Bus-bars differential protection and switch redundancy automated system type ZSZ-7
Application
Small, sectionalised 110 kV switchgears of up to 7 cubicles:
- Single-system switchgears, sectionalised with a disconnecting switch
- Single-system switchgears, sectionalised with a breaker switch, without CT transformer
- Single-system switchgears, sectionalised with a breaker switch, with CT transformer
Advantages
- one multi-purpose device dedicated for all possible switchgear systems with up to 7 cabinets
- additionally equipped with the switch redundancy system
- two criteria for the switch position: current, switch
- two independent activation inputs
- three switch-off circuits
- permeability check in three switch-off circuits for each cabinet
- configuration and settings made by means of PC
- possible co-operation with one- or five ampere transformers
- fault recorder
- software by ENERGOAPARATURA
- LINUX operating system
Construction
1. Front view
2. Couplings side view
Technical data
| Supply voltage | |
| Supply voltageUPN |
2 x 220VDC |
| Binary input voltage | 220VDC |
| Power consumption by supply circuits | < 60W |
| Permissible auxiliary voltage range | 0,8 … 1,1 UN |
| Current inputs | |
| Rated current JN | 1A lub 5A |
| Rated frequency | 50 Hz |
| Current circuits capacity | 2JN |
| Current circuits thermal resistance | 100JN; 1s |
| Current circuits power consumption | 0,2VA/f |
| Relays starting current settings range | 0,1-2,0 J/JN (co 0,05 J/JN) |
| Współczynnik powrotu przekaźników prądowych | 0,99 |
| Relays recovery ratio | 12ms |
| Relays recovery time | max 20ms |
| Pick-up time | 50 … 500ms (co 2ms) |
Switch-off circuits number |
2-3 per cubicle |
| Switch-off relays | |
| Contact capacity | switch-on 5A DC switch-off 3A DC 3A for L/R=40 ms |
| Insulation | Optical |
| Input cards | |
| Input voltage |
UWES 220VDC |
| Power consumption |
0,3W / input |
| Dimensions | Casket Euro 19”/3U/240mm 483mm x 132,5mm x 294mm |
| Insulation electrical resistance | 2kV - 50Hz - 1min. |
| Communication protocol | IEC-870-5-103 |
| Recorder | internal, 45000 incidents |
| Ambient humidity | 85% |
| Operating temperature | -5oC to 40oC |
| Weight | 12kg |