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USER’S MANUAL
2KSS6050/5060
2
nd
Edition
Frequency Converter
Visicomm Industries LLC
4525 Sheridan Rd.
Racine WI 53403
1. INTRODUCTION
The conversion of electrical power is an essential requirement for export testing or operation of equipment brought to the U.S. from abroad. The KSS series Frequency
Converter is designed to meet these needs as it supplies reliable, pure and stable power at an affordable price.
This Converter is designed with the following unique features l Double Conversion IGBT module, Single control board design, eliminates adjustment, and minimizes maintenance. l LCD display for unit status, user friendly design l Special overload capacity design, 150% overload for 30 sec. l Built-in isolation transformer to ensure total isolation between the input and output. l Special airflow control to avoid dust accumulation. Suitable for any rough operating environments. l Compact size, light weight.
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2.2
LED Explanation
(Refer to Image on previous page)
1. LINE: (Green LED) When this LED is lit, it indicates that the AC Line input voltage (either 120VAC or
220VAC, depending on connection) is connected, the breaker is set to the ‘on’ position, and voltage is being applied.
2. BYPASS: Not Applicable
3. INV.: (Green LED) After a 10 second (approximate) internal startup delay, this LED lights to indicates that the unit is converting the frequency to the specified parameters (60 to 50, 50 to 60, et al).
4. BATT.: Not applicable, unless optional battery backup has been ordered.
5. LOAD: (Amber LED) When the load % (accessible for view through the LCD screen) reaches 120% (and over), the unit beeps, and this LED lights to alert the operator of an overload condition.
6. FAULT: (Red LED) When this LED is lit, it indicates that there is an internal problem, please contact
Visicomm for further information, and instructions.
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Input Power Connections and Grounding
S ystem Ground Connection:
The Earth Ground should be provided by the utility. This is normally the “GREEN” wire provided by the utility which at some point is routed to a secure earth ground such as a water pipe. This wire should be connected to the screw post marked GND on the Converter (See photo for location).
Note that there are no internal electrical connections to this wire with the exception of a small high frequency bypass capacitor for RF suppression. Therefore, the function of the Earth
Ground is simply to maintain the case of the Converter at ground potential. Visicomm Industries
(LLC) does not recommend any other connection to the Earth Ground wire which may introduce significant amounts of current and thereby defeat the intended purpose of this wire which is the safety of the operating personnel. In particular, do not connect this wire to the system neutral wire at any point.
Output Connection:
The Power OUTPUT Connections are provided by three barrier terminal posts labeled N,
L1, and L2. These three terminals constitute the three terminals of an internal auto-transformer were L1 is the “center tap”. This is fed by the output winding of a switching transformer. Since the only other internal connections are a resonating capacitor, the cooling fans, and sensing circuits( to maintain an output sine wave ), these output terminals are electrically isolated from any other circuits including the system neutral.
The Converter is shipped with these OUTPUT connections electrically isolated. If a digital voltmeter is connected between any one of these OUTPUT terminals and the Earth Ground, a significant voltage reading will be obtained. This voltage is due to a small leakage current and is not considered a problem since only 1 or 2 ma is involved.
Output Isolation:
Many applications require an isolated output, primarily for safety reasons, when supplying power to a device under test especially if there will be other monitoring equipment connected to the device. Other applications can take advantage of the low leakage current of the Converter
(about 1 or 2 ma). This can be useful in systems where the individual leakage currents of the components might exceed the allowed leakage current of a ground fault interrupter.
Other applications require that the output have a connection to the utility NEUTRAL.
Normally this would be OUTPUT terminal N (The exception would be a two phase output where
L1 would be the connection to the system NEUTRAL). The Converter is supplied with a short jumper wire. If the system NEUTRAL is used to power the INPUT terminals and it is required that the OUTPUT be connected to NEUTRAL this jumper can be employed to make this connection.
If the INPUT is supplied by two phase AC or by two phases of a three phase system (in other words, if you have only two incoming power wires), this NEUTRAL would not be present and an external wire from the desired OUTPUT terminal to the system NEUTRAL would be required. See INPUT CONNECTION DIAGRAM on next page.
N
L1
L2
Basic diagram of output stage
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INPUT POWER CONNECTIONS
The frequency of the input power can be 50 or 60 Hz, and is not related to the output frequency
CAUTION:
The Input is Electrically Isolated from the output.
It is necessary to connect the input using one of the following four methods.
A. SINGLE PHASE 220V INPUT
This connection is usually used in 50Hz countries where a neutral is normally available.
B. SPLIT PHASE 220V INPUT
This connection is usually used in 60Hz countries where a 220V line is not normally available, and where the input amperage makes using 120V inconvenient.
C. SINGLE PHASE 120V INPUT
D. THREE PHASE 120/208 VAC USING LINE TO LINE INPUT
To be used if the 120V line to neutral connection is limited by the amperage available.
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OUTPUT POWER CONNECTIONS
The frequency of the output power can be 50 or 60 Hz, and is not related to the input frequency
CAUTION:
The output is "floating" and is electrically isolated from the input.
It is necessary to connect the output using one of the following three methods.
Note that these output voltages are widely adjustable using the voltage adjust rheostat.
A. SINGLE PHASE 120V OUTPUT
B. SINGLE PHASE 220V OUTPUT
C. SPLIT PHASE 220V OUTPUT
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Model
Capacity
4. SPECIFICATION
2KSS6050/5060
2KVA /1.4kW Input Current Requirement @ 220V, 10.3A –120V, 19.1A
Input
Voltage
Voltage Range
Frequency
Phase
120 or 220VAC
120V –15%/+20% or 220V –15%/+20%
50 Hz or 60 Hz ± 5%
Single
Output
Voltage
Voltage Regulation
Frequency
Frequency Regulation
Harmonic Distortion
Output Waveform
Output Current @ .7pf
Non-Linear Peak Current
120 or 220VAC ± 20%
± 1 %
50 Hz or 60 Hz (400Hz available)
± 0.0004% (xtal oscillator)
< 3% at 100% Linear Load
Pure Sinewave
120V-16.6A, 220V-9A
120V-24.6A, 220V-13.5A for 30 sec.
Power Factor
Efficiency
0.7
AC to AC > 85%
Protection
Overload Capacity
Short Circuit
EMI Filter
Over Temperature
110%continuous, 110-150% load 30 seconds, over 150% causes unit to shut down. Auto restart upon removal of overload
Unit will cut out and must be manually restarted
10-100KHz at 40dB, 100KHz-100MHz at 70dB
In verter auto cut-off when heat sink temp. over 80ºC.
Audible Alarm
Overload
Converter Fault
Sounds continuously
Sounds continuously
Indicators
LCD
LED
Converter status, INPUT & OUTPUT voltage- frequency, loading %
Line: Green LED
Fault: Red LED
In verter: Green LED
Overload: Yellow LED
Environment
Operation Temp.
Relative Humidity
Audible Noise
-10ºC to 50 ºC; 14ºF to 122ºF
20-90% non-condensing
<45dB
Physical
Dimensions
Net Weight
Depth
Width
Height
144lbs / 64.8kg
21.75in / 55.25cm
7in / 17. 78cm
19in / 48.26cm
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