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3 PHASE “FAST” TRANSFER CENTRAL INVERTER
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1 |
A solid state
rectifier/charger transforms the incoming mains into a regulated DC supply
charging the battery. |
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2 |
A battery is provided to maintain power to
the inverter. The battery is fitted with a suitably rated circuit
breaker/fuse to provide overload and short circuit protection and also
allows isolation from the UPS for maintenance purposes. |
|
3
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A continuously running pulse
width modulated transistorized static inverter transforms the battery energy
into a loss distortion, no-break, sine wave, AC voltage to supply the
critical load. |
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4
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A ferroresonant voltage
regulating transformer filters out surges, spikes, electrical noise,
lightning spikes, brownouts, and blackouts. |
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High Efficiency
On Line / No Break
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Be ready for virtually any
emergency with this Uninterruptible Power System. This pulse width modulated
inverter is continuously on, utilizing internal transistor redundancy which
allows up to 20% of the power switching transistors to fail and still
provide “full load output power”. The AC-IN to AC-OUT operating efficiency
is typically 90%, well above a typical on line UPS. The internal
construction of each cabinet consists of an AC to DC battery charger, DC to
AC inverter and energy storage transformer, and either Sealed Lead Calcium,
Refillable Lead Acid, or Refillable Nickel Cadmium Batteries. |
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3FTS
Series
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S
Battery Type
(S ~ Sealed)
|
120/208
Input AC
Line Voltage
|
120/208
Output AC
Voltage
|
90
Battery Run Time
|
-ISO
Options
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Mechanical Specifications
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| Model Number |
kVA
Rating
|
Max Util
Input
Current†
|
System
Efficiency
%
|
Heat
Loss
BTU's
|
Inverter Cabinet Dimension
|
Inverter
Weight
lbs.
|
|
(A)
Width
Inches
|
(B)
Height
Inches
|
(C)
Depth
Inches
|
| 3FTSS-16700-120/208-120/208-90 |
16.7
|
60
|
87
|
5700
|
42
|
70
|
19
|
900
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| 3FTSS-22500-120/208-120/208-90 |
22.5
|
75
|
89
|
7700
|
42
|
70
|
19
|
900
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| 3FTSS-30000-120/208-120/208-90 |
30
|
100
|
90
|
10200
|
42
|
70
|
19
|
1250
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| 3FTSS-37500-120/208-120/208-90 |
37.5
|
128
|
90
|
13000
|
42
|
70
|
19
|
1550
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| 3FTSS-50000-120/208-120/208-90 |
50
|
170
|
90
|
17000
|
42
|
70
|
19
|
1658
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†Amps Per Phase *3rd Cabinet Dimension is 42”W x 5”H x 19”D. |
**5th Cabinet Dimension is 42”W x 62”H x 19”D. |
If these units are to be used with a motor generator or a non-synchronous
transfer switch, please contact the factory with the exact specifications. |
Mechanical Specifications Continued
|
| Model Number |
Battery
VDC
|
Battery
Ampers
|
Battery
Run Time
Minutes
|
Battery Cabinet Dimension
|
No. of
Battery
Cabs.
|
Battery
Cabinet
NetWt.
lbs.
|
|
(D)
Width
Inches
|
(E)
Height
Inches
|
(F)
Depth
Inches
|
| 3FTSS-16700-120/208-120/208-90 |
120
|
180
|
90
|
42
|
62
|
19
|
2
|
1850
|
| 3FTSS-22500-120/208-120/208-90 |
120
|
250
|
90
|
42
|
70
|
19
|
3*
|
1850
|
| 3FTSS-30000-120/208-120/208-90 |
120
|
330
|
90
|
42
|
70
|
19
|
3
|
1850
|
| 3FTSS-37500-120/208-120/208-90 |
120
|
415
|
90
|
42
|
70
|
19
|
4
|
1850
|
| 3FTSS-50000-120/208-120/208-90 |
120
|
550
|
90
|
42
|
70
|
19
|
5**
|
1850
|
†Amps Per Phase *3rd Cabinet Dimension is 42”W x 5”H x 19”D. |
**5th Cabinet Dimension is 42”W x 62”H x 19”D. |
If these units are to be used with a motor generator or a
non-synchronous transfer switch, please contact the factory with the exact
specifications. |
Electrical Specifications
|
|
Input
|
Output
|
| Standard Input Voltage:
120/208 VAC 3-phase, 4-wire, +10%-15%. Other voltages available on request.
Input Power Walk In: 2 cycles, which limits the inrush current from the
utility to 125% maximum.
Input Frequency: 60Hz +/- 3%. (50Hz available upon request).
Synchronizing Slew Rate: 1 Hz per second nominal.
Input Lightning Protection: Up to 10,000V, 320 joules, meets IEEE 587.
I/O Noise Reduction: 80dB transverse mode, 120 dB common mode.
Input Current Distortion: 6% at full load nominal line.
Input Circuit Breaker: For complete system protection. |
Standard Output Voltage:
120/208 VAC, 3-phase, 4-wire. Other voltages available on request.
Output Regualtion (Static): Input variations +/- 1%, load current change
+/-2%, battery +/-2%.
Output Regulation (Dynamic): +/-3% for a +/-25% load step change. +/-6%
for a 50% load step change, recovery within 3 cycles.
Load Power Factor: .75 lag to .9 lead.
Output Frequency: Normally, synchronized to utility, +/-.05% during
emergency (50 Hz available upon request)
Output Distortion: 5% THD linear load..
Line to Line Voltage Unbalance: +/-4% for a 30% line to line load
unbalance.
Overload: Normal: 150% for 5 min. Emergency: 130% for 5 min. |
Electrical Specifications Continued
|
|
Battery
|
Physical
|
Types:
S ~ Sealed Lead Calcium
L ~ Refillable Lead Acid
N ~ Refillable NiCad
Standard Battery: Sealed lead calcium.
Charger: Automatic with internal diagnostic indicators. One LED type
indicator for float mode and another for high charge mode.
Recharge Time: 24 Hours to 87.5% charge.
Protection: Auto. low battery voltage disconnect.
Battery Discharge Alarm: Audible indicator of UPS operating in battery
mode.
Circuit Breaker: Also used as a battery isolator. |
Relative Humidity: 95% non-
condensing.
Operating Temperature: 32°F-104° F. Continuous operation at high or low
ambient temperatures may affect battery life and run time.
Metering: Digital indicating input voltage; output AC voltage; output
frequency: output AC current; DC battery voltage; DC battery current.
Controls: On/Off key operated switch. System test switch.
Mimic Panel:
 | Utility power on |
| UPS output on |
| Inverter on |
Manual Maintenance Bypass switch: Internal to UPS. Used to power load
direct from utility.
Battery Circuit Breaker: For overload and short circuit protection and
isolation from the UPS for maintenance.
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