tender for replacement of ccrs and allied works at salem airport; sitc of indoor type microprocessor based, air cooled constant current regulator of thyristor controlled electronic type suitable for use on 240 vac, +/- 10%, 50hz, input ac supply with below mentioned output power at 6.6 amps with 5 steps variation of current output (2.8a, 3.4a, 4.1a, 5.2a, 6.6a)suitable for local and remote control operation with 24/48 v dc control supply complete with output current indicated on multifunction digital display, over current, over voltage, open circuit, earth fault protection and earth leakage meter, positive back indication system, relay, contactor and suitable transient suppression / surge diverters on output etc. as required as per tender specification and of following rating. 4 kw mpccr at 6.6 amps, supply voltage 240 v ac with tapping at 2.5 kw with all necessary accessories etc. complete as required. , sitc of indoor type microprocessor based, air cooled constant current regulator of thyristor controlled electronic type suitable for use on 415 v ac, +/- 10%, 50 hz, input ac supply with below mentioned output power at 20 amps with 5 steps variation of current output (8.5a, 10.3a, 12.4a, 15.8a, 20a) suitable for local and remote control operation with 24/48 v dc control supply complete with output current indicated on multifunction digital display, over current, over voltage, open circuit, earth fault protection and earth leakage meter, positive back indication system, relay, contactor and suitable transient suppression / surge diverters on output etc. as required as per tender specification and of following rating. 30 kw mpccr at 20 amps, supply voltage 415 v ac with all necessary accessories etc. complete as required. , sitc of remote control desk with mimic display unit at control tower suitable for remote operation of glf/ constant current regulators system comprising of following glf / ccr, apron flood light etc., with nesscessary control wiring for interconnection, feedback indication etc. with terminal block including wiring, suitable relay/contactor etc. as required as per tender specifications for remote controlling of following systems. suitable main/aux. power control with 32 a tpn / spn mcb-01 nos and on/off sealed toggle switch, 5 position brillancy control switch, dc power pack for indicating leds, mimic diagram, control fuses, terminal blocks and selector switch, relaysfor following as per aai specifications. a) runway edge light circuit.... 2 nos b) papi circuits..........................2 nos c) approach circuits...................2 nos d) taxi circuits............................2 nos e) spare circuits for ccr ..........2 nos f) wind cone................................1 nos g) landing h.................................1 nos h) beacon......................................1 nos i) apron flood light....................10 nos j) spare fixed circuits ...................2 nos