ProTHERMIC™ PH300-RC Series Wire Preheater

Wire Preheating

The PH300-20-400RC high frequency induction preheater uses rolling contact for shorting the wire, and is for a wide range of wire insulating processes. A proprietary high frequency power unit applies electrical current at the optimum frequency and the precise voltage for the specific conductor being heated. Precision-machined pulleys reduce wear and ensure that an even tension is applied to the wire, ensuring a smooth running process. Low-loss pulley material reduces the amount of heat that is absorbed, improving the efficiency and performance of the preheater. A user-friendly LCD interface is used to set up and display system and product information. The wire passes over a series of pulleys above and below the transformer core.
All pulleys have a ceramic contact surface for zero wear. The short is formed where the inlet and outlet wires touch each other on one of the uppermost pulleys.

Performance

Specification	PH300-20-400RC(LR)-MkII
Wire Diameter (solid)	0.3 – 3.0 mm (0.023 – 0.19 in) AWG 29 – AWG 9
Wire Size (stranded)	2 mm² (0.1 in²) AWG 13
Max Speed	3000 m/min (9842 ft/min)
Max Temperature	400° C (752° F) with HT pulley
Max Power Output	20 kW
Maximum Frequency	1500 Hz
Mains Supply	3 Phase 360-510 V

Technology

The shorting pulley rim is manufactured from a special copper alloy that has high electrical conductivity and good wear resistance.

The insulating pulley is manufactured from resin bonded fabric which has good wear resistance and low thermal conductivity to minimise wire-to-pulley heat loss.

The pulleys are mounted on low friction, double row ball bearings to minimise the drag force (tension increase) on the wire as it passes through the preheater. Both pulleys are precision machined to ensure that uniform tension is applied to the wire, thus reducing SRL problems in data and telecommunications cable applications.

The preheater is powered from a 3-phase mains input, which is converted to a high-frequency supply by a specially designed inverter, the output of which is automatically adjusted to deliver the necessary power to maintain the required “Preset Temperature” regardless of wire size or production speed.

The preheater is fully protected against mains supply phase loss or brownouts.

Connectivity

1 x Analogue input: External temperature setting 0 – 10 V

4 x Programmable Relay Contact

2 x Emergency Stop contacts

MODBUS RTU, PROTON ASCII code or Label Printer
USB using RS232 – USB Converter Cable
RS485 MODBUS RTU, PROTON ASCII code (Not available with PROFIBUS)