Saara Series – (RMU)
SAARA Series of Ring Main Units (RMU’s) are factory assembled, sealed for life, compact SF6 switchgear for secondary distribution for 12kV voltage class. These automation ready units are offered with extensible and non-extensible construction for indoor and outdoor applications. Various interrupting and switching combinations with single busbar can be provided.
SAARA Series of Ring main units have SF6 as it’s dielectric medium . these units come in motorized versions which van be operated locally through push buttons and remotely through SCADA.
Extensible
SF6 Insulated
Motorized
SCADA Compatible
Front access cable termination
- DIN 400c bushings for easy access
- Cable connection can be given by using a 3 core cable or 3 single core cables
- Cable compartment is earthed and interlocked allowing access in EARTH ON condition only
Mimic door with SLD
A mimic door with SLD helps operators to clearly view the mechanism and indicators for safe operation of the equipment
Gas pressure indicators
Gas pressure indicators are fitted to the tank with clear scale and color indications to endure safe operation. The status of gas pressure between safe and unsafe levels can also be monitored through SCADA
Feeder Manager (MF790c)
Metering
Protection
Communication
Annunciation
MF790c is a comprehensive numerical relay with in built metering, protection, control, communication and annunciation, covering all your metering and protection schemes.
- 64 energy parameters
- Maximum demand controller
- Cold load pick up
- Trip circuit supervision healthy
Application
- Secondary distribution
Market Segments
- Utilities
- Commercial spaces
- Industries
- Military engineering services
- Oil & Gas
- Infrastructure
- Ports
Technical data for circuit breaker
| Parameters | Values |
|---|---|
| System Voltage | 12kV |
| Rated Voltage | 11kV |
| Rated normal Current | 630A |
| Short time current withstand capacity | 21kA |
| Rated Frequency | 50Hz. |
| Power frequency withstand voltage | 38kV(rms) |
| Lightning impulse withstand voltage | 95kV peak |
| Short circuit breaking current for circuit breaker | 21kA/3Sec and 25kA/1Sec |
| Short circuit making current for circuit breaker | 52.2kA and 62.5kA |
| Internal arc withstand capacity | 21kA/1sec |
| Degree of protection (indoor) | CRCA IP4X SS Tank IP67 |
| Degree of protection (outdoor) | CRCA IP54 SS Tank IP67 |
| Design ambient temperature | 50 ̊C |
| Rated insulation level | 12/38/95 |
| Cable entry | Front |
| Configuration of RMU | 1Way, 2 Way, 3Way, 4 Way, 5Way, 6 Way etc |
| Site extensibility | Both side (Left and Right ) |
| Operating Sequence | O-.3S-CO-3M-CO-3M-CO |
| Dielectric medium | SF6 |
| Breaking medium | Vacuum |
| Operating Mechanism | Spring |
| Mechanical life | 10,000 Operations |
| Electrical life at rated current | 100 Operations |
| Auxiliary voltage | 24V |
| Relevant standards | IEC 62271-200, IEC 62271 – 100, IEC 62271 – 103, IEC 62271 – 102 etc |
SAARA is fully type tested as per the latest revision of IEC standards
- IEC 62271-100 Alternating current circuit breakers
- IEC 62271-200 AC metal enclosed switchgear and control gear
- IEC 62271-1 HV switchgear and control gear
- IEC 60255 Measuring relays and protective equipment
SAARA is fully type tested as per the latest revision of IEC standards
- IEC 62271-1
- IEC 9920
- Description
12kV - Nominal System Voltage
11kV - Highest System Voltage
12kV - Rated One Minute Power Frequency Withstand Voltage
28kV - Rated Lightning Impulse Withstand Voltage
75 kVp - Rated Continuous Current
up-to 1250A - Rated Short Circuit Breaking Current
25kA - Rated Short Circuit Making Current
62.5kAp - Rated Short Time Withstand Current
25kA/3sec. - Rated Peak Withstand Current
62.5kAp - Rated Operating sequence
0-0.3sec.-CO-3min-CO - Degree of Protection (Indoor)
IP4x - Degree of Protection (Outdoor)
IP55 - Standards
IS/IEC 62271-1, 100, 200, IEC 60529 - Current Sensing Rating Available
60A, 250A & 750A - Voltage Sensing Rating
11kV/√3 / 2V/√3 - Accuracy of Multifunction Meter in the Feeder Manager
class 0.2S - Auxiliary Voltage Range for the Feeder Manager
18V to 75V DC or 80V to 280VDC
