Power Standards Overview
802.3af (Standard PoE) delivers up to 15.4 W per port, 802.3at (PoE+) up to 30 W, and 802.3bt (Ultra PoE) provides 60 W (Type 3) or 90 W (Type 4). The usable power after cable loss is roughly 12.95 W, 25.5 W and 51 W/73 W respectively.
Why KAS Info Tech’s Deployments Matter
KAS Info Tech, ISO 9001:2015 certified and GeM‑empanelled, has powered more than 850 Rajasthan Police stations, the Alwar railway station high‑speed surveillance, and DMart & Blinkit dark‑store networks. All projects rely on correctly sized PoE budgets to avoid downtime.
Port‑Count Power Budget Tables
| Port Count | Standard | Per‑Port Power (W) | Maximum Budget (W) |
|---|---|---|---|
| 8 | 802.3af (PoE) | 12.95 | 103.6 |
| 8 | 802.3at (PoE+) | 25.5 | 204 |
| 8 | 802.3bt‑T3 (60 W) | 51 | 408 |
| 8 | 802.3bt‑T4 (90 W) | 73 | 584 |
| 16 | 802.3af (PoE) | 12.95 | 207.2 |
| 16 | 802.3at (PoE+) | 25.5 | 408 |
| 16 | 802.3bt‑T3 (60 W) | 51 | 816 |
| 16 | 802.3bt‑T4 (90 W) | 73 | 1168 |
| 24 | 802.3af (PoE) | 12.95 | 310.8 |
| 24 | 802.3at (PoE+) | 25.5 | 612 |
| 24 | 802.3bt‑T3 (60 W) | 51 | 1224 |
| 24 | 802.3bt‑T4 (90 W) | 73 | 1752 |
Real‑World Pricing (April 2026)
- 8‑port PoE (15.4 W) – ₹7,800 ± ₹500 (Hikvision, CP Plus)
- 8‑port PoE+ (30 W) – ₹12,200 ± ₹800 (Cisco Meraki, Matrix)
- 8‑port Ultra PoE (60 W) – ₹22,500 ± ₹1,200 (Dahua, Cisco)
- 16‑port PoE+ – ₹28,000 ± ₹1,500
- 24‑port PoE+ – ₹35,000 ± ₹2,000
- 24‑port Ultra PoE (90 W) – ₹68,000 ± ₹3,500
All prices include a 2‑year warranty, 24/7 helpline (+91 80581 22233) and optional on‑site commissioning by KAS Info Tech.
High‑Draw Devices: PTZ Cameras with IR & Heaters
Typical PTZ units used in warehouses (e.g., Hikvision DS‑2DE4A425IW‑DE) consume 30 W at full tilt, pan and IR illumination. Adding a 10 W heater for cold‑store environments raises the per‑camera demand to 40 W.
- Determine the number of PTZ cameras per area.
- Multiply by the worst‑case draw (40 W).
- Compare against the switch’s usable budget (see table).
Example: A 24‑port PoE+ switch (max 612 W) can safely host up to 15 PTZ cameras (15 × 40 W = 600 W) leaving ~12 W for auxiliary devices (e.g., access‑point).
Long‑Range PoE Mode (250 m @ 10 Mbps)
Standard Ethernet limits PoE to 100 m. For sprawling factories, KAS Info Tech recommends the 802.3bt long‑range mode combined with passive PoE extenders. The mode reduces data rate to 10 Mbps, extending reach to 250 m without active repeaters.
- Use Category‑5e or higher, low‑capacitance cable.
- Limit per‑port draw to 15 W (standard PoE) to stay within the 250 m power envelope.
- Deploy a powered mid‑span injector at 125 m to halve the loss if you need >15 W.
In the Alwar railway station project, KAS Info Tech installed 250 m PoE links for 8‑MP bullet cameras, achieving 99 % uptime with a single 24‑port PoE+ switch.
Checklist for Procurement
- Identify the maximum per‑port power requirement (camera, AP, IoT sensor).
- Select the PoE class that meets or exceeds that requirement.
- Calculate total power draw and add 20 % safety margin.
- Verify that the switch’s power‑budget column in the table covers the total.
- Confirm that the switch supports the desired long‑range mode if cabling exceeds 100 m.
- Check OEM partnership (Hikvision, CP Plus, Dahua, Cisco) for firmware compatibility.
- Obtain a KAS Info Tech quote that includes installation, testing and 24/7 support.
Conclusion
Accurate power budgeting prevents costly field trips and protects high‑value PTZ cameras. By using the tables above, applying the 20 % headroom rule, and leveraging KAS Info Tech’s ISO‑certified deployment expertise, factories and warehouses across Rajasthan can achieve reliable, scalable PoE networks at transparent Indian market prices.
Frequently Asked Questions
| What is the practical difference between PoE+ and Ultra PoE for PTZ cameras? | PoE+ (30 W) powers most PTZ units with IR, but Ultra PoE (60‑90 W) is required for cameras that include built‑in heaters or dual‑lens analytics. Ultra PoE also future‑proofs for AI edge processors. |
| Can I mix PoE and PoE+ ports on the same switch? | Yes. Certified 802.3bt switches expose both 30 W and 60/90 W ports, allowing you to allocate high‑draw devices only where needed. |
| How does cable length affect the usable power? | At 100 m, voltage drop reduces usable power by ~10 %. For 250 m long‑range mode, limit per‑port draw to 15 W or use a mid‑span injector. |
| Is there a warranty on the PoE budget? | KAS Info Tech offers a 2‑year warranty on all switches, plus a 24/7 support helpline. Power‑budget failures are covered under the warranty if caused by hardware defects. |
| Do I need a separate UPS for PoE switches? | A UPS sized for the total switch power (budget + headroom) ensures uninterrupted surveillance. For a 24‑port PoE+ switch (≈ 650 W total), a 1 kVA UPS provides ~15 minutes of runtime. |