You are missing some Flash content that should appear here! Perhaps your browser cannot display it, or maybe it did not initialize correctly.

Latest News

COMPREHENSIVE PROTECTION FOR LV MOTORS

Fri, 17/02/2012 - 11:14 | by Webmaster

NewElec’s N Series electronic motor protection relays are designed to protect LV motors. They offer the user a choice of protection features, mounting options, and a choice of appropriate motor thermal curves with five models to choose from.  When used with their own integrated current transformers, which incorporate an earth leakage core balance C.T in the same housing, and the inclusion of a 4 to 20 mA loop for monitoring motor loads, significant space and cost savings are achieved.

RELIABLE PHASE ROTATION PROTECTION

Fri, 17/02/2012 - 11:12 | by Webmaster

As it is often important to ensure that machinery does not rotate in the incorrect direction, the inclusion of phase rotation protection within a motor protection relay makes good sense. In the case of NewElec motor protection relays that offer this protection it is achieved by measuring the incoming phase voltage. Thus it is not possible to start the motor should the incoming phases be reversed. There is no relay on the market that will provide such protection for phase reversal that happens at the motor terminal box.

NEWELEC INTRODUCES MA RELAY'S BIG BROTHER

Tue, 14/02/2012 - 09:33 | by Webmaster

NewElec has introduced the new MB relay, the big brother of its successful MA range, aimed at motor protection and plant automation. Locally designed and manufactured, the new MB relay is ISO 9001:2000 compliant and is fully configurable with the aid of free front-end software or a man-machine-interface unit (MMI).

Earth Leakage Protection

Thu, 19/01/2012 - 10:39 | by Webmaster

NewElec’s GA earth leakage protection relay enables more sensitive earth leakage protection of high kilowatt motors started direct-on-line as well as variable speed drive applications without nuisance tripping. This is achieved by the use of harmonic filters. The GA is available in diverse configuration options, including latched or with a non-latching main trip contact, fail-safe or non fail-safe options, as well as 110 V – 220 V or 380 V – 525 V AC auxiliary supply voltages.

Avoiding Short Circuits

Thu, 19/01/2012 - 10:35 | by Webmaster

A short circuit condition occurs when the insulation between the phase conductors fails and the load current level exceeds the normal locked rotor current levels that the motor would draw during start-up.

The fault level of the motor feeder supply determines the current level during a short circuit and will be as high as 15 x to 50 x the motor full load current value.

An investigation to evaluate the ability of existing protection and control systems to determine the level of profitable and safe operation of three phase electric motors

Wed, 11/01/2012 - 11:02 | by Webmaster

S.D. Loudon NewElec Pretoria (Pty) Ltd

www.newelec.co.za

 

Keywords – Motor protection, three phase protection relays, 

Abstract

Reliable Motor Protection for all LV AC Motors

Wed, 07/09/2011 - 10:57 | by Webmaster

NewElec’s LA motor protection relay provides superior thermal overload and phase unbalance protection in applications that would traditionally have used thermal bi-metal relays. This microprocessor-based electronic motor protection relay, designed to IEC 60255-8, provides overload protection for cyclic or sustained loads, as well as providing unbalance current and single phasing protection.

Electronic Motor Protection and Control Relays

Mon, 22/08/2011 - 14:20 | by admin

NewElec’s KA, KB and KC series of electronic motor protection and control relays are housed in a small footprint, DIN rail mount. Fixed thermal curves (Class 15 cold - Class 5 Hot) with thermal pre-loading, match the hot and cold stall times of the motor during operation.

The KA relay is mains powered auto-selecting 400 V or 525 V supply while the KB and KC relays require either 110 V or 220 V AC auxiliary supply.