Variable Ratio Ring transformers
Single-phase ring variable transformers
RRSP 65-3515
Single-phase ring variable transformers in economy circuit
Input 230V, output 0-230V
Input 230V, output 0-260V
Input 230V, output 0-300V
Input 400V, output 0-400V
The ring variable transformers of the RRSP series meet national, international and prepared future regulations for worldwide use.
Execution:
Open design, stationary, for device installation and assembly in dry rooms, windings in economy circuit, connection to screw terminals. 3-point front attachment, size 65-95 central attachment.
IP 00, up to 2A insulation class E, above insulation class B, max. ambient temperature 40°C (ta40°C/B).
Version with separate winding available on request.
Three-phase ring variable transformers
RDRSP 73-3515
Three-phase ring variable transformers in economy circuit
Input 3AC 400V, output 3AC 0-400V
Input 3AC 400V, output 3AC 0-450V
Input 3AC 400V, output 3AC 0-520V
The ring variable transformers of the RRSP series meet national, international and prepared future regulations for worldwide use.
Execution:
Open design, stationary, for device installation and assembly in dry rooms, windings in economy circuit, connection to screw terminals.
IP 00, up to 2A insulation class E, above insulation class B, max. ambient temperature 40°C (ta40°C/B).
Higher currents, other voltages or versions with separate windings available on request.
Drives and accessories for ring variable transformers
Drives and accessories
- Engines
- Rotary knobs
- Scales
Execution:
Various motor drives and controls are available as options for all single- and three-phase ring actuators. Please specify in plain text when ordering. Attention: The dimensions change for versions with motor and control card. Please ask us directly.
Further options and designs on request.
Single and three phase voltage stabilizer
RSKH series in the power range from 1kVA:
Riedel voltage stabilizers RSKH are used as ballasts in networks with fluctuating voltages. At the output of the voltage stabilizer, a constant voltage is available to the consumer, which is independent of the fluctuating network.
Execution:
Riedel voltage stabilizers consist of a variable transformer with motor drive and a booster transformer, as well as an electronic controller. As soon as this controller detects a voltage deviation from the setpoint at the output of the stabilizer, the motor of the variable transformer is controlled by the controller and the primary winding of the booster transformer is induced. This causes the secondary winding to add or subtract voltage from the network. This lasts until the output voltage corresponds to its setpoint.
The controller itself works as a proportional control amplifier with PI behavior and is located on a plug-in card that also contains the power supply part and the actual value processing. The setpoint adjustment to adapt to the dynamic behavior of the controlled system is done using a spindle trimmer. The motor of the variable transformer is controlled without contact, whereby the control speed depends on the mains voltage, i.e. high control speed with high deviation, low control speed with small deviation. This results in high control accuracy without control oscillations.
Technical data:
Nominal input voltages: all typical networks up to 1 kV Network fluctuations: e.g. ±10%, ±15, ±20% Network frequency: 50/60 Hz or 400 Hz Output accuracy: ±1% Load type: ohmic, inductive or capacitive Efficiency: 98 – 99% Depending on the controller type, duty cycle: S1 operation (100%) Protection class: IP 00
Main Applications:
Machine controls, IT systems, testing facilities and laboratories, medical electronics, monitoring systems, telecommunications systems, process controls, remote controls, air traffic control, oven heaters
possible options:
Protection class up to max. IP65, tropicalized, analog or digital measuring instruments, main switch and fuse, galvanic isolation, maintenance service…