Eastland Switchgears Pvt. Ltd. (ESPL) is an ISO 9001:2015 certified manufacturer and exporter of Auto Recloser Circuit Breakers and Sectionalizers, established in 1984. Our SDV Series outdoor vacuum reclosers are trusted by NTPC, TATA Power, WBSEDCL, CESC, Coal India and utilities across India and global markets.
📞 Call / WhatsApp: +91 84208 10036 | 📧 Email: info@esplindia.in
Who We Are
Headquartered in Kolkata with our factory at Sankrail Industrial Park, Dhulagarh, Howrah, ESPL has been a trusted name in electrical protection equipment for over 40 years. We are a member of IEEMA, EEPC India and the Control Panel & Switchgear Manufacturers’ Association (COSMA). Our products carry the Make in India certification and are EGAC accredited (CAB # 012226).
Our clients include NTPC, TATA Power, WBSEDCL, CESC, Coal India, NHPC, GSECL, UPPTCL and Indian Railways — organisations with the highest quality and performance standards in India’s power sector.
ESPL SDV Series — Auto Recloser & Sectionalizer
The ESPL SDV Series is a solid-insulated outdoor vacuum auto recloser and sectionalizer rated up to 36kV. Designed for unmanned, harsh outdoor environments, the SDV Series features a maintenance-free magnetic actuator mechanism, embedded current and voltage sensors, and full SCADA compatibility — making it ideal for India’s rural electrification, utility feeders and smart grid programmes.
Standards Compliance
- IEC 62271-100 — Alternating Current Circuit Breakers
- IEC 62271-111 — Pole Mounted Outdoor Recloser
- IEC 60255 — Measuring Relays and Protective Equipment
- IEC 60044-7-8 — Electronic Current and Voltage Sensors
Standard Technical Specifications
| Specification | SDV12 (11kV) | SDV27 (22kV) | SDV36 (33kV) |
|---|---|---|---|
| Rated Maximum Voltage | 12kV | 27kV | 36kV |
| Power Frequency Withstand (Dry & Wet, 60s) | 32kV rms | 60kV rms | 70kV rms |
| Lightning Impulse Withstand | 85kVp | 150kVp | 170kVp |
| Rated Continuous Current | 800A | 800A | 800A |
| Short Circuit Withstand (3s) | 12.5kA | 16.0kA | 16.0kA |
| Fault Breaking Capacity | 12.5kA | 16.0kA | 16.0kA |
| Fault Making Capacity | 31.25kA | 40.0kA | 40.0kA |
| Mechanical Endurance | 10,000 operations | 10,000 operations | 10,000 operations |
| Interrupting Medium | Vacuum | Vacuum | Vacuum |
| Insulation Medium | Solid Dielectric | Solid Dielectric | Solid Dielectric |
| Rated Frequency | 50 Hz | 50 Hz | 50 Hz |
| Ambient Temperature | -10°C to +55°C | -10°C to +55°C | -10°C to +55°C |
| Humidity | 0 to 100% | 0 to 100% | 0 to 100% |
| Altitude | 2200 m | 2200 m | 2200 m |
| Weight (Circuit Breaker) | 120 KG | 230 KG | 230 KG |
| Creepage Distance | >31.5mm/kV | >31.5mm/kV | >31.5mm/kV |
Higher ratings available on request. For altitude above 1000m, IEC 62271-111 correction shall be applied.
Key Design Features
Magnetic Actuators — Maintenance Free
- 100,000 mechanical operations without any maintenance
- Fewer moving parts — no links, latches or lubrication required
- Faster close/open time and low power consumption
- Light weight construction
Vacuum Interruption
Each pole is equipped with a vacuum interrupter using a proprietary casting technique that significantly enhances dielectric strength. This vacuum technology is highly effective for switching capacitive components, making the SDV an ideal solution for overhead line and cable protection.
Hydrophobic Cycloaliphatic Epoxy (HCEP) Insulation
SDV embedded poles are made from high-quality HCEP — a hydrophobic insulation material proven to perform exceptionally well under humid and tropical conditions, making it particularly suited for Indian field environments.
SCADA-Compatible Control Cabinet
The Control Cabinet houses the Advanced Relay, Battery, Battery Charger, Breaker Control Unit and provisions for an FRTU. Rated IP65 for outdoor installation, it supports:
- Communication: Serial TIA-232, TIA-485, Fiber Optic, IRIG-B and Ethernet
- Protocols: IEC 60870-5-103/104, MODBUS and IEC 61850
- DNP 3.0 available
- USB, RS-485 and Ethernet ports
- Pole-mounted or pedestal-mounted installation
Protection Functions
The SDV offers a comprehensive multi-stage protection suite. The Auto Recloser can accommodate up to 8 different protection groups with individually programmable functions:
- Over Current & Earth Fault — 4-stage, IEC & IEEE curves, user-programmable
- Sensitive Earth Fault (SEF) — for high-resistance grounded systems
- Fault Locator — impedance-based, calculates distance to fault
- Under/Over Voltage Protection
- Negative Phase Sequence Overcurrent & Over-voltage
- Broken Conductor / Phase Unbalance
- Thermal Overload Protection
- Under/Over Frequency Protection
- Neutral Overvoltage
- Auto Reclose — up to 5 trips (4 reclose attempts before lockout), configurable dead time
What is an Auto Recloser Circuit Breaker?
An Auto Recloser Circuit Breaker (ARCB) is an intelligent protection device used in medium-voltage overhead distribution networks. When a fault occurs — such as a lightning strike, tree contact or momentary surge — the recloser trips automatically, waits a preset interval, then restores power without any manual intervention.
Research shows that 80–90% of faults on overhead lines are transient in nature. A conventional breaker trips and remains open until a field crew manually resets it — sometimes hours later. An auto recloser resolves the same fault in seconds using the duty cycle: O-DT1-CO-DT2-CO-DT3-CO-DT4-CO, where O = Open/Trip, C = Close, DT = Dead time.
If the fault is permanent, the recloser enters lockout after the final closure attempt and remains open until manually reset by an operator.
Key Benefits
- Reduces customer outage duration dramatically
- Eliminates unnecessary field crew callouts for transient faults
- Improves utility reliability indices — SAIDI and SAIFI
- Supports distribution automation and smart grid self-healing
- SCADA-compatible for remote monitoring and control
Applications
- Utility distribution networks — feeder protection on 11kV and 33kV overhead lines
- Rural electrification — reliable protection where manual response is slow
- Industrial substations — process-critical power continuity
- Smart grid and SCADA systems — remote monitoring, automated fault restoration
- Renewable energy integration — protection for solar and wind feeders
- Self-healing grid applications
- Export markets — Africa, Middle East and Southeast Asia
Optional Accessories Available
- Auxiliary Supply Transformer — pole-mounted, for remote/isolated locations
- 4G Modem — remote control in areas with poor internet connectivity
- Line Isolator — visual isolation on outgoing side for safe maintenance
- Surge Arrestors — protection against voltage spikes on incoming/outgoing side
- Incoming Voltage Sensors — monitoring on both sides, useful in tie-point conditions
- FRTU — programmable controller for telecontrol and automation
Auto Recloser vs Conventional Circuit Breaker
| Feature | ESPL SDV Auto Recloser | Conventional Circuit Breaker |
|---|---|---|
| Fault restoration | Automatic — no crew needed | Manual reset required |
| Response to transient faults | Resolves in seconds | Remains open until reset |
| Maintenance requirement | Maintenance-free magnetic actuator (100,000 operations) | Periodic maintenance needed |
| SCADA / remote control | Standard — IEC 61850, MODBUS, DNP 3.0 | Requires additional equipment |
| Protection functions | Up to 8 groups, multi-stage, programmable | Limited |
| Smart grid compatibility | Yes — self-healing grid ready | Limited |
| Insulation | Solid dielectric HCEP — ideal for tropical / humid conditions | Varies |
Why Choose Eastland Switchgears?
40+ Years of Manufacturing Experience
Established in 1984, ESPL brings four decades of practical knowledge in electrical switchgear manufacturing for Indian and international utility requirements.
ISO 9001:2015 Certified & EGAC Accredited
Our manufacturing processes and quality systems are ISO 9001:2015 certified. ESPL is also EGAC accredited (CAB # 012226) and a member of IEEMA, EEPC India and COSMA.
Proven Client Base
We have supplied to NTPC, TATA Power, WBSEDCL, CESC, Coal India, NHPC, GSECL, UPPTCL and Indian Railways — organisations with the most stringent quality and performance requirements in India.
IEC-Compliant Engineering
Our SDV Series is designed to comply with IEC 62271-100, IEC 62271-111, IEC 60255 and IEC 60044-7-8. All equipment is type-tested and supplied with full documentation.
Export Ready
ESPL exports to Africa, the Middle East and Southeast Asia. Products are packaged for international logistics and meet international quality benchmarks.
Make in India
All ESPL products are manufactured at our factory in Sankrail Industrial Park, Dhulagarh, Howrah, West Bengal — proudly contributing to India’s self-reliance in critical electrical infrastructure.
Frequently Asked Questions
What voltage ratings are available for ESPL auto reclosers?
ESPL manufactures the SDV Series in three ratings: SDV12 (12kV / 11kV system), SDV27 (27kV / 22kV system) and SDV36 (36kV / 33kV system). Higher ratings are available on request.
What is the fault breaking capacity of the SDV auto recloser?
The SDV12 has a fault breaking capacity of 12.5kA. The SDV27 and SDV36 both have a fault breaking capacity of 16.0kA.
What communication protocols are supported?
The SDV Series supports IEC 60870-5-103, IEC 60870-5-104, MODBUS, DNP 3.0 and IEC 61850. Communication interfaces include USB, RS-485 (Rear End), Ethernet and optional 4G Modem.
How many reclose attempts can the SDV perform?
The SDV provides up to 5 trips — meaning 4 reclose attempts before lockout. Each trip can be set as instantaneous (fast) or delayed, and the dead time and reclaim time are fully configurable.
Is the auto recloser suitable for tropical and humid conditions?
Yes. The SDV poles are made from Hydrophobic Cycloaliphatic Epoxy (HCEP), which is proven to perform exceptionally well under humid conditions and across the full ambient temperature range of -10°C to +55°C with 0–100% humidity.
Can the recloser be integrated with SCADA systems?
Yes. The SDV Series is fully SCADA-compatible with support for IEC 61850, MODBUS and DNP 3.0. The control cabinet supports Ethernet, fiber optic and wireless (4G) communication options.
Does ESPL export auto reclosers outside India?
Yes. ESPL supplies to projects in Africa, the Middle East and Southeast Asia. Products are packaged and certified for international export.
What certifications does ESPL hold?
ESPL is ISO 9001:2015 certified and EGAC accredited (CAB # 012226). We are also members of IEEMA, EEPC India and COSMA, and carry the Make in India certification.
Get in Touch — Request a Quote
Looking for a reliable auto recloser manufacturer in India? Contact us with your requirement and we will respond within one working day.
📞 Phone: +(91)-(33)-40075599
📞 Phone: +91 79806 89618
📞 WhatsApp: +91 84208 10036
📧 Email: info@esplindia.in
📧 Email: eastlandswitchgears@gmail.com
Corporate Office: 4A, Pollock Street, Swaicka Center, Room No. 504, 5th Floor, Kolkata – 700001, West Bengal, India
Factory: Sankrail Industrial Park, Dhulagarh, Howrah – 711302, West Bengal, India