Predictive control method adopted
to optimise demand control
Field programmable CT & PT ratios
Demand profile generation for
setting realistic demand targets
Records 5 peak demands with date
& time
Time of the day (TOD) facility
Integration time selectable : 15/30
minutes
RS485 communication interface
to PC (optional)
3 Control outputs for better control
ICD Maximum Demand Controller is applicable for medium and large scale
industries to reduce demand peaks without affecting their operation. Maximum demand
charges are collected based on the highest recorded demand peak in the month.
By temporarily reducing or cycling the loads during the periods of high demand the
maximum demand charges can be reduced.
Two major benefits when maximum demand is limited to a predetermined level.
1) Released electrical system capacity
2) Reduced operating cost.
Controllable Loads
1) Some electrical equipments load can be turned OFF for few minutes to hours
without causing loss of production in convenience or harm. Heating process like
storage water, slab, storage room, ventilation and air conditioner and battery charger
are some of the loads that can be differed to reduce demand charges.
2) Other restricted load to be carefully controlled are: Air compressor, Process
Grinders, Refrigeration Motor, Electrical Furnaces, Pumps, Kilns etc.
Maximum demand controller is a device designed to meet the need of load
management for industries. Alarm is sounded when demand approaches a preset value.
If corrective action is not taken, the controller switches OFF non essential loads in a
sequence. The plant equipments selected for load management are stopped and
restarted. Demand control is achieved by using suitable contactors and electrical hooters.
Applications
Main Incomers in Substations
Hospitals and Hotels
Process Control Industries
Technical Specification
MEASURED QUANTITIES
1) 3 Phase, Phase to Neutral Voltage
2) 3 Phase, Phase to Phase Voltage
3) 3 Phase Current and Total kVA
4) Rising demand and demand time
5) Predictive demand
6) Additional load capacity
7)Time available to exceed the set point
8) Maximum demand with date & time
9) 24 hour demand with date & time
10)Cumulative maximum demand
11)MD reset count
12)TOD demand and demand profile
Ratings
Voltage Range : 80V to 520V AC line to line for LT
25V to 140V AC line to line for HT
Standard Current : 1A / 5A
Max. Current : 1.5A / 7.5A
Frequency Range : 40.00 to 60.00 Hz
Auxiliary Supply : 240V AC (-20% to +10%)
Operating Temperature: 55° C (Max.)
Display
Type : 7 digit 0.5" high bright 7 segment Red
colour LED Display
Character Size : 4.35 (H) x 2.95 (W) mm
LED Indication : Relay ON and Load Add/Remove
Key Functions
Key Pad : 8 Keys namely Index, Shift, Increment
and Enter used for Program mode
setting and Run mode selection
Program mode Parameters: PT Primary Voltage, CT Primary Current, Device address and
Run hour MD Reset
Unauthorized Person Entry Protection: Provided through Password Facility
Setting, Energy
and Run hour
Storage in EERAM.
Measurement
Method : 3 Phase 4 wire for LT. 3 Phase 3 wire for HT
Accuracy : Class 0.5, 1
Output
Relay Output : 3 (1 for predictive demand and 2 for
rising demand)
