The electrical distribution networks are often the subject of fortuitous faults . In other words, following occasional circumstances, without apparent cause.
It is therefore essential to install protection systems .
METAL DEPLOYE RESISTOR offers a neutral point resistance range , or earthing resistance (MALT) depending on your electrical needs and your environments ( NER / NGR ).
Earthing resistance (MALT)
What are the protection systems for electrical distribution networks?
3 types of “neutral” protection
The type of protection depends on the treatment of the neutral line, which can be done via 3 different methods:
- Isolated neutral : for small size and low voltage networks
- Direct earthing of neutral : 20 to 30 times the value of the nominal current
- Earthing of the neutral line with current limitation default
Advantages of protection with resistance ”
Only methods using resistance allow:
- quick and easy fault detection
- to offer reference potential whose stability is suitable
- current control artificially created short circuit
- maximum security for the environment
Our range of earthing resistors (MALT)
Earthing resistors for any application: NER / NGR
We offer different types of “general” resistors and specific to certain applications:
Possibility of integrating all types of accessories
Our resistors can integrate all kinds of accessories: CT, control elements, SIGMA Relay, contactors, switches….
country of intervention
A tailor-made, technical and reliable response for all application sectors
For multiple applications, often with demanding constraints and located throughout the world, METAL DEPLOYE RESISTOR provides a suitable technical solution:
Earthing resistors designed in compliance with current standards
All METAL DEPLOYE RESISTOR earthing resistors are designed in accordance with EC289 and EEE32-1972 standards .
Indeed, these standards define a maximum admissible temperature of the resistor according to the duration of the fault.
This temperature for resistant stainless steel elements is 760 ° C for a short-term fault.
METAL DEPLOYE RESISTOR, is at your disposal to define the specific parameters linked to your needs.