Sfere WDH-31-531 User manual

Motor Protection Controller
User Manual
Applied to：
WDH-31-531
JIANGSU SFERE ELECTRIC CO., LTD.

CONTENT
1 Introduction ...................................................................................................... 1
1.1 Product Overview ..................................................................................1
1.2 Application scenario ..............................................................................3
1.3 Overview of functions ...........................................................................5
1.3.1 Monitoring functions ................................................................. 5
1.3.2 Protection functions ...................................................................6
1.3.3 Control functions ........................................................................7
1.3.4 Communication .......................................................................... 7
1.3.6 Management functions ..............................................................9
1.4 Overview of system components ....................................................... 11
1.5 Order codes ......................................................................................... 13
2. Installation ..................................................................................................... 15
2.1 Size ....................................................................................................... 15
2.1.1 Controller main body installation（5A/25A hole type）......15
2.1.2 Controller main body installation（100A hole type）..........15
2.2 Terminal Wiring ................................................................................... 17
2.2.1 Diagram of connection between main body and display panel
............................................................................................................17
2.2.2 External residual current transformer wiring .........................18
2.3.3 Voltage input wiring .................................................................18
3. Motor protection ...........................................................................................19
3.1Thermal Overload ................................................................................ 19
3.2 Stall ...................................................................................................... 21
3.3 Current imbalance ...............................................................................21
3.4 Phase Loss ............................................................................................22
3.5 Under Load .......................................................................................... 22
3.6 Jam Protection .....................................................................................23
3.7 Short-Circuit .........................................................................................24

3.8 Ground Fault ........................................................................................24
3.9 Residual Current ..................................................................................25
3.10 Start Overtime ...................................................................................26
3.11 Phase sequence .................................................................................27
3.12 Under Voltage ....................................................................................27
3.13 Over Voltage ...................................................................................... 28
3.14 Voltage Imbalance .............................................................................29
3.15 PT Breaking ........................................................................................29
3.16 External Fault .....................................................................................30
3.17 Time tE ( Increased Safety Motor ) ...................................................31
3.18 Thermistor ......................................................................................... 32
4. Motor control ................................................................................................ 33
4.1 Start/stop control logic ....................................................................... 33
4.1.1 Command start and stop ......................................................... 33
4.1.2 External bypass start/stop .......................................................34
4.2 Control authority .................................................................................35
4.3 Power on self-starting .........................................................................36
4.4 Under voltage restart .......................................................................... 37
4.4.1 Instant restart ...........................................................................37
4.4.2 Under voltage restart ...............................................................37
4.5 Analog Output ..................................................................................... 38
4.6 Start mode ........................................................................................... 39
4.6.1 Thermal relay ........................................................................... 39
4.6.2 Direct start ................................................................................40
4.6.3 Reversing .................................................................................. 41
4.6.4 Two speed start ........................................................................42
4.6.5 Star Delta start ......................................................................... 43
5. Communication ............................................................................................. 44
5.1 RS485 network .................................................................................... 44
5.1.1 Network topology .................................................................... 44

5.1.2 Interface definition .................................................................. 44
5.1.3 Related parameters ..................................................................44
5.1.4 Modbus instruction sets .......................................................... 45
6. Operation panel .............................................................................................46
6.1 Panel .................................................................................................... 46
6.2 Control interface ..................................................................................47
6.3 Query interface ....................................................................................48
6.3.1 Running data ............................................................................ 49
6.3.2 Alarm ........................................................................................ 50
6.3.3 Record .......................................................................................50
6.3.4 Maintenance information ........................................................51
6.4 Setting interface .................................................................................. 52
6.4.1 Basic setup ................................................................................53
6.4.2 System Setup ............................................................................ 53
6.4.3 Start control ..............................................................................54
6.4.4 Protection Setup ...................................................................... 55
6.4.5 Self-start Setup .........................................................................56
6.4.6 Restart Setup ............................................................................56
6.4.7 Analog output Setup ................................................................56
6.4.8 Communication Setup ............................................................. 57
6.4.9 Digital input Setup ................................................................... 57
6.4.10 Digital output Setup ...............................................................58
6.4.11 System clock .......................................................................... 59
7. Fault detail ..................................................................................................... 61
8. Technical data ................................................................................................ 63
9. Appendix ........................................................................................................65
9.1Overload protection time characteristic table ................................... 65
9.2 tE Time Protection Characteristic Table ............................................. 65

Version
number
Date
Description
V1.0
2022.04.22
Initial version
V1.1
2022.06.15
Correct some errors
Precautions
This instruction is intended for use by professionals who are trained and familiar with
standards in electrical installation and control and automation engineering.
The responsible person must ensure that the application or use of the product meets all
safety requirements.
Abbreviation
DCS
Distributed Control System
PLC
Programmable Logic Controller
NO/NC
Normal Open / Normal close
DI
Digital input
DO
Digital output
AI
Analog input
AO
Analog output
PTC/ NTC
Thermal resistance input
MC
Main module
SCT
Current transformer module
Related document
WDH-31-530 Modbus-RTU protocol manual

1
1 Introduction
1.1 Product Overview
WDH-31-531 motor protection controller (hereinafter referred to as controller or WDH) is
applicable to the application sites of three-phase low-voltage AC motor with rated
frequency of 50/60hz, rated voltage of 690V AC and rated current of 800A. The product has
the functions of monitoring, control, protection and communication, and provides perfect
protection and control for the motor.
Application
·Low voltage three phase AC motor
·Motor independent control box or MCC cabinet
·Reversing and Reduced voltage applications
·Industrial automation, such as belt-transportation, mixing system etc.
·Fire pumps and fans
Advantages
- A variety of protection functions are built in, and the on / off, alarm or trip functions of the
protection function are programmable
- Rich starting control, single-step starting (direct / two-way, etc.); Two step starting (star
delta / soft start coordination, etc.)
- Under voltage hoisting, power on and self starting function ensure the uninterrupted
operation of the motor
- With residual current transformer, additional residual current transformer and external
wiring can be avoided
- 1-way PTC / NTC thermistor input for motor temperature monitoring and protection
- 5-way programmable switching value input and 4-way programmable relay output
- 2 Channel Programmable 4 ~ 20mA analog output
- Rich SOE event records, tripping, alarm, start stop, input displacement, etc
- Standard RS485 communication interface, optional Modbus RTU or PROFIBUS DP protocol
- Optional Ethernet communication interface with switch function, Modbus TCP protocol
- Optional black-and-white or color Chinese LCD module to visually display and indicate
various parameters, information and status

2
- Equipped with upper computer management software to realize parameter configuration,
debugging and monitoring
- Modular structure design, flexible combination of main body, transformer, display module
and optional function
- The installation method is flexible and the overall size is reasonable. It can be installed in 1
/ 4 drawer cabinet

3
1.2 Application scenario
MOTOR
LOAD
Contator
Phase CT 3
Residual CT1
BUS
Breaker
Fuse
Voltage inputs
METERING
V,A,W,Var,VA,pf,Hz,Wh,Varh
27
27
47 59
51R 49 66 37 46
50G 51G
RS485-Modbus RTU
Voltage
Communication
Digital
inputs
50P
48
68
Relay outputs
HMI
Current inputs
Residual inputs
Thermistor inputs 49
Figure 1 WDH-31-531 Function block diagram

4
131211
UcUbUa
~ 3 M
KM FU3 FU4 FU5
QF
N
L3
L2
L1
T1
L1 L2
T2 T3
L3
14
Un
PTC/NTC
6665
2
1
N
L
1815
1DO
2019
3DO
2221
4DO
FU1
N
L
KM
KM
SB1
QF
QF
Main circuit
Stop Start Run Alarm Fault
START
A
START
B
STOP
RESET
2x2 PIN
5958
B1A1
70 71 72 73 74 75
KM
QF
DIC DI1 DI2 DI3 DI4 DI5
ON OFF
Panel
Monitoring + Protection
Control circuit
Start/Stop + Monitoring
Automation
Remote control + Monitoring
Modbus-RTU
AO1-
30
AO1+
31
17
2DO
16
PTC/NTC
Figure2 WDH-31-531 Typical application diagram

5
1.3 Overview of functions
1.3.1 Monitoring functions
The controller completes the measurement of important electrical parameters (voltage,
current, power, power factor, electric energy, etc.) of the motor circuit through the main
module.
*Direct input line voltage up to 690V
*Direct input current up to 100A (hole type)
* Full wave or fundamental wave measurement mode can be selected
* Residual current can be measured
* Optional measurement of 1-way thermistor
Measuring parameter
Range
Accuracy/Defenition
Voltage
Voltage RMS ( U )
Imbalance ( imb U )
Frequency ( F )
5% ～120%Ue
0% ～100%
45 ～65Hz
1.0% / 0.1V
--- / 0.1%
0.5% / 0.01Hz
Current
Current RMS ( I )
Ground current ( Ig )
Residual current ( Ir )
Sequence current
( I1/I2 )
Imbalance ( unb I )
Thermal capacity ( Cc )
2% ～1000%Ie
2% ～1000%Ie
2%～400%I△n
2% ～120%Ie
0% ～100%
0% ～100%
1.0% / 0.1A
1.0% / 0.1A
1.0% / 1mA
1.0% / 0.1%
--- / 0.1%
--- / 1%
Power
Active Power ( P )
Reactive Power ( Q )
Power Factor ( PF)
Active energy ( EP )
Reactive energy ( EQ )
0% ～120%Pe
0% ～120%Pe
0～±1
---
---
1.0% / 0.01kW
1.0% / 0.01kvar
1.0% / 0.001
2.0% / 0.01kWh
---/ 0.01kvarh
Motor
temperature
Thermistors (PTC / NTC)
0～10kΩ
3.0% / 0.01 kΩ
Table 1. WDH-31-531 Measuring parameter

6
1.3.2 Protection functions
* support multiple ANSI standard protection functions
* Each protection could be selected as drop in or drop out respectively
* Each protection could be configure as alarm/ trip stage respectively
* The protection object could be setting as the circuit breaker for the large current
protection
Protection
ANSI code
Current
Thermal Overload
Under Load (current or power)
Stall
Jam
Current imbalance
Phase loss
Short Circuit
Ground Fault
Residual Current
Start overtime
time tE
49
37
51LR/50S
51R
46
46
50/51
50N/51N
50G/51G
48
Voltage
Under voltage
Over voltage
Phase sequence
Voltage imbalance
PT breaking
27/27P
59
47
46
50P
Non-
electric
Thermistor
External fault
49
68
Table 2.WDH-31-531 Protection overview & ANSI code

7
1.3.3 Control functions
* WDH-31-531 by the main control module to achieve the control of the motor stop/start.
*Main module contains 5 DI, 4 relay output and 2 analog ouput
*By simple programming to achieve the logical control as following:
Motor start type
Uncontrolled ：·Overload relay
Single step starting：
·Direct start
·Reversing
·Two speed
·Electro valve
Double-step starting：
·Star/Delta start
Control authority
·Panel Position
·Local terminal Position
·Remote terminal Position
·Communication control Position
Uninterrupted operation
·Under voltage restart
·On-power self-start
Table 3. WDH-31-531 control functions overview
1.3.4 Communication
RS485
Protocol
Interface
Slave address
Baud rate
Data format
Networking capacity
Modbus-RTU
3-pin terminal
1～247
4800bps～9600bps
N.8.1、0.8.1、E.8.1、N.8.2
< 32

8
1.3.5 I/O interface
DI
·Main control module contains 5 DI
·DI dry contact (internal DC24V)
·Each DI function could be customized
DI：Setting descriptions
Function
Descriptions
Contactor state
Local Start
Local Stop
Local STA/STP
Remote Start
Remote Stop
Remote STA/STP
Emergency Stop
Interlock Stop
External Fault
L/R Switch
Contactor auxiliary contact feedback signal for monitoring
Local terminal start signal input
Local terminal stop signal input
Local terminal start, stop signal input
Remote terminal start signal input (connected to DCS output signal)
Remote terminal stop signal input (connected to DCS output signal)
Remote terminal start, stop signal input (connected to DCS output signal)
Emergency stop signal input (no control permission limit)
Interlocking stop signal input (no control permission limit)
External fault signal input, can be connected to non-electrical sensors, relays,
etc.
Local, remote control permission switching signal input, generally connected
to the switch
Table 5. WDH-31-531 DI common functions

9
Relay output
·Main control module contains 4 relay output(1NC/3NO)
·Functions of each relay output could be customized
Relay output：Function customized
Function
Descriptions
start A
start B
protection trip
Short circuit fault
Self-diagnostic output
Device ready output
Running signal output
Total alarm signal
Total trip signal
Start control relay A output for single step start
Start control relay B output for double step start
Trip relay or stop relay output
Large current overflow fault relay output, connected to circuit
breaker OFF coil
Device equipment fault diagnosis relay output
Device ready relay output (no fault + no stop signal + circuit
breaker in position)
Motor running status signal output
Motor alarm status signal output
Motor fault status signal output
Table 6. WDH-31-531 Relay common functions
1.3.6 Management functions
The data management of the motor protector is accomplished by the main control module
and could be record the relative data by the display module or the communication interface.
Motor running data management
·Current maximum current during a starting process
·Maximum current during historical starting process
·The maximum current of the current running process
·Maximum current during historical operation
·current running time
·Accumulated running time
·Current stop time
·Total stop time
·Start and stop operations
·Contactor ON/OFF times
·The total number of alarms & trips
·The latest modification of parameter information
SOE record
·12 times Trip Record
·12 times Alarm Record
·12 times Start Record
·12 times Stop Record

10
·12 times DI Switch Record
·12 times Reset Record
Table 7. WDH-31-531 Management functions overview

11
1.4 Overview of system components
Components
Image
Descriptions
Special protective type current transformer
Hole type(25A)
5A (0.2A～5A)
25A (2.5A～25A)
-Three phase current
measurement access
-It must be installed integrally
with the main body
(splicing type)
-100A current perforated
access
-If the circuit current exceeds
100A, an external primary
transformer is required
Hole type(100A)
100A (10A～100A)
Main control module
Main control module
(RS485)
· din rail mounted
(Integrated with the
transformer)
·Three phase current
measurement
·Three phase voltage
measurement
·Residual current
measurement
·1 circuit thermistor input
·5-way switching value input
·4-way relay output
·1 channel analog output
·1 channel RS485
communication interface
External CT
SHI-ZT40
(core size: 40mm)
·External CT is inevitable for
the current of the main loop is
over 100A
·SHI-ZT40 (300A:5A)
·SHI-ZT40 (500A:5A)
·SHI-ZT40 (800A:5A)

12
SHI-ZT60
(core size: 60mm)
··External CT is inevitable for
the current of the main loop is
over 100A
·SHI-ZT60 (300A:5A)
·SHI-ZT60 (500A:5A)
·SHI-ZT60 (800A:5A)

13
1.5 Order codes
WDH-31-531
Rated current:
Rated voltage:
AC380V
AC660V
5A
300A
AC100V
25A
100A
500A
800A
Type selection by rated current
Code
Range
Motor Power(380VSystem)
Hole size
5A
25A
100A
250A
500A
800A
0.2A～5A
5A～25A
25A～100A
100A～250A
200A～500A
500A～800A
0.13～2kW
2～11kW
11～55kW
45～115kW( External CT 300A:5A)
90～280kW( External CT 500A:5A)
280～400kW( External CT 800A:5A)
Φ10.5mm
Φ10.5mm
Φ18mm
Φ10.5mm
Φ10.5mm
Φ10.5mm
External CT: SHI-ZT40/ZT60
When the rated current of the motor is over 100A, the current of the measuring module
should be at 5A, the external CT is inevitable. The transform ratio should be 500A:5A,
800A:5A etc. The protection accuracy of the CT is 5P10, the measurement accuracy is 0.5
class, 3pcs as 1 set.
SHI-ZT40 (300A:5A)
SHI-ZT40 (500A:5A)
SHI-ZT40 (800A:5A)
SHI-ZT60 (800A:5A)
SHI-ZT60 (500A:5A)
Cable diameter Φ40mm
Cable diameter Φ40mm
Cable diameter Φ40mm
Cable diameter Φ60mm
Cable diameter Φ60mm
Add-on feature (choose one only)
Functions
Type
Descriptions
Analog output
M2
2-way analog output function (transmission
output)
Temperature input
T
1-way thermistor input (0 ~ 10 kΩ)

14
Mode Selection Example
WDH-31-531 -25A/380V
WDH-31-531 -100A/660V + T
Protocol
rated current
rated voltage
DI
Additional function
1*Modbus
25A (5A～25A)
AC380V
DC24V(Passive contact point)
None
1*Modbus
100A (25A～100A)
AC660V
DC24V(Passive contact point)
1*thermistor input