SCS20

OPERATION

POWER CONTROL

Standby Rectifiers for multiple applications. The structure of the SCS-20 equipment can be divided into two sections: power and control.

Thanks to its versatility to suit customer needs the power supply is configurable for three-phase and single-phase power. The SCS 20 includes a trans-former with galvanic isolation to protect the recti-fier input and allowing adaptation to any input voltage. The SCS 20 is designed to operate based on the technology of pulse width modulation controlled in low frequency through a full wave bridge rectifier for three-phase and single-phase half controlled for. The output incorporates an LC filter to attenuate the ripple current voltage output and improved performance of the equip-ment.

The SCS20 performs analog and digital control through an advanced microprocessor card that monitors and controls the computer digitally limiting values of voltage and current analogica-lly. SCS20 has local and remote signaling by display of the parameters, states and alarms.

Tecnibat-Emisa Emisa rectifiers have a characteristic controlled output (curve IU - as per DIN 41773 standard). Its high stability keeps the output voltage within ±0,5%, with input voltage variations of ±10%, frequency variatons of ±5% and charging from 10 to 100%. Its main reliability features make SCS-20 an equipment for power supply in electrical substations. Highly adaptable to different applications and environments, with a broad range of standard features and upgradable if necessary to meet the most demanding requirements.Easy installation, operation and maintenance.Compatibility with different battery technologies, mainly Nickel-Cadmium and Lead batteries, open or VRLA, with special devices to enhance its performance and reliability.

Fig. 1: SCS20

Updated designFifty years of experience

Unbeatable features Robust and flexible technology

Designed for industrial environmentsPerformance and reliability

Standard configurationPower and control

TECHNICAL SPECIFICATIONSInput voltage range:*Output voltage:*Frequency rangeOutput current range*EfficiencyPFTHDOvercurrent protection*Overvoltage protection*

Ripple*IP*Color*Current LimitingCharging curveConfigurationLocal alarms

LED Signalling

Display Signalling

Communications

Internal protections

Standards compliance

Single phase/Three phase [120-480V ±10%] 12-220 Vdc45 to 66 Hz0-1250 A>83% full load>0,8 full load<30% Thermal-magnetic circuit breaker/FusePossibility of incorporate dischargers for over-voltage at input and output<5% 20-55RAL 7032Total current rectifier and charge current of the batterycurve IU- as per standard DIN 41773Single/Principal-Hot Stand-by/ParallelMains failureRectifier failureEarth fault +Earth fault –Low battery voltageLow operating voltageHigh battery voltageHigh operating voltageMinimum float voltage Mains failureRectifier failureEarth fault +Earth fault –Mains pauseBattery voltageOperating voltageRectifier currentBattery currentModbus via RS232, RS485Local via software EmitelAC and DC Overvoltage*OvertemperatureShort-circuitEN 61000-6-2, EN 61000-6-3

OvertemperatureInput protection activatedRectifier bridge input protection activatedRectifier bridge output protec-tion activatedBattery protection activatedOperating current protection

ChargeBoost chargeExceptional chargeBattery in discharge

Operating currentRectifier temperatureCharging modeAlarm description

SCS20

*Configuration adaptable to customers' specifications