MODEL 1725 DC-AC INVERTER ELECTRONICS CO., INC. P. O. Box 1329, Hillsborough, N. C. 27278, U.S.A. BULLETIN NO. 7011 1000-VA DC-TO-AC INVERTER 120-VAC, 60-Hz OUTPUT Model 1725-48-120-60-P FEATURES Compact and rugged, the 1000-VA Model 1725 dc-to-ac inverter is particularly suited for space-limited applications within the tele- • HEIGHT 1.75” (1 RACK SPACE) communications, data-processing and utility industries. Occupying only 1.75 inches (1U) of vertical rack space, this inverter provides a • 24, 48 OR 130 VDC INPUT regulated 120-Vac, frequency-stable 60-Hz quasi-sine-wave output. • ISOLATED, REGULATED It is available in 24, 48 and 130-Vdc input versions and is compatible FREQUENCY-STABLE OUTPUT with either 19-inch or 23-inch equipment racks. The conservatively rated Model 1725 can operate continuously at maximum rated power • APPROX. 90% EFFICIENT over a -10°C to +50°C ambient temperature range and is well suited for powering a variety of loads, from sensitive electronic equipment • RUGGED, CONSERVATIVE DESIGN to small motors and nonlinear loads normally considered diffi cult for inverters. • AVAILABLE WITH INTEGRAL The Model 1725 is available as a plain inverter or with built-in HIGH-SPEED TRANSFER automatic load switchover features to permit operation in UPS or SWITCH FOR UPS/STANDBY- standby-power modes. POWER APPLICATIONS Table 1 Nominal Input Input Current Input Current Model 1 2 Input Voltage Voltage Range No Load Full Load 3 Number (Vdc) (Vdc) (Adc) (Adc) 24 21-29 0.5 48 1725-24-120-60 48 42-58 0.3 24 1725-48-120-60 130 105-145 0.2 9 1725-130-120-60 1 Typical at no load and nominal input voltage 2 Typical at full load and nominal input voltage 3 See reverse side for complete model numbering information DESIGNERS AND MANUFACTURERS OF SOLID-STATE POWER CONVERSION EQUIPMENT Top View SPECIFICATIONS Input Voltage and Current The nominal input voltage, the input voltage range, the no-load input current and the full-load input current are shown in Table 1. Output Voltage 120 Vac nominal, single phase Frequency 60 Hz nominal. ±0.25 Hz maximum variation over the full range of load and input voltage changes. Temperature coeffi cient is ±0.02% maximum per °C. Volt-Ampere Rating 1000 VA Output Voltage Regulation Approx. ±5% Output Voltage Wave Shape Three-level stepped approximation to a Rear View sine wave with peak, average and rms Fig. 1 Overall dimensions. Inverter shown is U or L version. values approximating those of a sine wave. Temperature Range U VERSION: Adding the suffi x U to the there is a delay of approximately fi ve Operating: -10°C to +50°C basic model number designates the seconds, the load is then transferred back Storage: -40°C to +95°C inverter-preferred UPS confi guration. to commercial ac power and the inverter In this confi guration, the load power again operates in the standby mode. Protection is normally provided by the inverter. Other features such as transfer speed, Protection against overloads and However, if the inverter output is alarms, indicators, etc. are the same as in accidental short-circuit of the output is interrupted, an internal transfer switch the U version. provided electronically, and recovery is automatically transfers the load from the automatic upon removal of the abnormal inverter to commercial ac power. The Model Numbering Information load. transfer time between inverter and line is For ordering purposes the Model 1725 short (2 msec. typical) and such transfers should be identifi ed by an expanded Front-Panel Controls and Indicators are normally not detected by even highly model number consisting of four numbers A combination circuit breaker and ON/ sensitive loads. Upon restoration of followed by a letter suffi x. In sequence, OFF switch is provided for input power. inverter power, transfer back to inverter they designate: L and U versions include three LED status power automatically takes place within • basic 1000 VA inverter type (1725) indicators. a few seconds. This version includes • nominal input voltage (24, 48 or 130) auxiliary Form C contacts for remote • nominal output voltage (120) Mechanical Description indication of alarm conditions and three • output frequency (60) Figure 1 provides overall dimensions. front-panel LED status indicators. • confi guration (P, U or L version) Weight is approximately 13 lbs. Brackets For example, the correct part number for are provided for 19-inch or 23-inch rack L VERSION: Adding the suffi x L to the a 48-volt input, inverter-preferred UPS mounting. basic model number designates a unit confi guration is Model 1725-48-120-60-U which is identical to the “U” version Standard Confi gurations except that, in the L confi guration, the OTHER WILMORE PRODUCTS P VERSION: Adding the suffi x P to the load power is normally provided by For information about other Wilmore dc- basic model designates a plain inverter, the commercial ac line and the inverter to-ac inverters or for information about i.e. a unit with no internal inverter-to- operates in the standby mode. If other power-conditioning products such line or line-to-inverter transfer switching commercial ac power is interrupted, an as switching power supplies, dc-to-dc provisions. (“Line” refers to commercial ac internal transfer switch automatically converters, and uninterruptible power power.) This version does not have the transfers the load to the inverter. systems, please contact our sales three front-panel LED status indicators or Upon restoration of commercial ac power, department. alarm contacts. Information provided in this bulletin is subject to change without notice. WILMORE ELECTRONICS COMPANY, INC. P. O. Box 1329, Hillsborough, N. C. 27278 • Telephone (919) 732-9351 • FAX (919) 732-9359 www.wilmoreelectronics.com