Controllers

Field proven since 1982. Tens of thousand in use. Up to 32 stages with extension sequencer. Built in Auto/Manual Control. Available for LT & HT application. 4 Digit Power Factor Meter. Intelligent timer prevents reswitching of changed capacitors. Dead band control to prevent hunting. Up to 24 stages in standard version. One of the First & Oldest APFC Relay manufactured in India. High noise immunity. LED indication for all operation. Built in test facility. PF setting from 0.75 lag To 0.99 lead. Accurate and reliable. Power Factor is an important parameter needing control. The Syntron Automatic Power Factor Control Relay type 1107 is specifically designed to control the power factor of an installation accurately and reliably. Introduced first in 1982, the Relay has undergone countless refinements and improvement to make it the most sought after APFCR in India.The leaflet reflects all the changes, refinements and additions made in the line. The major additions are: The Relay with over 8 stages were earlier supplied with extension sequencer which had to be mounted separately. We now supply relays with up to 24 stages in one enclosure. The original 1107 had an analog power factor meter, some users demand a digital power factor meter thinking that it would be more accurate. Actually the PF meters normally provided are 2 ? digit type, the resolution of which is worse. Accuracy may be the same. We therefore designed in a four digit power factor meter the accuracy of which is the same as analog and resolution is ten times better than the two and a half digit versions. The meter provided on the 1107 is also far more stable to provide meaningful readings. Function:The APFCR controls the power factor of the installation by giving signals to switch on or off power factor correction capacitors. It should be noted that this is only a Relay constituting the so to say 'brain' of the system and it cannot switch the capacitors directly but need intermediate contractors of appropriate ratings.The APFCR has a built in power factor transducer which measures the power factor of the installation and converts it to a DC voltage of appropriate polarity. This is compared with a reference voltage which can be set by means of a knob calibrated in term of power factor. When the power factor falls below setting, the APFCR switches on the capacitors one by one in sequence, which can be either First In First Out (FIFO) or First in Last Out (FILO). In either case the capacitors of all stages must all be of same rating. The Relay switches them on in linear sequence. Facilities: Power Factor Meter : Four Digit Digital Meter. Please refer description above. PF Setting Dial : The required PF is to be set on this dial calibrated from 0.75 lag to .99 lead Dead Band Knob : This setting determines the range of phase angle over which the Relay will not respond. Dead Band is necessary to prevent overcorrection and hunting. Undercurrent Blocking : When the load is low the effect of the capacitors is more pronounced and may lead to hunting. Undercurrent Blocking shuts down the Relay when the load is too low, and switches off all the capacitors one by one in sequence. Auto/Manual Facility : The system may be operated manually from the Relay by this control. Special Timing Sequence : The APFCR has a built in logic timer which inhibits operation for a fixed delay of 65 seconds for LT Relays (and 310 seconds for HT application Relays) whenever the following changeover occur:" Changeover from Auto to Manual and vice versa." Changeover from capacitor off to capacitor on signal.This delay ensures that the capacitors are fully discharged before they are re switched in. This avoids transient and damage to capacitors. Indication : The APFCR has solid state indication lamps (LEDs) for every one of the function the operator should know about : Auto, Manual, Low PF, High PF, Timer, Amps OK, Test (to indicate that the Relay is in TEST Mode.) and for each capacitor switching stage. Specifications:Voltage : 400 - 415 - 433 - 440 volt (specify one) three phase three wire 50Hz 20 VA (110 volt models on request)Current : Through CT. Full scale 1 Amp or 5 Amps.Meter : Digital meter : range 0.000 lag to 0.000 lead, lag and lead indication by separate LEDs.PF Setting range : 0.75 lag to 0.99 lead.Dead Band Control : At minimum : 4 deg electrical; At maximum : 14 deg electricalCapacitor Switching : Standard models are for upto 16 stages and for upto 24 stages. Each switching stage is provided with one normally open potential free contact. Switching sequence can be FIFO or FILO as noted above, as per order.Contact Rating : Each switching contact is rated for maxima of 440 volts and 5 Amps AC resistive loads.Dimensions : Front Bezel : 365 mm W X 135 mm H Panel Cutout : 355 mm W X 125 mm H Depth Behind Panel : 285 mm including terminalsWeight : 6.0 Kg approx for 8 stage model, 7.5Kg approx for 16 stage model. > 24 stage model Controllers