01 / 04 · Made in India100%
Designed in India
Every CSD instrument is designed and built in-house for Indian grid conditions — extreme heat, dust, monsoon humidity and long field shifts far from the nearest service van.
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About CSDEst. in India
We build the instrumentsthat make powernetworks measurable, safeand reliable every single day.
CSD Instruments designs, manufactures and services precision diagnostic test equipment built for Indian power networks and demanding field conditions spanning underground cable fault location, phaser measurement and substation battery testing. Every instrument is engineered for heat, dust and long field shifts, calibrated in-house against traceable standards, and backed by engineers who train crews and support them on site, so utilities can locate faults quickly, verify phase relationships with confidence and keep battery banks ready long before an outage ever occurs.
CSD Instruments was founded to give Indian utilities world-class test equipment — designed, built and supported right here at home.
Learn moreOur products
Precision for every
layer of the grid.
Diagnostic instruments for underground cables, phase measurement and battery systems. Built to find, verify and protect in the field.
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0133 kV
Max cable class
UG Cable Testing
Surge generatorsTDR reflectometersAcoustic pin-pointers
Fault pre-location, pin-pointing and route tracing for underground networks up to 33 kV.
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02120°
Phase verified
Phaser Measurement
Phase angle metersVector analysersPhase sequence indicators
Phase angle, sequence and vector analysis for confident commissioning and protection checks.
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03C10
Discharge rated
Battery Testing
Discharge load banksImpedance testersCell monitors
Capacity, impedance and discharge testing that keeps substation DC systems ready when it counts.
View detailsWhy utilities choose CSD
Four reasons crews trust our readings.
02 / 04 · Calibrated accuracy±0.1%
Traceable accuracy
Each unit is calibrated in our own lab against traceable reference standards and ships with a documented certificate, so every reading holds up in audits and reports.
03 / 04 · Service response24 h
Support on the ground
Our application engineers train your crews on site and our service centre handles repair, recalibration and spares — keeping your instruments in the field, not on a shelf.
04 / 04 · Instruments deployed10,000+
Utility proven
Trusted by state DISCOMs, transmission utilities and EPC contractors across India — instruments that keep working season after season, feeder after feeder.
Field reel
See CSD at work
across India's grid
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Repeat customers
Trusted by India's power sector
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Testimonials
What our clients say about us
Engineers across utilities, EPC contractors and power plants rely on CSD in the field.
01ClientUG Cable Testing
“CSD's cable fault locator cut our average outage restoration time dramatically. Their field team trained our crews in a single visit.”
02ClientPhaser Measurement
“The phase angle meter is now standard kit on every substation we commission. Accurate, simple and reliable.”
03ClientBattery Testing
“Their battery discharge testers gave us real confidence in our DC systems. Service response has been excellent.”
04ClientField Service
“Rugged instruments and honest support. We've worked with CSD for years and keep coming back.”
InsightsNotes from
Notes from
the field
Application notes, guides and company news from our engineers — practical reading for crews testing cables, phasing and batteries.
01/04
Pre-locating faults in mixed XLPE and PILC cable networks.
Application note · Sep 2026
Application noteFault Pre-location
Pre-locating faults in mixed XLPE and PILC cable networks.
CompanyNetwork Expansion
CSD expands its field service network across South India.
GuideBattery Health
How often should substation batteries be discharge tested?
Technical notePhase Verification
Getting phasing right before energising a new feeder.
Contact Us
Tell us what you need to test and where — our application engineers will reply within one working day.
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