Nietz SSN Series User manual

Soft Starter SSN / SSA Series
数字式交流电动机软起动器
AC Motor Smart Soft Starter
User Manual
V2.1
NIetz Electrci Co.,Ltd

NIetz Electric Co.,Ltd Soft starter SSN/SSA serie User Manual
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Directory
1. Function and Characteristics …………………………………………………………………… 5
2. Model and Check……………………………………………………………………………………… 6
3. Conditions and Installation……………………………………………………………………… 7
3.1 Conditions……………………………………………………………………………………………… 7
3.2 Installation…………………………………………………………………………………………… 8
4. Operating Principle………………………………………………………………………………… 9
5. Terminals and Wiring…………………………………………………………………………………10
5.1 wiring diagram…………………………………………………………………………………………10
5.2 External terminal…………………………………………………………………………………… 11
5.3 Main circuit wiring…………………………………………………………………………………… 12
5.4 Control circuit wiring …………………………………………………………………………… 12
6. Control Mode ………………………………………………………………………………………… 13
6.1 Voltage ramp………………………………………………………………………………………… 13
6.2 Current limit………………………………………………………………………………………… 13
6.3 Jogging ……………………………………………………………………………………………… 14
6.4 Stopping Mode………………………………………………………………………………………… 14
7. Operating keyboard……………………………………………………………………………………15
7.1 Keyboard Display Instuction……………………………………………………………………… 15
7.2 Function Key Instuction…………………………………………………………………………… 15
8. Parameter Table………………………………………………………………………………………… 16
9. Parameter Settings……………………………………………………………………………………17
9.1 Starting Mode …………………………………………………………………………………………17
9.2 Voltage Ramp parameter settings………………………………………………………………… 18
9.3 Current Limit parameter settings……………………………………………………………… 19
9.4 Jogging parameter settings……………………………………………………………………… 20
9.5 Control mode settings……………………………………………………………………………… 21
9.7 Value Range and Detail Note ………………………………………………………………………24
9.8 Special parameters…………………………………………………………………………………27
9.9 Working State …………………………………………………………………………………… 28

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10. rated current adjusting………………………………………………………………………… 29
11. display current calibration…………………………………………………………………… 29
12. Fault………………………………………………………………………………………………… 30
12.1 Fault display and solutions………………………………………………………………… 30
12.2 Overload protection ……………………………………………………………………………31
13. Test running……………………………………………………………………………………… 32
Appendix1：specifications ………………………………………………………………………… 33
Appendix2：SSA serie Structure Size（ Built-in bypass contactor）………………………34
Appendix3：SSN serie Structure Size（ bypass above）……………………………………… 35
Appendix4：Keyboard shape ande Dimension……………………………………………………… 35
Appendix5：SSNG serie stucture size（bypass above）…………………………………………36
Appendix6：SSN serie Typical wiring diagram. …………………………………………………37
Appendix7：SSA serie Typical wiring diagram ………………………………………………… 37
Appendix8：SSNG serie Typical wiring diagram………………………………………………… 38
Atention：Data Download …………………………………………………………………………… 41

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Manual File Number: 200/201-V2.1-14
Version Number: V2.1
Revision Number:214
Issuance Date: 2014-10-18
1.Overview
This manual is applicable to SSN/SSA serial products.
This manual is intended to guide qualified personnel in the installation and operation of
this products.
In the case of a registered trademark and business ownership,final interpretation right to
this manual is belonged to Nietz Electric Co.,Ltd. Any unreasonable application, especially in
reproduction by third parties and release, is not allowed
Although the information in this manual is checked carefully, but there may be some mistakes.
If you find them, please phone us as soon as possible.
Because this product is improved continuously, so user should regard this manual as the
reference.
The parameters in the manual is only used to describe the product, In order to meet the needs
of the customers, we will improving our products continuously to fulfils the latest technical
criteria.
2.Safty
Pay attention to the Note, warning and tips mentioned in this manual.
Only professional technician can be permitted to install or guide the installation of this
products.
Ensuring the power and specification of the motor is matched to those of this products;
The capacitor is prohibited strictly to be connected with the output terminal (U.V.W) of this
production
The cables connecting to the input and output terminals of this product should be packed well
by insulating tape;
The shell of this product must be connected to the ground reliably;
Make sure the power of this product must be cut off before it is maintained.
This manual is packed with the product. Operator must take it as the guide of this product.
Please read it carefully before using this product.
3. Safty Mark
Warning、Tips and Not
◆ Attention Something can lead to personal injury or death
◆ Warning Something can lead to damage of the device or software.
◆ Note Remind user something related.

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1.Function and feature
SSN/SSA Series digital AC motor soft starter is new type starting equipment with advanced
international level. This equipment designed and manufactured by the technique of power
electronics microprocessor and modern control theory. This equipment can limit the start current
efficiently when the asynchronous motor starts. It is widely applied in the field such as winding
machine, pump, transition and compressor etc. It is the ideal product to replace the traditional
voltage dropping start equipment such as star/triangle conversion, self-coupling voltage dropping,
magnetic control dropping voltage etc.
Function
◆ Reduce the starting current of motor; reduce capacity of power distribution; reduce the
investment cost；
◆ Reduce the start stress; prolong the operation lifetime of the motor and correspond equipments；
◆ Smooth and steady starting and soft stopping; The Water hammer and surge can be avoid；
◆ Several sorts of starting mode, wide range setting of the current and voltage. It can be used
in a lot of load conditions, so the technic can be improved；
◆ Perfect and reliable protection; The safeguard of the motor and relative equipment can be
achieved effectively；
◆ It can be used in the state in which motor should star and stop frequently。
feature
◆ Starting Mode： Based on the load characteristics, different starting mode can the related
parameters can be selected. So the best starting effect can be gained；
◆ Technical Performance： The higher performance microprocessor and software are used, so the
control circuit is simplified. The best perform speed can gained without the adjustment of the
circuit parameters；
◆ Reliability： All the electronic components of this product are selected strictly. Additionally,
the main control board is tested in high temperature environment above seventy-two hours. The
reliability of this product can be guaranteed
◆ Configuration： The modularization configuration and up-in-down-out wiring mode are adopted.
It is easy to used and integrated；
◆ Multi-Protection：The motor protection circuit is not be added if the single product is in
used. Because this product have multiple protection function such as Overload; Line fault;
Over current; the starting time and so on.So the cost can be reduced,the circuit can be
simplified。
◆ Keyboard：Operation of the keyboard is easy. User can set and modify the parameters (for
example, starting, stopping running protection) by this keyboard based on the different load

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condition
◆ Analog signal：4-20mA output analog signal is provided；
◆ Actual power setting：When the rate power of Soft Starter is higher than the power of actual
load, soft starter can be matched to the actual load by modifying the actual current parameter.
So the parameters about starting、running and protection are correct
2.Product Type and Inspection
Each SSN/SSA series soft starter is tested. Only the starter that passes the function and
running test can leave the factory. After receiving the equipment, the user should inspect it
according the steps described below. Please notify the supplier immediately if you find any problem
◆ Check the nameplate：Check the item(s) nameplate catalog number against the purchase order.
Make sure that the equipment you received is matched with the product you ordered。
◆ Inspect whether or not the product is damaged through the delivery, for example: Inner parts
falls off, She11 is deformed or depressed, the wires is loose etc
◆ Quality certificate and user manual: the package of each soft start includes quality
certificate and user manual
SSN/SSA series motor soft starter
Type: SSN/SSA
Voltage: 3φ AC380V
Moter Power: KW
Rated Current： A
Factory Number：
Nietz Electric Co.,Ltd

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3. Environment and Installation
3.1 Environment
The environment is important to the equipment life. So please install the soft starter on the
site described below
◆ Operation Condition for the regular products
Power Supply: Urban power, self-provided substation, diesel generating sets
Three-phase AC: 380V or 660V or 1140V (-10%, +15%), 50Hz.
(note：voltage level should be matched to the rate voltage of the actually motor, user should
explain the voltage level in the purchase order if it is special.)
Motor: Squirrel cage asynchronous motor. (Please explain in the purchase order if it is special)
Start frequency: less than 20 times per hour for Standard products (Please explain in the purchase
order if the motor should be start more frequent)
Cooling: Natural air-cooled or Fan air cooling
IP Code:IP20
Environment condition: If the altitude is above 2000 M, user should select the higher power
equipment
Environment Temperature: -25℃ to +40℃.
Relative humidity: ≤95% (20℃士 5℃) non-condensing, no inflammable，explosive gases, no
conducive dust.
Install in an enclosure with good ventilation. The vibration is less than 0.5G
Structure Form: for the SSN series product, bypass contactor should be allocated by user
for the SSA series product, there is inner bypass contactor
◆ Special conditions
If unconventional products using in the special conditions is needed, please explain in the
purchase order

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3.2 Installation
◆ Direction and Distance
The product must be vertically installed. There should be enough space to dissipate the heat,as
shown in figure 3-1. For the cabinet product, there should be a certain distance between back
door of the product and wall. Therefore it is easy to maintain .
Figure3-1
◆ Cabinet installation
If the product is installed in the cabinet, make sure there are good ventilation in the cabinet.
The products can be installed vertically or horizontally. Horizontal layout shows in Figure 3-2.
Vertical layout shows in Figure 3-3. User can adopt any of them.
Note: If the vertical layout is adopted (especial in fan air cooling mode), a clapboard should
be installed between them to avoid that the upper starter is affected by heat generated by the
lower starter.

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Hot airHot air Hot airHot air
Cool air
Ventilation
Figure3-2
Horizontal layout
Figure3-3
Vertical layout
Soft Starter Soft Starter
4. Operating principle
There are three pairs of anti-parallel thyristors connected to the stator of motor. Using
the electric switch feature of the thyristors, the voltage of the motor can be controlled by
changing the triggering angel of the thyristors. The triggering angel of the thyristors is
controlled by microprocessor. So the motor can be started softer and smooth. After the equipment
is up to full voltage, it outputs a bypass signal. User can use this signal to control the bypass
contactor to supply the motor. See figure4-1.
Moter
R.S.T
3-phase AC power supply
AC 380V/660V/1140V
KM
Votage
detecting drive circuit Current detecting
Computer fuzzy control
Keyboard 、display
U.V.W
Figure 4-1

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5. General wiring and external terminal
5.1 Wiring schematic
Note:
1. There are two wiring ways to control starting and stopping the startor externally. They are
three-line and two-line wiring. (See ①and② in the figure above).Start signal is given by
connecting terminal RUN and COM. Stop signal is given by disconnecting terminal RUN and COM
Connect according the figure①，free stop
Connect according the figure②，soft stop
2. In the SSA series product, there is no terminals U1,V1,W1.Because there is inner bypass
contactor。
3. In the SSA series product, the end of start output terminal（+12V/OC）are used interior.
it is strictly prohibited to external wiring。
4.In SSA series product, There is build-in bypass contactor. External terminals” L” and” N”
are added and External 220V power supply is needed for the product which power is above 90KW.

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5.2 External terminals explain
表 5-1
Terminal Name Terminal function Explanation
Main
circuit
R.S.T Input Connect to three-phase power source through
breaker (QF)
U.V.W Output Connect to three-phase asynchronous motor
U1.V1.W1 Bypass See figure F-6
Control circuit
Digital input
SS Soft stop Connect SS and COM directly, Soft stop①
RUN Start Connect RUN and COM directly, Start①
STOP stop Connect STOP and COM directly, Stop①
JOG jog Connect JOG and COM directly, jog
RET reset Connect Reset and COM directly, reset the
fault
COM common Logic Ground
Digital
output
+12V Internal power supply
terminals
Internal output power supply:
DC12V,100mA 注③
OC Starting end terminals Starting end：OC Conduction
COM common Logic Ground
analog
output
I
4-20Ma output
Load input resistance≤
400Ω
Im=Ie(I-4)/8
COM 4～20mA output reference
Relay output
K14 NO
Fault output
terminals②
In Fault:
K14-K12 close ; K11-K12 open
Contacts capacity
AC:10A/250V DC:10A/30V；
K11 NC
K12 COM
K24 NO
Bypass
terminals②
Starting end：K24-K22close；K21-K22open
Contacts capacity:
AC:10A/250V 或 5A/380V DC:10A/30V
K21 NC
K22 COM
注①：There are two connecting mode, see figure 5-1
注②：Fault,bypass and starting end output terminals are all dry contact。
注③： In the SSA series product, the end of start output terminal（+12V/OC）are used interior.it
is strictly prohibited to external wiring。
Im：motor output current（A）
Ie: motor rate current（A）
I :
4-20mA output current（mA）

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5.3 Main circuit wiring
There are six power terminals for SSAseries product. R, S, T(Power line) and U, V, W(Motor
line).See figure F-5
There are nine power terminals for SSN series product. R, S, T(Power line) and U, V, W(Motor line)
and U1,V1,W1(Bypass line).See figure F-6
5.4 Control circuit terminals
There are control circuit terminals on the main control board. This control circuit terminal
provides convenience for the user to realize remote control and external signal control. User
can connect the corresponding terminals according to the actual state. By setting the parameter,
user can select keyboard mode or terminal mode by to control product to start and stop. There
are three terminals, X1(10 bit) and X2(6 bit), for detail see figure 5-2 below.
RET COMSTOP JOGRUN SS
X1
Soft Stop
K24 K22 K14 K12 K11
X2
Bypass Control The Fault Outpot
I COM
4-20mA Outpt
K21
Figure 5-2
Free Stop
Run Jog
Reset
Common
+12V OC
Starting Outpot
Note:For detail see table 5-1
Note:In SSA series product, There is build-in bypass contactor. External terminals” L” and”
N” are added and External 220V power supply is needed for the product which power is above 90KW.
L N
AC 220V
1 2 3

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6. Control mode
This product has three start modes: Current Limit and Voltage Ramp and jogging. These start modes
is independent. Only one of them can be chosen. Text below introduce that the different of them
and which mode should be selected.
6.1 Voltage Ramp
The waveform of the voltage shows in Figure 6-1. U1 in figure is initial output voltage. When
starting, the output voltage is up to U1 immediately, and then ramps up gradually according to
the parameter Start Time “t” setting in advance. Then the motor accelerates continuously. When
the output voltage reaches the rate value Ue, the motor reaches the rate speed. Starting process
is finished. The Initial Voltage U1 and the Start Time t can be set according to the load. The
range of U1 is 5~75%Ue, and the range of t is 1~200s.
This mode is used in the state with large inertia load, or in the state in which the current is
not the important parameter but the stability is important. Using the mode, the mechanical stress
and starting striking may decreased greatly. The bigger the initial voltage is, the more the
initial torque and starting striking is. The time of starting is related to the parameter of
“starting time” and load. It is unconcerned with current limited. For detail see chapter 8 and
chapter 9.
6.2 Current Limit
At the Current Limiting mode, the output voltage increases quickly until the output current
reaches the limited current value Im. See figure 6-2. And then the output current maintains below
this limited value. Then the output voltage is increased gradually, and the motor accelerate
gradually; when the motor's speed is close to the rated，the output current decreases quickly
to the rated value Ie, the starting is over. The limited current value can be set according to
the load instance. The range of this parameter is 0.2-4Ie.
This mode is used in the state in which the current is very important parameter. Special in the
state in which the grid capacity is small. The parameter of the current limit multiples should
be set 2.5-3. If this value is small, the starting will be abnormal. At this mode, the time of
电压斜坡起动
U e
U
U 1
t1 t 2 t 3
t
图 6-1
Voltage Ramp
Figure 6-1

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starting is concerned to the parameter of the current limit multiples. The more this value is,
the shorter the time of starting is. Vice versa. For detail see chapter 8 and chapter 9.
6.3 Jogging
At this start mode, the output voltage reaches the initial voltage U1 quickly, and remains
unchanged. Changing the U1, the output voltage and torque of the motor will change corresponding.
(See figure 6-3). It is convenient to judge the director of the motor.
6.4 Stop Mode
There are two stop mode, user can set this parameter according to load and working condition.
● Free stop
When receiving the stop signal, the terminals K22,K24 is open, the bypass contactor is disconnect.
The trigger signal of the SCR module is close at the same time. Motor inertia stop according the load.
● soft stop
At this stop mode, when receiving the stop signal, the bypass contactor is disconnected. At the
same time, motor is controlled through SCR. The output voltage decreases gradually. At last motor
stop completely. The stop time is related to the parameter of load and factor of soft stop time.
To gain the smooth stop effect, the “soft stop time”should be set carefully.
I
I e
t
I m1
I m2
I m3
图 6-2
Figure 6-2
图 6-3
U
U 1
＇
t
U 1
U 1 ＇＇
Figure 6-3

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7. Keyboard
7.1 Keyboard Description
There is a Keyboard on the front of the soft starter. User can operate it to display data,
save data, check data, display fault, reset fault, start or stop the motor etc. The construction
of the keyboard shows in figure 7-1.
Voltage Ramp Mode
Current limiting mode
Unit indicator
Function code display Data code display
Programming key
Data modification keys
Start key
Stop Key Reset Key
Figure 7-1
7.2 Key Function
There are five key on the keyboard: RUN (start), STOP (stop), PRG (program) ▲ (increase), ▼
(decrease)
● RUN (start)：When the system is on ready stateSr8rdy, press this key, the motor start according
the start mode user set.
● STOP（stop）：When the system is on starting or running state, press this key, the motor stop,
then the system enter ready stateSr8rdy. When the system is on setting state,
press this key, system enter ready stateSr8rdy, and the parameter user modified
is saved at the same time. When the system is on fault state, the fault code shows
on the keyboard. Press this key, release it 5 minutes later, system enter ready
state Sr8rdyif the fault is deal with.
● PRG(program）: On ready state, press this key, release it 5 minutes later, system enter setting
state. On setting state, user can switch between different parameter groups
● ▲（increase）: On SETTING state, user can increase the parameter value by press this key。
● ▼（decrease）: On SETTING state, user can decrease the parameter value by press this key。
Note: 1. On SETTING state, press PRG key or STOP key, the modified data are saved automatically.

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2. If user selects external control, the keyboard can be taken off after all the parameters set.
8.Parameter function table
Table 8-1
NO. DISPLAY Name Range and mean The default
value Remarks
1
A08888 Starting mode 1：Ramp▲ 2：limit★ 3:jog■
1 ▲ ★ ■
2
A18888 Initial voltage 5%~75% of Supply Voltage 30 ▲
3
A28888 Jog voltage 5%~75% of Supply Voltage 30
■
4
A38888 Ramp time （1-120）S 30 ▲
5
A48888 Curr. Limit Level
20%~400% of rated current 300 ★
6
A58888 Curr. Limit time
（1-120）S 30 ★
7
A68888 OverCurr.protect
400%~600% of rated current 400 ▲ ★ ■
8
A78888 unbalance factor
5%~50% of present current 30 ▲ ★ ■
9 A88888 Control Mode
1：keyboard control
2：external control
3：keyboard and external
3 ▲ ★ ■
10 A98888 SCR trigger
select
1: close trigger
2：not close trigger
3：close trigger,show b-p②
2 ▲ ★
11 Ab8888 Start overload
level 1-8 4 ▲
★
12 Ac8888 Over running
current protect 20%~400% of rated current 200 ▲
★
13 Ad8888 Stop mode select
①
1：free stop
2：soft stop(ramp) 1 ▲
★
14 Ar8888 Soft stop time
factor 1-10 5 ▲
★
15 IE8888 rated current See chapter9.7 and 10 Motor current
16
Er8888 Fault See chapter12
17
Sr8rdy Ready state User can't modify
Note：▲：It is valid at Voltage Ramp mode.。
★：It is valid at Current Limit mode。
■：It is valid at Jogging mode 。
①： Parameter “stop mode select” is valid when control mode is keyboard. If the external control
mode is selected, stop mode is determined by external line. For detail see figure 5-1。
②： If the parameter A98888 is set 3, Sr8b-p displays in the keyboard, and the product can’t monitor
the state, and the protection is lost.

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9.Parameter setting
9.1 Starting mode
On READY stateSr8rdy, press PRG key and release it 5 minutes later (or press PRG and ▼ key
at the same time), system enter the Starting mode selecting state A08888. Then press ▲or▼ key to
modify the parameter to set the “starting mode code”. IF “1” is selected, the lamp on the top-left
of the keyboard “voltage ramp” is light, the Starting mode is voltage ramp. If “2” is selected,
the lamp on the top-left of the keyboard “current limit” is light, the Starting mode is voltage
ramp. If “3” is selected, the starting mode is jogging. Any lamp on the left of keyboard is not
light. After the starting mode parameter is selected, press PRG key, other parameter at selected
Starting mode can be modified.
For Example:
Note:
Normally the voltage ramp mode and current limit mode are adopted. User can select the Starting
mode according to the load type. For the normal load, any of two modes can be adopted. But for
big inertia load type, the Voltage Ramp mode is the best choice. The default value is 1, that
Voltage Ramp mode.
Sr8rdy
Press PRG
（maintain 5 second
）
OR PRG +
▼
PRESS▲ OR▼
A08881
voltage ramp
current
Jogging
A08881
A08882
A08883
A08881

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9.2 parameter setting and inquiry(Voltage Ramp)
If the voltage ramp mode is selected, the flow chart of the related parameters setting is show
in figure 9-2
Voltage ramp mode A08881
pressPRG
Initial voltage of ramp A18830 press▲or▼ to modify
pressPRG
State time of ramp A38830 press▲or▼ to modify
pressPRG
Over current protect value A68400 press▲or▼ to modify
pressPRG
Current unbalance factor A78830 press▲or▼ to modify
pressPRG
Control mode select A88881 press▲or▼ to modify
pressPRG
SCR trigger select A98882 press▲or▼ to modify
pressPRG
Start overload level Ab8884 press▲or▼ to modify
pressPRG
Over running current protect Ac8200 press▲or▼ to modify
Stop mode select Ad8881 Ad8882 press▲or▼ to modify
pressPRG
Soft stop factor Ar8885 press▲or▼ to modify
pressPRG
figure9-2
note：
1. When any of one parameter is selected, press whether PRG key (change page) or STOP key to return
READY state Sr8rdy, the modified parameters will be saved automatic.
2.When modify any of the parameter, press STOP key to return the READY stateSr8rdy.

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9.3 parameter setting and inquiry(Current Limit)
If the Current Limit mode is selected, the flow chart of the related parameters setting is
show in figure 9-3。
Current Limit mode A08882
pressPRG
Starting current limit A48300 press▲or▼ to modify
pressPRG
Start time A58830 press▲or▼ to modify
pressPRG
Over curr. protect value A68400 press▲or▼ to modify
pressPRG
Current unbalance factor A78830 press▲or▼ to modify
pressPRG
Control mode select A88881 press▲or▼ to modify
pressPRG
SCR trigger select A98882 press▲or▼ to modify
pressPRG
Start overload level Ab8884 press▲or▼ to modify
pressPRG
Over running current protectAc8200 press▲or▼ to modify
Stop mode selec Ad8881 Ad8882 press▲or▼ to modify
pressPRG
Soft stop factor Ar8885 press▲or▼ to modify
pressPRG
figure9-3
NOTE:
1. When any of one parameter is selected, press whether PRG key (change page) or STOP key to return
READY state Sr8rdy, the modified parameters will be saved automatic.
2. When modify any of the parameter, press STOP key to return the READY stateSr8rdy.

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9.4 parameter setting and inquiry(Jogging)
The Jogging mode is used in the state of device location and the motor director judged and
the 3-phase current balance tested. In Jogging mode, the voltage maintain unchanged. The flow
chart of the related parameters setting is show in figure 9-4
Jogging mode A08883
pressPRG
Jogging voltage A28830 press▲or▼ to modify
pressPRG
Over curr. protect value A68400 press▲or▼ to modify
pressPRG
Current unbalance factor A78830 press▲or▼ to modify
pressPRG
Control mode select A88881 press▲or▼ to modify
Press PRG
Figure 9-4
NOTE:
1. When any of one parameter is selected, press whether PRG key (change page) or STOP key to return
READY state Sr8rdy, the modified parameters will be saved automatic.
2. When modify any of the parameter, press STOP key to return the READY stateSr8rdy.