Page 4 (40)
Rev 1
2018-03-21
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1 GENERAL DESCRIPTION.
The
is a portable instrument, especially designed to analyze Circuit Breakers in the field.
Even though
is intended for use together with a computer, it can be used stand-alone for some simpler
measurements. To be handy in field works, the
is built into a small and robust metal carry case. On the cover
section of the carry case, a notebook computer can be placed while testing.
The measurements that can be made without a Windows computer are: voltage and current for both motor and coils,
time for three independent contacts in, open, close and close-open operations and static resistance of main contacts.
Contact time measurements.
There are three groups, each of four main and two auxiliary contact indication inputs. Main contact max output 30 mA
during operations and can also indicate pre-insertion resistors simultaneously. Auxiliary contact inputs can handle both
free and live contacts. All contact inputs are of type semi protected banana-jacks and are protected against faulty
connections and high voltage discharges.
Travel transducers.
Up to three, digital or analogue, travel transducers, in any combination, can be used for simultaneous measurements.
Resistance measurement.
Main contact resistance measuring can directly be done with an internal 200 Amp current generator. Both static and
dynamic measuring is possible. Pre-insertion resistor resistance can be measured with use of a reference resistance
Operating coil control.
With an external power supply connected through this section the operating coils can be fully controlled. The current flow
through the coils and the supply voltage are measured.
Motor monitoring.
In the Auxiliary section there is provisions to monitor current and voltage from an external motor supply.
Internal sampling.
Sampling frequency for analogue and digital functions can be programmed for frequencies up to 50 kHz. Note! The PC-
software sets the sampling frequency.
Power supply
The SA10A must powered with an external AC- or DC- power supply.
Environmental
SA10A is built in a small metal carry case designed for rough handling in tough outdoor environments. All connections are
protected for any possible type of electrical discharges and disturbances. Some of the inputs are even protected against
faulty connections up to 300V peak.
PC-Computer
In most cases a standard windows notebook computer can be used but for tougher environments an outdoor type is
recommended. For recommended minimum requirements for the notebook computer. See
BTS11 User manual
PC-software
See separate manual
BTS11 User manual
for more information.