11kv - 36kv Gas Insulated Steel Plate Medium Voltage Switchgear

iSafeRing is a SF6 insulated ring main unit for the secondary distribution network. iSafeRing can be supplied in 10 different configurations suitable for most switching applications in 12/24/36 kV distribution networks.

Product Details Company Profile

Description

Model NO.: iSafering
Shell Material: Steel Plate
Installation: Fixed
Current: AC
Rated Frequency: 50Hz
Lightning Impulse Withstand Voltage: 95/95/125
Trademark: UNISUN
Specification: 12KV/24KV
HS Code: 85372090

Certification: VDE, CCC
Voltage Level: Medium Voltage
Structure: Embedded
Rated Voltage: 12/ 17.5/ 24kv
Power Frequency Withstand Voltage: 28/38/50
Rated Normal Current: 630A
Transport Package: Wooden
Origin: China

iSafering SF6 insulated Ring Main Unit
Gas Insulated Ring Main Unit
iSafeRing is a SF6 insulated ring main unit for the secondary distribution network. iSafeRing can be supplied in 10 different configurations suitable for most switching applications in 12/24/36 kV distribution networks. As an option, iSafeRing can be delivered as extendable ring main unit.
Together, iSafeRing represent a complete solution for 12/24/36 kV secondary distribution networks.

C - Cable switch module	F - Cable switch module	V - Cable switch module
D - Direct cable connection module	De - Direct cable connection module with earthing switch	M - Metering module

Modularity and external busbar
All modules except the metering module and circuit-breaker module are only 325 mm wide.
Transformer protection
iSafering offers a choice between a switch fuse combination and circuit breaker with relay for transformer protection. The switch fuse combination offers optimal protection against short-circuits, while the circuit breaker with relay option offers better protection against low overcurrents. Circuit breaker with relay is always recommended for larger transformers.
Normal operation conditions
The rated characteristics of the switchgear are valid under the following ambient conditions:
minimum ambient temperature: - 25 °C
maximum ambient temperature: + 40 °C
For different temperature ranges, please contact your UNISUN sales representative.
Standards
iSafeRing/iSafePlus is tested according to following
IEC-standards:
IEC 62271-1/IEC 62271-100/IEC 62271-102/IEC 62271-103/IEC 62271-105/IEC 62271-200/IEC 60529

Upper front cover
1. Manometer
2. Nameplate module
3. Short circuit indicator
4. Capacitive voltage indication
5. Load break / earthing switch position indicator
6. Push buttons close/open operation
7. Charged spring indicator
8. Self-powered protection relay
9. Vacuum circuit-breaker position
10. Operation shaft
11. Padlock device
Lower front cover
12. Nameplate switchgear
13. Fuse blown indicator
14. Disconnector / earthing switch position indicator
15. Capacitive voltage indication
Cable compartment cover
16. Cable compartment cover standard
17. Cable compartment cover with inspection window
18. Support bar (removable)
Side cover
19. Lifting lug
20. Operating handle (standard on right hand side)

Technical data

SafeRing		C-module		F-module		V-module
SafeRing		Switch disconnector	Earthing switch	Switch-fuse disconnector	Downstream earthing switch	Vacuum circuit-breaker	Earthing switch/ disconnector
Rated voltage	Kv	12/17,5/24	12/17,5/24	12/17,5/24	12/17,5/24	12/17,5/24	12/17,5/24
Rated frequency 5)	Hz	50/50/50	50/50/50	50/50/50	50/50/50	50/50/50	50/50/50
Power frequency withstand voltage	kV	28/38/50	28/38/50	28/38/50	28/38/50	28/38/50	28/38/50
Lightning impulse withstand voltage	kV	95/95/125	95/95/125	95/95/125	95/95/125	95/95/125	95/95/125
Rated normal current	A	630/630/630		2001)		200/200/200
Breaking capacities:
active load	A	630/630/630
closed loop	A	650/650/650
off load cable charging	A	140/140/140
off load transformer	A			20/20/20
earth-fault	A	205/160/160
earth-fault cable charging	A	117/91/91
short-circuit breaking current	kV			see2)		16/16/16
Making capacity	kV	52,5/40/40	52,5/40/40	see2)	12,5/12,5/12,5	40/40/40	40/40/40
Short time current 3 sec. 3)	kV	21/16/16	21/16/16			16/16/16	16/16/16