Emco Electronics

EMCO s solid state Automatic Voltage Regulatory Relay type EE 301 E is designed for maximum operational simplicity. It regulates the secondary voltage of power transformers with onload tap changers. The bandwidth control allows the dead-band to be set in terms of upper LOWER VOLT and lower RAISE VOLTS voltage limits.

EMCO s solid state Automatic Voltage Regulatory Relay type EE 301-M is designed for maximum operational simplicity. It regulates the secondary voltage of power transformers with on-load tap changers. The bandwidth control allows the dead-band to be set in terms of upper LOWER VOLTS and lower RAISE VOLTS voltage limits around a particular nominal value with specified sensitivity.

EMCO s Automatic Voltage Regulating Relay Type EE 302 is a modular Microcontroller- based relay used for regulating the Secondary voltage of Power Transformers used with On Load Changer. The parameter settings are made through the front panel keyboard using the Adjust Keys. Auto/Manual mode and Display selection is also made from the Front Panel Keyboard. The programmed parameters are stored in Nonvolatile Memory.

EMCO s TAP POSITION INDICATOR T.P.I.Type EE 601 is used to indicate the tap position of the power transformer with On Load Tap-Changer OLTC.

The step resistance is connected between each tap position at the transformer end.
The minimum, maximum and wiper common connections are brought to the Remote Control Panel to the T.P.I.

The Voltage Controller Control Unit VCCU senses the output voltage of the Voltage Controller 230 V AC and controls it within the set limits. There are two independent Raise Lower Voltage settings. When the output voltage goes outside the set limits the output Raise Lower Pulse is given after the set delay is over. LED indication is provided to indicate the control action and a pair of NO contacts for “Raise Lower closes depending on whether the voltage has to be Raised or Lowered.

EMCO Echo Suppressor is used for Telephonic communication via Satellite to suppress undesired Echos during conversation. It meets all CCITT Specifications Rec. G 161 Revised It can be operated on Mains and Battery. A complete Half Echo Suppressor with isolated SEND RECEIVE INPUT OUTPUT ports is accommodated on a single plug in card with optional Tone Disable card. A total of 18 Echo Suppressor cards are housed in a 19 subrack with connectors for termination & monitoring. Fault indication and alarm annunciation is available with the power supply module. Major overseas communication service centres like Gateway Switching System, Overseas Communication Services at Bombay and New Delhi; IOCOM Submarine cable Project, Overseas Communication Services, Madras are using EMCO Echo suppressor.