High Voltage Test Equipment
Three-Phase Induction Voltage Regulator
Vertically mounted induction voltage regulator built like a wound-rotor motor, with electric and manual worm-gear drive, raise and lower direction indicators, limit switches and a stopper. Input and output terminals are brought out to a terminal board in the junction box.
Overview
Vertically mounted induction voltage regulator built like a wound-rotor motor, with electric and manual worm-gear drive, raise and lower direction indicators, limit switches and a stopper. Input and output terminals are brought out to a terminal board in the junction box.
Application Scenarios
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Scope of application and working conditions: the operating environment of the regulator must be at an altitude no higher than 1000 m, with an ambient medium temperature no greater than +40 ℃ and a relative air humidity no greater than 85%. The regulator is used in an environment free of chemically corrosive gases and vapours, in an atmosphere without explosive hazardous gases, and in a location not exposed to rain ingress.
In general, unless a current-limiting device is added, two or more units cannot be used in parallel.
Structural features: the regulator structure divides into two parts, the main body and the transmission control.
The main body is like a wound-rotor asynchronous motor, consisting of a stator, a wound rotor and two end covers, front and rear, and it is installed vertically. Regulator windings are generally a double-layer short-pitch lap winding for three-phase units and a single-layer concentric winding for single-phase units.
The transmission control is dual-purpose, electric and manual, and is clearly marked with raise-voltage and lower-voltage direction indicator plates. The electric and manual transmission consists of two pairs of worm gears and worms, a handwheel, a drive motor, a limit switch and a stopper. The first pair of worm gear and worm is assembled with the drive motor to reduce the motor speed and drive the second pair. In normal service the servo motor on the regulator is controlled to run forwards or backwards from the buttons of the remote control device, changing the regulator output voltage. The handwheel drive is normally used for fine voltage adjustment, and also ensures that the regulator can still be adjusted normally if the drive motor fails. The limit switch cuts off the motor supply automatically when the regulator output voltage reaches its upper or lower limit, while the stopper restricts the rotor to rotation within the specified mechanical angle.
Wiring: the input and output connections of the regulator are all made on the terminal board inside the junction box on the machine body. Input terminals are marked A, B and C for three-phase units, or A and X for single-phase units. Output terminals are marked a, b and c for three-phase units, or a and x for single-phase units.
Technical Specifications
| Altitude | Not exceeding 1000 m |
|---|---|
| Ambient medium temperature | Not greater than +40 ℃ |
| Relative air humidity | Not exceeding 85% |
| Atmosphere | Free of chemically corrosive gases and vapours; no explosive hazardous gases |
| Installation | Location not exposed to rain ingress |
| Parallel operation | Two or more units cannot be used in parallel unless a current-limiting device is added |
| Structure | Main body plus transmission control; vertically installed |
| Main body | Stator, wound rotor and two end covers, as in a wound-rotor asynchronous motor |
| Three-phase winding | Double-layer short-pitch lap winding |
| Single-phase winding | Single-layer concentric winding |
| Transmission control | Electric and manual dual-purpose, with raise-voltage and lower-voltage direction indicator plates |
| Transmission components | Two pairs of worm gears and worms, handwheel, drive motor, limit switch and stopper |
| Input terminal markings | A, B, C (three-phase) or A, X (single-phase) |
| Output terminal markings | a, b, c (three-phase) or a, x (single-phase) |
Frequently Asked Questions
What operating conditions does the regulator require?
Can two or more regulators be operated in parallel?
How is the output voltage adjusted?
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