Video: SAT40A II

Video transcript

How the SAT40A II powers the coils and the motor of a circuit breaker where there is no substation battery. How it is connected, and what it measures on the auxiliary circuit. A breaker test needs voltage for its coils and for its spring charging motor. In a new or disconnected substation, there is no battery to provide it. And even where there is one, the battery cannot test the breaker below or above its rated voltage. The SAT40A II is that source, and it also analyses the coils and the motor.

For separate coil outputs, 2 DC and 2 AC, from 10 to 300 V DC or 10 to 250 V AC, with up to 15 amps. Two motor outputs that take 40 amps of inrush current, all in 11 kg. On the front, the display and the keys, with start buttons for opening and closing. The Omega key for coil resistance, and the motor key. The temperature input and the PC interface. And below, three groups of outputs. Opening coil, closing coil, and motor.

Each with DC sockets in red and black, and AC sockets in blue. It ships with the PC software, the mains, earth and USB cables, and a transport case. The recommended cable set has six leads of two meters with touch-proof banana plugs. Five meter sets, a temperature sensor, the Bluetooth module, and bags are options. output has its own pair of leads. The opening coil output goes to the trip coil through its auxiliary contact. The closing coil output goes to the close coil.

And the motor output supplies the spring charging motor. a power supply, it replaces the substation battery during commissioning and maintenance, with any make-of-circuit breaker analyzer. Because it generates the voltage itself, the breaker can be operated under or over its rated voltage. And with less than 1% ripple, the coil current curves recorded by the analyzer stay clean and comparable. coil outputs are meant for operations, not for continuous voltage.

The motor outputs also work continuously. On 230-volt mains, at 110 volts DC, the motor output gives 30 amps for 30 seconds, 24 amps for 110 seconds, or 15 amps without limit. an analyzer, the first check is the coil itself. A resistance lower than specified points to shorted turns from damaged or burnt insulation. A higher one points to a damaged winding, from overheating or corrosion. The SAT40A II measures it from 1 to 999 ohms, and also the coil current.

trip coil must still work far below the nominal battery voltage. The minimum trip voltage test is fully automatic. Short pulses of 100 ms are applied, 900 ms apart, and each one a step higher, until the breaker trips. The voltage at which it trips is recorded. On the mechanism, it records the motor current and the time the motor takes to charge the spring, as IEC 62271-100 asks. With the temperature sensor, it also runs the temperature

rise test of the auxiliary and control equipment. SAT40A II works on its own or under PC control. The PC software controls every function, adds a voltage-against-time graph to the minimum trip voltage test, and builds the reports. With the circuit breaker analyzers of the same family, one software prepares, runs, and reports the whole breaker test. It is used on low, medium, and high voltage breakers in manufacturing, commissioning, and maintenance, in laboratories,

and in high-induction switchyards, power for coils and motors, coil resistance and current, minimum trip voltage and motor charging time. Circuit breaker testing from Amperis.