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A C High Voltage
D C High Voltage
Cable Fault Locator
Spark Tester
Oil Test Set
High Voltage Probe
CT & PT Test Sets
Transformer Ratiometer
Realy Test Set
Phase Shifting Devices
Phase Angel Meter
Meter Test Benches
 

'SEV' Instrumental Transformer Test Set -ups introduced to carry out the accuracy Test of instrument Transformers & Potential Transformers as per relevant I.S./B.S. specification & other international specifications.

     
Principle :
The C.T./P.T. Test Bridges consists of magnetic balance circuit,which is susceptible to the minutest magnetic unbalance. The method is a comparison method,which compares "under test Transformer" with "standard/refrence transformer".Due to error in transformer the "magnetic unbalance" is set up and same is corrected by "angle errors"& "ratio errors". tha calibrated dials"indicated corrective injection" & thus direct indication of "phase angle error" & "ratio error is obtained".
       
Features : 1)
The current/Voltage at which test is carried out is indicated on DigitalMeters as
     
"percentage for C.T. Test Bridge.". OR Volts (Secondary) For P.T. Test Bridge.
    2)
Calibrated dials have selection as + Zone or- Zone so as to have maximum scale length utilisation.
    3)
Sensitivity control for Null Detector
    4)
Polarity Detection of "Transformer under Test" by 'LED' With 'polarity' position on "multiplier switch".
       
Specification & Ranges
C.T.Test Bridge:   P.T. Test Bridge:
 
a) i)

Suitable for 5 Amps Secondary OR

a) Suitable for 110 Volts Secondary
  ii) Suitable for 5 Amps & 1 Amps Secondary    
b)   Digital Ammeter :0 to 199.9% Primery Current b)

Digital Voltmeter: 0 to 199.9 volts OR 0 to 750 Volts

 
Ratior Error Multiplier Phase Displacement Error.
     
0 To + 0.5%
(with Resolution of 0.01%)
x1 o To + 25 minutes
(with Resolution of 0.5 minutes)

0 TO +2.5%
(with Resolution of 0.05%)

X5 0 To + 125 minutes
(with Resolution of 2.5 minutes)

o To + 10%
(with Resolution of 0.02%)

x20 o To + 500 minutes
(with Resolution of 10 minutes)
     
Enclosure : In a fiberglass casing with detachable lid,lifting Handle etc.
Approx.Dimensions (mms) :
L
400
X B
300
X H
250
Approx.Weight(Kg.) :
12 Kg.        
 
Similar equipments of "OTHER MAKE" undertaken for repairs/ modification/ calibration/servicing.
 

The design and specification are subject to change and improvement and are
not binding.

Designed by : SME