PowerTek CTH 1 Instructions And Installation

 Power Instrumentation, LCR analysis
 Gain Phase Analysis, PAV
 Current sensors and probes
Transducers

Instructions and installation for the CTH dc current transducers
<<< Important! Serial number of sensor head and signal conditioner should match >>>
Introduction
The CTH dc current transducers will produce a linear voltage or current output proportional to the input current.
Depending on the CTH model, the actual input current and proportional output are indicated on the transducer
label. For example, using a CTH/50A/10V/SC/24Vdc with 1 primary turn, a 0-10Vdc output will be produced for a
0-50Adc input. With ac current signals, the CTH transducers can be used to provide an instantaneous output
signal that can be viewed using an oscilloscope.
ALL CTH CURRENT SENSOR HEADS MUST BE PAIRED WITH THEIR
CORRESPONDING SIGNAL CONDITIONERS (TERMINATION BOX)
The CTH transducer should only be used in dry indoor environments. If the current sensor is detachable,
ensure that the sensor and signal conditioner are matched - refer to serial numbers. When using CTH split
core models (part numbers containing 'SC' i.e. CTH/50/10/SC/24Vdc), ensure the CTH split core is closed
correctly before use and that the conductor is positioned centrally, in the middle 30% of the hole. To prevent
damage, check for correct connection of the power input and measurement output. Installation should be
carried out by authorized personnel, familiar with the risks and dangers of electrical systems. Allow a minimum
warm up period of 15 minutes (required when measuring small current signals) for best accuracy. If an external
dc offset control is fitted, ensure that the CTH output = 0V or 4mA when zero primary current is flowing. For
best performance, high sensitivity models CTH Type 1 and CTH Type 3, with a full scale range less than 5A,
Installation and safety
<<<< WARNING! >>>>
may require dc offset adjustment in situ, during commissioning
1
7 3 Street
rd
Holbrook NY 11741USA
Tel: 631 615 6279
148 Beecham Road
Reading, Berkshire
RG30 2RE England
Tel: 44 1788 519911
Fax: 44 870 0940135
info@powertekuk.com
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Ver 1.0 Aug 15, 2016