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 IS/IEC 62305. Citel DS250VG (Type 1+2+3 single-pole), DS252VG and DS254VG (multi-pole), and DACN1-25VGS (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.
Single-pole Type 1+2+3 AC SPD built on CITEL's patented VG technology, rated for direct lightning current to the 10/350 µs waveform. Installed at the main service entrance where a structure has an external lightning protection system. Note: DLA is CITEL's data and telecom protector, not an AC power device.
Two-pole and four-pole assemblies of the DS250VG platform for single-phase and three-phase-plus-neutral supplies. Same VG spark-gap-plus-varistor coordination, factory-assembled so pole coordination is guaranteed.
Three-phase-plus-neutral Type 1+2+3 SPD at Uc 440 V AC, Iimp 25 kA per pole, In 25 kA, Up 1.5 kV, response time 100 ns. Monobloc construction — one unpluggable module per phase. Where a pluggable Type 1 is required use DAC1-13VGS (Iimp 12.5 kA per pole, 275 V); for higher duty use DACN1-35VGS (Iimp 35 kA, Up 1.8 kV).
DC-side Type 1+2 SPD for photovoltaic arrays with direct-strike exposure, available at 600 V, 1000 V and 1500 V DC. The /12KT1 suffix denotes the Type 1+2 rating; the /51 suffix is the Type 2 version. DS60VGPV covers the same duty.
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 | DS250VG-300 | DS252VG-300 | DS254VG-300 | DACN1-25VGS-40-440 | DAC1-13VGS-40-275 |
|---|---|---|---|---|---|
| Type (IEC 61643-11) | Type 1+2+3 | Type 1+2+3 | Type 1+2+3 | Type 1+2+3 | Type 1+2+3 |
| Uc — max continuous operating voltage | 255 V AC | 255 V AC | 255 V AC | 440 V AC | 275 V AC |
| Iimp (10/350 µs) per pole | 25 kA | 25 kA (Itotal 50 kA) | 25 kA (Itotal 100 kA) | 25 kA (Itotal 100 kA) | 12.5 kA (Itotal 50 kA) |
| In (8/20 µs) | 30 kA | 30 kA | 30 kA | 25 kA | 20 kA |
| Imax (8/20 µs) per pole | 70 kA | 70 kA | 70 kA | 70 kA | 50 kA |
| Up — voltage protection level | 1.5 kV (Up-in 1.1 kV) | 1.5 kV L/PE and N/PE | 1.5 kV L/PE and N/PE | 1.5 kV | 1.5 kV L/PE and N/PE |
| Technology | VG — gas-filled spark gap coordinated with a metal oxide varistor | ||||
| Configuration | 1-pole, L/N or L/PE | 1P+N | 3P+N (TN-S) | 3P+N, monobloc | 3P+N, pluggable per phase |
| Response time | not published | not published | not published | 100 ns | not published |
Figures are from CITEL's own datasheets for the variants named in each column. Ratings change with the network-code suffix (-120, -300, -400, -690, -1000) and with the /G, S and VG variants — we confirm the exact part and its ratings against your single-line diagram before quoting.
Standards compliance: IEC 61643-11 / EN 61643-11 (Class I / Type 1) · IEC 62305 (Lightning Protection System) · IS/IEC 62305 (Indian adoption of the lightning-protection standard) · IS / IEC 61643-11 · CE marked · UL 1449 (where applicable) · RoHS / REACH compliant · IEC 61643-31 (PV systems for DS250VG)
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.
DACN1-25VGS 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.
DS250VG 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 IS/IEC 62305 — 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 through GeM 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.
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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.
DS250VG 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. DS252VG 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. DACN1-25VGS: 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 / DS252VG series with Iimp 25 kA per pole satisfies LPL II for most installations. For LPL I: select Iimp 50 kA per pole DS250VG / DS252VG.
Yes. Citel Type 1 SPDs (DS250VG, DS252VG, DACN1-25VGS) 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 DS250VG / DS252VG / DACN1-25VGS 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 (DS250VG, DS252VG, DACN1-25VGS) available to PSU buyers on GeM 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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Specified DEHN? Our DEHN cross-reference page matches the Citel device on IEC 61643-11 type, Iimp, Up and Uc, with every figure’s basis stated. Specified OBO Bettermann? Our OBO cross-reference page translates the B and C letters into IEC types and matches the Citel device on the published ratings. Chat on WhatsApp