REW600 water cooled power resistors wirewound, aluminum

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REW600 water cooled power resistors wirewound, aluminum

Features

Balanced cooling
Low induction windings
Moulded - in insulated cable terminations
High power for small size

Having been originally designed for use in thyristor protection circuits, the REW600 is most suitable where water cooling is available and space is limited. The withdrawal of heat, internally and externally, ensures a low temperature gradient across the unit reducing internal stress. Heat is extracted internally through the cooling pipe and externally by direct mounting onto chassis or additional water - cooled heatsink, thereby reducing temperature gradient across internal insulation.

Applications

REW resistors for pulse applications
Maximum overload
Inductance values
Low ohmic values
Special terminations
Alternative aluminum housing designs and mountings

Electrical specifications

Power Rating On Standard Heat Sink @25°C	Resistance Range Ohms	Limiting Element Voltage DC/AC RMS	Voltage Proof AC Peak	△R%Stability △R PER 1000HRS	Typical Surface Temperature Rise °C/W Standard Heat Sink Mounted	Standard Heat Sink (Aluminum RTH)
600W	R1 - 50K	2200V	3000V	3%	0.19°C/W	0.04°C/W

Performance

Test Item	Specifications
Tolerance	Standard J(±5%), please consult Vitrohm for closer tolerances
Temperature Coefficients typical values	Below 1R 100(10⁻⁶/K).For lower TC's please consult the factory
Insulation resistance(Dry)	≥10000MΩ
Power dissipation high ambient temperature	Dissipation derates linearly to zero at 200°C.
Low inductive(NREW600)	Specify by adding N before the REW code e.g. NREW. Max value for NREW600 is 12K5 ohms.
Insulation resistance(Dry)	≥10000MΩ
Construction	Water pipe & wound former is encapsulated in an aluminum housing ensuring good humidity seal and a high level of voltage protection.
Water pipe	Copper - other materials available on request.
Core	High Alumina Ceramic with high thermal conductivity and capable of withstanding severe thermal shock. It’s ground finish ensures maximum contact with the resistive element for rapid heat transfer.
Element	Copper nickel alloy or nickel chrome alloy depending on ohmic value.
End caps	Stainless steel.
Encapsulant	High temperature moulding compound
Housing	Anodised aluminum
Terminals	Insulated flexible cable. Maximum length 610mm each end.

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Resistor Supplies - Jepsun Tech Corporation

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