance: ±0.5mm

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Power Transducer
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KRON Instrumentos E étricos 6
Wiring Diagrams
Sing e e ement, two-wire transducer
WA or RA mode s

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Power Transducer
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KRON Instrumentos E étricos 7
Sing e e ement, two-wire transducer
WR mode

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Power Transducer
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KRON Instrumentos E étricos 8
Two e ements, three-wire transducer
WA or RA mode s

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Power Transducer
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KRON Instrumentos E étricos 9
Two e ements, three-wire transducer
WR mode

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Power Transducer
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KRON Instrumentos E étricos 10
Three e ements, four-wire transducer
WA or RA mode s