Injection Transformers0 pages

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Injection transformer range
Introduction
When testing the transfer function of a control loop, a ‘disturbance signal’ from which frequency
response analysis can be made is ‘injected’ into the loop.
In order to ensure that the test system does not change the transfer function results, it is important
that the signal generator providing the disturbance signal is isolated from the circuit being tested.
This isolation can be achieved using a transformer or active isolation circuit that meets the
frequency range and voltage isolation requirements of a specific test environment.

Models and specifications
Standard injection transformer
Frequency range:
Turns ratio:
Size:
Voltage rating:
Connectors

10Hz to 200kHz with flatness +0dB -3dB
6.3 : 1
31x92x38mm
50V
BNC Input
Isolated BNC Output

PSM1700 testing an SMPS with a
standard injection transformer

HF injection transformer
Frequency range:
Turns ratio
Size:
Voltage rating:
Connectors

500Hz to 35MHz with flatness +0dB -3dB
2.3 : 1
31x92x38mm
50V
BNC Input Isolated BNC Output

HV injection transformer
Frequency range:
Turns ratio:
Size:
Voltage rating:
Connectors

5Hz to 15MHz with flatness +0dB -3dB
2.3 : 1
31x111x60mm
600V Cat II
BNC Input 2 x 4mm safety connector Output

Low Frequency Injection Module (LFIM) – Opto isolated active circuit
Frequency range:
Turns ratio:
Size:
Voltage rating:
Connectors
Input power:

DC to 100kHz with flatness +0dB -3dB
3.1 : 1
44x110x82mm
600V Cat II
BNC Input 2 x 4mm safety connector Output
12V (Universal power adaptor supplied standard)
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