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Current Transformers
As it is not possible to use line current directly for measurement and protective relays due to its high value & insulation problem. Our bar primary CTs, Cast Resin CTs current transformers and control transformers are used to : - Reduce the line current to a value (e.g 1 amp.) which is suitable for standards measuring instruments, relays etc.
- To isolate the measuring instruments, meters, relays etc. from direct line.
- To protect measuring instruments against short circuit current.
- Principal of operation:-Current transformer works on the principal of variable flux. In the ideal current transformer, the secondary current would be exactly equal to(multiplied by turns ratio) the primary current. But in practice, some of the primary amp-turns are used for magnetizing the core.This causes an error, which is termed as current (ratio)error and phase error.
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| | Low tension transformer (Cast Resin ) We manufacture Bar primary cast resin CTs (ring type) which are mechanically stronger,dust proof,compact design and easy to connect in existing switchgear.They are used in Control panels ,Switchboard and Generator panels (?Metering, protection and special protection ps class).Its window is suitable for round or rectangular primary conductor or bus bar?and sealing arrangement for secondary terminals.
SPECIFICATIONS:
Primary Current : 50 to 3000A Secondary Current : 5, 1, 5/rt3, 1/rt3A Accuracy Class : For Metering : 0.5 to 5 A For Protection : 5P, 10P accuracy limit factor 5,10,15,20 For PS Class : Knee point voltage (VK), secondary resistance ?????????????????????????? and magnetizing current is required. Burden : 1.25 to 30 VA Mounting : Threaded inserts for floor mounting.
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| Low tension transformer (Tape wound & cap insulated) We manufacture Tape Insulated Bar Primary CTs ( Ring & Rectangular Type) which are generally prefered because they are simple in construction, mechanically stronger, economical and easy to connect in existing switchgear. They are used in control panels and generator panels(Metering , protection and special protection ps class).they are available in round or rectangular window and suitable for a wide range of electrical test equipment.
SPECIFICATIONS :
Primary Current : 50A to 6000A Secondary Current : 5,1,5/rt3 and 1/rt3 A Accuracy Class : For Metering CTs : 0.5 to 5A For Protection CTs : 5P,10P accuracy limit factor 5,10,15,20 Burden : 1.25 VA to 60 VA Mounting : M.S. clamp if required.
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| | Wound Primary Current Transformers We manufacture wound primary CTs (Tape and Resin Cast) designed for large burdens and better accuracies (Metering, Protection and Special protection PS Class). Secondary terminal with threaded insert and primary with brass plated studs suitable for precision measuring test apparatus. Multiratio C.T. available in the portable wooden case to be used as laboratory standard.
Specifications:
Primary Current : 1 to 100A
Secondary Current : 5, 1, 5/rt3, 1/rt3A
Accuracy Class :
For Metering : 0.1 to 1 A For Protection : 5P, 10P accuracy limit factor 5,10,15,20 For PS Class : Knee point voltage (VK), secondary resistance and magnetizing current is required. Burden : 5 to 60 VA
Mounting : Threaded inserts for floor mounting.
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| Summation Current Transformers We?manufacture resin cast summation CTs which summates the current in a number of feeders in association with feeder current transformers.'When current flows in more than one feeder is required to be metered summation current transformer are used. These CTs are provided with more than one primary winding and one common secondary. The standard primary & secondary currents are 5 or 1 amp. Summation current transformers are generally manufacture-confirming to ISS 6949.
Specifications:
Primary Current :?5 to 1 A Secondary Current : 5 or 1 Accuracy Class : 0.2, 0.5,1 A Burden : 1.25 to 30 VA Mounting : Threaded inserts for floor mounting.
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| | Interposing Current Transformers We manufacture Interposing CTs (Resin Cast ) for matching of ratio with main C.Ts in different protection scheme.
SPECIFICATIONS :
Primary Current : 5 to 1A Mounting : Threaded inserts for floor mounting.
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| Core Balance or Zero Sequence Current Transformers We manufacture Core balance or Zero sequence (Tape or Resin Cast ) CTs. These are for sensitive earth leakage protection and earth fault protection. These are suitable for Bus bar of panels/ bus duct and cables etc.These are ring or rectangular type CTs & suitable for the measurement of the sum of three phase currents in a 3-ph cable. Under normal operating conditions this sum is zero. In the event of an earth-fault the sum of the current is equal to the zero sequence current. It is necessary to specify leakage current to be detected along with minimum setting of the relay and size of cable at the time of ordering CT.
Primary Current :
300 mA to 10 A | | | Request for Full Quote |
| | High Tension Currrent Transformers We also manufacture high tension current transformers ( Upto 11Kv ).
Resin Cast Ring or Rectangular Type.
Resin Cast Bar Primary with Embedded Bar.
Resin Cast Wound Primary (Termination on Stud/Bar).
SPECIFICATIONS :
Voltage : 3.3/6.6/11Kv PrimaryCurrent : 10A to 2000A Secondary Current : 1A, 5A Insulation Level : 30 KV Short Time Current : Upto 26.2 KA for 1 second Class Of Insulation : F Double Ratio - Triple Core Burden Class Of Accuracy
Core 1 (Metering) : 15 VA 0.5
Core 2 (Protection): 15 VA 5P , 10P Accuracy Limit Factor 5, 10,15,20
Core 3 (PS Class) : 15 VA PS ( Knee Point Voltage is required)
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| Cast Resin CTs (Rectangular Type) We manufacture Bar primary cast resin CTs (Rectangular type) which are mechanically stronger,dust proof and easy to connect in existing switchgear.They are used in Control panels ,Breaker panels and Switchboard ( Metering, Protection and Special protection PS class).Its window is suitable for aluminium and copper bus bar and sealing arrangement for secondary terminals.
SPECIFICATIONS :
Primary Current : 600 to 10,000A Secondary Current : 5, 1, 5/rt3, 1/rt3A Accuracy Class : For Metering : 0.5 to 1 A For Protection : 5P, 10P accuracy limit factor 5,10,15,20 For PS Class : Knee point voltage (VK), secondary resistance and magnetizing current is required. Burden : 5 to 60 VA Mounting : Threaded inserts for floor mounting.
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| | High Tension Potential Transformers We manufacture high tesnion potential transformers (up to 11KV), with dry type resin cast (single phase and three phase) for indoor applications.The primary and secondary winding of potential transformer is magnetically coupled by a core. PT is used to step down the system voltage (3.3,6.6,11 KV) measurable upto 110/rt3, 110 V. The class of accuracy of metering PT is 0.2,0.5,1.0 and of protection PT is 3P.
SPECIFICATION :
Primary Voltage : 3.3 - 6.6 – 11 KV/rt3 Secondary Voltage : 110/rt3 , 110 V Burden : Upto 200 VA Accuracy Class : 0.2 , 0.5 ,1.0 and 3P Over Voltage Factor : 1.2 continous and 1.5 for 30 sec.for effectively earth system and 1.9 for 8 hour for non effectively earthed system. Neutral : Connected to earth. Connection : Y/Y , Y/ Insulation Class : F Insulation Level : 30 KV
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| Control Transformers We manufacture control transformers that are designed with very low temperature rise and ensure excellent voltage regulation. These also ensure extreme overload capacity of high momentary in-rush current demand by the contractors, relays and solenoids. The output voltage drop under high momentary in-rush current is also very low, which ensures satisfactory operation of contactors, relays and solenoids.
SPECIFICATIONS :
Input Voltage : 380 V to 415 V Output Voltage : 110 V to 220 V Burden : 50 VA to 2500 VA Type : Air Cooled
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| | CT-PT Combined Units CT-PT Combined Unit (Upto 11kv) are also called metering units. These units can be offered as dry type or oil immersed. The metering unit consists of : - 02 nos. single phase CTs and 01 no. three phase PT.
- 03 nos. single phase CTs and 01 no. three phase PT.
- 02 nos. or 03 nos. single phase CTs and 03 nos. single phase PT.
CT-PT Combined units are used for both indoor/outdoor applications.
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Digital meter  The Digital panel Meters indicates the voltage, current, freuency, power factor, kilowatt in a single phase and three phase system.
DIGITAL VOLTMETER (AC AND DC)
Range : 0 to 1000V AC OR DC Input voltage : 240 VAC Type ; 3 1/2 Digits Size : 96 * 96mm sq. 72 * 72mm sq.
DIGITAL AMPAREMETER (AC OR DC)
Range : 0 to 20A AC OR DC (Higher Ranges in AC or DC With CT & Shunt) Input voltage : 240V AC Type : 3 1/2 Digits Size : 96 *96mm sq. : 48 * 96mm sq.
DIGITAL FREQUENCY METER
Range : 0 to 99.9 Hz Input voltage : 240 V AC Type : 3 Digits Size : 96 * 96mm sq. : 48 * 96mm sq.
DIGITAL POWER FACTOR METER (SINGLE PHASE & Three phase system)
DIGITAL KILOWATT METER ( THREE PHASE FOUR WIRE SYSTEM)
DIGITAL TEMPERATURE CONTROLER ( J, K, PT100 TYPE)
DIGITAL TIMERS (TWO OR THREE DIGIT) | | | Request for Full Quote |
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