Page 1
SK120,SK200,SK350 Series
Pure Sine Wave Inverter
User’s Manual
Page 2
1.
Important Safety Information.………………………………………………
2
1-1
General Safety Precautions……………………………………………
2
1-2
Precautions When Working with Batteries……….…………………..
2
2.
Features………………………………………………………………………...
3
2-1
Electrical Performance…………………………………………………
4
2-2
Mechanical Drawing of Socket Type(Power Claw PP75)… …..….
7
2-3
Mechanical Drawing of Strip Wire Type……………….…………….
8
3.
Instructions………………………………………………….…………………
9
3-1
Front Panel Operation..………………………………………………...
9
3-2
Rear Panel Operation..…………………………………………………
11
3-3
Protections Features……..…………………………………………….
13
3-4
Installation.………………………………………………….…………...
13
3-5
Making DC Wiring Connections……...………………………………..
14
3-6
AC Safety Grounding…………………………………………………...
15
3-7
Inverter Operation………………………………………………………
16
4.
Troubleshooting guide………………………………………………………
17
5.
Maintenance……………………………………………………………………
18
6.
Warranty………………………………………………………………………..
18
Copyright ：This manual is the copyright of COTEK Electronic lnd. Co., Ltd. Be not allowed to reproduc or copy
without permission of the owner.
Table of contents
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Page 3
2
WARNING!
Before installing and using the Inverter, you need to read
the following safety information carefully.
1. Important Safety Information
1-1. General Safety Precautions
1-1-1. Do not expose the Inverter to rain, snow, spray, bilge or dust.
To reduce risk of hazard, do not cover or obstruct the ventilation
openings. Do not install the Inverter in a zero-clearance compartment.
Over heating may result.
1-1-2. To avoid a risk of fire and electronic shock. Make sure that existing
wiring is in good electrical condition; and that wire size is not
undersized.
Do not operate the Inverter with damaged or substandard Wiring.
1-1-3. This equipment contains components which can produce arcs or
sparks. To prevent fire or explosion do not install in compartments
containing batteries or Flammable materials or in locations which
require ignition protected equipment. This includes any space
containing gasoline-powered machinery, fuel tanks, or joints, fittings,
or other connection between components of the fuel system.
1-2. Precautions When Working with Batteries
1-2-1. If battery acid contacts skin or clothing, wash immediately with soap
and water. If acid enters eye, immediately flood eye with running
cold water for at least 20 minutes and get medical attention
immediately.
1-2-2. Never smoke or allow a spark or flame in vicinity of battery or engine.
1-2-3. Do not drop a metal tool on the battery. The resulting spark or
short-circuit on the battery of other electrical part may cause an
explosion.
1-2-4. Remove personal metal items such as rings, bracelets, necklaces,
and watches when working with a lead-acid battery,
A lead-acid battery produces a short-circuit current high enough to
weld a ring or the like to metal, causing a severe burn
Page 4
2. Features
Pure sine wave output (THD < 3%)
Output frequency：50 / 60Hz switch selections
Input & output completely isolated design
High efficiency 84~94%
Capable of driving inductive & capacitive loads at the start moment.
A LED Indicator with twin color displays all operation status.
Loading and temperature controlled cooling fan.
Built in advanced microprocessor to make friendly interface with user.
Protection：Input low voltage Overload Short circuit Low battery alarm Input over
voltage Over temperature
3
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4
Specification
Model No.
Item
SK120-112
SK120-124
SK120-148
SK120-212
SK120-224
SK120-248
Continuous Output Power
120W
Maximum Output Power
132W
Surge Rating (Max)
240W
Input voltage
12Vdc
24Vdc
48Vdc
12Vdc
24Vdc
48Vdc
Output Voltage
100 / 110 / 120Vac ± 5%
220 / 230 / 240Vac ± 3%
Frequency
(Switch Selections)
50 / 60Hz +/- 0.05%
Output Waveform
Pure Sine Wave ( THD < 3% )
Efficiency (full load) Max
*1
89%
91%
93%
92%
93%
94%
Input Voltage Regulation
10.5-15
VDC
21.0-30
VDC
42-60
VDC
10.5-15
VDC
21.0-30
VDC
42-60
VDC
Failure Indicator
Red LED
Protection
Overload (Shut down),
Short Circuit (Shut down),
Reverse Polarity (Fuse),
Over / Under Input Voltage (Auto recovery),
Over Temperature (Auto recovery).
Remote Control
Yes (ON / OFF mode controlled by hard wire) See 3-2
Safety
Meet UL458
EN60950-1
EMC
FCC Class A
EN55022:1997
EN61000-3-2:1998
EN61000-3-3:1995
EN55024:2001
e-mark
e13 023495
Operating Temperature Range
0 - 40 ℃
Storage Temperature Range
-30℃ to 70℃
Cooling
convection cooling
Dimensions
185(L)x147(W)x60(H)mm / 7.3(L)x5.8(W)x2.36(H) Inch
Weight
1kg
2-1. Electrical Performance
Note: The specifications are subject to change without notice.
*1 : This test condition is normal DC input (13.5V) and temperature 25℃.
Page 6
Specification
Model No.
Item
SK200-112
SK200-124
SK200-148
SK200-212
SK200-224
SK200-248
Continuous Output Power
200W
Maximum Output Power
220W
Surge Rating (Max)
400W
Input voltage
12VDC
24VDC
48VDC
12VDC
24VDC
48VDC
Output Voltage
100 / 110 / 120Vac ± 5%
220 / 230 / 240Vac ± 3%
Frequency
(Switch Selections)
50 / 60Hz ± 0.05% selectable by DIP switch
Output Waveform
Pure Sine Wave ( THD < 3% )
Efficiency (full load) Max *1
89%
91%
92%
91%
93%
94%
Input Voltage Regulation
10.5-15
VDC
21.0-30
VDC
42-60
VDC
10.5-15
VDC
21.0-30
VDC
42-60
VDC
Failure Indicator
Red LED
Protection
Overload (Alarm then shut down)
Short Circuit (Shut down)
Reverse Polarity (By fuse)
Over / Under Input Voltage (Alarm and shut down then auto recover)
Over Temperature (Alarm and shut down then auto recover)
Remote Control
Yes (ON / OFF mode controlled by hard wire) Refer to 3-2
Safety Standards
----
Certified EN60950-1
EMI Conduction & Radiation
Certified FCC class B
Certified EN55022;
EN 61000-3-2, -3-3
EMS Immunity
----
Certified EN55024;
IEC 61000-4-2, 3, 4, 5, 6, 8, 11
Operating Temperature Range
0~40 ℃
Storage Temp. & Humidity
-30℃~70℃, 10~95% RH
Cooling
FAN (Controlled by load and temperature)
Dimensions (WxHxL)
147.0x61.3x177.5 mm / 5.787x2.413x6.988 inch
Weight
1.74kg
Note: The specifications are subject to change without notice.
*1 : This test condition is normal DC input (13.5V) and temperature 25℃.
5
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6
Specification
Model No.
Item
SK350-112
SK350-124
SK350-148
SK350-212
SK350-224
SK350-248
Continuous Output Power
350W
Maximum Output Power
385W
Surge Rating (Max)
700W
Input voltage
12VDC
24VDC
48VDC
12VDC
24VDC
48VDC
Output Voltage
100 / 110 / 120VAC ± 5%
220 / 230 / 240VAC ± 3%
Frequency
(Switch Selections)
50 / 60Hz ± 0.05% selectable by DIP switch
Output Waveform
Pure Sine Wave ( THD < 3% )
Efficiency (full load) Max *1
89%
91%
92%
91%
93%
94%
Input Voltage Regulation
10.5-15
VDC
21.0-30
VDC
42-60
VDC
10.5-15
VDC
21.0-30
VDC
42-60
VDC
Failure Indicator
Red LED
Protection
Overload (Alarm then shut down)
Short Circuit (Shut down)
Reverse Polarity (By fuse)
Over / Under Input Voltage (Alarm and shut down then auto recover)
Over Temperature (Alarm and shut down then auto recover)
Remote Control
Yes (ON / OFF mode controlled by hard wire) Refer to 3-2
Safety Standards
Certified UL 458
(UL only for “GFCI” receptacles)
Certified EN 60950-1
EMI Conduction & Radiation
Certified FCC class A
Certified EN 55022;
EN 61000-3-2, -3-3
EMS Immunity
----
Certified 55024;
IEC 61000-4-2, 3, 4, 5, 6, 8, 11
Operating Temperature Range
0~40 ℃
Storage Temp. & Humidity
-30℃~70℃, 10~95% RH
Cooling
FAN (Controlled by load and temperature)
Dimensions (WxHxL)
147.0x61.3x177.5 mm / 5.787x2.413x6.988 inch
Weight
1.84kg
Note: The specifications are subject to change without notice.
*1 : This test condition is normal DC input (13.5V) and temperature 25℃.
Page 8
Unit: mm [inch]
2-2. Mechanical Drawing of Socket (Power Claw PP75)
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Page 9
8
Unit: mm [inch]
2-3. Mechanical Drawing of Strip Wire Type
Page 10
POWER
STATUS
50Hz
FREQ.
60Hz
AC OUTPUT
PURE SINE WAVE INVERTER
PURE SINE
WAVE INVERTER
AC OUTPUT
60Hz
50Hz
FREQ.
POWER
STATUS
Frequency
Dip Switch
50 HZ
ON
60 HZ
OFF
3. Instructions
This power inverter series is a the member of the most advanced line of mobile
AC power systems available.
To get the most out of the power inverter, it must be installed and used properly.
Please read the instructions in this manual before installation and operation this
model.
3-1. Front Panel Operation：
3-1-1. Front view：
3-1-2. AC Frequency：Selected by Dip Switch
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Green LED
LED Signal
Status
Solid
Power OK
Red LED
LED Signal
Status
Blink (Fast)
OVP
Blink (Slow)
UVP
Blink (Intermittently)
OTP
Solid
OLP
North America (GFCI)
NEMA 5-15R
Continental Europe
Australia / New Zealand
United Kingdom
Universal
IEC
PP75
CIGARET STRIPPED WIRE
3-1-3. Status：Display Power & Fault Status
3-1-4. AC Output (available Sockets)：
3-1-5. DC Input (available type)：
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REMOTE PORT
GND
ENB
ENB
DC INPUT
POWER
REMO.
OFF
ON
NEG (-)
CHASSIS
GROUND
POS(+)
REMOTE PORT
OFF
ON
POWER
GND
ENB
ENB
DC INPUT
REMO.
CHASSIS
GROUND
MODE Ⅱ
MODE Ⅰ
3-2. Rear Panel Operation：
3-2-1. ON / OFF / REMOTE Main Switch.
3-2-1-1. Before installing the inverter, make sure the main switch must
be “OFF”.
3-2-1-2. Before using the remote unit, make sure the main switch must
be “ REMOTE”.
3-2-1-3. Ensure the remote control contact is off.
3-2-1-4. Remote Port：Place 0.75mm2 and Screw type cable between
the remote port and the panel.
3-2-1-5. Remote port ON/OFF inverter setup status
VCEO > VBAT
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Model
DC Input Voltage
Minimum
Maximum
12 V
10.5
15.0
24 V
21.0
30.0
48 V
42.0
60.0
MODE Ⅲ
MODE Ⅳ
WARNING!
Operation of the inverter without a proper ground
connection may result in an electrical safety hazard.
NOTE: Only one of control mode can be presented. When operating.
3-2-2. DC Input Terminals：
Connect to 12V / 24V / 48V battery or the other power sources.
【＋】is positive,【－】is negative. Reverse polarity connection
will blow internal fuse and may damage inverter permanently.
3-2-3. Chassis Ground: using # 8 AWG wire to connect vehicle chassis.
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Model
DC Input (VDC)
Over Temperature Protection
Over Voltage
Under
Voltage
Alarm
Under
Voltage
INTERIOR
Shutdown
Restart
Shutdown
Restart
Shut-down
Restart
12 V
16V
13V
11.0V
<10.5V
12.5
55℃
45℃
24 V
32V
26V
22.0V
<21.0V
25.0
48V
62V
52V
44.0V
<42.0V
50.0
3-3. Protections Features:
Note: The specifications are subject to change without notice.
3-4. Installation：
Where to install. The power inverter should be installed in a location that
Meets the following requirements：
3-4-1. Dry – Do not allow water to drip or splash on the inverter.
3-4-2. Cool – Ambient air temperature should be between 0℃ and 40℃, the
cooler the better.
3-4-3. Safe – Do not install in a battery compartment or other areas where
flammable fumes may exist, such as fuel storage areas or engine
compartments.
3-4-4. Ventilated – Allow at least one inch of clearance around the inverter
for air flow. Ensure the ventilation openings on the rear and front
of the unit are not obstructed.
3-4-5. Dust – Do not install the Inverter in a dusty environments
where are dust, wood particles or other filings/shavings are present.
These dust can be pulled into the unit when the cooling fan is operating.
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WARNING!
The installation of a fuse must be on positive cable.
Failure to place a fuse on “+” cables running between
the inverter and battery may cause damage to the
inverter and will void warranty.
WARNING!
Shock Hazard. Before proceeding further, carefully
check that the Inverter is NOT connected to any
batteries, and that all wiring is disconnected from any
electrical sources. Do not connect the output terminals
of the Inverter to an incoming AC source.
3-4-6. Close to batteries – Avoid excessive cable lengths but do not install
the Inverter in the same compartment as batteries.
Use the recommended wire lengths and sizes (see section 3-5).
Also do not mount the Inverter where it will be exposed to the
gases produced by the battery.
These gases are very corrosive and prolonged exposure also will
damage the Inverter.
3-5. Making DC Wiring Connections：
Follow this procedure to connect the battery cables to the DC input terminals
of the Inverter. Your cables should be as short as possible (Ideally,
less than 6 feet / 1.8 meters ) enough to handle the required current in
accordance with the electrical codes or regulations application. Cables are
not an adequate gauge (too narrow) or too long will decrease the inverter
performances such as poor surge capability and low input voltage warnings
frequently and shutdowns. UVP warning presents due to DC voltage drop
across the cables from the inverter to the batteries.
The longer or narrower the cables, the greater the voltage drop.
Increasing your DC cable size will help improve the situation.
Following cable recommendations for the best performance of inverter.
(Apply both 120V and 230V versions )
Page 16
WARNING!
Risk of electronic shock. Use only Pass and Seymour, type
2095-W or 7899-W, ground – fault circuit-interrupter
receptacles. Others may fail in operating the inverter when
connecting to the inverter’s equipment.
3-6. AC Safety Grounding：
The AC output ground wire should go to the grounding point for your loads
( for example, a distribution panel ground bus ).
3-6-1. Neutral Grounding (GFCI’S)：
3-6-1-1. 120V models：The neutral conductor of the AC output circuit
of the Inverter is automatically connected to the safety
ground during inverter operation. In accordance with the
National Electrical Code requirements that separately derived
AC sources (such as inverter and generators) have their
neutral conductors tied to ground in the same way that the
neutral conductor from the utility is tied to ground at the AC
breaker panel. For models configured with a transfer relay,
while AC utility power is presenting and the Inverter is in
bypass mode, this connection (neutral of the Inverter’s AC
output to input safety ground) is not present so that the utility
neutral is only connected to ground at your breaker panel,
as required.
3-6-1-2. 230V models：There is no connection made inverter interior
between either the line or neutral conductor to the safety
ground.
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Ground Fault Circuit Interrupters (GFCI)：
Installations in Recreational Vehicles (for North American approvals) will
require GFCI protection of all branch circuit connected to the AC output of
the hardwire terminal equipped Inverter. In addition, electrical codes
require GFCI protection of certain receptacles in residential installations.
While the pure sine wave output of the Inverter is equivalent to the
waveform provided by utilities, compliance with UL standards requires us to
test and recommend specific GFCI.
Cotek has tested the following GFCI – protected 20A receptacles and found
that they functioned properly when connected to the output of the Inverter.
3-7. Inverter Operation：
To operate the power inverter, turn the main switch ON. The power inverter
is now ready to deliver AC power to your loads. If there is several loads use,
turn them on separately after the inverter has been “ON” in order to prevent
the OVP present caused by the surge power.
3-7-1. Set the power switch to the “ON” position and the buzzer will send
out “Beep” sounds at the moment the inverter will do self-diagnosis,
then the Power Status LED indicators will also appear various colors.
Finally the buzzer will sound another “Beep” and the Power Status LED
indicators will turn to “Green” color, the inverter starts working
successfully.
3-7-2. Set the power switch to the OFF position, the inverter stops and all
the lights that are On, go Off.
3-7-3. Set power inverter switch to the ON position and turn the test load
On. The inverter should supply power to the load. If you plan to
accurately measure the true output r.m.s. voltage of inverter, a meter
such as FLUKE 45 BECKMAN 4410 or TRIPLETT 4200 must be
used.
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Problems and Symptoms
Possible Cause
Solutions
“No AC Power Output”
STATUS illuminates the red LED
a. Blinking fast
Over input voltage.
( OVP )
Check input voltage.
Reduce input voltage.
b. Blinking slow.
Low input voltage.
( UVP )
Recharge battery.
Check connections
and cable.
c. Blinking Intermittently.
Thermal shutdown.
( OTP )
Improve ventilation.
Make sure ventilation
openings in inverter
are not obstructed.
Reduce ambient
temperature.
d. Solid ON.
Short circuit or Wiring
error.
Overload.(OLP)
Check AC wiring for
short circuit.
Reduce load.
WARNING!
Do not open or disassemble the Inverter.
Attempting to service the unit yourself may result in a
risk of electrical shock or fire.
4. Troubleshooting guide：
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5. Maintenance：
Very little maintenance is required to keep your inverter operating properly.
You should clean the exterior of the unit periodically with a damp cloth to
prevent accumulation of dust and dirt.
At the same time, tighten the screws on the DC input terminals.
6. Warranty：
We warrant this product against defects in materials and workmanship for a
period of 24 months from the date of purchase and will repair or replace any
defective Power Inverter when directly returned, postage paid, to us.
This warranty will be considered void if the unit has suffered any obvious
physical damage or alteration either internally or externally and does not
cover damage arising from improper use such as plugging.
The unit into an unsuitable power sources attempts to operate products with
excessive power consumption requirements, or use in unsuitable environments.
This is the only warranty that the company makes.
No other warranties express or imply including warranties of merchantability
and fitness for a particular purpose.
Repair and replacement are your sole remedies and the company shall not be
liable for damages, whether direct, incidental, special or consequential, even
though caused by negligence or other fault.
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No. 33, Rong Hsin Rd., Pa Teh City, Tao Yuan County, Taiwan
Phone：886-3-3661581 FAX：886-3-3676029
E-mail：sales@cotek.com.tw http：// www.cotek.com.tw
2011/05_A0
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