goehringer electrical components Germany goehringer model goehringer price

goehringer electrical components are instruments that measure by converting high primary current to low secondary current based on the principle of electromagnetic induction. A current transformer consists of a closed iron core and windings. Its primary winding has very few turns and is connected in series in the circuit where the current needs to be measured. Therefore, the full current of the line often flows through it. The secondary winding has more turns and is connected in series in the measuring instrument and protection circuits. When the current transformer is in operation, its secondary circuit is always closed, so the impedance of the coils connected in series with the measuring instrument and protection circuit is very small, and the operating state of the current transformer is close to a short circuit. The current transformer converts high primary current to low secondary current for measurement; the secondary side must not be open-circuited. The principle of the current transformer is based on electromagnetic induction. A current transformer consists of a closed iron core and windings. Its primary winding has very few turns and is connected in series in the circuit where the current needs to be measured, so the full current of the line often flows through it. The secondary winding has more turns and is connected in series in the measuring instrument and protection circuits. When the current transformer is in operation, its secondary circuit is always closed, so the impedance of the coils connected in series with the measuring instrument and protection circuit is very small, and the operating state of the current transformer is close to a short circuit.

goehringer electrical components function

The main purposes of disconnect switches (knife switches) are: 1, used to isolate the power supply, disconnecting high-voltage maintenance equipment from live equipment, creating a clearly visible break point between them. 2, disconnect switches cooperate with circuit breakers to perform switching operations as required by the system operating mode, thereby changing the system wiring configuration. 3, used to connect or disconnect low-current circuits. Disconnect switches can perform the following operations: make or break bypass currents of closed-loop switches; make or break the grounding wire of the transformer neutral point, but if an arc-suppression coil is connected to the neutral point, operation is only permitted when the system is fault-free; make or break voltage transformers and surge arresters; make or break the capacitive current of busbars and equipment directly connected to the busbars; make or break no-load lines with capacitive current not exceeding 5 amperes; triple-pole disconnect switches can make or break loads with voltage at 10 kilovolts and below, and current below 23 amperes, etc. When operating disconnect switches, note that when energizing a line, first close the busbar-side disconnect switch, then close the line-side disconnect switch, and finally close the circuit breaker. When de-energizing a line, first open the circuit breaker, then open the disconnect switch. Do not make or break high-voltage disconnect switches under load.

goehringer electrical components classification

a. By material: silicon transistors, germanium transistors. b. By structure: NPN, PNP. c. By function: switching transistors, power transistors, Darlington transistors, photosensitive transistors, etc. d. By power: low-power transistors, medium-power transistors, high-power transistors. e. By operating frequency: low-frequency transistors, high-frequency transistors, ultra-high-frequency transistors. f. By structural process: alloy transistors, planar transistors. g. By mounting method: through-hole transistors, surface-mount transistors.

goehringer electrical components parameters

1. Nominal varistor voltage: refers to the voltage value across the varistor when a pulse current of specified duration passes through it. 2. Voltage ratio: refers to the ratio of the voltage value generated by the current of the varistor to the voltage value generated by the current of the varistor. 3. Maximum limiting voltage: the peak voltage across the varistor under the maximum pulse peak current Ip that the varistor can withstand and under the specified waveform. 4. Residual voltage ratio: when the current passing through the varistor is a certain value, the voltage generated across it is called the residual voltage for this current value. The residual voltage ratio is the ratio of the residual voltage to the nominal voltage. 5. Current handling capacity: current handling capacity, also known as current flow, refers to the maximum pulse current value allowed to pass through the varistor under specified conditions. 6. Leakage current: leakage current, also known as standby current, refers to the current flowing through the varistor when the varistor is at the specified temperature and maximum DC voltage. 7. Voltage temperature coefficient: refers to the rate of change of the nominal voltage of the varistor within the specified temperature range, i.e., the relative change in voltage across the varistor when the temperature changes while the current passing through the varistor remains constant. 8. Current temperature coefficient: refers to the relative change in current flowing through the varistor when the temperature changes while the voltage across the varistor remains constant. 9. Voltage nonlinearity coefficient: refers to the ratio of the static resistance value to the dynamic resistance value of the varistor under a given applied voltage. 10. Insulation resistance: refers to the resistance value between the lead wires of the varistor and the insulating surface of the resistor body. 11. Static capacitance: refers to the inherent capacitance of the varistor itself. 12. Rated power: the maximum power that causes the varistor voltage to change when operating at a specific ambient temperature. 21. Maximum surge current: the maximum surge current that causes the varistor voltage to change when the varistor is impacted by a specific pulse current once or twice.

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