Transducer #261722

We are offering voltage transducerthe voltage transducer ste-a-1t converts a sinusoidal ac voltage signal into an output signal that can serves several receiving instruments such as indicators, recorders, alarm units etc. The input voltage is scaled down using a voltage transformer t. The output of the transformer is rectified and filtered in a precision absolute amplifier a, incorporating integrated circuits. The amplified filtered output is proportional to r.m.s value of the sine wave input. The output is fed to a current converter 'c' to provide a load independent d.c. Current.

We are offering current transducerthe current transducer ste-a-1t converts a sinusoidal ac current signal into an output signal that can serves several receiving instruments such as indicators, recorders, alarm units etc. The input current is scaled down using a current transformer t. The output of the transformer is rectified and filtered in a precision absolute amplifier a, incorporating integrated circuits. The amplified filtered output is proportional to r.m.s value of the sine wave input. The output is fed to a current converter c to provide a load independent d.c. Current.

We are offering active energy transducerthis transducer is used for measurement of active energy for single phase (ste-a-14t) system as well as for 3-phase, 3-wire (ste-b-14t) system and 3-phase 4-wire (ste-c-14t) systems with balanced and unbalanced load. This is fully solid-state instrument, which can be interfaced directly with digital data acquisition system. The input currents are galvanically isolated and suitally scaled down by transformer t1, t2 etc. The voltage are scaled down by high impedance resistor networks. Depending on the system one or more electronic multipliers m1, m2 etc are used. The multiplying circuit used is the popular time division multiplication method. The implementation of the tdm technique as designed by situ makes the accuracy of multiplication dependent only on a few precision resistors and a low temperature coefficient reference zener. The outputs of the multipliers are summed up and fed to a precision voltage to frequency converter f. The frequency converter converts the input voltage to a proportional frequency by using "state-of-the-art" charge feedback technique. The output of the frequency converters in the form of pulses, which is then divided by using digital technique, the division factor depending on the input transformation ratios. The divided pulse rate is then output as a potential free contact.

We are offering tap position transducerthis transducer is used for measurement of the mechanical position of an external device or equipment. The mechanical position of the external device (transformer tap change gear) is converted to a resistance value with a potentiometer or a resistor network by a rotary switch arrangement. The output ( which is a load independent current or voltage) is proportional to the ratio of the resistance value at a position (tap) to the maximum resistance value in the network [i.e. Resistance value at the maximum position (tap)]. The output can be connected directly to indicating instruments, data transmission system, computer systems or scada systems.

We are offering reactive power transducerthis transducer is used for measurement of reactive power for single phase (ste-a-4t) system as well as for 3-phase, 3-wire (ste-b-4t) system and 3-phase 4-wire (ste-c-4t) systems with balance and unbalanced load. They are suitable for measurement of both import and export of power. The output is a load independent dc current or voltage which is proportional to input power. The output can be connected directly to indicating instruments or to data transmission system.

We are offering frequency transducerste-a_5t converts a frequency into an output signal that can serve several receiving instruments such as indicators recorders, alarm units etc. The input voltage signal is stepped down and galvanically isolated by a transformer t. The zero crossing of the signal is detected to triger a precision quartz controlled monostable circuit q. For each cycle of the input signal, the monostable switches a highly stabilized d.c.voltage to an amplifier a. The output of the amplifier, a constant voltage with fixed pulse width is filtered and averaged. The average signal is proportional to the frequency of the input signal. To suppress the initial range, for instance up to 45hz a fixed voltage is subtracted. The difference is fed to a current converter c to provide a load independent d.c. Current output, which can be either bipolar or unipolar

We are offering dc to dc converter transducer in measuring and control circuit where a direct connection of current carrying circuit is not possible, a galvanic separation is necessary to have an interference-free operation. This transducer converts input dc voltage or current into proportional load independent dc current or voltage at output with galvanic isolation between input and output. This transducer is used mainly as an amplifying and isolating element in telemetering, computer and control systems. The input signal is buffered / amplified / summated (as per the requirement) by a precision operational amp. This signal is fed to a chopper circuit, which drives an isolating transformer. The output of the transformer is synchronously rectified and filtered. The filtered output is fed to a buffer driver which can be factory set to provide various, types of load independent output proportional to the input. The input and output circuits are powered by an isolated supply derived either from an ac auxiliary transformer (for ac auxiliary supplies) or from a dc / dc power converter (for dc auxiliary supplies)

We are offering power factor transducerthe ste-a-7t transducer converts the phase angle between current and voltage of a single phase or 3 phase balanced network into an output signal that can serve several receiving instruments such as indicators, recorders, alarm units etc.