Delta Electronics MVF2000 Series User manual

Delta MVF2000
Medium Voltage Drive
Product Manual
Version: Rev00
English
Release Date: 2021-12
Scope：MVF20 Series
MVF23 Series
Delta Electronics

Preface
The MVF2000, medium voltage drive (MVD), is a high voltage electric
equipment for motor control featuring high product integration, easy and
convenient operation, and excellent performance in a wide range of applications.
This manual provides the guidelines for installation, commissioning,
operation, fault diagnosis and routine maintenance for the MVF2000 medium
voltage drive. To take full advantage of the product functions and ensure the
safety of the operator and the equipment, please read through this manual before
using the equipment, and keep it properly stored for further use.
Please read the contents indicated with “Danger” or “Caution” in this manual
carefully. During usage, if there are any questions which cannot be solved by
means of this manual, please contact our local agent or directly our company. Our
professional technical personnel will serve you promptly.
The operator shall pay special attention to the following items
when operating this product:
Danger!
The MVD earthing terminal PE must be earthed reliably.
The MVD shall not be connected to the high voltage power supply until all
the electric cabinet doors are confirmed to be reliably closed and the cabinet
doors cannot be opened after the MVD is powered on.
The MVD cabinet doors must be kept closed for 15 minutes after the high
voltage is cut off.
The control auxiliary power must be kept connected when the MVD is
connected to high voltage or the power indicator of power cell is on;
otherwise it may cause abnormalities in the functions of the power cell and
damage the cell.

Warning!
Operation by non-professional personnel is prohibited.
When testing the motor or the motor cable individually, the wires between
the motor and the MVD shall be disconnected.
Do not touch the internal control PCB boards of the MVD
before taking electrostatic prevention measures.
Caution!
Wiring operation must be conducted under the guidance of professional
personnel in accordance with the related electric operation safety
standards.
The commissioning, operation and maintenance personnel must wear
insulation shoes and gloves, and two operators are required with one
supervises another on site.
The user cannot change the installation, wiring and parameters of the MVD
on its own after commissioning. If the change is needed, the user must
contact Delta for confirmation.

1
Contents
PREFACE.............................................................................................................................................................. 1
CONTENTS........................................................................................................................................................... 1
I.GENERAL .......................................................................................................................................................... 3
1-1 PRODUCT CHARACTERISTICS ......................................................................................................................... 3
1-2 MAJOR APPLICATION..................................................................................................................................... 4
1-3 TECHNICAL PARAMETERS .............................................................................................................................. 4
1-4 MODEL DESCRIPTION..................................................................................................................................... 6
1-5 STANDARDS................................................................................................................................................... 6
II. SYSTEM HARDWARE AND ITS PRINCIPLES....................................................................................... 12
2-1 SYSTEM HARDWARE .................................................................................................................................... 12
2-1-2 Power cell cabinet (compartment)...........................................................................................15
2-1-3 Transformer cabinet (compartment)........................................................................................16
2-1-4 Junction cabinet(compartment) ...............................................................................................18
2-1-5 Switch and indicator on the cabinet door...............................................................................18
2-2 PRINCIPLES.................................................................................................................................................. 19
2-2-1 Main circuit..................................................................................................................................19
2-2-2 Power cell ...................................................................................................................................20
2-2-3 Control system...........................................................................................................................21
III. HUMAN-MACHINE INTERFACE ........................................................................................................... 23
3-1 HMI MAIN INTERFACE ................................................................................................................................. 23
3-2 SYSTEM STATUS........................................................................................................................................... 24
3-3 POWER CELL ............................................................................................................................................... 26
3-4ALARM FAULT ............................................................................................................................................. 27
3-5 SETTING ...................................................................................................................................................... 29
IV. DESCRIPTION OF FUNCTIONAL PARAMETERS............................................................................... 33
4-1 SYSTEM PARAMETERS.................................................................................................................................. 33
4-2 MOTOR PARAMETERS .................................................................................................................................. 37
4-3 PROTECTION PARAMETERS .......................................................................................................................... 41
4-4 I/O CONFIGURATION .................................................................................................................................... 53
4-5 FUNCTION PARAMETERS .............................................................................................................................. 55
4-6 MULTI MOTORS PARAMETERS STORAGE ..................................................................................................... 72
V. OPERATION .................................................................................................................................................. 76
5-1 POWER-ON................................................................................................................................................... 76
5-2 STARTUP...................................................................................................................................................... 76
5-3 STOP............................................................................................................................................................ 77
5-4 POWER-OFF ................................................................................................................................................. 78
VI. TRANSPORTATION, STORAGEAND INSTALLATION............................................................................ 79
6-1 PACKAGING ................................................................................................................................................. 79
6-2 TRANSPORTATION,LOADING AND UNLOADING............................................................................................. 81
6-3ACCEPTANCE CHECK.................................................................................................................................... 82
6-4 UNPACKING &HANDLING............................................................................................................................ 82
6-5 STORAGE ..................................................................................................................................................... 86
6-6 INSTALLATION ............................................................................................................................................. 87
6-6-1 Installation environment............................................................................................................87

6-6-2 External dimension....................................................................................................................87
6-6-3 Cabinet ready in position..........................................................................................................87
6-6-4 Cabinet attachment ...................................................................................................................87
6-6-5 Anchoring Cabinets to Foundation..........................................................................................89
6-6-6 Power Cable and Control Cable Entry ...................................................................................89
6-6-7 Protective Grounding Connection...........................................................................................91
6-6-8 Power cell installation................................................................................................................92
VII. SYSTEM WIRING ..................................................................................................................................... 93
7-1 WIRING OF THE PRIMARY LOOP.................................................................................................................... 93
7-2 CONTROL POWER WIRING ............................................................................................................................ 93
7-3 CONTROL LOOP WIRING ............................................................................................................................... 94
7-4 TYPICALAPPLICATION WIRING MAP............................................................................................................. 96
7-5 CAUTIONS.................................................................................................................................................... 96
VIII. COMMISSIONING................................................................................................................................... 98
8-1 COMMISSIONING PREPARATIONS.................................................................................................................. 98
8-2 COMMISSIONING PROCESS ........................................................................................................................... 99
8-2-1 Personnel coordination during commissioning......................................................................99
8-2-2 Commissioning acceptance.....................................................................................................99
IX. TROUBLESHOOTING............................................................................................................................. 100
X. MAINTENANCE..........................................................................................................................................110
10-1 STANDARD MAINTENANCE PROCESS.........................................................................................................110
10-2 MAINTENANCE PLAN ................................................................................................................................111
10-3 DAILY MAINTENANCE RECORD ................................................................................................................ 120
XI. SAFETY ...................................................................................................................................................... 121
XII. ORDERING INSTRUCTIONS................................................................................................................ 122
ANNEX A........................................................................................................................................................... 123
ANNEX B........................................................................................................................................................... 124
MVF2000 ELECTRICAL PARAMETERS AND DIMENSIONS TABLE....................................................................... 124
MVF2000 outline drawings shown below:......................................................................................124
MVF2000 dimensions are shown below:........................................................................................124
ANNEX C .......................................................................................................................................................... 126
MVF2000 OPTIONAL DEVICE DESCRIPTION.................................................................................................... 126
1. Filter Cabinet ...................................................................................................................................126
ANNEX D .......................................................................................................................................................... 128
MODBUS COMMUNICATION........................................................................................................................... 128
1. Communication protocol ..................................................................................................................128
2. Communication command code........................................................................................................128
3. MODBUS Addresses of Various Parameters ....................................................................................128

3
I.General
1-1 Product characteristics
The Delta MVF2000 medium voltage drive is a high voltage alternating current speed
regulating device developed and produced by Delta Electronics. The product features
comprise of excellent performance, easy and convenient operation and a wide range of
applications using IGBT power devices and complete digital control.
1. High efficiency and low distortion
By using multi-pulse input rectification transformer technology, which efficiently lowers
the content of the power side distortion current to less than 5%. It meets the IEEE
519-1992 standard and the strict requirements of electric grids for distortion, and
enhances the power factor to more than 0.96 lagging;
By using cell cascaded multilevel technology without the need of an output filter and with
an output voltage waveform similar to sine wave output; the dv/dt is small, which is
applicable to long cable motor installations without any damage to the cable and motor
insulation;
System efficiency >98.5% (at rated frequency, excluding transformer)
2. Tolerant to power disturbances and wide applicable scope
When the input voltage is as low as 70%, the system can still continuously conduct
derated operation;
With automatic output voltage adjusting function, when the input voltage fluctuates from
90% to 110%, the output voltage can still be kept steady, thus realizing safe and steady
operation of the motor.
3. High reliability
SOA design ensures that the system operates in a wide safe range: (1) sufficient design
margin makes sure that each device operates in the middle area of the safe operating
area; (2) optimized thermal design ensures temperature margin for the devices; (3) the
dc-link capacitors are designed for long lifetime service.
Redundant auxiliary control power.
The system provides a self-diagnosis function to show the position and type of failure and
warn the user about the fault occurrence.
Automatic detection and warning function for cooling fan failure or excessive dust in the
inlet air filter notifying the user to conduct maintenance.
The strict Delta’s quality assurance program, production quality management, control
flow process, and perfect test equipment and methods ensure the effective
implementation of each test item for devices, components and units during the
manufacturing process.
4. Site flexibility
The compact structure and high power density of MVF2000 can reduce the requirements
for site space.

The electric connections between the cabinets use highly reliable connectors which are
easy to install and maintain.
Friendly human-machine interface, easy to operate.
Sufficient communication interfaces, which can be professionally configured in
accordance with the application requirements.
All PCBs are coated to avoid problems with pollution and corrosive environment.
1-2 Major Application
The MVF2000 series is applied for speed control of square torque loads such as fans,
pumps, and compressors, as well as for mills, crushers, and conveyor belts that require
constant torque operation over the entire speed range. Accurate speed and torque controls
result in better energy saving, improved process quality, and prolonged equipment lifetime.
Various industry segments that require reliable and stable operation can benefit from
MVF2000’s high performance:
Power Generation: coal mills, blower fans, and water pumps.
Metallurgy: conveyor belts, positive displacement pumps, fans, and water pumps.
Mining: crushers, conveyor belts, PD pumps, fans and water pumps.
Petrochemical: compressors, PD pumps, centrifugal pumps, fans and water pumps.
Cement & Materials: crushers, mixers, extruders, rotary kilns, drying furnaces, fans and
water pumps.
Sugar & Ethanol: mills, pumps, and fans.
Municipal works: water supply pumps, sewage pumps, heat network pumps.
1-3 Technical parameters
MVF2000
System technology
IGBT-based cascaded power cell connection technique
Efficiency
>98.5% at rated speed and rated input voltage; excluding
transformer
Input
Voltage range
-10% to +10% (normal operation); -10% to -30% (derated
continuous operation)
Frequency
50Hz (-2% to +2%)
Control power
Default with single phase 220 Vac.
Option with single phase 600, 480, 400, 347, 277, 240, 208 or
120 Vac
Input current distortion
Meets IEEE519 standard, without input filter
Power factor
>0.96 (at rated)
Output
Voltage
3.3kV, 6.6kV, 11kV
Frequency range
0.5~75Hz
Overload capacity
110% per min/10 min.
Start-up torque
130% rated torque (standard)
Speed regulation range
1%~100% (with speed sensor),

5
MVF2000
5%~100% (without speed sensor)
Speed control
resolution (steady
state)
±0.1% (with speed sensor, depending on sensor accuracy), ±
0.5% (without speed sensor)
Speed response
bandwidth
60rad/s (with speed sensor), 20rad/s (without speed sensor)
Current response
bandwidth
600rad/s
Control
Parameters
Control method
Vector control with and without encoder (speed sensor)
PID function
Built-in PID regulator with configurable parameters
Modulation method
SVPWM
Speed acceleration &
deceleration time
0~3600s (configurable)
Protections
Input over current, input phase loss, input power loss, input
under voltage, input over voltage, input grounding, input
sequence fault, output over current, output over load, output
phase loss, output grounding, output phase imbalance, output
under load, electronic motor thermal protection, motor stall,
motor reverse, motor over speed, motor under speed, speed
setting analog loss, encoder abnormal, external fault, current
sensor power fault, input current sampling fault, output current
sampling fault, motor winding over temperature (If this
protection is needed, motor over temperature sensing is
required, please contact Delta for customization ), motor
bearing over temperature (If this protection is needed, motor
over temperature sensing is required, please contact Delta for
customization ),air filter clogged, upstream main circuit
breaker abnormal open, HV cabinet door open, control power
loss, transformer over temperature, PLC-DSP communication
failure, cooling fan abnormal, UPS under voltage, fan power
loss, transformer temperature sensor loss, PLC battery
voltage low, PLC-HMI communication failure, upstream main
circuit breaker close/open failure, cooling fan failure
Functions
speed ramps selection, S-curve, frequency skip, multi-point
V/F, torque boost, AVR, dead-band compensation, Jog, flying
start, DC braking, field weakening, energy saving operation,
droop control, speed feedforward control, over-voltage
prevention during deceleration, power cell symmetrical
bypass, negative sequence compensation, input under voltage
derating, low voltage ride through, automatic restart.,
synchronous transfer, multi motor parameter storage, system
auto bypass
Analog input
0~10V/4~20mA, 2 channels

MVF2000
Analog output
0~10V/4~20mA, 4 channels
Digital input / output
20 digital inputs, 10 digital outputs
Human-machine
interface
English / Chinese touch-screen LCD display
Display parameters
Target speed, output speed, input & output currents and
operation status indication
Communication
interface
Standard: Modbus RTU, Ethernet IP
Communication
protocol
MODBUS
Operation
environment
Operation temperature
0oC to +40oC (normal operation)
Storage/transportation
temperature
-40oC to +70oC
Relative humidity
5% to 95%, no condensation
Altitude
<1000m (normal operation), derated use at higher altitude
Structure
Dimension and weight
For the details, see the specification table.
Color
RAL7035 (or tailored according to the color code provided by
the customer)
Cooling
Forced air cooling
Protection level
IP42
1-4 Model description
1-5 Standards
Standard No.
Standard Name
GB/T 156-2007
Standard Voltages
GB/T 1980-2005
Standard Frequencies
GB/T 2423.10-2008
Environmental testing for electric and electronic
products - Part 2: Test methods - Test Fc: Vibration
(sinusoidal)
GB 2681-81
Colors of insulated conductors used in electrical
assembly devices
GB 2682-1981
Colors of indicator lights and push-buttons used in

7
Standard No.
Standard Name
electrical assembly devices
GB/T 3797-2005
Electrical control assemblies
GB/T 3859.1-93
Semiconductor convertors - Specification of basic
requirements
GB/T 3859.2-93
Semiconductor convertors - Application guide
GB/T 3859.3-93
Semiconductor convertors - Transformers and reactors
GB 4208-2008
Degrees of protection provided by enclosures (IP
code)
GB/T 4588.1-1996
Sectional specification: Single and double sided
printed boards without plain holes
GB/T 4588.2-1996
Sectional specification: single and double sided printed
boards with plated-through holes
GB 7678-87
Semiconductor self - commutated convertors
GB/T 10233-2005
Basic testing method for low-voltage switchgear and
control-gear assemblies
GB 12668-90
General specification for speed control assembly with
semiconductor adjustable frequency for A.C. motor
GB/T 15139-94
General technical standard for electrical equipment
structure
GB/T 13422-92
Power semiconductor converters—Electrical test
methods
GB/T 14549-93
Quality of electric energy supply-Harmonics in public
supply network
GB/T 12668.3-2003
Adjustable speed electrical power drive systems Part
3: EMC product standard including specific test
methods
GB/T 12668.4-2006
Adjustable speed electrical power drive systems—Part
4: General requirements—Rating specifications for
A.C. power drive systems above 1000 V A.C. not
exceeding 35 kV
IEEE 519-1992
IEEE recommended practices and requirements for
harmonic control in electrical power systems
IEC 60038
IEC standard voltages
IEC 60071-1:2006
Insulation coordination - Part 1: Definitions, principles
and rules
IEC 60071-2:1996
Insulation coordination –Part 2: Application guide
IEC 60068-2-11
Basic environmental testing procedures - Part 2-11:
Tests - Test Ka: Salt mist
IEC 60146-1-1:2009
Semiconductor converters –General requirements and
line commutated converters –Part 1-1: Specification of
basic requirements

Standard No.
Standard Name
IEC 60146-1-2:2011
Semiconductor converters - General requirements and
line commutated converters - Part 1-2: Application
guide
IEC 60146-1-3:1991
Semiconductor convertors –General requirements and
line commutated convertors –Part 1-3: Transformers
and reactors
IEC 60146-2:1999
Semiconductor converters - Part 2: Self-commutated
semiconductor converters including direct d.c.
converters
IEC 60204-11:2000
Safety of machinery –Electrical equipment of
machines –Part 11: Requirements for HV equipment
for voltages above 1 000 V a.c. or 1 500 V d.c. and not
exceeding 36 kV
IEC 60529:1989+AMD1:1999
+AMD2:2013 CSV
Degrees of protection provided by enclosures (IP
Code)
IEC 60721-3-1:1997
Classification of environmental conditions –Part 3
Classification of groups of environmental parameters
and their severities –Section 1: Storage
IEC 60721-3-2:1997
Classification of environmental conditions –Part 3:
Classification of groups of environmental parameters
and their severities –Section 2: transportation vibration
random, free fall and shock-packaged
IEC 60721-3-3:1994+AMD1:1995
+AMD2:1996 CSV
Classification of environmental conditions –Part 3-3:
Classification of groups of environmental parameters
and their severities –Stationary use at weather
protected locations
IEC 60757:1983
Code for designation of colors
IEC 60947-5-5:1997+AMD1:2005
+AMD2:2016 CSV
Low-voltage switchgear and controlgear –Part 5-5:
Control circuit devices and switching elements –
Electrical emergency stop device with mechanical
latching function
IEC 60076-1
Power transformers - Part 1: General
IEC 60076-11
Power transformers - Part 11: Dry-type transformers
IEC 60076-12
Power transformers - Part 12: Loading guide for
dry-type power transformers
IEC 60076-2
Power transformers - Part 2: Temperature rise
IEC 60076-3
Power transformers - Part 3: Insulation levels,
dielectric tests and external clearances in air
IEC 61378-1:2011
Converter transformers –Part 1: Transformers for
industrial applications

9
Standard No.
Standard Name
IEC 61378-3:2015
Converter transformers –Part 3: Application guide
C57.12.01-2015
General Requirements for Dry-Type Distribution and
Power Transformers
C57.12.60-2009
Test Procedure for Thermal Evaluation of Insulation
Systems for Dry-Type Power and Distribution
Transformers, Including Open-Wound, Solid-Cast, and
Resin-Encapsulated Transformers
C57.12.91-2011
IEEE Standard Test Code for Dry-Type Distribution
and Power Transformers
C57.12.58-2017
Draft Guide for Conducting a Transient Voltage
Analysis of a Dry-Type Transformer Coil
C57.124-1991
Detection of Partial Discharge and the Measurement of
Apparent Charge in Dry-Type Transformers.
IEC 60721-3-1
Classification of environmental conditions - Part 3
Classification of groups of environmental parameters
and their severities - Section 1: Storage
IEC 60721-3-2
Classification of environmental conditions - Part 3:
Classification of groups of environmental parameters
and their severities - Section 2: Transportation
IEC 60721-3-3
Classification of environmental conditions - Part 3-3:
Classification of groups of environmental parameters
and their severities - Stationary use at weather
protected locations
IEC 61000-2-1:1990
Electromagnetic compatibility (EMC) - Part 2:
Environment - Section 1: Description of the
environment - Electromagnetic environment for
low-frequency conducted disturbances and signaling in
public power supply systems (Immunity only)
IEC 61000-2-4
Electromagnetic compatibility (EMC) - Part 2-4:
Environment - Compatibility levels in industrial plants
for low-frequency conducted disturbances
EN 61000-4-2:2009
Electromagnetic compatibility (EMC). Testing and
measurement techniques. Electrostatic discharge
immunity test (Immunity only)
EN 61000-4-4:2004+A1:2010
Electromagnetic compatibility (EMC). Testing and
measurement techniques. Electrical fast
transient/burst immunity test (Immunity only)
EN 61000-4-5:2006
Electromagnetic compatibility (EMC). Testing and
measurement techniques. Surge immunity test
(Immunity only)
EN 61000-4-6:2009
Electromagnetic compatibility (EMC). Testing and
measurement techniques. Immunity to conducted

Standard No.
Standard Name
disturbances, induced by radio-frequency fields
(Immunity only)
IEC 61000-4-7:2002+AMD1:2008 CSV
Electromagnetic compatibility (EMC) –Part 4-7:
Testing and measurement techniques –General guide
on harmonics and inter-harmonics measurements and
instrumentation, for power supply systems and
equipment connected thereto
EN 61000-4-8:2010
Electromagnetic compatibility (EMC). Testing and
measurement techniques. Power frequency magnetic
field immunity test (Immunity only)
EN 61000-4-11:2004
Electromagnetic compatibility (EMC). Testing and
measurement techniques. Voltage dips, short
interruptions and voltage variations immunity tests
(Immunity only)
IEC 61000-2-5:2017 RLV
Electromagnetic compatibility (EMC) –Part 2-5:
Environment –Description and classification of
electromagnetic environments
IEC 61800-3
Adjustable speed electrical power drive systems - Part
3: EMC requirements and specific test methods
IEC 61800-4
Adjustable speed electrical power drive systems - Part
4: General requirements - Rating specifications for a.c.
power drive systems above 1000V a.c. and not
exceeding 35kV
IEC 61800-5-1
Adjustable speed electrical power drive systems - Part
5-1: Safety requirements - Electrical , thermal and
energy
IEC61800-9-2
Adjustable speed electrical power drive systems-
Part 9-2: Ecodesign for power drive systems, motor
starters, power electronics and their driven
applications-Energy efficiency indicators for power
drive systems and motor starters
ISO/EN 12944-2
Paints and varnishes- corrosion protection of steel
structures by protective paint system –Part 2:
Classification of environments
GR-63, Issue 4:2012
NEBS Requirements: Physical Protection
NR-10
Safety in electrical Installations and Services
NEMA MG 1-2016
Motors and Generators: Part 30 Application
Considerations for Constant Speed Motors Used on a
Sinusoidal Bus
with Harmonic Content and General Purpose Motors

11
Standard No.
Standard Name
Used With Adjustable-Voltage or
Adjustable-Frequency Controls or Both

II. System hardware and its principles
2-1 System hardware
The MVF2000 medium voltage drive consists of a controller cabinet(compartment),
power cell cabinet(compartment), transformer cabinet(compartment) and junction
cabinet(compartment). Other cabinets can be configured in accordance with the customers’
requirements in the actual application, please refer to the Annex C. for details about optional
cabinets.
There are two types of drive frames, Inline type for 11kV drives and All-In-One type for
3.3kV and 6.6kV drives. For the detailed information, please refer to the Annex B. MVF2000
Electrical parameters and dimensions table.
Fig. 2-1-a Inline System structure diagram
Controller
cabinet
Power cell
cabinet
Transformer
cabinet
Junction
cabinet

13
Fig. 2-1-b All in one System structure diagram
Controller
cabinet
Junction
cabinet
Transformer
cabinet
Power cell
cabinet

2-1-1 Controller cabinet (compartment)
The controller cabinet(compartment) is mainly used to lay out the main control system,
PLC, HMI, battery and other accessories. Its internal structure diagram is as shown in Fig.
2-2.
Fig. 2-2 Internal diagram of the controller cabinet
The main control system comprises a main control board, an I/O board, an A/D board,
fiber optical boards (extendable) and a power supply board, wherein the boards are
connected with each other through the bus motherboard. The appearance of the main control
system accommodated in the main control rack configured at the upper part inside the
controller cabinet is as shown in Fig. 2-3.
Fig. 2-3 Appearance of the main control rack
Power supply board
I/O board
A/D board
Main control board
Fiber optical board
Isolation transformer
Power Box
PLC
Control rack
Airflow
pressure switch
Terminal block

15
2-1-2 Power cell cabinet (compartment)
The power cell cabinet(compartment) is mainly used to lay out the power cell and its
accessories, and its internal structure diagram is as shown in Fig. 2-4.
Fig. 2-4-a Internal diagram of the power cell cabinet (In-line)
Fig. 2-4-b Internal diagram of the power cell cabinet (All in one)
Each power cell in the cabinet has the same electrical and mechanical parameters and
can be replaced by each other. The appearance of the power cell is as shown in Fig. 2-5:
Cooling fan
Power cell
Cooling fan
Power cell
Output current
hall sensor
Output current
Hall sensor

Fig. 2-5 Appearance view of the power cell (215A)
The model of the power cell is defined as follows:
PL
PL-power unit
Rated output current(A)
Power cell rated input voltage
MVD Generation code
Rev code: Different revision according to
customer request
Configuration code
Fig. 2-6 Power cell model description
2-1-3 Transformer cabinet (compartment)
The transformer cabinet(compartment) is used to install phase-shift transformer and its
accessories, and its internal diagram is as shown in Fig. 2-7.
Fuse
Input Terminal
Heatsink
Handle
RS—Optical fiber (receive）
TS—Optical fiber (transmit)
COM—Communication fail indicator
DRV—Drive fault indicator
UV—Under voltage indicator
TMP—Over temperature indicator
PWR—Power indicator
OV—Over voltage indicator
CDL—50V dc link voltage indicator
Output Terminal