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Static Stabilizer
Static Stabilizer
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Salient Features of Industrial Battery ChargerIn general the system confirms to IEC 146 and IS - 4540 standardsSoft StartBattery path current limitingAutomatic float cum boost change overBuilt in digitally controlled automatic regulation circuitBuilt in Auto Phase Reversal OperationsSmoothing filter circuit to limit AC ripple.Charger overload protectionAssisted with advanced battery monitoring (ABM)Day/Time selector switches for automatic charge/discharge cycleInsulation class for magnetics as per IS standards7 tank processed powder coated painting shadesPowder coated paints as per IS/RAl standardsControlled based advanced annunciation.ProtectionOverload ProtectionBack-up protection by MCCB's providedDCU/V and O/V protectionShort circuit protectionBattery input fusesCubical lamp, voltmeters, control ckt, condenser protection by HRC fusesSCR, diode protection by semiconductor fusesVoltage Transient Protection by RC surge suppression networksBattery Reverse Current protection by charger blocked diodesEarth leakage protection by relay
Battery Charger
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Salient FeaturesNo Wave form distortion.Low internal impedance.High Speed correction rate.Especially numerical Designed Voltage Sensing circuit.Output Independent of nature of load, Value of load Q power Factors.Under and over voltage cut.Alphabetical LCD display for displaying parameters & messages.Load on & Mains on indication.Inbuilt Phase sequence detectorAlarm for fault occurrences.Protection against Over Voltage, Under Voltage, Overload Condition.Enhanced voltage Correction rate Controlled by micro controller.Settable required voltage within range of 380V-420V factory setting.Equipped with advance data logger for storage of fault history.
Numerical Servo Stabilizer
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Salient FeaturesMaintenances Free(no moving part)Very Fast Correction Speed.High Efficiency & 87%Zero Voltage Potential between Output, neutral and ground.Protected Against overload/Short circuitARMO CVTs are based on static, Magnetic (Ferroresonant) Principle. The input winding normally runs at very moderate levels of flux linkage. The output winding exhibits an intrinsic energy storage characteristic and this energy storageco-operates in conjunction with mains capacitors to produce self-generated AC flux fields which is indirectly excited from the input winding.This results in instantaneous voltage regulation,no transient,no spikes,sine wave output,noise less operation and high isolation between inputs and outputs.
Constant Voltage Transformers
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SALIENT FEATURESSpike Protection - MOV (Metal oxide Varistor) spike suppressor mounted on the AC input damps any spike over 200% of nominal input voltage with transit response time of 25ns.(A standard surge voltage measures 40 micro sec. in width.)Battery Low Protection and Auto Restart - The invertor supplies when line power is not available. To avoid battery Damage from over discharge, the generator shuts down automatically. The unit automatically restarts when the AC line is normal.Overload /Short Circuit Protection - The inbuilt electronic sensing circuitry gets activated when the generator is on backup & overload or short circuit occurs. The Overload condition is latched till the mains resumes or is manually reset. The internal fuse protects the wall outlet from damage due to overload or short circuit when generator is on mains.Charger Trip Protections - If no Battery or dead battery is connected, generators will check for voltage at battery connectors. If it is less than specified voltage (i.e. 4 volts x no. of batteries) Charger will be Tripped to avoid over loading and charger trip light on front panel will glow.Charger - Sophisticated Constant Voltage current limit (CVCL) charger to avoid over charging is also provided. This also assures full charging within expected time, even when mains supply is very low (170V).This assures full backup.Designed to provide benefits:Pure sine wave technologyOne year on site comprehensive warranty including battery.Compact and aesthetic design.Child and shock proof features offering complete safety.Acid resistant body and battery cabinet optional.
Sinewave Inverter
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These transformers steps down or steps up voltage viz. 230 to 110 V or 440 to 220 V etc. They are available in auto wound or double wound constructions and in rating up to 500 KVA (for Single phase and three phase)
Step Up-Step down
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IP ENCLOSURE PROTECTION FOR ISOLATION TRANSFOEMER:ARMO Isolation Transformer conforms to IP-30 protection as per IS:2147.DETAILS OF EARTHING FOR ISOLATION TRANSFORMERIt is recommended that every Isolation Transformer should have its own grounded earth, complete in itself.CONSTRUCTIONAL FEATURES OF ISOLATION TRANSFORMERSIsolation Transformer shall invariably be in one air cooled section.The enclosures are constructed from MS angles and CRCA MS sheets of best quality of reputed make only.The professional painting process comprises of7 Tank Pre-Treatment,Primer Coating andTwo Coats of final finish paint or POWDER COATING.
Isolation Transformer
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Low BurdenWide operating voltage rangeWide frequency setting range 39. 00 to 70. 00 HzIndependently adjustable tripping stages.Consistent accuracy (± .03 Hz)Unaffected by voltage fluctuationsInsensitive to harmonics & transientBuilt in timer(.1 to 99.9 Sec.)Built in event recorder for last three events.Under frequency & over frequency relay with 2 to 4 frequency stages.Adjustable under voltage blocking level.Field Adjustable relay rated frequencyOne operate time can give to each frequency stage.Protection stages can be separately blocked via internal blocking inputs.ApplicationARMO UFT frequency relays are used to monitor the frequency of an electrical system. Due to inadvertent splitting of inner connection in power system, isolated areas of the system may become deficient in the generation & frequency of the same may drop considerably giving rise to emergency conditions. In order to maintain control of system tinder this low frequency emergency some form of grated load shedding in needed.ARMO UFT relay is used to detect such condition & initiate load shedding to prevent complete system collapse.
Numerical under frequency relay
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Silent FeaturesLow burdenWide operating voltage rangeWide frequency setting range 39.00 to 70.00 HzIndependently adjustable tripping stages two of which have a rate of change of frequency function.Consistent accuracy = +-0.03 Hz at 50 HzUnaffected by voltage fluctuationsInsensitive to harmonics & TransientBuilt in self-test modeBuilt in timer .02 to .18 secARMO-UFTR Frequency relays are used-to monitor the frequency of an electrical System. Due to inadvertent splitting of inner connection in power system. Isolated areas of the system may become deficient in the generation and frequency of the same may drop considerably giving rise to emergency conditions. In order to maintain control of system under this low frequency emergency,some form of graded load shedding is needed. ARMO-UFTR relay is used to detect such conditions and initiate load shedding to prevent complete system collapse.Type UFTR-41 consists of two/three definite time fully independent frequency measuring stage and one df/dt stage.Type UFTR-51 consists of two/three definite time fully independent frequency measuring stage and one df/dt stage.Separate Auxiliary relays are provided which get energized after the respective time delays (In case of df/dt the tripping frequency gradient). Tripping indications and reset push button are provided on the front of the relay.The relays are suitable for any application in industrial plants and to generators where definite time under over frequency protection with df/dt stage is required.Internal timers are provided for each operating circuits and separate aux relays ensure maximum flexibility of application.Two terminals are provided for the voltage input to the frequency sensing circuit. The measurement of the frequency is digital for which only the zero-crossing of the system voltage and not its amplitude, are of consequence. The relay is independent of the voltage fluctuations with a wide range. However the system voltage sink below a predetermined value in which the accurate measurement can no longer be expected the under voltage blocking circuit blocks all the outputsTechnical DataAC voltage rating 110, 220VACAuxiliary supplyvoltage From PT 66 to 135 V External 35 to 135 of PTFrequency setting range 39.0 to 60.0 Hz in step of 1 HzUnder frequency setting (dfdt) 1 Hz Sec to 9.9 H:: Sec at 50 HzOperating voltage range 66 to 13535-to 135 VThe relay is blocked below & above this limitNo. of tripped stageUFTR -51UFTR-41UFTR-6 I 4. Two of which have dfdt outputOne of which have dfdt output4 No. of dfdt output Reference frequency 5 MHzAccuracy .03 Hz at 50 HzReset ratio 100% (Digital)Max reset time under &Overfrequency 50 msTripping delay for dfdt stage 5 cs to 9 cs unless stated set to 6 cs on deliveryEvaluation period for delivery dfdt stages 26 52 mSunless stated set to 26 mS OnBurdenAux Supply from PT 1.5VAAux supply from an external sourceAux DC /without tripping relays 1.5VA max at 150V 50Hz Contacts in relay 11 W for 4 stages Indicating signals 1 Pair of N/O reed contact 50VA max2.5 Ad. C. Test voltage Low voltage inhibit LEDLED tripping LED push button reset Reduced values are valid in case of repeat testing 2KV 50 Hz 1 min5KV 1.2/50 usec Casting Does not apply to the terminal connectedto a common Aux supply Guaranteed operation Ambient Flush mounting withrear connection110 mmx 205mmx 250mmW H D temperature -5 – 55`CSilent FeaturesLow burdenWide operating voltage rangeWide frequency setting range 39.00 to 70.00 HzIndependently adjustable tripping stages two of which have a rate of change of frequency function.Consistent accuracy = +-0.03 Hz at 50 HzUnaffected by voltage fluctuationsInsensitive to harmonics & TransientBuilt in self-test modeBuilt in timer .02 to .18 sec.
Frequency Trend Relay
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Static Stabilizer
View Details
Static Stabilizer
Salient Features of Industrial Battery ChargerIn general the system confirms to IEC 146 and IS - 4540 standardsSoft StartBattery path current limitingAutomatic float cum boost change overBuilt in digitally controlled automatic regulation circuitBuilt in Auto Phase Reversal OperationsSmoothing filter circuit to limit AC ripple.Charger overload protectionAssisted with advanced battery monitoring (ABM)Day/Time selector switches for automatic charge/discharge cycleInsulation class for magnetics as per IS standards7 tank processed powder coated painting shadesPowder coated paints as per IS/RAl standardsControlled based advanced annunciation.ProtectionOverload ProtectionBack-up protection by MCCB's providedDCU/V and O/V protectionShort circuit protectionBattery input fusesCubical lamp, voltmeters, control ckt, condenser protection by HRC fusesSCR, diode protection by semiconductor fusesVoltage Transient Protection by RC surge suppression networksBattery Reverse Current protection by charger blocked diodesEarth leakage protection by relay
View Details
Battery Charger
Salient FeaturesNo Wave form distortion.Low internal impedance.High Speed correction rate.Especially numerical Designed Voltage Sensing circuit.Output Independent of nature of load, Value of load Q power Factors.Under and over voltage cut.Alphabetical LCD display for displaying parameters & messages.Load on & Mains on indication.Inbuilt Phase sequence detectorAlarm for fault occurrences.Protection against Over Voltage, Under Voltage, Overload Condition.Enhanced voltage Correction rate Controlled by micro controller.Settable required voltage within range of 380V-420V factory setting.Equipped with advance data logger for storage of fault history.
View Details
Numerical Servo Stabiliz
Salient FeaturesMaintenances Free(no moving part)Very Fast Correction Speed.High Efficiency & 87%Zero Voltage Potential between Output, neutral and ground.Protected Against overload/Short circuitARMO CVTs are based on static, Magnetic (Ferroresonant) Principle. The input winding normally runs at very moderate levels of flux linkage. The output winding exhibits an intrinsic energy storage characteristic and this energy storageco-operates in conjunction with mains capacitors to produce self-generated AC flux fields which is indirectly excited from the input winding.This results in instantaneous voltage regulation,no transient,no spikes,sine wave output,noise less operation and high isolation between inputs and outputs.
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Constant Voltage Transfo
SALIENT FEATURESSpike Protection - MOV (Metal oxide Varistor) spike suppressor mounted on the AC input damps any spike over 200% of nominal input voltage with transit response time of 25ns.(A standard surge voltage measures 40 micro sec. in width.)Battery Low Protection and Auto Restart - The invertor supplies when line power is not available. To avoid battery Damage from over discharge, the generator shuts down automatically. The unit automatically restarts when the AC line is normal.Overload /Short Circuit Protection - The inbuilt electronic sensing circuitry gets activated when the generator is on backup & overload or short circuit occurs. The Overload condition is latched till the mains resumes or is manually reset. The internal fuse protects the wall outlet from damage due to overload or short circuit when generator is on mains.Charger Trip Protections - If no Battery or dead battery is connected, generators will check for voltage at battery connectors. If it is less than specified voltage (i.e. 4 volts x no. of batteries) Charger will be Tripped to avoid over loading and charger trip light on front panel will glow.Charger - Sophisticated Constant Voltage current limit (CVCL) charger to avoid over charging is also provided. This also assures full charging within expected time, even when mains supply is very low (170V).This assures full backup.Designed to provide benefits:Pure sine wave technologyOne year on site comprehensive warranty including battery.Compact and aesthetic design.Child and shock proof features offering complete safety.Acid resistant body and battery cabinet optional.
View Details
Sinewave Inverter
These transformers steps down or steps up voltage viz. 230 to 110 V or 440 to 220 V etc. They are available in auto wound or double wound constructions and in rating up to 500 KVA (for Single phase and three phase)
View Details
Step Up-Step down
IP ENCLOSURE PROTECTION FOR ISOLATION TRANSFOEMER:ARMO Isolation Transformer conforms to IP-30 protection as per IS:2147.DETAILS OF EARTHING FOR ISOLATION TRANSFORMERIt is recommended that every Isolation Transformer should have its own grounded earth, complete in itself.CONSTRUCTIONAL FEATURES OF ISOLATION TRANSFORMERSIsolation Transformer shall invariably be in one air cooled section.The enclosures are constructed from MS angles and CRCA MS sheets of best quality of reputed make only.The professional painting process comprises of7 Tank Pre-Treatment,Primer Coating andTwo Coats of final finish paint or POWDER COATING.
View Details
Isolation Transformer
Low BurdenWide operating voltage rangeWide frequency setting range 39. 00 to 70. 00 HzIndependently adjustable tripping stages.Consistent accuracy (± .03 Hz)Unaffected by voltage fluctuationsInsensitive to harmonics & transientBuilt in timer(.1 to 99.9 Sec.)Built in event recorder for last three events.Under frequency & over frequency relay with 2 to 4 frequency stages.Adjustable under voltage blocking level.Field Adjustable relay rated frequencyOne operate time can give to each frequency stage.Protection stages can be separately blocked via internal blocking inputs.ApplicationARMO UFT frequency relays are used to monitor the frequency of an electrical system. Due to inadvertent splitting of inner connection in power system, isolated areas of the system may become deficient in the generation & frequency of the same may drop considerably giving rise to emergency conditions. In order to maintain control of system tinder this low frequency emergency some form of grated load shedding in needed.ARMO UFT relay is used to detect such condition & initiate load shedding to prevent complete system collapse.
View Details
Numerical under frequenc
Silent FeaturesLow burdenWide operating voltage rangeWide frequency setting range 39.00 to 70.00 HzIndependently adjustable tripping stages two of which have a rate of change of frequency function.Consistent accuracy = +-0.03 Hz at 50 HzUnaffected by voltage fluctuationsInsensitive to harmonics & TransientBuilt in self-test modeBuilt in timer .02 to .18 secARMO-UFTR Frequency relays are used-to monitor the frequency of an electrical System. Due to inadvertent splitting of inner connection in power system. Isolated areas of the system may become deficient in the generation and frequency of the same may drop considerably giving rise to emergency conditions. In order to maintain control of system under this low frequency emergency,some form of graded load shedding is needed. ARMO-UFTR relay is used to detect such conditions and initiate load shedding to prevent complete system collapse.Type UFTR-41 consists of two/three definite time fully independent frequency measuring stage and one df/dt stage.Type UFTR-51 consists of two/three definite time fully independent frequency measuring stage and one df/dt stage.Separate Auxiliary relays are provided which get energized after the respective time delays (In case of df/dt the tripping frequency gradient). Tripping indications and reset push button are provided on the front of the relay.The relays are suitable for any application in industrial plants and to generators where definite time under over frequency protection with df/dt stage is required.Internal timers are provided for each operating circuits and separate aux relays ensure maximum flexibility of application.Two terminals are provided for the voltage input to the frequency sensing circuit. The measurement of the frequency is digital for which only the zero-crossing of the system voltage and not its amplitude, are of consequence. The relay is independent of the voltage fluctuations with a wide range. However the system voltage sink below a predetermined value in which the accurate measurement can no longer be expected the under voltage blocking circuit blocks all the outputsTechnical DataAC voltage rating 110, 220VACAuxiliary supplyvoltage From PT 66 to 135 V External 35 to 135 of PTFrequency setting range 39.0 to 60.0 Hz in step of 1 HzUnder frequency setting (dfdt) 1 Hz Sec to 9.9 H:: Sec at 50 HzOperating voltage range 66 to 13535-to 135 VThe relay is blocked below & above this limitNo. of tripped stageUFTR -51UFTR-41UFTR-6 I 4. Two of which have dfdt outputOne of which have dfdt output4 No. of dfdt output Reference frequency 5 MHzAccuracy .03 Hz at 50 HzReset ratio 100% (Digital)Max reset time under &Overfrequency 50 msTripping delay for dfdt stage 5 cs to 9 cs unless stated set to 6 cs on deliveryEvaluation period for delivery dfdt stages 26 52 mSunless stated set to 26 mS OnBurdenAux Supply from PT 1.5VAAux supply from an external sourceAux DC /without tripping relays 1.5VA max at 150V 50Hz Contacts in relay 11 W for 4 stages Indicating signals 1 Pair of N/O reed contact 50VA max2.5 Ad. C. Test voltage Low voltage inhibit LEDLED tripping LED push button reset Reduced values are valid in case of repeat testing 2KV 50 Hz 1 min5KV 1.2/50 usec Casting Does not apply to the terminal connectedto a common Aux supply Guaranteed operation Ambient Flush mounting withrear connection110 mmx 205mmx 250mmW H D temperature -5 – 55`CSilent FeaturesLow burdenWide operating voltage rangeWide frequency setting range 39.00 to 70.00 HzIndependently adjustable tripping stages two of which have a rate of change of frequency function.Consistent accuracy = +-0.03 Hz at 50 HzUnaffected by voltage fluctuationsInsensitive to harmonics & TransientBuilt in self-test modeBuilt in timer .02 to .18 sec.
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Frequency Trend Relay

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