INSTRUCTION MANUAL
WATT TRANSDUCER
MODEL
(for 3-phase/4-wire, self-powered)
BEFORE USE ....
KUWEN
COMPONENT IDENTIFICATION
Thank you for choosing M-System. Before use, please check
contents of the package you received as outlined below.
If you have any problems or questions with the product,
please contact M-System’s Sales Office or representatives.
■ PACKAGE INCLUDES:
Signal conditioner
(body + base socket + CT protector)....................................(1)
■ MODEL NO.
Confirm Model No. marking on the product to be exactly
what you ordered.
■ INSTRUCTION MANUAL
This manual describes necessary points of caution when
you use this product, including installation, connection and
basic maintenance procedures.
POINTS OF CAUTION
■ GENERAL PRECAUTIONS
• Before you remove the unit from its base socket or mount
it, turn off the input signal for safety.
■ CT PROTECTOR
• Temperature of the CT Protector may rise if the signal
conditioner body is left unplugged from the base socket.
Be careful not to get burned when you need to touch it.
■ ENVIRONMENT
• Indoor use.
• When heavy dust or metal particles are present in the
air, install the unit inside proper housing with sufficient
ventilation.
• Do not install the unit where it is subjected to continuous
vibration. Do not subject the unit to physical impact.
• Environmental temperature must be within -10 to +55°C
(14 to 131°F) with relative humidity within 30 to 85% RH
in order to ensure adequate life span and operation.
Body
Base Socket
Specifications
Zero Adj.
Span Adj.
Connection Diagram
K-UNIT
CT Protector
(side)
INSTALLATION
Detach the yellow clamps located at the top and bottom of
the unit for separate the body from the base socket.
■ DIN RAIL MOUNTING
Set the base socket so that its
DIN rail adaptor is at the bottom. Hang the upper hook at
the rear side of base socket on
the DIN rail and push in the
lower. When removing the
socket, push down the DIN
rail adaptor utilizing a minus
screwdriver and pull.
Clamp
(top & bottom)
DIN Rail
35mm wide
Spring Loaded
DIN Rail Adaptor
■ WALL MOUNTING
Shape and size of the base socket
Refer to “EXTERNAL DI- are slightly different with various
socket types.
MENSIONS.”
■ WIRING
• Do not install cables close to noise sources (relay drive
cable, high frequency line, etc.).
• Do not bind these cables together with those in which
noises are present. Do not install them in the same duct.
■ AND ....
• The unit is designed to function as soon as the input signal is supplied, however, a warm up for 10 minutes is required for satisfying complete performance described in
the data sheet.
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: [email protected]
EM-3651 Rev.5
P. 1 / 3
KUWEN
TERMINAL CONNECTIONS
Connect the unit as in the diagram below or refer to the connection diagram on the side of the unit.
Attach the CT Protector together with input wiring to the input screw terminals.
■ EXTERNAL DIMENSIONS unit: mm (inch)
CLAMP
(top & bottom)
20
(.79)
7.8 (.31)
DIN RAIL
35mm wide
7 14 6
5 12 4
2–4.5 (.18) dia.
MTG HOLE
25 (.98) deep
50 (1.97)
14 –M3.5
SCREW
103 (4.06)
72 (2.83)
132 (5.20)
80 (3.15)
80 (3.15)
3
8
9 15 10
1 11 2
60 (2.36)
[3.3 (.13)]
72 (2.83)
• When mounting, no extra space is needed between units.
■ CONNECTION DIAGRAM
■ TERMINAL ASSIGNMENTS unit: mm (inch)
■ 3-PHASE/4-WIRE
CT PROTECTOR
(model: CTM)
U
VT
u
P1
V
v
P2
U
V
U
V
u
v
u
v
P3
P0
K K K
k
1S
k
L
k
l l l
L L
CT
1L
2S
2L
3S
3L
6
10 +
3
1 –
5
7 +
8
14 –
DC OUTPUT
7 14 6
5 12
4
3
20 (.79)
FUSE
2
20 (.79)
SOURCE
N 1 2 3
PULSE OUTPUT
8
9
*
15
9
15 10
1 11
12
*
4
CT PROTECTOR
(model: CTM)
11
*
2
LOAD
*CT Protector (model: CTM) attached to these terminals.
Pulse Output Connection Example
■ Open Collector
7
+
14
–
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: [email protected]
EM-3651 Rev.5
P. 2 / 3
KUWEN
CHECKING
MAINTENANCE
1) Terminal wiring: Check that all cables are correctly connected according to the connection diagram.
Regular calibration procedure is explained below:
2) Input: Calculate the calibration range and check that the
result is within the usable range.
■ CALIBRATION
Warm up the unit for at least 10 minutes. Apply 0%, 25%,
50%, 75% and 100% input signal. Check that the output
signal for the respective input signal remains within accuracy described in the data sheet. When the output is out of
tolerance, recalibrate the unit according to the “ADJUSTMENT PROCEDURE” explained earlier.
Calibration Range [W] =
Measuring Wattage
(VT Ratio) × (CT Ratio)
3) DC output: Check that the load resistance meets the described specifications.
4) Pulse output: Check that the load connected to the open
collector output is within 35V DC @ 100mA.
LIGHTNING SURGE PROTECTION
ADJUSTMENT PROCEDURE
This unit is calibrated at the factory to meet the ordered
specifications, therefore you usually do not need any calibration.
For matching the signal to a receiving instrument or in case
of regular calibration, adjust the output as explained in the
following.
M-System offers a series of lightning surge protector for
protection against induced lightning surges. Please contact
M-System to choose appropriate models.
■ HOW TO CALIBRATE THE DC OUTPUT SIGNAL
Use a signal source and measuring instruments of sufficient
accuracy level. Turn the input signal on and warm up for
more than 10 minutes.
1) ZERO: Apply 0% input and adjust output to 0%.
2) SPAN: Apply 100% input and adjust output to 100%.
3) Check ZERO adjustment again with 0% input.
4) When ZERO value is changed, repeat the above procedure 1) – 3).
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: [email protected]
EM-3651 Rev.5
P. 3 / 3
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