Mitsubishi Electric EMU4-LG1-MB User Manual

Energy Measuring Unit with Insulation Monitoring
Model EMU4-LG1-MB
User's Manual ( Digest )
• Before using this unit, please read both this manual and Details carefully and pay attention to safety to handle this unit correctly.
• Make sure that the end users read this manual and then keep the manual in a safe place for future reference.
ABOUT MANUALS
You can download User's manual ( Details ) of this unit from the following site.
http://www.mitsubishielectric.com/fa/worldwide/index.html
1. Features
• This unit can measure Leakage current (Io) and resistance leakage current (Ior) for equipment insulation monitoring.
• This unit can be used alone, and can also add the Energy Measuring Unit and the communication unit. Therefore you can build the measuring system flexibly.
• Two-step alert monitor is available for leak current Io and resistive leak current Ior. Two-step alert can be used as the caution alert and danger alert, for example.
• This unit can memorize the frequency of Io first alert, Io second alert, Ior first alert and Ior second alert, and can monitor the upper limit alert of the alert frequency. Therefore
you can use this unit for monitoring the system by alert frequency.
• You can monitor three-phase 4-wire system. ( Limited to the measurement of Io )
• You can measure the leak current in increments of 0.01mA in high sensitivity mode.
• The measurement data can also be transmitted to superior monitoring systems through MODBUS RTU communication.
MODBUS is a trademark of Schneider Electric USA Inc.
2. Checking package contents
This following items for this device and included in package. Check that no items are missing.
( 1 ) Energy Measuring unit x1 ( 2 ) User's Manual ( Digest ) x1
3. Safety Precautions
3.1 Precautions for Operating Environment and Conditions
(Note)
This unit is premised on being used in pollution degree 2 environment. When used in higher pollution degree, protect this unit from pollution on another device side to be
incorporated.
Over voltage category of measuring circuit in this unit is CAT III (Note)
Do not use this product in the places listed below. Failure to follow the instruction may cause malfunctions and a life decrease of product.
• P a l c e s h t e A m b e i t n e t m p e a r u t e r e c x e e d s h t e a r n g e 5 - o t + 5 ° 5 . C
• A i t l u t d e e c x e e d s 2 0 0 0 m .
• Places in strong electromagnetic field or places large amounts of external noise exist.
• P a l c e s e p x o s e d o t i d e r t c u s n g i l t h
• P a l c e s e p x o s e d o t a r n i r o w t a r e d o r . p
This unit is the open type device, which are designed to be housed within another device for prevention of electric shock. House this unit within the device such as the control
panel before use. (Indoor use)
For the precautions for the compliance of the system incorporating this unit with the EMC Directives, refer to the User's Manual (Details).
(Note) For the definition of the pollution degree and the over voltage category, refer to EN61010-1/2010.
3.2 Matters concerning the precaution before use
• Use the unit in the specified usage environment and conditions.
• To set this unit, dedicated small-size display unit (EMU4-D65) is necessary. For the setting method, refer to User's manual (Details) of the display unit.
3.3 Installation and Wiring Precautions
• Shut off the external power supply for the unit in all phases before installing or wiring. Failure to do so may cause an electric shock or damage of
this unit.
Danger
• Work under the electric outage condition when installing and wiring. Failure to do so may cause electric shock, a failure of the unit, a fire etc.
• Any person who is involved in the installation and the wiring of this unit should be fully competent to do this work.
• When tapping or wiring, take care not to entering any foreign objects such as chips and wire pieces into this unit.
• Keep the space around this product (all directions except the back) is 30 mm or more (100 mm or more for UL standard compliance).
• Check the connection diagram when wiring. Wrong wiring may cause failure of the unit, a fire or electric shock.
• This equipment is class A as per EN55011. This equipment is not intended for use in residential environments and may not provide adequate protection to radio reception in
such environments.
• For protection against noise, transmission lines and input/output lines shall not be placed close to or bound together with the power lines and high-voltage lines.
• Strip the wires with proper length. Overlong stripping length may cause short to next wire and electric shock. Shorter stripping length may cause contact failure.
• Take care not to short to next terminal by a filament. (Do not plate the wires with solder.)
• Do not connect more than two wires to one terminal of a terminal block for preventing loose contact and wires dropout.
• Use appropriate size of electric wires. If inappropriate size of electric wire is used, it may cause a fire due to generated heat.
• Tighten the screw within the specified torque. Under tightening can cause drop of the screw, short circuit or malfunction. Over tightening can damage the screw and/or unit, resulting in
drop, short circuit or malfunction.
• After tightening the screws, be sure to check all the screws tightened. Loose screw may cause malfunction of the unit, a fire or electric shock.
• Be sure to attach the terminal cover to prevent electric shock.
• Use the crimp-type terminal appropriated for the size of electric wires. If inappropriate crimp-type terminal is used, a wire breakage or a contact failure may occur, which may cause a
Caution
device malfunction, a failure, a burnout or a fire.
• FG terminal must be grounded according to the D-type ground (ground resistance is not exceed 100Ω).
• Do not directly touch any conductive part of the unit. Doing so can cause electric shock, failure or malfunction of the unit.
• When using this product, make sure to use it in combination with the zero-phase current transformer (MITSUBISHI CZ, ZT series). Please not to exceed the rating of this product for
input of the zero-phase current transformer. For further details, please refer to the manual for the zero-phase current transformer to maintain the functionality and the accuracy of this
product.
• The zero-phase current transformer (MITSUBISHI CZ and ZT series) is used only for low voltage circuit. It cannot be used for a high voltage circuit. If it is connected with a high-voltage
circuit by mistake, it may cause a burnout of the device and a fire. It is critically dangerous.
• The zero-phase current transformer (MITSUBISHI CZ and ZT series) does not have a polarity (directionality).
• The wires to be connected to this unit shall be placed in a duct or fixed together by cramping. If the electric wires are not placed in the duct or cramped together, loosen wires or their
movement or careless stretch may cause a breakage of the unit or wire or a malfunction due to poor contact of electric wires.
• If the wires connected to this unit are strongly pulled off, it may cause a malfunction or a breakage to the unit or the wire.
• Do not exceed the specified voltage when doing an insulation resistance test and a commercial frequency withstand voltage test.
• To prevent persons with little knowledge about electric equipment from electric shock, panel must be taken either following measure. Lock the panel so that only those who get an
education about electric equipment and have sufficient knowledge can unlock, or shut off power supply automatically by opening the panel. Cover the dangerous part of this unit.
3.4 Precautions for Use
• This unit cannot be used for deal and proof of electric energy measurement stipulated in Measurement Act.
• Use this unit within the ratings specified in this manual. If it is used outside the ratings, it may cause not only malfunction or failure but also fire burnout.
• Do not disassemble or modify this unit. It may cause failure, malfunction, injury or fire.
Caution • For protection against electric shock, use a insulation precision screwdriver when push a reset button.
• Do not touch the live part such as connection terminal. It may cause electric shock, electric burn injury or burnout of the device. If any exposed conductor is found, stop the operation
immediately, and take an appropriate action such as isolation protection.
3.5 Maintenance Precautions
• Use a soft dry cloth to clean off dirt of the unit surface. Do not let a chemical cloth remain on the surface for an extended period of time nor wipe the surface with thinner or
benzene.
• Check for the following items to use this unit properly for long time.
(1) Daily maintenance
( ) a N o d a m a g e o n h t s i u t i n ( ) b N o a b n r o
(2) Periodical maintenance (Once every 6 months to 1 year)
• No looseness with installation and wire connection
Do periodical maintenance under the electric outage condition. Failure to do so may cause electric shock, failure of the unit or a fire. Tighten the terminal regularly to prevent a fire. In
Caution
case a display unit is attached to a sensor unit, get off the display unit during maintaining or tightening terminals.
If you are considering using this unit for special purpose such as nuclear power
plants, aerospace, medical care or passenger vehicles please refer to our sales
representative.
( 3 ) User's Manual ( zero-phase current transformer ) x1
, and that of auxiliary power circuit (MA, MB) is CAT III (Note) .
• P a l c e s h t e a v e a r g e d a y l i e t m p e a r u t e r e c x e e s d + 3 ° 5 . C
• D u s , t c r o o r i s e v g a , s s a n i l e a n d i o s l m o k e e x s i . t
• Vibration and impact exceed the specifications.
• P a l c e s m e a t f l a r g m e n s t r o c o n d u c v i t e s u b s a t c n e a e r y l f n i . g
• P a l c e s h t e R e a l v i t e h u m d i y t i e c x e e d s h t e a r n g e 3 0 o t 8 5 % r o
m l a y t i i w h t L E D ( ) c N o a b n r o m l a n o s i , e s m l l e r o
3.6 Storage Precautions
To store this unit, turn off the power and remove wires, and put it in a plastic bag.
For long-time storage, avoid the following places. Failure to follow the instruction may cause a failure and reduced life of the unit.
• Places the Ambient temperature exceeds the range -10 to +60°C.
• Places the Relative humidity exceeds the range 30 to 85% or places with dewfall.
• D u s , t c r o o r s v i e g a , s
• Places the average daily temperature exceeds +35°C.
3.7 Disposal Precautions
When disposing of this unit, treat it as industrial waste.
3.8 About packaging materials and this manual
For reduction of environment load, packaging materials are produced with cardboard.
4. Name and function of each part
4.1 Name of each part
( ) 1 F o r t n v e i w
Voltage input terminals (P1/P1,
P2/P0, P3/P3, NC/P2)
Connect the voltage input
wire for the measurement
circuit.
LED
Indicate operating
condition of this unit.
(See Section 4.2
"Indication and functions
of LEDs")
Leak current input terminals
(Z+, Z)
Connect the secondary
output of the zero-phase
current transformer.
p a l c e s i w h t d e w a f . l l
MODBUS RTU communication terminal (485+,
485-, SLD, Ter)
485+, 485- : Connect MODBUS RTU
communication wires.
SLD: Connect to ground (D type ground).
Ter: Connect the "485- "terminal (the unit at
end of the link).
4.2 Indication and functions of LEDs
The names and operations of LEDs are as follows.
N a m e C l o r o
RUN LED Red
MEA. LED Red
AL.Io1 LED Red
AL.Io2 LED Red
AL.Ior1 LED Red
AL.Ior2 LED Red
(Note 1) For details, refer to Chapter 14 "Error codes" of "User's Manual (Details)".
(Note 2) When an error occurs, AL.Io1, AL.Io2, all of the AL.Ior1 and AL.Ior2 turn on.
(Note 3) 500msec ON and 500msec OFF are repeated.
(Note 4) 100msec ON and 100msec OFF are repeated.
5．Optional devices connectable to this unit
Optional devices connectable to this unit are as follows.
Device
Extension unit Energy Measuring Unit Extension for the system with the same voltage
Energy Measuring Unit Extension for the system with the different voltage
E n e g r
E n e g r
Optional Unit B/NET Communication Unit fo
C C L -
CC-Link IE Field Network Basic Communication Unit for Energy Measuring Unit
CC-Link IE TSN Communication Unit for Energy Measuring Unit
L o g g
S m a
*1 When connecting to EMU4-CM-TSN, please use this device produced after October 2024 or with F/W version: 01.02 or later.
*2 For the details of each device and the way to connect,refer to the manual of the device.
h e t a
• Vibration and impact exceed the specifications.
• Places exposed to rain, water drop or direct sunlight.
s a n i l e a n d i o s l m o k e e x s i . t • P a l c
( ) 2 B a k c v e i w a n d s d i e v e i w
Frame GND terminal ( )
Connect to ground (D type ground).
Power supply terminals (MA, MB)
Connect the auxiliary power
B a k c v e i w
supply.
Connector (Small-size display
unit)
Connect Small-size Display
Unit.
RESET button
Reset this unit.
Connector (for optional devices)
Connect an optional device.
(See Chapter 5 "Optional
External output terminals (Y1,
devices connectable to this
COMY1)
unit")
Connect the pulse/ contact
output wire.
IEC rail fixture
F u n t c o i n S a t u t s
Indicate operating status of this unit. ON: Normal condition
OFF: Power off or hardware failure (Note 1)
Indicate measuring status of this unit ON: In the middle of measuring Io
OFF: Halting measurement
Indicate occurrence status of Io first alert ON: An error occurs (Note 2)
of this unit Brink slowly (Note 3): Io first alert is issued
Brink rapidly (Note 4): Upper limit alert of the frequency of Io first alert is issued
OFF: Io first alert is not issued
Indicate occurrence status of Io second ON: An error occurs (Note 2)
alert of this unit Brink slowly (Note 3): Io second alert is issued
Brink rapidly (Note 4): Upper limit alert of the frequency of Io second alert is issued
OFF: Io second alert is not issued
Indicate occurrence status of Ior first alert ON: An error occurs (Note 2)
of this unit Brink slowly (Note 3): Ior first alert is issued
Brink rapidly (Note 4): Upper limit alert of the frequency of Ior first alert is issued
OFF: Ior first alert is not issued
Indicate occurrence status of Ior second ON: An error occurs (Note 2)
alert of this unit Brink slowly (Note 3): Ior second alert is issued
Brink rapidly (Note 4): Upper limit alert of the frequency of Ior second alert is issued
OFF: Ior second alert is not issued
y M e a s r u n i g U n t i P u s l e n I p t u U t i n
y M e a s r u n i g U t i n A n a o l g n I p t u U t i n
r E n e g r y M e a s r u n i g U n t i
n i k C o m m u n c i t a o i n U i n f t r o E n e g r y M e a s r u n i g U n t i
n i g U i n f t r o E n e g r y M e a s r u n i g U n t i
- l l i s e z D s i p a l y U i n f t r o E n e g r y M e a s r u n i g U n t i
e s metal fragments or conductive substance are flying.
R g i t h s - d i e v e i w
Left-side view
Connector (for optional devices)
Connect an optional device.
(See Chapter 5 "Optional
devices connectable to this
unit")
Model Connection terminal
EMU4-A2 The connector on the right side of the unit
EMU4-VA2 The connector on the right side of the unit
E M U 4 P - X 4 T h e c o n n e t c r o o n h t e r g i t h s d i e f o h t e u n t i
E M U 4 A - X 4 T h e c o n n e t c r o o n h t e r g i t h s d i e f o h t e u t i n
E M U - 4 C M B - T h e c o n n e t c r o o n h t e e l t f s d i e f o h t e u n t i
E M U4-CM-C The connector on the left side of the unit
EMU4-CM-CIFB The connector on the left side of the unit
EMU4-CM-TSN The connector on the left side of the unit
E M U 4 L - M T h e c o n n e t c r o o n h t e e l t f s d i e f o h t e u n t i
E M U - 4 D 6 5 T h e c o n n e t c r o o n h t e f o r t n f o h t e u n t i