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July 2026 · Energy Management

Contract Demand vs Sanctioned Demand vs Connected Load — Explained

Three terms appear on almost every commercial and industrial electricity connection document in India — connected load, sanctioned demand, and contract demand — and they are frequently confused with each other and with maximum demand. Getting them right matters because billing penalties hinge on the gap between recorded maximum demand and contract demand. Understanding the distinctions is the starting point for effective demand management.

Connected load — the installed sum, not what you draw

Connected load is the sum of the nameplate ratings of every electrical device installed at a premises — motors, HVAC units, lighting circuits, welding machines, ovens, elevators, and anything else wired into the system. Add up all those nameplates and you have the connected load, expressed in kW or kVA.

Connected load is a theoretical ceiling. It represents the maximum possible power draw if every device ran simultaneously at full rated output — something that does not happen in any real facility. A factory with a 2,000 kVA connected load might run its actual demand anywhere from 400 kVA on a quiet Saturday to 1,400 kVA during peak production. The connected load tells you the theoretical worst case, not the operating reality.

Utilities use connected load when evaluating whether to grant a new connection — it helps them size transformers, cables, and protection equipment. For billing purposes, however, connected load is not what matters. That role belongs to contract demand.

Sanctioned demand and contract demand — the utility’s commitment to you

Sanctioned demand (also called contract demand) is the kVA or kW figure the utility formally agrees to supply to your premises. It is set out in your connection sanction letter and referenced in the tariff schedule under which you are billed. The utility is committing to keep this capacity available to you at all times — and in return, you agree to pay demand charges based on this figure, regardless of whether you actually draw that much in a given month.

In most Indian utility contexts the two terms — sanctioned demand and contract demand — refer to the same number. The difference is more administrative than technical: ‘sanctioned demand’ tends to appear in the initial approval and connection documentation, while ‘contract demand’ appears in the tariff schedule and billing. If your documents use both terms and the numbers differ, consult your DISCOM; in practice they should match.

Terminology varies by state — check your documents

Some DISCOMs use ‘sanctioned load’ and ‘contract demand’ to mean different things; others use kW where the tariff formula expects kVA. Always read your specific tariff order and connection sanction letter together. The definitions in those documents govern your billing, not general terminology.

Contract demand is not the same as connected load. A facility with 2,000 kVA of connected equipment might negotiate a contract demand of 1,200 kVA, reflecting the realistic simultaneous demand rather than the theoretical maximum. Setting contract demand too low risks regular exceedance penalties; setting it too high means paying demand charges on capacity you never use. Getting the number right — and keeping it current as the facility changes — is a genuine cost-management decision.

Maximum demand — what you actually draw, measured by the billing meter

Maximum demandis the highest averaged power your facility drew in any single measurement interval during the billing period, as recorded by the utility’s meter. The interval is typically 15 or 30 minutes, though this varies by DISCOM and tariff category — your tariff schedule will specify it. The meter continuously computes the average demand over each successive interval and records the highest value seen during the month as maximum demand.

This is the number that triggers — or avoids — the demand penalty. When recorded maximum demand stays at or below contract demand, no exceedance penalty applies. When it crosses contract demand, even by a small margin, the penalty kicks in. The exact penalty structure varies by state DISCOM and tariff category, but in many cases it applies a higher rate to the excess or recalculates the entire month’s demand charge on the higher figure.

The asymmetry is stark: a single 15-minute window of elevated load — simultaneous motor starts, a production surge, HVAC and process loads coinciding — can set the month’s maximum demand and trigger a penalty that applies to the entire billing period’s demand charge. This is why the interval is what matters, not the average across the month.

How the four terms relate — a working summary

It helps to think of these four quantities as a hierarchy:

  • 1.Connected load — the sum of all installed equipment ratings. The theoretical maximum. Set once when the facility is wired and changes only when equipment is added or removed. Typically the largest number.
  • 2.Sanctioned / contract demand — the capacity the utility agrees to supply. Set by negotiation at the time of connection and revised by formal application. Typically lower than connected load because not everything runs at once. Fixed until you revise it.
  • 3.Maximum demand — the highest 15- or 30-minute average actually recorded during the billing period. Varies month to month. The billing metric that governs whether a penalty applies.
  • 4.Billing demand — what the DISCOM actually uses to compute your demand charge. May be the higher of recorded MD and a minimum percentage of contract demand, or subject to a ratchet based on recent peaks. Check your tariff schedule for the exact definition.

The penalty risk lives in the gap between items 2 and 3 — when maximum demand crosses above contract demand. The billing demand concept (item 4) further complicates matters by ensuring that even a short period of low consumption doesn’t let you escape demand charges entirely.

Why monitoring maximum demand against contract demand is non-negotiable

The gap between contract demand and actual maximum demand is the single number that determines whether you pay a penalty or not — yet most facilities have no real-time visibility into it. The utility meter records MD and reports it on the bill; by then the penalty interval is weeks in the past and nothing can be done.

Preventing an exceedance requires knowing — during the 15-minute interval, before it closes — that demand is trending too high. This is what real-time demand monitoring provides. The Titan energy meter (Class 0.5S per IEC 62053-22) computes demand continuously using the same block or sliding-window method your DISCOM meter uses, tracks how much headroom remains before your contract demand limit, and sends configurable alerts when the trajectory suggests a breach is likely within the current interval.

That alert window — even two or three minutes before the interval closes — is enough for an energy manager or control system to defer a compressor start, reduce chiller setpoint, or pause a non-critical batch process. Titan monitors and provides the advance warning; the load reduction action is taken by your operator or connected EMS/PLC.

Beyond prevention, demand monitoring data also informs contract demand decisions. If maximum demand consistently sits well below contract demand for months, the facility may be over-contracted and paying unnecessary minimum demand charges. If it regularly approaches or crosses the limit, a demand revision (upward) or a load management programme (to keep demand under the current limit) may be warranted. Either way, the data is what makes the decision auditable.

Frequently Asked Questions

Common questions about connected load, sanctioned demand, contract demand, and maximum demand on Indian electricity connections.

Connected load is the arithmetic sum of the rated kW or kVA of every electrical device installed at a facility — motors, lighting, HVAC units, welding sets, and anything else wired into the electrical system. It represents the theoretical maximum the installation could draw if everything ran simultaneously at full nameplate rating, which almost never happens in practice. Connected load is used by the utility to assess infrastructure requirements and to set an upper bound for sanctioned demand.
In most Indian utility contexts the two terms are used interchangeably and refer to the same thing: the kVA or kW figure the utility agrees to supply to your premises, formalised in your connection documents. Some utilities use 'sanctioned demand' in the initial approval and 'contract demand' in the billing tariff — the number is usually the same. If your connection documents use both terms, compare the figures; if they differ, the tariff schedule's definition governs billing.
Contract demand is fixed — it is what you agreed to with the utility. Maximum demand is measured — it is the highest 15- or 30-minute averaged power your facility actually drew during the billing period. The penalty arises only when recorded maximum demand exceeds contract demand. If you consistently stay below your contract demand, there is no demand exceedance penalty, though many tariffs still charge a minimum demand charge based on a percentage of contract demand even when consumption is low.
Yes. Some state DISCOMs use 'sanctioned load' for the total installed capacity and 'contract demand' for the billing threshold. Others use 'assessed demand' or 'connected load' in ways that overlap. A few use kW, others kVA. Always read your specific tariff order and connection sanction letter together — they define the terms as your DISCOM uses them, which is what matters for your bill.
When recorded maximum demand in a billing period exceeds your contract demand, most tariff schedules apply a penalty on the excess — commonly a higher per-kVA rate on the overdrawn portion, or billing the entire demand charge on the higher figure. Some tariffs also trigger a ratchet, meaning the elevated figure becomes the minimum billing demand for the next several months. The exact penalty structure varies by DISCOM and tariff category; check your tariff schedule for the applicable rule.
You need a meter that computes demand in real time using the same interval method your DISCOM uses — typically a 15- or 30-minute block or sliding window. The Titan energy meter (Class 0.5S per IEC 62053-22) does this continuously and sends configurable alerts when demand is tracking toward your contract limit, giving your team time to defer or stagger loads before the interval closes. Titan monitors and alerts — load curtailment is an operator or control-system action.

Related Reading

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Maximum Demand Monitoring — Solution Overview

How Tech OVN tracks real-time demand against your contract limit and alerts before an exceedance — block and sliding-window methods both supported.

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Titan — Class 0.5S Smart Energy Meter

Three-phase DIN-rail energy meter with configurable demand interval, block and sliding-window demand computation, and cloud alerting.

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See your demand headroom in real time

Titan tracks maximum demand against your contract limit continuously — so your team can act before the interval closes, not after the bill arrives.

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