M-system KUWEN User manual

5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-3651 Rev.5 P. 1 / 3
INSTRUCTION MANUAL
WATT TRANSDUCER
(for 3-phase/4-wire, self-powered) MODEL KUWEN
BEFORE USE ....
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.
■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 sig-
nal is supplied, however, a warm up for 10 minutes is re-
quired for satisfying complete performance described in
the data sheet.
COMPONENT IDENTIFICATION
CT Protector
K
-UNIT
Body Base Socket
Zero Adj.
Span Adj.
Specifications
(side)
Connection Diagram
INSTALLATION
Detach the yellow clamps located at the top and bottom of
the unit for separate the body from the base socket.
Clamp
(top & bottom)
DIN Rail
35mm wide
Spring Loaded
DIN Rail Adaptor
Shape and size of the base socket
are slightly different with various
socket types.
■DIN RAIL MOUNTING
Set the base socket so that its
DIN rail adaptor is at the bot-
tom. 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.
■WALL MOUNTING
Refer to “EXTERNAL DI-
MENSIONS.”

KUWEN
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-3651 Rev.5 P. 2 / 3
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)
80 (3.15)
50 (1.97)
72 (2.83) [3.3 (.13)]
80 (3.15)
20
(.79)
60 (2.36)
72 (2.83)
7.8 (.31)
CLAMP
(top & bottom)
DIN RAIL
35mm wide
2 – 4.5 (.18) dia.
MTG HOLE
25 (.98) deep
14
– M3.5
SCREW
• When mounting, no extra space is needed between units.
12 56 14
11 1 1015
4
3
2
7
9
8
103 (4.06)
132 (5.20)
■CONNECTION DIAGRAM
LOAD
1N23
SOURCE
P2
V
P1U
v
u
FUSE VT
Vv
P3
Uu
Vv
P0
Uu
k
l
CT
L
K
1L
1S
2L
2S
3L
3S
k
l
L
K
k
l
L
K
7
14
6
3
5
8
9
15
12
4
11
2
■ 3-PHASE/4-WIRE
+
–
10
1
DC OUTPUT
+
–
PULSE OUTPUT
*
*
*
■ Open Collector
Pulse Output Connection Example
*CT Protector (model: CTM) attached to these terminals.
+
–
7
14
■TERMINAL ASSIGNMENTS unit: mm (inch)
56 14
1 10
3
7
8
CT PROTECTOR
(model: CTM)
20 (.79)
15 9
20 (.79)
CT PROTECTOR
(model: CTM)
12
11
4
2

KUWEN
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-3651 Rev.5 P. 3 / 3
CHECKING
1) Terminal wiring: Check that all cables are correctly con-
nected according to the connection diagram.
2) Input: Calculate the calibration range and check that the
result is within the usable range.
Calibration Range [W] = Measuring Wattage
(VT Ratio) × (CT Ratio)
3) DC output: Check that the load resistance meets the de-
scribed specifications.
4) Pulse output: Check that the load connected to the open
collector output is within 35V DC @ 100mA.
ADJUSTMENT PROCEDURE
This unit is calibrated at the factory to meet the ordered
specifications, therefore you usually do not need any cali-
bration.
For matching the signal to a receiving instrument or in case
of regular calibration, adjust the output as explained in the
following.
■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 proce-
dure 1) – 3).
MAINTENANCE
Regular calibration procedure is explained below:
■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 accu-
racy described in the data sheet. When the output is out of
tolerance, recalibrate the unit according to the “ADJUST-
MENT PROCEDURE” explained earlier.
LIGHTNING SURGE PROTECTION
M-System offers a series of lightning surge protector for
protection against induced lightning surges. Please contact
M-System to choose appropriate models.