TTRM Series

Transformer Turns Ratio Meter

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SCOPE’s Single Phase (TTRM 101 / TTRM 102) and Three Phase (TTRM 301 / TTRM 302), Transformer Turns Ratio Meters are rugged yet light weight and highly reliable instruments to measure turns ratio of transformers in live switchyards up to 765kV. TTRM is equally suitable for use on manufacturing shop floor and test laboratories. It can be used for testing of single / three phase power transformers (star or delta connected, with or without neutral), CTs and PTs.

Key Features & Capabilities

Measures Turns Ratio, Excitation Current and Phase Deviation between HV and LV windings of three phase and single phase transformers
Automatic Vector Group Detection of three phase transformers*
Automatic Tap Position indication
7” colour TFT display with touch screen and interactive menu makes it easy to use
In-built memory and thermal printer is Displays, prints and stores test reports in the form of text header and tabulated test results
In-built real time clock facilitates test time stamping on each record enabling time references for future
Ethernet port to communicate with laptop / computer
USB interface for connecting pen drive for quick data backup at any location
Powerful Windows based software, ‘CTrans TTRM’ offers creation of Transformer identity and upload it to the Field test results are automatically stored under selected ID. Test results it can be downloaded from instrument to computer for viewing, storage and analysis. Test report can also be generated
Housed in ultra-rugged IP 67 class molded carrying case for enhanced transport-worthiness
The instrument is supplied with Test Lead Set suitable for testing EHV transformers
Type Tested as per IEC 60068-2, IEC 61326-1, IEC 61010-1, CE

SCOPE also offers other basic models namely TTRM 101 and TTRM 301.

Note : *- Feature available only in TTRM 302

TECHNICAL DATA

Full Product Specifications

Parameters	TTRM 101	TTRM 102	TTRM 301	TTRM 302
Configuration	Single Phase	Single Phase	Three Phase	Three Phase
Excitation Voltage	10V, 40V and 100V
Turns Ratio Range	0.8 to 20000
Turns Ratio Accuracy & Resolution	Best Accuracy: Value ± 0.03% ± Resolution @ 100V ; Resolution: 5 digits
Excitation Current Range	–	Up to 2A	–	Up to 2A
Excitation Current Accuracy & Resolution	–	Accuracy: Value ± 1mA ± resolution Resolution: 1mA	–	Accuracy: Value ± 1mA ± resolution Resolution: 1mA
Phase Deviation Range	–	± 180 Degrees	–	± 180 Degrees
Phase Deviation Accuracy & Reso-lution	–	Accuracy: ±0.05°± resolution Resolution: 0.05°	–	Accuracy: ±0.05°± resolution Resolution: 0.05°
Automatic Vector Group Detection	–	–	–	Yes
OLTC Control	Yes
Memory	100 transformer IDs, 1000 records each
Communication	Ethernet, USB
Power	110 V/230V AC ± 15%, 50/60 Hz ± 10%, 75VA
Dimensions	435 X 315 X 175 mm
Weight	10 kg

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