Mitsubishi Heavy Industries Anti Rolling Gyro User manual

ARG375T OPERATION INSTRUCTIONS
Model：MSM-37500T-A1

Anti Rolling Gyro
Model:MSM-37500T-A1
−i −
Preface
This operation instructions summarized important information for proper operation of
Anti Rolling Gyro (ARG). Please be sure to read this manual before operation.
Please be sure to submit this manual to customers who operate the ARG.

Anti Rolling Gyro
Model:MSM-37500T-A1
−ii −
Important Notice
■Purpose and Application of Use
・The ARG suppresses rolling motion of the ship.
・The ARG applies a principle that the Gyro torque (force) is
generated by inclination of the flywheel rotation at high speed.
■General Information
・In order to safely operate the ARG
(a) Only the repairmen, who have received the specified training
about the ARG, are permitted to perform maintenance and
inspection other than items mentioned in this manual.
(b) Before operation of the ARG, carefully read this manual of the
ARG for comprehending the details. If starting the work with
insufficient knowledge, it may cause the ARG failureor
an accident resulting in injury or death.
(c) Do not disassemble and modify the ARG by yourself.
If the ARG is disassembled or modified by the customer,
−It may cause a decrease in the ARG performance.
−It may endanger human life.
−It may cause a health problem.
−It may cause damage to the ARG or ship.
(d) Please contact the Sales Agent for installation or removal of
the ARG. If installation or removal of the ARG is performed by
the customer, it may result in injury and damage to the ARG
and ship.
・Please observe the applicable governmental and local laws and
regulations.
・Mitsubishi Heavy Industries, Ltd. is not responsible for any damages
and losses that happened to the customer except for the first
customer who purchased from the Sales Agent.

Anti Rolling Gyro
Model:MSM-37500T-A1
−iii −
■General Information（continue）
・Please observe the governmental and local regulations for 
exportation of the ARG.
・Please observe the governmental and local regulations for disposal
of the ARG.
■Important Information for Operation Safety
・The most important purpose of safety measures is to prevent the
persons from an accident resulting in injury or death as well as to
protect the ARG and ship from avoidable trouble.
・For preventing injury/death in an accident and the ARG from damage,
follow the cautions, rules, and instructions described in this manual
giving the top priority to safety. If ignored,
a) It may endanger human life.
b) It may cause a health problem.
c) It may cause damage to the ARG or ship.
・Mitsubishi Heavy Industries, Ltd. cannot foresee all possible danger
existing in the ARG, resulting from human error, and in the
environment where the ARG is used.
There are many “Musts”, “Can’ts” and “Don’ts”, and it is impossible
to mention all in this manual or warning labels.
Therefore, general safety measures must be taken in addition to the
instructions described in this manual.
・Mitsubishi Heavy Industries, Ltd. is not responsible for any damage
and hindrance resulting from customer’s carelessness or lack of
required attention to the specified rules shown in this manual.

Anti Rolling Gyro
Model:MSM-37500T-A1
−iv −
■About Operation Instructions
・This operation instructions are written for native readers of English.
When this ARG is handled by non-English-speaking people, give
the people fully training on safety.
・The copyright of this manual is held and reserved by Mitsubishi
Heavy Industries, Ltd. No drawing and no technical description in
this manual regardless of partial or whole may be published,
reproduced, copied, photographed, translated, or transcribed into
electronic medium without written permission of MHI in advance.
・The ARG may differ from the pictures and drawings shown in this
manual.
・The contents of this manual may be changed without prior notice.
・Carefully keep this manual in a certain place so that anybody can
read it as the need arises.
・If there are any questions or doubts, please contact the Sales Agent.
(“Contact” (last page))

Anti Rolling Gyro
Model:MSM-37500T-A1
−v −
Contents
 Page
1．For your safety ...................................................................... 1
1.1 Warning description ......................................................... 1
1.2 Warning labels .................................................................. 2
1.3 Precautions of Operation .................................................. 3
2．Configurations ....................................................................... 4
2.1 ARG unit
.............................................................................. 4
2.2 Motor Driver
......................................................................... 5
3．Check before operation ......................................................... 6
4．Operating the ARG................................................................ 15
4.1 Method of operation.......................................................... 17
4.2 Restarting ......................................................................... 19
4.3 Automatic Fast return functions ........................................ 20
4.4 Safety functions ................................................................ 21
5．What to do in case of problems............................................. 22
6．Maintenance.......................................................................... 25
7．Installation ............................................................................. 31

Anti Rolling Gyro
Model:MSM-37500T-A1
−1 −
1. For your Safety
1.1 Warning description
■ Description of Labels
“Warning labels” and “Warning descriptions” in this manual warn
expected dangerous situation that may occur during operation.
If they are ignored, serious injuries or accidents corresponding
to the respective warning sign may result. In extreme case, there
is also a possibility of death, damage to the ARG or ship, and
environmental fracture.
Warnings Meanings of Warnings
IMPORTANT
Indicates “IMPORTANT” subjects that are observed in
handling the ARG.
If the ARG is handled with ignoring this indication, 
it could result in death or serious accident.
DANGER
Indicates a dangerous situation. If ignored, it could
result in death, serious injury, serious property damage
or environmental damage.
CAUTION
Indicates a dangerous situation. If ignored, it could
result in minor injury, property damage or environmental
damage.
■ Meaning of the symbols
Symbols Meanings Examples
Prohibition
sign
“ “ indicates prohibition.
Detail is shown in the inside of the symbol, or shown by
illustration or sentence near the symbol.
The right illustration means “DO NOT DISASSEMBLE”.
（DO NOT
DISASSEMBLE）
Caution
sign
“ “ indicates danger or caution.
Detail is shown in the inside of the symbol, or shown by
illustration or sentence near the symbol.
The right illustration means “DANGER OF ELECTRIC
SHOCK”.
（DANGER OF
ELECTRIC SHOCK）
Direction
sign
“ “ indicates mandatory contents.
Detail is shown by illustration, or sentence near the
symbol or inside the symbol.
（General direction）

Anti Rolling Gyro
Model:MSM-37500T-A1
−2 −
1.2 Warning labels
ARG unit
Motor Driver
Danger of electric shock.
Do not disassemble.
Do not close.
Connecto
r
Hot surface
（Both dampers）
Danger of electric shock.
Do not disassemble.
Hot surface
（Both covers）
Do not place objects.
Do not close.

Anti Rolling Gyro
Model:MSM-37500T-A1
−3 −
1.3 Precautions of Operation
Observe the following when operating.
IMPORTANT
General Precautions
Be sure to read this manual and understand the contents.
Operation Environment
・Do not operate under stormy weather and excessive high wave (2.0m)
conditions.
・The ARG is designed to improve the comfort of you and passengers on
a ship. The ARG is not the equipment which enables a ship to sail under
stormy weather and excessive high wave (2.0m) conditions.
・Do not quick-turn repeatedly during the ARG operation.
Maintenance
・Perform the pre-operational inspection.
・Have the periodic inspection performed by the Sales Agent every two years.
・Contact the Sales Agent for wiring of the ARG.
Operational problems
If abnormalities occur during operation, immediately turn off switch to shut
down the ARG. Contact the Sales Agent. (“Contact” (last page))
Installation
The model, numbers of the ARG unit and the Motor Driver are decided for
each ship. Never divert the ARG unit and the Motor Driver to other ships.
Disposal
Observe the governmental and local regulations for disposal of the ARG.

Anti Rolling Gyro
Model:MSM-37500T-A1
−4 −
2. Configurations
2.1 ARG unit
Table 2-1 ARG unit（1EA）
Item Specifications
Name ARG375T
Model MSM-37500T-A1
Dimensions 1120mm(width) x 830mm(depth) x 780mm(height)
44.1 inches(width) x 32.7 inches(depth) x 30.8 inches(height)
Weight Approx. 910kg / 2006 lbs
Power supply
Supplied exclusive Motor Driver(MAA-7500A-A200)
(Single-phase 220 to 240VAC 50/60Hz /
Three-phase 200 to 240VAC 50/60Hz)
Ambient
temperature -10 to 40℃
Power
consumption *1)
Single-phase：Approx. 5.5kW(Max) 4.5kW(Max) (Steady-state)
Three-phase：Approx. 5.2kW(Max) 4.3kW(Max) (Steady-state)
Angular
momentum Approx. 7500Nms
Rotational
speed Approx. 3250rpm
Noise *2) 80dBAmaximum
Vibration *2) 1 m/s2maximum
Performance
・The ARG suppresses rolling motion of the ship.
・The ARG applies a principle that the Gyro torque (force) is generated by
inclination of the flywheel rotating at high speed.
・The ARG stops automatically in abnormal conditions (excessive load, abnormal
temperature, etc.).
Others Start up duration to the rated speed: Approx. 45 minutes
To stop the operation completely from the steady state: Approx. 60 minutes.
*1) Power consumption varies with the customer generator.
*2) Measurement as per MHI’s specification.
The measurements data depend on measurements conditions (installation place,
measurements method, etc.).
Frame
Connector
Cover
Damper
Blowhole Installation points（8 places）
Thermo Label
（reference）
ARG unit

Anti Rolling Gyro
Model:MSM-37500T-A1
−5 −
2.2 Motor Driver
Table 2-2 Motor Driver（1EA）
Item Specifications
Model MAA-7500A-A200
Dimensions 400mm(width) x 200mm(depth) x 450mm(height)
15.8 inches(width) x 7.9 inches(depth) x 17.8 inches(height)
Weight Approx. 18kg / 40 lbs
Control method Inverter control
Ambient
temperature -10 to 40℃
Humidity 5 to 95%（with no condensation）
Power supply *3) Single-phase 220 to 240VAC 50/60Hz /
Three-phase 200 to 240VAC 50/60Hz
Options
(outer connecting
terminal)
（Please prepare
by customer）
①Remote switch: connect to the Motor Driver to remote
control the ARG operation (ON/OFF).
The ARG can be switched on /off by this remote switch.
②Start check lamp: connect to the Motor Driver to make sure
the ARG is in operation or not.
③Rotation rate check lamp: connect to the Motor Driver to
make sure the ARG had reached the rated rotational speed
(steady state) or not.
Others The ARG’s operating condition is checked by Monitoring
window.
*3) The Motor Driver is able to use both single-phase and three-phase.
Please choose appropriate power input as needed.
Motor Driver
：Screw for lid（8 places）
Lid
PL (Product Liability) Label
Bracket for installation
Installation points（4places）
Monitoring window

Anti Rolling Gyro
Model:MSM-37500T-A1
−6 −
3. Check before operation
Please inspect the items in Table 3-1.
Please make sure of “Warning” and “Caution” in this manual.
DANGER
Do not operate under stormy
weather and excessive high wave
(2.0m) conditions.
The ARG is designed to improve the
comfort of you and passengers on a ship.
Do not operate under stormy weather and
excessive high wave (2.0m) conditions.
Doing so could result in damage to the
ship, or malfunction of the ARG.
Do not quick-turn repeatedly
during the ARG operation.
The ARG is intended to suppress rolling
of the ship at anchoring or trolling.
Repeating quick-turn (6 turns a minute)
could change a sense of control of ship.
Doing so could result in damage to the
ship, malfunction of the ARG or accident.
Do not use damaged parts.
Do not use damaged parts.
Doing so could result in injury or
malfunction. Please contact the Sales
Agent whose address is shown at the end
of this manual.
Wave of more
than 2.0m
Damage

Anti Rolling Gyro
Model:MSM-37500T-A1
−7 −
DANGER
Do not place flammable materials
near the ARG.
When the ARG is in operation, it is heated.
Do not place flammable materials or
heat-sensitive items (which are deformed
or damaged e.g. by heat) near the ARG.
Doing so could result in malfunction or fire.
Do not close blowholes of the ARG.
Do not close blowholes of the ARG.
Closing blowholes will heat the inside of
the ARG. Closing blowholes of the ARG
could result in malfunction or fire.
Never operate the ARG when it is
exposed to the seawater / rain.
The ARG is not waterproofed.
Never operate the ARG when it is exposed
to the seawater / rain.
Doing so could result in electric shock or
malfunction.
Do not operate switches with wet
hands.
Do not operate switches with wet hands.
Doing so could result in electric shock.
Use all installed ARG units.
Use all installed ARG units.
Using only a few of them could lead to
excessive load and it could result in
malfunction.
Blowhole
ON
ON
ON
Flammable
materials

Anti Rolling Gyro
Model:MSM-37500T-A1
−8 −
DANGER
Use the ARG at the specified
temperature.
Use the ARG in the location that ambient
temperature range is from -10℃to 40℃
considering that the ARG generates heat.
If the temperature is expected to be 40 ℃
or higher, ventilate to cool them down.
Not doing so could result in malfunction or
fire.
Keep a space of 200mm (7.9 inches)
around the ARG.
Since the ARG takes in outside air to
ventilate, the space of 200mm (7.9 inches)
is required around the ARG (ARG unit and
Motor Driver ) to provide enough
ventilation.
Make sure that there is no vertical
gap in the anti-vibration rubber,
plate or washer.
Make sure that there is no vertical gap in
the anti-vibration rubber, plate or washer.
Not doing so could result in damage to the
ARG or ship.
Check the discoloration of the
thermo label attached to damper.
If the 80 or 90 of the thermo label
discolors, contact the Sales Agent.
Not doing so could result in damage to the
ship, malfunction of the ARG or injury.
More than 200mm
-10 to 40℃
Thermo label

Anti Rolling Gyro
Model:MSM-37500T-A1
−9 −
DANGER
Do not use the ARG, if there is any
oil leakage from the damper.
If there is any oil leakage from the damper,
contact the Sales Agent.
Not doing so could result in damage to the
ship, malfunction of the ARG or injury.
Connect the ship’s ground lead and
the ARG unit’s ground lead.
Connect the ground lead of each Motor
Driver to the ground connection point in
the ship. Ground the ARG unit using
one of the bolts that secure the unit to
the ship.
Not doing so could result in electric shock.
Check installation screws of the
Motor Driver for looseness every
three months.
Re-tighten the four installation screws after
operating the ARG at sea for a month.
After that, make sure that screws are not
loosened every three months.
Not doing so could result in damage to the
ship, malfunction or injury.
oil

Anti Rolling Gyro
Model:MSM-37500T-A1
−10 −
CAUTION
Do not place objects, sit on or step
on the ARG cover.
The ARG cover is not made of
strengthened material.
If you place objects, sit on or step on the
ARG cover, it could result in damage.
During operation, the ARG components
inside the cover are rotating at high speed.
Therefore, the broken ARG cover could
cause injury or malfunction.
Do not allow extraneous materials
and dust to enter through the
blowholes of the ARG.
The ARG cover has blowholes for inside
cooling.
Do not allow extraneous materials and dust
to enter through the blowholes of the ARG.
Doing so could result in malfunction.
Do not use the ARG in locations
exposed to dust.
The ARG cover has blowholes for inside
cooling.
Do not use the ARG in locations exposed to
dust.
Doing so could result in malfunction.
Blowhole

Anti Rolling Gyro
Model:MSM-37500T-A1
−11 −
CAUTION
Be sure to use an exclusive Motor
Driver for the ARG.
Be sure to use the Motor Driver supplied by
MHI.
Not doing so could result in malfunction.
Check bolts and nuts (eight
installation bolts and nuts) for
looseness every three months.
Re-tighten the eight installation bolts or nuts
after operating the ARG at sea for a month.
After that, make sure that bolts or nuts are
not loosened every three months. If you
found loosening bolts or nuts, contact the
Sales Agent.
Not doing so could result in malfunction.

Anti Rolling Gyro
Model:MSM-37500T-A1
−12 −
(1) Pre-operational inspection
Please perform pre-operational inspection shown in table 3-1.
Table 3-1 ARG Pre-operational inspection List（1 / 3 ）
No Inspection
Area Inspection Item Priority Result Countermeasures
1
There must be no
looseness in the
installation bolts, nuts
(eight bolts and nuts)
and spring washer.
○
Re-tighten bolts
or nuts.
Tighten Torque
300N･m
2
There must be no
dust, combustibles/
flammable materials
or seawater / water
near the ARG unit.
◎
3
ARG
installation
There must be
enough ventilation
provided to cool the
ARG down. ○
Improve installation
environment.
4
There must be no
trace of being
exposed to seawater /
water on the ARG
unit.

◎
Contact the Sales
Agent.
(Do not operate the
ARG.)
5
The blowhole of the
ARG unit must not be
closed.
○
6
ARG unit
There must be no
objects on the ARG
cover.
○
Improve the ARG
unit to solve the
problems.

Anti Rolling Gyro
Model:MSM-37500T-A1
−13 −
Table 3-1 ARG Pre-operational inspection List（2 / 3 ）
No Inspection
Area Inspection Item Priority Result Countermeasures
Check the discoloration
of the thermo label as
follows.
①No discoloration
(all white)
②Red orange（70℃）
③Blue （80℃）
④Red （90℃）
7
◎
①②：
No problem
③④：
Problem
Contact the Sales
Agent.
（Change the
Damper）
8
There must be no
oil leakage from the
Damper.
◎
Contact the Sales
Agent.
（Change the
Damper.）
9
ARG unit
There must be no
looseness in the
grounding bolt.
○
Re-tighten
grounding bolt.
Tighten Torque
65N･m
10
There must be no
trace of being
exposed to seawater /
water on the Motor
Driver.
◎
Contact the Sales
Agent.
(Do not operate the
ARG.)
11
There must be no
looseness in the
installation screws
(four screws).
○ Re-tighten screws.
12
There must be no dust,
combustible/flammable
materials or
seawater/water near
the Motor Driver.
◎ Improve installation
environment.
13
Motor
Driver
The blowhole of the
Motor Driver must not
be closed.
○
Improve the Motor
Driver to solve the
problem.
oil

Anti Rolling Gyro
Model:MSM-37500T-A1
−14 −
Table 3-1 ARG Pre-operational inspection List（3 / 3 ）
No Inspection
Area Inspection Item Priority Result Countermeasures
14
Others Check sea area that the
ARG is operated.
・Do not operate under
stormy weather.
・Do not operate
when wave is higher
than 2.0m.
◎ ―