Static UPS System
Introduction
Nexstep static change-over type UPS is a DSP based design with advanced features like mains short circuit protection and output short circuit protection along with cycle by cycle current limiting. The IGBT based static change over promises no delay during change over which works excellent for computer load. This design is ideal for solar application with its superior features like no-load shut down, automatic load restart and priority solar charging. It has fold-back current limiting for short circuit and heavy loads. At short circuit or heavy loads, current limiting action will take place instead of tripping which will lead to more reliability.
HIGHLIGHTS
- Full bridge configuration based on IGBT half bridge module
- Short circuit protection for mains and inverter both
- DSP based intelligent control
- IGBT based static change over – no relay change over
- LCD based display for user-friendly display of parameters and status
- Protection against overload
- Buzzer indication for battery low, overload, short circuit etc. System continues normally if the error is corrected.
- Four line LCD
- Priority solar charging
- No load shutdown and load restart for energy saving
- Cutoff and auto restart with permanent cut after 5 consecutive cut offs.
- SMPS type four stage charging with full charge cutoff and trickle charging.
- Self powered driver module with built-in isolated supply simplifies the design and reduces component count.
- 20KHz switching frequency resulting in silent operation. No audible noise.
- Pure sine wave output
- Ideal for mixed load.
- Inverter/UPS selection switch, micro switch or ordinary switch selectable.
- Protection against accidental output feedback disconnection.
- Indigenous design with proven technology
TECHNICAL SPECIFICATIONS
| Power Rating | 3000 VA – 10000 VA |
|---|---|
| Control Device | DIGITAL SIGNAL PROCESSING |
| Power Devices | IGBT / MOSFETS |
| Input Battery Voltage | 48 – 240 V DC |
| Output Voltage | 220 V +/-1% AC SETTABLE |
| Output Frequency | 50 Hz +/-1% |
| Output Wave Shape | SINOSOIDAL |
| Output T.H.D | < 2 % with resistive load |
| Mains Charging | < PWM |
| Main Charging Current | SETTABLE 15A MAX |
| Mains Charging Voltage | 140 – 270 V AC |
| Mains To Inverter & Inverter To Mains Change – Over | IGBT BASED STATIC SWITCH |
| Solar Charging Priority | YES |
| Battery Low Level | SETTABLE |
| Battery Full Charge Cut Off Level | SETTABLE |
| Overload Protection | FOLDBACK CURRENT LIMITING |
| Short Circuit Protection | TRIP AFTER 3 SEC |
| Over Load | 112 % FOR 10 SECS. |
| Overload Restart | AUTOMATIC ( 5 TIMES ) |
| Display | LCD 1, 2 or 4 lines settable |
| Alarms For Faculty Conditions | SHORT CIRCUIT, OVERLOAD, BATTERY LOW |
| Setup | THROUGH MENU-DRIVEN SETUP |
| Short. Circuit Restart | AUTO AFTER 15 SECS (5 TIMES) |
WHEN THE SYSTEM IS IN BYPASS MODE PARAMETERS DISPLAYED
- Battery Voltage
- Ups Standby On/Off
- Mains Voltage
- Charger On/Off
WHEN THE SYSTEM IS IN UPS MODE PARAMETERS DISPLAYED
- Battery Voltage
- Ups Output Voltage
- Load
- Solar Charing /Mains Charging
- Ups Mode
- Overload
- Short Circuit
- Overload Trip
- Short Circuit Trip
- Battery Low Voltage Trip