Santak 20k User manual

Thank you for purchasing our products
Please strictly comply with this manual and machine all warning and
the operating instructions and keep this manual. No reading through
all of the safety instruction and the operating instructions before,
please don’t operate UPS.

Safe declare
Operation safety
1. In the use of the product before, please read “safety declare”, to ensure the correct and safe to use. And please
keep the manual.
2. Pay attention to the all warning when operating, according to the requirements for operation.
3. Avoid direct sunlight, rain or in the wet environment using this equipment.
4. This equipment can not be installed near the heat source area.
5. Placed around the UPS, should have a safe distance, ensure ventilation. When installation, please refer to
specification.
6. When cleaning, please use the dry goods to wipe.
7. In case of fire, please correct use of dry powder fire extinguisher to extinguish fire. If the use of liquid fire
extinguisher will have a risk of electric shock.
8. Before installation should consider floor bearing capacity on the machine and battery.
Warning users:
This is A level UPS product, that may cause radio interference in the living environment, in this case, the users
can take adequate measures.
Electrical safety
1. Before starting ups, please confirm grounding correctly, and check the wiring and polarity is properly connected.
2. When UPS needs to move or to be wiring, please shutdown UPS and disconnect AC input breaker and battery
breaker, or there is a risk of electric shock.
Battery safety
1. Battery life varies with ambient temperature decreases. Regular replacement of batteries can ensure normal work
of UPS, and to ensure adequate reserve time.
2. Battery can only be maintained by qualified personnel!
3. Replace the battery, must use the same type and model of the battery, and the number must be the same.
4. Battery to involve a risk of electric shock and short circuit current risk. To avoid electric shock accident, when
replacing the batteries, please observe the following warning:
A. Don’t wear watches, rings or other metal objects;
B. Using the insulated tools;
C. Wear rubber shoes and gloves;
D. Can not put metal tools or metal parts on the batteries.
E. Before removing the battery terminals, must disconnect the load.
5. Please do not burn the battery in the fire, so as not to cause an explosion, endanger the personal safety.
6. Non professionals do not open or damage battery, because the battery electrolyte contains strong acid and other
hazardous substances, the skin and eyes are hurt. Such as accidentally contact with the electrolyte, should
immediately with plenty of water for cleaning, and go to the hospital to check.
7. Please do not use the battery short circuit, will cause electric shock or fire.
Operating environment
1. Operating environment will affect UPS stability, therefore, please prevent ups operating in this environment:
a. The place beyond rated range (temperature 0-40℃, humidity20-90%);
b. The vibration places;
c. The place contains metal dust, corrosive substances and combustible gas;
2. If UPS do not use in long time, need to store it in dry environment, storage temperature: -25-55℃.

Contents
ChapterⅠProduct description......................................................................................................1-9
1.1 Synopsis...............................................................................................................................................1
1.2 Main configuration...............................................................................................................................1
1.3 Operational principle............................................................................................................................2
1.4 Structure configuration.....................................................................................................................2-4
1.5 Operation mode................................................................................................................................5-6
1.6 Basic function...................................................................................................................................6-7
1.7 Specification.....................................................................................................................................7-9
ChapterⅡInstallation................................................................................................................10-12
2.1 Environmental requirements..............................................................................................................10
2.2 Unpacking..........................................................................................................................................10
2.3 Mechanical size............................................................................................................................10-11
2.4 Transport............................................................................................................................................11
2.5 Method of fix.....................................................................................................................................11
2.6 Terminal Block connect....................................................................................................................12
2.7 Ventilation.........................................................................................................................................12
ChapterⅢWiring......................................................................................................................13-17
3.1 Cable diameter choosing...............................................................................................................13-14
3.2 cable connection...........................................................................................................................14-17
ChapterⅣPower On and Debugging........................................................................................18-19
4.1 Preparation.........................................................................................................................................18
4.2 Function test.......................................................................................................................................19
ChapterⅤLCD panel operation................................................................................................20-36
5.1 LCD panel.....................................................................................................................................20-21
5.2 Display information details...........................................................................................................21-25
5.3 System control..............................................................................................................................25-27
5.4 System setup.................................................................................................................................28-32
5.5 Function setup...............................................................................................................................32-35
5.6 UPS alarm and display.......................................................................................................................36
Chapter VI Operate and maintenance guide..............................................................................37-38
6.1 User Guide....................................................................................................................................37-38
6.2 Maintenance Guide............................................................................................................................38
Chapter VII Fault diagnosis............................................................................................................39
7.1 Fault diagnosis procedure..................................................................................................................39
7.2 Fault information of LED..................................................................................................................39
7.3 Fault information of buzzer................................................................................................................39
7.4 SPD (Surge protect device) (Optional)..............................................................................................39
7.5 LCD display abnormal.......................................................................................................................39
ChapterⅧBattery maintenance......................................................................................................40
8.1 Battery................................................................................................................................................40
8.2 Battery cabinet...................................................................................................................................40
ChapterⅨService...........................................................................................................................41
9.1 Exception Handling............................................................................................................................41
9.2 Technical Support..............................................................................................................................41
AppendixⅠStart and shutdown ups operation process.................................................................42
Appendix 1.1 Procedures of ups on.........................................................................................................42
Appendix 1.2 Procedures of ups shutdown..............................................................................................42

1
ChapterⅠProduct description
1.1 Synopsis
The present specification defines the technical characteristics of the UPS, a device which supplies clean and
stable energy to the connected load. In case of mains failure, the UPS can supply power from battery.
The combination of isolated transformer, the high frequency double-converter structure and advanced DSP
control makes the UPS completely immune to the disturbances of mains input and provide high-quality sine wave
power. Additionally The UPS provides abundant interfaces such as RS232, SNMP, AS400, and RS485 for
supervision and configure.
1.2 Main configuration
The UPS structure mainly const of the rectifier (abbreviated as REC) and the inverter (abbreviated as INV),
bypass STS, output STS, mains input breaker Q1, bypass breaker Q2, repairing breaker Q3, output breaker Q4,
battery breaker B1. The REC transforms AC to DC to power for INV and charge for battery, while the INV
transforms DC to AC.
The main structure of the UPS is shown in Figure 1-1. The default status of B1, Q1-Q4 is off when the UPS is
sent from our factory. For normal operation, switch on B1 first, then Q1, Q2. The UPS will automatically be
powered on. Switch on the UPS from the front panel to make the inverter work and turn on Q4. Never switch on
Q3 otherwise it will make the UPS seriously damaged in normal situation. Q3 can only be operated by qualified
UPS service personnel.
Figure 1-1

2
1.3 Operational principle
C - B U S
R - L 1
R - L 2
R - W 1
R - W 2
R e l 1
R 1
S 1
T 1
L
L
N 1
N
N
B P +
B N -
T - I N

3
234 5
1
6
7
8 9 10 11 12
13
15
14
17
16
18
电池开关
B1
BATTERY
SWITCH
Q4
输出开关
OUTPUT SWITCHMANUAL BYPASS SWITCH
维修旁路
Q3
BYPASS SWITCH
旁路开关
Q2
MAINS SWITCH
主路开关
Q1
警告：非专业人员请不要开启此档板
Back view Right side view
1. Fan 2. RS232 interface 3. SNMP
4. Dry contact interface 5. RS485 interface 6. Switch cover plate
7. Wiring cover plate 8. Main input breaker 9. Bypass breaker
10. Bypass repair breaker 11. Output breaker 12. Battery breaker
13. REC model 14. REC heat sink 15. SCR
16. Winding resistance 17. HCT 18. Backup power supply board
Figure 1-4 20-30KVA UPS
1
正视图 左视图
7
8
6
3
5
4
9 10 11
2
Front view Left side view
1. LCD 2. Wheel 3. Battery contactor
4. Fuse 5. SNUBBER capacitor 6. Inverter
7. BUS capacitor 8. Filter capacitor 9. Inverter capacitor
10. Input inductor 11. Inverter transformer
Figure 1-5 40KVA UPS

4
右视图
后视图
34 5 6
2
1110
98
7
1
12 1513 14
Back view Right side view
1. Terminal block 2. Fan 3. RS232 interface
4. SNMP card 5. Dry contact interface 6. RS485 interface
7. Main input breaker 8. Bypass breaker 9. Repair breaker
10. Output breaker 11. Battery breaker 12. Standby power supply board
13. Output SCR 14. Rectifier 15. Power board
Figure 1-6 40KVA UPS
1
2 3
Overlook view
1. Driver board 2. Control board 3. Power supply board
Figure 1-7 20-40KVA UPS

5
1.5 Operation mode
Line mode
When the mains input is normal, rectifier works to power the inverter and charge the battery. (Figure 1-8)

6
B y p a s s I n p u t
m a i n s I n p u t
O u t p u t
Figure 1-11
Notice: 1. The output voltage interruption time of 20kva ECO mode is less than 25ms;
2. The output voltage interruption time of 30-40kva ECO mode is less than 8ms; Make sure your load can
withstand such power interrupt time.
Dual inputs support
The series UPS supports dual input, that means mains input and bypass input can be separated power supplies. The
configurations of wiring connecting are listed below. (Figure 1-12 and figure 1-13)

7
【Restart when mains input restore function】The UPS can automatically restart when mains input restore in
the case when UPS shuts down for battery exhausting. The combination of this feature and SNMP supervision
makes the UPS work fine without artificial operation.
【Input phase order adaptive function 】The UPS identifies the input phase order and automatically make
output phase order followed. It’s very convenient for wire connection and operation.
【Emergency Power Off function】By pressing the EPO button locating at the top right corner of front LCD
more than 1s, UPS output is disabled.
1.7 Specification
Model
20k
30k
40k
Input
Main input supply
Rated voltage
380VAC(Line voltage)/220VAC(Phase voltage)
Input wiring
3Ф + N + E(Protective earth)
Voltage range
(165±5~275±5)VAC (Phase voltage)
Low voltage lose/recovery
(165±5) VAC /(180±5) VAC (Phase voltage)
High voltage lose/recovery
(275±5) VAC/(260±5)VAC (Phase voltage)
Bypass
Rated voltage
220VAC
Input wiring
Single phase
Voltage range
(165±5~275±5) VAC
Low voltage lose/recovery
(165±5) VAC /(180±5) VAC
High voltage lose/recovery
(275±5)VAC/(260±5)VAC
Input frequency
Rated frequency
50Hz/60Hz
Low frequency lost
46Hz/56Hz
Low frequency recovery
46+0.5Hz/56+0.5Hz
High frequency lost
54Hz/64Hz
High frequency recovery
54-0.5Hz/64-0.5Hz
Input performance
Input power factor
0.7 (Input 185V full linear load)
Generator input
Support (Generator rated power ≥ 2 UPS rated power)
Input current
Rated current
64A
85A
95A
Output
Output power
Rated VA/Watt
20KVA/16KW
30KVA/24KW
40KVA/32KW
Rated voltage
220VAC
Output voltage range
200/208/220/230/240VAC (Output power reduces to 90％208/200V)
Voltage regulation
±2%
THD V
≤8%
≤3%
Voltage transient response
≤9% (Linear load 0%~100%~0%)
Transient response recovery time
≤60mS (Nonlinear load) recovery to 90%
Bypass before turn on
Yes
Crest ratio
3:1
Output frequency range
Line mode
46Hz~54Hz (The same as input frequency)
50Hz (Line frequency>54Hz or line frequency<46Hz)
Battery mode
(50+0.1) Hz
Slew rate
1 Hz/Sec

8
Model
20K
30K
40K
Efficiency
Line mode
> 83% (Full linear load)
Battery mode
> 88% (Full linear load)
Overload function
Line mode/ Battery mode
Overload warning only; 105%±5%≤load
2Min, then transfer to bypass and alarm; 105%±5%<load≤125%±5%
30S, then transfer to bypass and alarm; 125%±5%<load≤150%±5%
0.5S, then transfer to bypass and alarm; load>150%±5%
Automatically recovery
Yes
Short protection
Line mode/ Battery mode
Cut off output after 3s
Transfer time
Line mode to Battery mode
0mS
Battery mode to line mode
0mS
Line mode to Bypass mode
<1mS
Bypass mode to line mode
<1mS
Battery and Charger
Battery
Rated voltage
384VDC
Protection
Low battery alarm/recovery
(361.6V±4V)/ (377.6V±4V)
Battery shutdown voltage
(320V±4V)/ (336V±4V)
Battery protection
Battery overcharge protection
(475V±4V)
Battery detect
Battery missing
Support
Battery failure
Support
Charge
Charge
Float charge voltage
(440±2)VDC
Charge time
Depending on the battery capacity
Charge current
10A (Adjustable)
Interface
Alarm mute
Support
DC boot
Support
Auto Reboot
Support
Alarm function
Battery mode
Beep once every 4 second
Low battery voltage/ Charger
fault
Beep once every second
UPS fault
Beep continuously
Overload
Beep once every second
Bypass
Beep once every 2 minute
Communication interface
RS232/ RS485
Support
Output dry contact
Support
Intelligent slot
Support SNMP/AS400
Supervisory software
Support
Cooling way
Forced air cooling
Show
LCD+LED

9
Model
20K
30K
40K
Environment
Working temperature
0℃~40℃
Altitude
<1000m
Noise
≤70dB
Storage temperature
-15℃~45℃
Work humidity
20%~95%
Standard
EMS/EMI
Conduction
IEC62040-02
Anti-interference
IEC 61000-4-2.4.5 Level IV, IEC61000-4-3 Level III
Radiation
EN55022
Class A
Safety
Safety
GB4943-2001/IEC62040-1
Mechanical properties
Connection
Input
Terminal blocks
Output
Terminal blocks
Battery interface
Terminal blocks
Size
UPS Net weight and size
Wide ×High× Deep (mm)
Net weight(Kg)
Other function
60Hz
Support
Frequency mode
Support
ECO
Support
EPO
Support
Electric parameters
Table of rated voltage and current for system design and wire choosing .figure 1-2
Model
20K
30K
40k
UPS Rated power
20KVA
30KVA
40kVA
Input AC voltage
380V±25% (3Ф + N)
Main input current
64A
85A
95A
Bypass input current
90A
136A
182A
UPS output current
90A
136A
182A
Battery voltage
DC320-440V
Battery input current
62.5A
94A
117A
Figure 1-2 Rated voltage and current

10
ChapterⅡInstallation
2.1 Environmental requirements
■ Operating Temperature: 0~40℃
■ Storage temperature: -15℃~45℃
■ Relative Humidity: 0%~95%
■ Cooling Mode: forced air cooling
■ The Altitude: <1000m
■ Verticality: No vibration and the slope should be less 5°.
■ Pollution Level: Grade Ⅱ
UPS systems should be installed in the clean, cool and ventilated environment. 20-25℃operating temperature
and 50% Humidity are recommended.
◆Note ◆
Combustible, Explosive or Corrosive articles are not allowed to be placed near the UPS. UPS will be damaged
in the environment full of metal conductive dust.
2.2 Unpacking
Equipment should be placed in the environment which meets the requirements; storage time should not exceed 3
months.
Do not remove the packages before transporting the equipment to the installation site to prevent unexpected
damage. Check the attachment according to the inside packing list.
Remove the outer cabinet in the way according to the inside guidelines.
2.3 Mechanical size
The equipments should be fixed in appropriate ways for reliable operation according to the site conditions.
Table 2-1 lists the mechanical parameters of the series UPS power.
Table 2-1
Name
Long
(mm)
Wide
(mm)
High
(mm)
Rear of the cooling
channels (mm)
Weight (KG)
20KVA
830
455
1055
500
195
30KVA
500
210
40KVA
830
515
1135
500
285
20-30KVA UPS power supply Dimensions (Unit: mm) Figure 2-1.

11
Figure 2-1 20-30KVA UPS power supply Dimensions
2.4 Transport
Lifting Transport
【Preparation】Two at least 3 meters long, bearing at least 1.5 tons of the cables.
【Transportation】The UPS power supply cabinet should transport to the installation site before removing the
packages, Lifting the two suspension ropes from the bottom.
Figure 2-2 illustration of Lifting
Forklift Transport
The equipment could be transported by forklift too. Beware that the UPS is heavy and take care.
2.5 Method of fix
UPS passes its weight to the ground through four wheels. Use some auxiliary equipment to increase the contact
area if the floor can not withstand such pressure.
◆Note◆
The cooling air comes from the bottom of the UPS, so leave at least 10 cm space between the bottom of the UPS
and the floor.

12
2.6 Terminal Block connect
Terminal block of the Series UPS locates at the rear panel with a cover plate for protection. The indications of
wiring are listed in Figure 2-3.
MAINS
INPUT
BYPASS
INPUT
UPS
OUTPUT
BATTERY
INPUT
PEPE
PE RST N L N L N PE +-
Figure 2-3 Mode of Inlet and outlet
2.7 Ventilation
Cooling air for the UPS comes in from the bottom and comes out at the rear panel. So leave at least 500mm
between the wall and the rear panel for ventilation and wiring. Figure 2-4 is a reference installation of UPS and
battery cabinet.
500830500
BATTERY CABINET UPS CABINET
Figure 2-4 Relative installation of UPS and battery cabinet

13
ChapterⅢWiring
3.1 Cable diameter choosing
3.1.1 Current carrying capacity of cable
Table 3-1 shows the relation between sectional area and current for safe operation.
Current (A)
sectional area (mm2)
Sectional area (mm2)
1
1.5
2.5
4
6
10
16
25
35
50
70
25℃
rubber
21
27
35
45
58
85
110
145
180
230
285
plastic
19
24
32
42
55
75
105
138
170
215
265
35℃
rubber
20
25
33
42
54
80
103
136
168
215
267
plastic
18
22
30
39
51
70
96
129
159
201
248
3-1 Wire sectional area - current
3.1.2 Selection of power cables
Wires for mains input, bypass input, output, PE and battery need to be power cables. BVR or RV-type soft cables
of AC450V/750V, 70℃are recommended.
How to determine the current?
The first method is calculating, relative parameters are listed below:
Input power factor: 0.7
Total efficiency of: 0.8
Lowest input voltage: 176V
Output phase voltage: 220V
Lowest battery voltage: 160V
Input current = (Load (VA)/ 0.7/0.8) /176/3
Battery current = (Load (VA)/ 0.8) / 160
Output current = Load (VA) / 220
If you are not sure about the power of your load, refer table 3-2 cable diameter choosing.
Cable selection
Recommended current density range of power cable is 3 ~ 5A/mm2. The maximum voltage drop on the cable
should be less than 3V for avoiding overheat.
Sectional area of Neutral line should be 1.5~1.7 times as the one of phase line. While sectional area of PE
(protective earth) line should be 0.5~1.0 times as the one of phase line and be larger than 10mm2.
The UPS 10-20K current and cable sectional area are listed in Table 3-2.
Description
20KVA
30KVA
40KVA
Current
(A)
Cable
(mm2)
Current
(A)
Cable
(mm2)
Current
(A)
Cable
(mm2)
Battery
62.5
10
94
16
117
25
Bypass
90
16
136
35
182
50
Output
90
16
136
35
182
50
Input
64
10
85
16
95
16
Midline
Ground wire
Table 3-2 Recommended cable cross-sectional area and allowed current

14
◆Caution◆
Voltage of the battery breaker should meet the following requirements for reliable operation:
The UPS 20-40K ≥ 450VDC.
3.1.3 Signal wire
Signal wire should be shielded multi-conductor cable.
3.2 Cable connection
3.2.1 Power Cable
Mains input and bypass input shares the same input in our factory to support single AC input. Figure 3-1 indicates
that the customer does not have to connect bypass.
P E RST N L N L N P E +-
P E P E B A T T E R Y
IN P U T
U P S
O U T P U T
B Y P A S S
IN P U T
M A IN S
IN P U T
Figure 3-1 Single AC input (Default)
If customer wants to operate the UPS with dual AC input, remove the power cable between mains input and bypass
first in the terminal block, then connect mains input and bypass input independently. Figure 3-2 shows the correct
cable connecting.
-
+
PE
NLNLNT
S
R
PE
PE PE BATTERY
INPUT
UPS
OUTPUT
BYPASS
INPUT
MAINS
INPUT
Figure 3-2 Dual AC input

15
◆Caution◆
1. All switches should be in the "OFF" state before wiring.
2. Install the recovery plate of the block terminal for good ventilation.
3. PE should be connected because of big leakage current for safety. The resistance between cabinet and Earth
should be less than 1Ω.
3.2.2 Signal Cable
Communication interfaces locate at the top rear panel, including RS232, SNMP, RS485 and dry contact.
1098
7
6
5
4321
DRY CONTACTOR
NETWORK ADAPTER RS485 PORT
RS232 PORT
1234
5
6
7
89
1 2 3 4
43211 2 3 4 5678 9 10
Figure 3-3 Schematic diagram of the interface
Note: RS232 and SNMP can not be used at the same time.
RS232 connection
RS232 communication line is included in the attachment. Connect it between UPS and supervision terminal.
The definition of each pin is shown in Figure 3-4.
Figure 3-4 RS232 ports
Pin2: UPS receiving Pin 3: UPS sending Pin 5: GND
Other pin: Do not connect.
SNMP card connection
Please refer to SNMP guideline for help.
RS485 connection
Definition of RS485 interface is shown in figure 3-5.

16
R S 4 8 5 +
R S 4 8 5 -
G N D
1
2
3
4
Figure 3-5 RS485 ports
Pin 1: Positive bus Pin 2: Negative bus Pin 4: Shielded ground Pin3: Do not connect
Dry Contact Interface
Definition of dry contact interface is shown in figure.
A L A R M
R E M O T E S H U T D O W N
1
2
3
4
5
6
8
1 0
7
9
B Y P A S S O N
U P S O N
G N D
G N D
U P S F A U L T

17
Pin Definition:
Pin
Specifications
Input and output
1
UPS FAULT
Output
2
UPS ALARM
Output
3
GND
Input
4
REMOTE SHUTDOWN
Input
5
COMMON
Output
6
BYPASS ON
Output
7
LOW BATTERY
Output
8
UPS ON
Output
9
MAINS INPUT ABNORMAL
Output
10
REMOTE ON
Input
◆Note ◆
1. Pin4 and Pin10 are used for remote control. When Pin4 or Pin10 receives a high pulse of 3-10s, UPS will be
shutdown or turned on (Signal less than 3s or longer than 10s is invalid).
2. When UPS is in line mode, function of remote shutdown is not available.
Function Description:
Phenomenon
Description
Reason
PIN1、PIN5 shorted
UPS FAULT
UPS internal fault
PIN2、PIN5 shorted
UPS ALARM
1.Battery mode
2.Low battery
3.UPS internal fault or alarm
PIN3
GND OF INPUT
PIN4
REMOTE SHUTDOWN
External input signal, high active, remote shutdown
PIN5
COMMON OF OUTPUT
PIN6、PIN5 shorted
BYPASS ON
UPS in bypass mode
PIN7、PIN5 shorted
LOW BATTERY
Battery voltage Low
PIN8、PIN5 shorted
UPS ON
UPS Works in the line mode or battery mode(inverter works)
PIN9、PIN5 shorted
MAINS INPUT FAULT
Mains AC abnormal
PIN10
REMOTE ON
External input signal, high active, turn on UPS remotely.
Application demonstration
1
2
3
4
5
6
8
1 0
7
9
A L A R M
R E M O T E S H U T D O W N
B Y P A S S O N
U P S O N
R E M O T E S T A R T
U P S F A U L T
I N P U T M A I N S F A U L T
L O W B A T T E R Y
1 2 V
C O M M O N
G N D
A 6-24VDC source is connected between Pin 5 and Pin3. Keys of remote start and remote shutdown are used for
remote control. And the lights are used to indicate the status of UPS for remote supervision.