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Description
Technical Sheet
Applications
Downloads
Description
Our neutral earthing resistors are used in the following applications:
earth: prevent damage to grid-connected systems, such as transformers or generators
Features
- Approved and trusted HEINE resistor technology
- rugged design
- variety of materials allowing installation at any site: (indoor, outdoor, on-/off-/nearshore)
- a modular system of standardised enclosures sizes allows short delivery times
Standardised enclosures
| Insulation class | Enclosure Type | Length [mm] | Max. Width [mm] | Height [mm] |
| 12 kV | A1 A2 B C | 920 920 1350 1775 | 1270 1270 1270 1270 | 1306 1768 1768 1768 |
24 kV | A1 A2 B C | 1180 1180 1710 2235 | 1470 1470 1470 1470 | 1422 1948 1948 1948 |
| 36 kV | A1 A2 B C | 1450 1450 2080 2705 | 1470 1470 1470 1470 | 1722 2248 2248 2248 |
Customers
Energy suppliers, transformer and generator manufacturers, renewable energy, Oil & Gas
Technical Sheet
| Nominal Voltage | up to 145 kV |
| Fault Current | up to 10 kA |
| Insulation Class | up to 72.5 kV (higher insulation class available upon request) |
| Protection Class | IP00 – IP55 |
| Enclosure Features | Power Switch |
| IP00…55 | Vacuum breaker |
| Different galvanised and stainless steel grades | Off-load disconnector (manual or motor drive) |
| Powder-coated according to RAL codes | On-load disconnector (manual or motor drive) |
| Fan cooling | Terminal box with 110 or 220 VDCC |
| Special equipment | Service |
| Current transformer | Factory Acceptance Test (FAT) |
| Voltage transformer | Site Acceptance Test (SAT) |
| Thermostat control outgoing air | Customer training |
| NER monitoring system | Spare parts and after-sales service |
| Surge arrester | |
| Neutral transformer resistor |
| Applicable Standards |
| IEC 50386 Bushings up to 1kV and from 250 A to 5kA |
| IEC 60071 – 1 Insulation coordination – Part 1: Definitions, principles and rules |
| IEC 60273 Characteristics of indoor and outdoor post insulators above 1kV |
| IEC 60529 Degrees of protection provided by enclosures (IP Codes) |
| ANSI/IEEE-Std 32 Standard requirements, terminology and test procedure for NER |
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