Vasundhara Performance Solutions is the authorised Hyderabad supplier for the Citel Type 1 (Class I) surge protection device range — IEC 61643-11 / EN 61643-11 Class I / Type 1 SPDs for installation at the main service entrance of buildings with external Lightning Protection System (LPS) per IEC 62305 / IS 15652. Citel DLA series (Type 1+2 combined), DUO series (Type 1+2 combined), and B series (Type 1 standalone) cover Iimp ratings from 12.5 kA to 50 kA per pole on 10/350 µs lightning-current waveform. For industrial substations, telecom towers, hospital + data centre main incomers, and any installation with rooftop air-terminal lightning-protection system. Pan-India dispatch from Secunderabad warehouse.
Request Citel Type 1 SPD Quote Call: +91-9912825442Type 1 (Class I) SPDs are required at the main service entrance of buildings with external Lightning Protection System (LPS) — they discharge direct-strike lightning currents (10/350 µs waveform) before downstream Type 2 SPDs handle residual overvoltages.
Combined Type 1+2 SPD with spark-gap technology. Iimp 12.5 kA / 25 kA / 50 kA per pole (10/350 µs), In 25 kA (8/20 µs), Up ≤1.5 kV. 1P, 1P+N, 3P, 3P+N configurations. Pluggable cartridges, mechanical fault indicator + remote-signalling NC contact. The default Citel Type 1+2 combined SPD for buildings with external LPS — single-device installation simplifies main panel layout.
Higher-energy Type 1+2 combined SPD with enhanced spark-gap performance. Iimp 25 kA / 50 kA per pole, In 50 kA (8/20 µs), Up ≤1.5 kV. For installations with high lightning exposure or where higher discharge capacity is preferred. 1P, 1P+N, 3P, 3P+N. Pluggable cartridges with status indicator. Premium pricing over DLA series.
Type 1 standalone SPD with spark-gap technology — for cascade protection where Type 2 SPDs are installed separately at sub-distribution boards. Iimp 25 kA / 50 kA per pole. Used in installations where Type 1 + Type 2 cascade gives more flexibility than single Type 1+2 combined device. Higher-capacity industrial installations.
DC Type 1+2 combined SPD for solar PV installations with external LPS. 600 / 1000 / 1500 V DC variants. Iimp 12.5 kA / 25 kA per pole on the 10/350 µs lightning-current waveform. For utility-scale solar PV plants with rooftop / array-area air-terminal protection — string combiner box + inverter input protection.
Backup MCBs / fuses + isolators sized for Type 1 SPD installation per IEC 61643-12 / IEC 60364 requirements — typical gG-class fuse 160-250 A for Iimp 25-50 kA SPDs. Coordination components for proper SPD-disconnection on end-of-life short-circuit failure.
Custom Type 1 SPD configurations — railway-application Type 1 SPDs for Indian Railways traction substations + signalling-system protection, specialty marine / offshore Type 1 SPDs, defence-application Type 1 SPDs per mil-spec / IEC 61643-11 hybrid requirements.
Standard property values across the range. TDS / MSDS / per-batch COA available on enquiry.
| Parameter | Test Standard | DLA T1+2 | DUO T1+2 | B Series T1 | DAC50-PV |
|---|---|---|---|---|---|
| Type / Class | IEC 61643-11 | Type 1+2 / Class I+II | Type 1+2 / Class I+II | Type 1 / Class I | Type 1+2 PV / Class I+II |
| Nominal Voltage Un (AC) | — | 230/400 V | 230/400 V | 230/400 V | 1000 V DC (typical) |
| Iimp Lightning Current (10/350 µs, kA) | IEC 61643-11 | 12.5 / 25 / 50 | 25 / 50 | 25 / 50 | 12.5 / 25 |
| In Discharge Current (8/20 µs, kA) | IEC 61643-11 | 25 | 50 | — | 20 |
| Imax Discharge Current (8/20 µs, kA) | IEC 61643-11 | — | — | — | — |
| Voltage Protection Level Up | IEC 61643-11 | ≤1.5 kV | ≤1.5 kV | ≤2.5 kV | ≤4 kV |
| Response Time | — | <100 ns | <100 ns | <100 ns | <100 ns |
| Technology | — | Spark-gap | Spark-gap | Spark-gap | Spark-gap + MOV |
| Status Indicator | — | Mechanical + Remote | Mechanical + Remote | Mechanical + Remote | Mechanical + Remote |
| Mounting | — | DIN-rail 35 mm | DIN-rail 35 mm | DIN-rail 35 mm | DIN-rail 35 mm |
Standards compliance: IEC 61643-11 / EN 61643-11 (Class I / Type 1) · IEC 62305 (Lightning Protection System) · IS 15652 (Indian LPS standard) · IS / IEC 61643-11 · CE marked · UL 1449 (where applicable) · RoHS / REACH compliant · IEC 61643-31 (PV systems for DAC50-PV)
Where Citel Type 1 SPDs ship from our Hyderabad warehouse — by building lightning-protection-class (LPL per IEC 62305) and installation profile.
DLA Type 1+2 combined SPDs at the LV main switchboard of industrial substations with external Lightning Protection System (rooftop air-terminals + down-conductors). Cement plant electrical substations, steel plant power-receiving substations, refinery + petrochemical plant substations. LPL II / III typical for industrial buildings.
B series Type 1 standalone SPDs at the main service entrance of telecom tower-base power cabinets — for 4G / 5G base-station, microwave-link, mobile-tower power infrastructure. Critical lightning-current protection for tower-mounted electronics. LPL I / II typical for telecom towers (high lightning exposure).
DLA Type 1+2 combined SPDs for hospital + data centre main service entrance — tier-3 / tier-4 data centres + tertiary-care hospital main electrical infrastructure. LPL II typical for tier-3 data centre, LPL I for tier-4 + critical hospital infrastructure. Pairs with our Citel Type 2 SPD downstream cascade.
DAC50-PV Type 1+2 DC SPDs at solar PV string combiner boxes + inverter inputs for utility-scale solar plants with rooftop / array-area air-terminal LPS protection. Critical for high-lightning-exposure solar installations across rural Telangana, AP, Karnataka, Maharashtra solar farms.
Specialty Type 1 SPDs for Indian Railways traction substations + signalling-system protection. Railway-specific applications + military-railway protection. Northern, Southern, Eastern, Western, Central, South-Eastern, North-Western, etc. Indian Railways zones.
Type 1 SPDs are mandatory for buildings with external Lightning Protection System per IEC 62305 / IS 15652 — including high-rise commercial buildings, hospital complexes, schools / universities with explicit rooftop LPS, premium residential towers with LPS. Code requirement, not just best-practice.
For panel-builders + EPC contractors + MEP consultants specifying lightning-current SPDs — Iimp rating selection (12.5 vs 25 vs 50 kA) + spark-gap vs hybrid technology + Type 1+2 combined vs separate Type 1 selection shape system performance + insurance + factory-licence compliance.
Genuine Citel France product through Citel India's official distribution channel. Manufacturer authorisation documentation provided on enquiry. Cartridge-traceability from manufacturer to installation site — critical for warranty claims after lightning events.
Stocked SKUs ship same-day from Secunderabad warehouse. Less-common configurations typically 5-7 working days from Citel India stock or factory dispatch. Replacement cartridges stocked for service contracts.
Free SPD coordination calculations for projects where Vasundhara is the supply partner — Type 1 / Type 2 / Type 3 cascade design per IEC 61643-12, distance-rule verification, energy coordination check, fuse / MCB selection for SPD upstream protection.
GeM-registered seller. Citel SPDs available under standing rate contract for PSU buyers. Project-pricing on bulk orders (50+ poles) for OEM panel-builders, EPC contractors, solar EPCs.
One PO for Citel Type 1 SPDs + companion SPDs (Type 1, 2, 3) + downstream isolators + earthing accessories. Reduces vendor count for panel-builders sourcing the complete LV protection kit. See our Citel brand page.
Per-shipment test certificates (CE, IEC 61643-11 / IEC 61643-21 type-test), factory test reports, manufacturer authorisation letters from Citel France. Suitable for IEC 60364 / IS 732 panel-builder audits, MEP consultant submittals, EPC project documentation.
Standard packaging across the range. Bulk pricing on volumes >1,000 L.
| Pack Format | Volume | Typical Use Case |
|---|---|---|
| Pail (HDPE) | 20 L | Single-machine top-up, sample-and-trial orders |
| Drum | 50 L | Mid-duty maintenance stock |
| Barrel (steel) | 210 L | Plant maintenance stores standard |
| IBC Tote | 1000 L (1 MT) | Bulk supply for high-volume users |
| Bulk Tanker | 3,000-5,000 L+ | Direct-to-tank delivery, large plants |
Visit Our Office: H.No. 10-2-309, Flat No. 201, Sudha Vaishnavi Residency, Street No. 4, West Marredpally, Secunderabad, Telangana 500026 | View on Google Maps
Common questions from MEP consultants + EPC contractors + panel-builders sourcing Citel Type 1 SPDs through Vasundhara.
Type 1 SPD is required when the building has external Lightning Protection System (LPS) — rooftop air-terminals + down-conductors connected to earth. The LPS captures direct lightning strikes; the Type 1 SPD discharges the resulting lightning currents (10/350 µs waveform) into the electrical service entrance protection. Buildings without external LPS (most urban commercial / industrial buildings without rooftop air-terminals) typically need only Type 2 SPDs at the main incomer + downstream cascade. Always perform IEC 62305-2 risk assessment to determine LPS requirement + corresponding SPD specification.
DLA series: Type 1+2 combined SPD — single-device installation at main panel covering both lightning-current (Type 1) and downstream-overvoltage (Type 2) functions. Iimp 12.5 / 25 / 50 kA. The simplest installation. DUO series: higher-energy Type 1+2 combined SPD — Iimp 25 / 50 kA, In 50 kA (8/20 µs). For high-exposure installations or larger discharge capacity. B series: Type 1 standalone SPD — used when Type 2 SPDs are installed separately at sub-distribution boards (cascade configuration). For larger industrial installations where cascade gives more flexibility than combined device.
Per IEC 62305-1 + IEC 61643-12: Iimp rating selection depends on Lightning Protection Level (LPL) + number of incoming services (power + telecom): LPL I (highest protection) — Iimp 100 kA total system; LPL II — 75 kA; LPL III — 50 kA; LPL IV (lowest) — 25 kA. Distribute the total Iimp across all incoming services + phases. For typical 3-phase + neutral incomer at LPL II: 25 kA per pole × 4 poles = 100 kA total. DLA / DUO series with Iimp 25 kA per pole satisfies LPL II for most installations. For LPL I: select Iimp 50 kA per pole DLA / DUO.
Yes. Citel Type 1 SPDs (DLA, DUO, B series) are available in configurations compatible with TT, TN-S, TN-C-S earthing systems per IEC 60364. Configuration choice (1P, 1P+N, 3P, 3P+N) is selected based on the specific earthing system — the SPD installation diagram in the Citel datasheet specifies the appropriate connection arrangement. For Indian installations: TN-C-S is most common; 3P+N or 4P (3P + separate N) is the typical Type 1 SPD configuration.
Yes — IEC 61643-11 / IEC 60364 requires Type 1 SPD upstream protection to disconnect on end-of-life short-circuit failure. Citel datasheets specify maximum upstream backup-protection rating per Type 1 SPD model — typically gG-class fuse 160-250 A for Iimp 25-50 kA SPDs, or equivalent MCB. Where the upstream main protection already meets this rating, dedicated SPD backup-protection may be omitted; otherwise install a dedicated SPD-disconnect fuse or MCB in series. We provide upstream-protection sizing as part of the SPD coordination engineering for projects where Vasundhara is the supply partner.
All meet IEC 61643-11 Class I specifications with comparable lightning-current discharge performance. Citel's structural advantages: (1) Focused SPD specialisation since 1937 — wide spark-gap technology range across the Type 1 SPD portfolio, (2) Pluggable cartridge architecture across DLA / DUO / B series simplifies field maintenance + cartridge replacement after lightning events, (3) Strong India distribution + stocking. For OEM panel-builders standardised on Phoenix or Schneider for system-coordination reasons, those alternatives are equivalent. For specification-driven selection (especially where pluggable spark-gap technology matters), Citel typically wins.
Yes. Vasundhara is GeM-registered seller. Citel Type 1 SPDs (DLA, DUO, B series, DAC50-PV) available under GeM rate contract for PSU buyers — Indian Railways, BHEL, NTPC, NLC India, Coal India, ONGC, defence establishments, state cement / steel / power utility corporations + state-utility solar projects. GFR-2017 compliant for deferred-payment supply. Documentation pack includes Udyam-MSME registration, manufacturer authorisation from Citel India, IEC 61643-11 type-test certificates, CE conformity declaration.
Yes. Vasundhara Performance Solutions Pvt Ltd is the authorised Citel surge protection device distributor for Hyderabad, Telangana and Andhra Pradesh. We supply genuine Citel France products through Citel India's official distribution channel, with full manufacturer authorisation documentation provided on enquiry. For our complete Citel portfolio, see our Citel brand page.
Complete Citel SPD portfolio supplied by Vasundhara — single-vendor sourcing for panel-builders + EPC project teams.
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