NISHITEI U Series Resistors

Manufacturer: NISHITEI Co., Ltd.
Model: U Series

A newly developed U series metallic resistor is different from the conventional products (V-series). It is an unique construction, low cost and packaging compactly. The U series resistor is rationally designed by a computer on temperature distribution and the limit of temperature rise in the resistors

Features

Temperature management of the resistors by computer designing

It succeeds in equalization of temperature distribution.
The temperature management required is possible.

Success of large cost down

The rise of the productivity by automated manufacturing
Exclusion of the thorough material loss

Success of making compact

One half of the spaces requirement comparing with the conventional products
Weight saving

Establishment of a quick delivery system

Wide selection range of standard unit on capacity and resistance

Further improvement in quality

Hygroscopic insulation parts exclusion
Welding between elements is eliminated

Main applications

Neutral grounding resistors
Inverter braking resistors
Load resistors
Motor starting/braking resistors
Motor control resistor Others

Standards	JIS, JEC, JEM(If required,it is available for other standards such as IEEE, NEMA.)
Cooling method	Dry type, Self cooling
Withstand voltage	Main circuit 2500VAC, 60Hz, One minute
Insulation resistance	Main circuit 10MΩ or more, By 500V megger
Resistor element	Main composition Fe-Cr-Al Stainless steel Temperature coefficient 1.32 x 10-4 /°C
Resistor element temperature rise	Allowable highest temperature rise: 400K(at continuous rating)
Resistance allowable tolerance	Less than ±10% (at 20°C)
Installation Place	Indoor, self-standing mounting type