Contact Details:

NewElec (Pty) Ltd

298 Soutter Street cnr Maltzan Street
Pretoria West
Pretoria
0058
South Africa

Tel: +27 (0)12 327 1729
Alt. Tel: 0860 103 041
Fax: +27 (0)12 327 1733

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Starting an electrical drive on a machine that has been standing for a long period of time should be avoided until the insulation level of the motor has been found acceptable. Insulation degradation can occur as a result of moisture ingress in motors which stand for long periods - a situation typically found on plants that work seasonally or in applications where there is a high degree of water contamination. 
 

Insulation is subject to many elements that can cause it to perform at a less-than-acceptable level. Excessive heat or cold, moisture, vibration, dirt, oil, and corrosive vapours can all contribute to deterioration. For this reason, routine insulation testing is necessary.
 

NewElec’s EC/ED relay solves this problem by monitoring the insulation integrity of the motor windings and feeder cables to earth while the motor is standing. The main contactor is prevented from closing into a circuit in which the insulation level to earth has deteriorated to an unacceptable level.

 

The selected ‘lock out’ relay model determines the acceptable insulation level, while the fused measuring circuit protects the relay against inadvertent damage due to incorrect connections.   Compact in design, the EC/ED is suitable for installation in flameproof enclosures.

 

Included in the protection package are the relay, an 11-pin plug-in base and a three-phase choke. The product may be used regardless of the starter configuration.